author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 14 Apr 2010 17:44:02 +0300 | |
branch | RCL_3 |
changeset 17 | ef2ebc87518f |
parent 0 | e4d67989cc36 |
child 33 | 6896b031c3e1 |
permissions | -rw-r--r-- |
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/* |
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* Portions Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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* |
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* Copyright (c) 1997-1999 |
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* Silicon Graphics Computer Systems, Inc. |
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* |
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* Copyright (c) 1999 |
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* Boris Fomitchev |
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* |
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* This material is provided "as is", with absolutely no warranty expressed |
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* or implied. Any use is at your own risk. |
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* |
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* Permission to use or copy this software for any purpose is hereby granted |
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* without fee, provided the above notices are retained on all copies. |
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* Permission to modify the code and to distribute modified code is granted, |
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* provided the above notices are retained, and a notice that the code was |
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* modified is included with the above copyright notice. |
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* |
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*/ |
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// WARNING: This is an internal header file, included by other C++ |
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// standard library headers. You should not attempt to use this header |
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// file directly. |
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#ifndef _STLP_INTERNAL_THREADS_H |
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#define _STLP_INTERNAL_THREADS_H |
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// Supported threading models are native SGI, pthreads, uithreads |
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// (similar to pthreads, but based on an earlier draft of the Posix |
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// threads standard), and Win32 threads. Uithread support by Jochen |
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// Schlick, 1999, and Solaris threads generalized to them. |
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#ifndef _STLP_INTERNAL_CSTDDEF |
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# include <stl/_cstddef.h> |
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#endif |
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#ifndef _STLP_INTERNAL_CSTDLIB |
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# include <stl/_cstdlib.h> |
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#endif |
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// On SUN and Mac OS X gcc, zero-initialization works just fine... |
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#if defined (__sun) || (defined (__GNUC__) && defined(__APPLE__)) |
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# define _STLP_MUTEX_INITIALIZER |
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#endif |
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/* This header defines the following atomic operation that platform should |
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* try to support as much as possible. Atomic operation are exposed as macro |
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* in order to easily test for their existance. They are: |
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* __stl_atomic_t _STLP_ATOMIC_INCREMENT(volatile __stl_atomic_t* __ptr) : |
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* increment *__ptr by 1 and returns the new value |
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* __stl_atomic_t _STLP_ATOMIC_DECREMENT(volatile __stl_atomic_t* __ptr) : |
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* decrement *__ptr by 1 and returns the new value |
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* __stl_atomic_t _STLP_ATOMIC_EXCHANGE(volatile __stl_atomic_t* __target, __stl_atomic_t __val) : |
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* assign __val to *__target and returns former *__target value |
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* void* _STLP_ATOMIC_EXCHANGE_PTR(void* volatile* __target, void* __ptr) : |
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* assign __ptr to *__target and returns former *__target value |
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* __stl_atomic_t _STLP_ATOMIC_ADD(volatile __stl_atomic_t* __target, __stl_atomic_t __val) : |
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* does *__target = *__target + __val and returns the old *__target value |
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*/ |
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#if defined (_STLP_WIN32) || defined (__sgi) || defined (_STLP_SPARC_SOLARIS_THREADS) |
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typedef long __stl_atomic_t; |
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#else |
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/* Don't import whole namespace!!!! - ptr */ |
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// # if defined (_STLP_USE_NAMESPACES) && ! defined (_STLP_VENDOR_GLOBAL_CSTD) |
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// // using _STLP_VENDOR_CSTD::size_t; |
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// using namespace _STLP_VENDOR_CSTD; |
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// # endif |
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typedef size_t __stl_atomic_t; |
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#endif |
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#if defined (_STLP_THREADS) |
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# if defined (_STLP_SGI_THREADS) |
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# include <mutex.h> |
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// Hack for SGI o32 compilers. |
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# if !defined(__add_and_fetch) && \ |
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(__mips < 3 || !(defined (_ABIN32) || defined(_ABI64))) |
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# define __add_and_fetch(__l,__v) add_then_test((unsigned long*)__l,__v) |
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# define __test_and_set(__l,__v) test_and_set(__l,__v) |
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# endif /* o32 */ |
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# if __mips < 3 || !(defined (_ABIN32) || defined(_ABI64)) |
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# define _STLP_ATOMIC_EXCHANGE(__p, __q) test_and_set(__p, __q) |
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# else |
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# define _STLP_ATOMIC_EXCHANGE(__p, __q) __test_and_set((unsigned long*)__p, (unsigned long)__q) |
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# endif |
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# define _STLP_ATOMIC_INCREMENT(__x) __add_and_fetch(__x, 1) |
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# define _STLP_ATOMIC_DECREMENT(__x) __add_and_fetch(__x, (size_t) -1) |
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# elif defined (_STLP_PTHREADS) |
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# include <pthread.h> |
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# if !defined (_STLP_USE_PTHREAD_SPINLOCK) |
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# if defined (PTHREAD_MUTEX_INITIALIZER) && !defined (_STLP_MUTEX_INITIALIZER) && defined (_REENTRANT) |
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# define _STLP_MUTEX_INITIALIZER = { PTHREAD_MUTEX_INITIALIZER } |
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# endif |
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//HPUX variants have (on some platforms optional) non-standard "DCE" pthreads impl |
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# if defined (_DECTHREADS_) && (defined (_PTHREAD_USE_D4) || defined (__hpux)) && !defined (_CMA_SUPPRESS_EXTERNALS_) |
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# define _STLP_PTHREAD_ATTR_DEFAULT pthread_mutexattr_default |
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# else |
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# define _STLP_PTHREAD_ATTR_DEFAULT 0 |
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# endif |
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# else // _STLP_USE_PTHREAD_SPINLOCK |
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# if defined (__OpenBSD__) |
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# include <spinlock.h> |
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# endif |
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# endif // _STLP_USE_PTHREAD_SPINLOCK |
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112 |
|
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# if defined (__GNUC__) && defined (__i386__) |
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114 |
|
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# if !defined (_STLP_ATOMIC_INCREMENT) |
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inline long _STLP_atomic_increment_gcc_x86(long volatile* p) { |
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long result; |
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__asm__ __volatile__ |
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("lock; xaddl %1, %0;" |
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:"=m" (*p), "=r" (result) |
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:"m" (*p), "1" (1) |
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:"cc"); |
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return result + 1; |
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} |
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# define _STLP_ATOMIC_INCREMENT(__x) (_STLP_atomic_increment_gcc_x86((long volatile*)__x)) |
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# endif |
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127 |
|
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# if !defined (_STLP_ATOMIC_DECREMENT) |
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inline long _STLP_atomic_decrement_gcc_x86(long volatile* p) { |
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long result; |
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__asm__ __volatile__ |
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("lock; xaddl %1, %0;" |
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:"=m" (*p), "=r" (result) |
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:"m" (*p), "1" (-1) |
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:"cc"); |
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return result - 1; |
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} |
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# define _STLP_ATOMIC_DECREMENT(__x) (_STLP_atomic_decrement_gcc_x86((long volatile*)__x)) |
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# endif |
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140 |
|
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# if !defined (_STLP_ATOMIC_ADD) |
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inline long _STLP_atomic_add_gcc_x86(long volatile* p, long addend) { |
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long result; |
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__asm__ __volatile__ |
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("lock; xaddl %1, %0;" |
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:"=m" (*p), "=r" (result) |
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:"m" (*p), "1" (addend) |
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:"cc"); |
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return result + addend; |
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} |
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# define _STLP_ATOMIC_ADD(__dst, __val) (_STLP_atomic_add_gcc_x86((long volatile*)__dst, (long)__val)) |
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# endif |
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153 |
|
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# endif /* if defined(__GNUC__) && defined(__i386__) */ |
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|
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# elif defined (_STLP_WIN32THREADS) |
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|
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# if !defined (_STLP_ATOMIC_INCREMENT) |
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# if !defined (_STLP_NEW_PLATFORM_SDK) |
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# define _STLP_ATOMIC_INCREMENT(__x) InterlockedIncrement(__CONST_CAST(long*, __x)) |
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# define _STLP_ATOMIC_DECREMENT(__x) InterlockedDecrement(__CONST_CAST(long*, __x)) |
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# define _STLP_ATOMIC_EXCHANGE(__x, __y) InterlockedExchange(__CONST_CAST(long*, __x), __y) |
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# else |
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# define _STLP_ATOMIC_INCREMENT(__x) InterlockedIncrement(__x) |
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# define _STLP_ATOMIC_DECREMENT(__x) InterlockedDecrement(__x) |
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# define _STLP_ATOMIC_EXCHANGE(__x, __y) InterlockedExchange(__x, __y) |
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# endif |
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# define _STLP_ATOMIC_EXCHANGE_PTR(__x, __y) STLPInterlockedExchangePointer(__x, __y) |
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/* |
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* The following functionnality is only available since Windows 98, those that are targeting previous OSes |
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* should define _WIN32_WINDOWS to a value lower that the one of Win 98, see Platform SDK documentation for |
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* more informations: |
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*/ |
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# if defined (_STLP_NEW_PLATFORM_SDK) && (!defined (_STLP_WIN32_VERSION) || (_STLP_WIN32_VERSION >= 0x0410)) |
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# define _STLP_ATOMIC_ADD(__dst, __val) InterlockedExchangeAdd(__dst, __val) |
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# endif |
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# endif |
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|
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# elif defined (__DECC) || defined (__DECCXX) |
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|
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# include <machine/builtins.h> |
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# define _STLP_ATOMIC_EXCHANGE __ATOMIC_EXCH_LONG |
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# define _STLP_ATOMIC_INCREMENT(__x) __ATOMIC_ADD_LONG(__x, 1) |
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# define _STLP_ATOMIC_DECREMENT(__x) __ATOMIC_ADD_LONG(__x, -1) |
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|
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# elif defined(_STLP_SPARC_SOLARIS_THREADS) |
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|
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# include <stl/_sparc_atomic.h> |
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|
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# elif defined (_STLP_UITHREADS) |
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191 |
|
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// this inclusion is potential hazard to bring up all sorts |
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// of old-style headers. Let's assume vendor already know how |
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// to deal with that. |
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# ifndef _STLP_INTERNAL_CTIME |
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# include <stl/_ctime.h> |
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# endif |
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# if defined (_STLP_USE_NAMESPACES) && ! defined (_STLP_VENDOR_GLOBAL_CSTD) |
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using _STLP_VENDOR_CSTD::time_t; |
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# endif |
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# include <synch.h> |
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# include <cstdio> |
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# include <cwchar> |
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204 |
|
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# elif defined (_STLP_BETHREADS) |
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206 |
|
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# include <OS.h> |
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# include <cassert> |
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# include <stdio.h> |
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# define _STLP_MUTEX_INITIALIZER = { 0 } |
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211 |
|
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# elif defined (_STLP_NWTHREADS) |
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213 |
|
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# include <nwthread.h> |
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# include <nwsemaph.h> |
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216 |
|
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# elif defined(_STLP_OS2THREADS) |
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218 |
|
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# if defined (__GNUC__) |
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# define INCL_DOSSEMAPHORES |
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# include <os2.h> |
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# else |
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// This section serves to replace os2.h for VisualAge C++ |
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typedef unsigned long ULONG; |
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# if !defined (__HEV__) /* INCL_SEMAPHORE may also define HEV */ |
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# define __HEV__ |
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typedef ULONG HEV; |
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typedef HEV* PHEV; |
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# endif |
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typedef ULONG APIRET; |
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typedef ULONG HMTX; |
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typedef HMTX* PHMTX; |
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typedef const char* PCSZ; |
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typedef ULONG BOOL32; |
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APIRET _System DosCreateMutexSem(PCSZ pszName, PHEV phev, ULONG flAttr, BOOL32 fState); |
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APIRET _System DosRequestMutexSem(HMTX hmtx, ULONG ulTimeout); |
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APIRET _System DosReleaseMutexSem(HMTX hmtx); |
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APIRET _System DosCloseMutexSem(HMTX hmtx); |
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# define _STLP_MUTEX_INITIALIZER = { 0 } |
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# endif /* GNUC */ |
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|
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# endif |
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|
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#else |
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/* no threads */ |
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# define _STLP_ATOMIC_INCREMENT(__x) ++(*__x) |
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# define _STLP_ATOMIC_DECREMENT(__x) --(*__x) |
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/* We do not grant other atomic operations as they are useless if STLport do not have |
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* to be thread safe |
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*/ |
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#endif |
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|
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#if !defined (_STLP_MUTEX_INITIALIZER) |
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# if defined(_STLP_ATOMIC_EXCHANGE) |
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# define _STLP_MUTEX_INITIALIZER = { 0 } |
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# elif defined(_STLP_UITHREADS) |
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# define _STLP_MUTEX_INITIALIZER = { DEFAULTMUTEX } |
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# else |
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# define _STLP_MUTEX_INITIALIZER |
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# endif |
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#endif |
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|
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263 |
|
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_STLP_BEGIN_NAMESPACE |
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|
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#if defined (_STLP_THREADS) && !defined (_STLP_USE_PTHREAD_SPINLOCK) |
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// Helper struct. This is a workaround for various compilers that don't |
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// handle static variables in inline functions properly. |
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template <int __inst> |
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struct _STLP_mutex_spin { |
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enum { __low_max = 30, __high_max = 1000 }; |
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// Low if we suspect uniprocessor, high for multiprocessor. |
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//Note: For SYMBIAN Emulator, these entries are to be considered WSD. |
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//Still, EWSD solution can't be applied since it's templated. |
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static unsigned __max; |
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static unsigned __last; |
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static void _STLP_CALL _M_do_lock(volatile __stl_atomic_t* __lock); |
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static void _STLP_CALL _S_nsec_sleep(int __log_nsec); |
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}; |
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#endif // !_STLP_USE_PTHREAD_SPINLOCK |
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|
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// Locking class. Note that this class *does not have a constructor*. |
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// It must be initialized either statically, with _STLP_MUTEX_INITIALIZER, |
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// or dynamically, by explicitly calling the _M_initialize member function. |
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// (This is similar to the ways that a pthreads mutex can be initialized.) |
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// There are explicit member functions for acquiring and releasing the lock. |
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|
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// There is no constructor because static initialization is essential for |
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// some uses, and only a class aggregate (see section 8.5.1 of the C++ |
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// standard) can be initialized that way. That means we must have no |
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// constructors, no base classes, no virtual functions, and no private or |
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// protected members. |
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|
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// For non-static cases, clients should use _STLP_mutex. |
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|
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struct _STLP_CLASS_DECLSPEC _STLP_mutex_base { |
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#if defined (_STLP_ATOMIC_EXCHANGE) || defined (_STLP_SGI_THREADS) |
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// It should be relatively easy to get this to work on any modern Unix. |
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volatile __stl_atomic_t _M_lock; |
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#endif |
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|
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#if defined (_STLP_THREADS) |
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# if defined (_STLP_ATOMIC_EXCHANGE) |
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inline void _M_initialize() { _M_lock = 0; } |
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inline void _M_destroy() {} |
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|
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void _M_acquire_lock() { |
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_STLP_mutex_spin<0>::_M_do_lock(&_M_lock); |
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} |
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310 |
|
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inline void _M_release_lock() { |
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volatile __stl_atomic_t* __lock = &_M_lock; |
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# if defined(_STLP_SGI_THREADS) && defined(__GNUC__) && __mips >= 3 |
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asm("sync"); |
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*__lock = 0; |
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# elif defined(_STLP_SGI_THREADS) && __mips >= 3 && \ |
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(defined (_ABIN32) || defined(_ABI64)) |
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__lock_release(__lock); |
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# elif defined (_STLP_SPARC_SOLARIS_THREADS) |
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# if defined (__WORD64) || defined (__arch64__) || defined (__sparcv9) || defined (__sparcv8plus) |
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asm("membar #StoreStore ; membar #LoadStore"); |
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# else |
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asm(" stbar "); |
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# endif |
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*__lock = 0; |
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# else |
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*__lock = 0; |
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// This is not sufficient on many multiprocessors, since |
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// writes to protected variables and the lock may be reordered. |
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# endif |
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} |
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# elif defined (_STLP_PTHREADS) |
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# if defined (_STLP_USE_PTHREAD_SPINLOCK) |
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# if !defined (__OpenBSD__) |
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pthread_spinlock_t _M_lock; |
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inline void _M_initialize() { pthread_spin_init( &_M_lock, 0 ); } |
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inline void _M_destroy() { pthread_spin_destroy( &_M_lock ); } |
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338 |
|
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// sorry, but no static initializer for pthread_spinlock_t; |
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// this will not work for compilers that has problems with call |
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// constructor of static object... |
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342 |
|
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// _STLP_mutex_base() |
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// { pthread_spin_init( &_M_lock, 0 ); } |
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345 |
|
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// ~_STLP_mutex_base() |
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// { pthread_spin_destroy( &_M_lock ); } |
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348 |
|
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inline void _M_acquire_lock() { pthread_spin_lock( &_M_lock ); } |
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inline void _M_release_lock() { pthread_spin_unlock( &_M_lock ); } |
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# else // __OpenBSD__ |
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spinlock_t _M_lock; |
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inline void _M_initialize() { _SPINLOCK_INIT( &_M_lock ); } |
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inline void _M_destroy() { } |
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inline void _M_acquire_lock() { _SPINLOCK( &_M_lock ); } |
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inline void _M_release_lock() { _SPINUNLOCK( &_M_lock ); } |
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# endif // __OpenBSD__ |
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# else // !_STLP_USE_PTHREAD_SPINLOCK |
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pthread_mutex_t _M_lock; |
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inline void _M_initialize() |
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{ pthread_mutex_init(&_M_lock,_STLP_PTHREAD_ATTR_DEFAULT); } |
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inline void _M_destroy() |
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{ pthread_mutex_destroy(&_M_lock); } |
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inline void _M_acquire_lock() { |
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# if defined ( __hpux ) && ! defined (PTHREAD_MUTEX_INITIALIZER) |
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if (!_M_lock.field1) _M_initialize(); |
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# endif |
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pthread_mutex_lock(&_M_lock); |
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} |
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inline void _M_release_lock() { pthread_mutex_unlock(&_M_lock); } |
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# endif // !_STLP_USE_PTHREAD_SPINLOCK |
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372 |
|
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# elif defined (_STLP_UITHREADS) |
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mutex_t _M_lock; |
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inline void _M_initialize() |
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{ mutex_init(&_M_lock, 0, NULL); } |
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inline void _M_destroy() |
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{ mutex_destroy(&_M_lock); } |
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inline void _M_acquire_lock() { mutex_lock(&_M_lock); } |
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inline void _M_release_lock() { mutex_unlock(&_M_lock); } |
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381 |
|
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# elif defined (_STLP_OS2THREADS) |
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HMTX _M_lock; |
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inline void _M_initialize() { DosCreateMutexSem(NULL, &_M_lock, 0, false); } |
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inline void _M_destroy() { DosCloseMutexSem(_M_lock); } |
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386 |
inline void _M_acquire_lock() { |
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if (!_M_lock) _M_initialize(); |
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DosRequestMutexSem(_M_lock, SEM_INDEFINITE_WAIT); |
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389 |
} |
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390 |
inline void _M_release_lock() { DosReleaseMutexSem(_M_lock); } |
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# elif defined (_STLP_BETHREADS) |
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sem_id sem; |
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inline void _M_initialize() { |
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sem = create_sem(1, "STLPort"); |
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assert(sem > 0); |
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} |
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397 |
inline void _M_destroy() { |
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int t = delete_sem(sem); |
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399 |
assert(t == B_NO_ERROR); |
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400 |
} |
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inline void _M_acquire_lock(); |
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inline void _M_release_lock() { |
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status_t t = release_sem(sem); |
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assert(t == B_NO_ERROR); |
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} |
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# elif defined (_STLP_NWTHREADS) |
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LONG _M_lock; |
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inline void _M_initialize() |
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{ _M_lock = OpenLocalSemaphore(1); } |
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inline void _M_destroy() |
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{ CloseLocalSemaphore(_M_lock); } |
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412 |
inline void _M_acquire_lock() |
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{ WaitOnLocalSemaphore(_M_lock); } |
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inline void _M_release_lock() { SignalLocalSemaphore(_M_lock); } |
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# else //*ty 11/24/2001 - added configuration check |
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# error "Unknown thread facility configuration" |
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# endif |
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#else /* No threads */ |
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inline void _M_initialize() {} |
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inline void _M_destroy() {} |
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inline void _M_acquire_lock() {} |
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inline void _M_release_lock() {} |
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#endif // _STLP_PTHREADS |
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}; |
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425 |
|
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// Locking class. The constructor initializes the lock, the destructor destroys it. |
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// Well - behaving class, does not need static initializer |
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428 |
|
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class _STLP_CLASS_DECLSPEC _STLP_mutex : public _STLP_mutex_base { |
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430 |
public: |
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inline _STLP_mutex () { _M_initialize(); } |
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inline ~_STLP_mutex () { _M_destroy(); } |
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433 |
private: |
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_STLP_mutex(const _STLP_mutex&); |
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void operator=(const _STLP_mutex&); |
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}; |
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437 |
|
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// A locking class that uses _STLP_STATIC_MUTEX. The constructor takes |
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// a reference to an _STLP_STATIC_MUTEX, and acquires a lock. The destructor |
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// releases the lock. |
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// It's not clear that this is exactly the right functionality. |
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// It will probably change in the future. |
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443 |
|
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struct _STLP_CLASS_DECLSPEC _STLP_auto_lock { |
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_STLP_auto_lock(_STLP_STATIC_MUTEX& __lock) : _M_lock(__lock) |
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{ _M_lock._M_acquire_lock(); } |
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~_STLP_auto_lock() |
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{ _M_lock._M_release_lock(); } |
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449 |
|
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450 |
private: |
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_STLP_STATIC_MUTEX& _M_lock; |
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void operator=(const _STLP_auto_lock&); |
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_STLP_auto_lock(const _STLP_auto_lock&); |
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}; |
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455 |
|
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/* |
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* Class _Refcount_Base provides a type, __stl_atomic_t, a data member, |
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* _M_ref_count, and member functions _M_incr and _M_decr, which perform |
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* atomic preincrement/predecrement. The constructor initializes |
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* _M_ref_count. |
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*/ |
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class _STLP_CLASS_DECLSPEC _Refcount_Base { |
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// The data member _M_ref_count |
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#if defined (__DMC__) |
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465 |
public: |
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#endif |
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_STLP_VOLATILE __stl_atomic_t _M_ref_count; |
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|
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#if defined (_STLP_THREADS) && \ |
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(!defined (_STLP_ATOMIC_INCREMENT) || !defined (_STLP_ATOMIC_DECREMENT) || \ |
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(defined (_STLP_WIN32_VERSION) && (_STLP_WIN32_VERSION <= 0x0400))) |
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# define _STLP_USE_MUTEX |
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_STLP_mutex _M_mutex; |
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#endif |
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|
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476 |
public: |
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// Constructor |
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_Refcount_Base(__stl_atomic_t __n) : _M_ref_count(__n) {} |
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|
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// _M_incr and _M_decr |
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#if defined (_STLP_THREADS) |
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# if !defined (_STLP_USE_MUTEX) |
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__stl_atomic_t _M_incr() { return _STLP_ATOMIC_INCREMENT(&_M_ref_count); } |
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__stl_atomic_t _M_decr() { return _STLP_ATOMIC_DECREMENT(&_M_ref_count); } |
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# else |
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# undef _STLP_USE_MUTEX |
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__stl_atomic_t _M_incr() { |
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_STLP_auto_lock l(_M_mutex); |
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return ++_M_ref_count; |
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} |
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__stl_atomic_t _M_decr() { |
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_STLP_auto_lock l(_M_mutex); |
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return --_M_ref_count; |
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} |
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# endif |
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#else /* No threads */ |
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__stl_atomic_t _M_incr() { return ++_M_ref_count; } |
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__stl_atomic_t _M_decr() { return --_M_ref_count; } |
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#endif |
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500 |
}; |
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|
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502 |
_STLP_END_NAMESPACE |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
changeset
|
503 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
504 |
#ifdef __SYMBIAN32__WSD__ |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
505 |
_STLP_DECLSPEC std::_STLP_STATIC_MUTEX& exp_get_threads_S_swap_lock(); |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
506 |
_STLP_DECLSPEC std::_STLP_STATIC_MUTEX& exp_get_threads_0_S_swap_lock(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
507 |
#endif |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
508 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
509 |
_STLP_BEGIN_NAMESPACE |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
510 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
511 |
/* Atomic swap on __stl_atomic_t |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
512 |
* This is guaranteed to behave as though it were atomic only if all |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
513 |
* possibly concurrent updates use _Atomic_swap. |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
514 |
* In some cases the operation is emulated with a lock. |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
515 |
* Idem for _Atomic_swap_ptr |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
516 |
*/ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
517 |
/* Helper struct to handle following cases: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
518 |
* - on platforms where sizeof(__stl_atomic_t) == sizeof(void*) atomic |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
519 |
* exchange can be done on pointers |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
520 |
* - on platform without atomic operation swap is done in a critical section, |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
521 |
* portable but inefficient. |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
522 |
*/ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
523 |
template <int __use_ptr_atomic_swap> |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
524 |
class _Atomic_swap_struct { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
525 |
public: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
526 |
#if defined (_STLP_THREADS) && \ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
527 |
!defined (_STLP_ATOMIC_EXCHANGE) && \ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
528 |
(defined (_STLP_PTHREADS) || defined (_STLP_UITHREADS) || defined (_STLP_OS2THREADS) || \ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
529 |
defined (_STLP_USE_PTHREAD_SPINLOCK) || defined (_STLP_NWTHREADS)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
530 |
# define _STLP_USE_ATOMIC_SWAP_MUTEX |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
531 |
#if !defined(__SYMBIAN32__WSD__) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
532 |
static _STLP_STATIC_MUTEX _S_swap_lock; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
533 |
#else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
534 |
static _STLP_STATIC_MUTEX& get_threads_S_swap_lock() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
535 |
{ return ::exp_get_threads_S_swap_lock(); } |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
536 |
# define _S_swap_lock get_threads_S_swap_lock() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
537 |
#endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
538 |
#endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
539 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
540 |
static __stl_atomic_t _S_swap(_STLP_VOLATILE __stl_atomic_t* __p, __stl_atomic_t __q) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
541 |
#if defined (_STLP_THREADS) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
542 |
# if defined (_STLP_ATOMIC_EXCHANGE) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
543 |
return _STLP_ATOMIC_EXCHANGE(__p, __q); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
544 |
# elif defined (_STLP_USE_ATOMIC_SWAP_MUTEX) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
545 |
_S_swap_lock._M_acquire_lock(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
546 |
__stl_atomic_t __result = *__p; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
547 |
*__p = __q; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
548 |
_S_swap_lock._M_release_lock(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
549 |
return __result; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
550 |
# else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
551 |
# error Missing atomic swap implementation |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
552 |
# endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
553 |
#else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
554 |
/* no threads */ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
555 |
__stl_atomic_t __result = *__p; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
556 |
*__p = __q; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
557 |
return __result; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
558 |
#endif // _STLP_THREADS |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
559 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
560 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
561 |
static void* _S_swap_ptr(void* _STLP_VOLATILE* __p, void* __q) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
562 |
#if defined (_STLP_THREADS) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
563 |
# if defined (_STLP_ATOMIC_EXCHANGE_PTR) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
564 |
return _STLP_ATOMIC_EXCHANGE_PTR(__p, __q); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
565 |
# elif defined (_STLP_ATOMIC_EXCHANGE) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
566 |
_STLP_STATIC_ASSERT(sizeof(__stl_atomic_t) == sizeof(void*)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
567 |
return __REINTERPRET_CAST(void*, _STLP_ATOMIC_EXCHANGE(__REINTERPRET_CAST(volatile __stl_atomic_t*, __p), |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
568 |
__REINTERPRET_CAST(__stl_atomic_t, __q)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
569 |
); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
570 |
# elif defined (_STLP_USE_ATOMIC_SWAP_MUTEX) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
571 |
_S_swap_lock._M_acquire_lock(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
572 |
void *__result = *__p; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
573 |
*__p = __q; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
574 |
_S_swap_lock._M_release_lock(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
575 |
return __result; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
576 |
# else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
577 |
# error Missing pointer atomic swap implementation |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
578 |
# endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
579 |
#else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
580 |
/* no thread */ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
581 |
void *__result = *__p; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
582 |
*__p = __q; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
583 |
return __result; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
584 |
#endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
585 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
586 |
}; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
587 |
#if defined(__SYMBIAN32__WSD__) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
588 |
# undef _S_swap_lock |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
589 |
#endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
590 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
591 |
_STLP_TEMPLATE_NULL |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
592 |
class _Atomic_swap_struct<0> { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
593 |
public: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
594 |
#if defined (_STLP_THREADS) && \ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
595 |
(!defined (_STLP_ATOMIC_EXCHANGE) || !defined (_STLP_ATOMIC_EXCHANGE_PTR)) && \ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
596 |
(defined (_STLP_PTHREADS) || defined (_STLP_UITHREADS) || defined (_STLP_OS2THREADS) || \ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
597 |
defined (_STLP_USE_PTHREAD_SPINLOCK) || defined (_STLP_NWTHREADS)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
598 |
# define _STLP_USE_ATOMIC_SWAP_MUTEX |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
599 |
#if !defined(__SYMBIAN32__WSD__) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
600 |
static _STLP_STATIC_MUTEX _S_swap_lock; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
601 |
#else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
602 |
static _STLP_STATIC_MUTEX& get_threads_0_S_swap_lock() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
603 |
{ return ::exp_get_threads_0_S_swap_lock(); } |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
604 |
# define _S_swap_lock get_threads_0_S_swap_lock() |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
605 |
#endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
606 |
#endif |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
607 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
608 |
static __stl_atomic_t _S_swap(_STLP_VOLATILE __stl_atomic_t* __p, __stl_atomic_t __q) { |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
609 |
#if defined (_STLP_THREADS) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
610 |
# if defined (_STLP_ATOMIC_EXCHANGE) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
611 |
return _STLP_ATOMIC_EXCHANGE(__p, __q); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
612 |
# elif defined (_STLP_USE_ATOMIC_SWAP_MUTEX) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
613 |
/* This should be portable, but performance is expected |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
614 |
* to be quite awful. This really needs platform specific |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
615 |
* code. |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
616 |
*/ |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
617 |
_S_swap_lock._M_acquire_lock(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
618 |
__stl_atomic_t __result = *__p; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
619 |
*__p = __q; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
620 |
_S_swap_lock._M_release_lock(); |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
621 |
return __result; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
622 |
# else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
623 |
# error Missing atomic swap implementation |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
624 |
# endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
625 |
#else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
626 |
/* no threads */ |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
627 |
__stl_atomic_t __result = *__p; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
628 |
*__p = __q; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
629 |
return __result; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
630 |
#endif // _STLP_THREADS |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
631 |
} |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
632 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
633 |
static void* _S_swap_ptr(void* _STLP_VOLATILE* __p, void* __q) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
634 |
#if defined (_STLP_THREADS) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
635 |
# if defined (_STLP_ATOMIC_EXCHANGE_PTR) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
636 |
return _STLP_ATOMIC_EXCHANGE_PTR(__p, __q); |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
637 |
# elif defined (_STLP_ATOMIC_EXCHANGE) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
638 |
_STLP_STATIC_ASSERT(sizeof(__stl_atomic_t) == sizeof(void*)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
639 |
return __REINTERPRET_CAST(void*, _STLP_ATOMIC_EXCHANGE(__REINTERPRET_CAST(volatile __stl_atomic_t*, __p), |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
640 |
__REINTERPRET_CAST(__stl_atomic_t, __q)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
641 |
); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
642 |
# elif defined (_STLP_USE_ATOMIC_SWAP_MUTEX) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
643 |
_S_swap_lock._M_acquire_lock(); |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
644 |
void *__result = *__p; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
645 |
*__p = __q; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
646 |
_S_swap_lock._M_release_lock(); |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
647 |
return __result; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
648 |
# else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
649 |
# error Missing pointer atomic swap implementation |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
650 |
# endif |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
651 |
#else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
652 |
/* no thread */ |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
653 |
void *__result = *__p; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
654 |
*__p = __q; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
655 |
return __result; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
656 |
#endif |
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Revision: 201002
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parents:
diff
changeset
|
657 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
658 |
}; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
659 |
#if defined(__SYMBIAN32__WSD__) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
660 |
# undef _S_swap_lock |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
661 |
#endif |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
662 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
663 |
#if defined (_STLP_MSVC) && (_STLP_MSVC == 1300) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
664 |
# pragma warning (push) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
665 |
# pragma warning (disable : 4189) //__use_ptr_atomic_swap initialized but not used |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
666 |
#endif |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
667 |
|
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
668 |
inline __stl_atomic_t _STLP_CALL _Atomic_swap(_STLP_VOLATILE __stl_atomic_t * __p, __stl_atomic_t __q) { |
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Revision: 201002
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parents:
diff
changeset
|
669 |
const int __use_ptr_atomic_swap = sizeof(__stl_atomic_t) == sizeof(void*); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
670 |
return _Atomic_swap_struct<__use_ptr_atomic_swap>::_S_swap(__p, __q); |
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Revision: 201002
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parents:
diff
changeset
|
671 |
} |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
672 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
673 |
inline void* _STLP_CALL _Atomic_swap_ptr(void* _STLP_VOLATILE* __p, void* __q) { |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
674 |
const int __use_ptr_atomic_swap = sizeof(__stl_atomic_t) == sizeof(void*); |
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Revision: 201002
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parents:
diff
changeset
|
675 |
return _Atomic_swap_struct<__use_ptr_atomic_swap>::_S_swap_ptr(__p, __q); |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
676 |
} |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
677 |
|
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
678 |
#if defined (_STLP_MSVC) && (_STLP_MSVC == 1300) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
679 |
# pragma warning (pop) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
680 |
#endif |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
681 |
|
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
682 |
#if defined (_STLP_BETHREADS) |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
683 |
template <int __inst> |
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parents:
diff
changeset
|
684 |
struct _STLP_beos_static_lock_data { |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
685 |
static bool is_init; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
686 |
struct mutex_t : public _STLP_mutex { |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
687 |
mutex_t() |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
688 |
{ _STLP_beos_static_lock_data<0>::is_init = true; } |
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Revision: 201002
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parents:
diff
changeset
|
689 |
~mutex_t() |
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Revision: 201002
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parents:
diff
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|
690 |
{ _STLP_beos_static_lock_data<0>::is_init = false; } |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
691 |
}; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
692 |
static mutex_t mut; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
693 |
}; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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changeset
|
694 |
|
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
695 |
template <int __inst> |
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Revision: 201002
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parents:
diff
changeset
|
696 |
bool _STLP_beos_static_lock_data<__inst>::is_init = false; |
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Revision: 201002
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parents:
diff
changeset
|
697 |
template <int __inst> |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
698 |
typename _STLP_beos_static_lock_data<__inst>::mutex_t _STLP_beos_static_lock_data<__inst>::mut; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
699 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
700 |
inline void _STLP_mutex_base::_M_acquire_lock() { |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
701 |
if (sem == 0) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
702 |
// we need to initialise on demand here |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
703 |
// to prevent race conditions use our global |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
704 |
// mutex if it's available: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
705 |
if (_STLP_beos_static_lock_data<0>::is_init) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
706 |
_STLP_auto_lock al(_STLP_beos_static_lock_data<0>::mut); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
707 |
if (sem == 0) _M_initialize(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
708 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
709 |
else { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
710 |
// no lock available, we must still be |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
711 |
// in startup code, THERE MUST BE ONE THREAD |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
712 |
// ONLY active at this point. |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
713 |
_M_initialize(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
714 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
715 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
716 |
status_t t; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
717 |
t = acquire_sem(sem); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
718 |
assert(t == B_NO_ERROR); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
719 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
720 |
#endif |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
721 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
722 |
_STLP_END_NAMESPACE |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
723 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
724 |
#if !defined (_STLP_LINK_TIME_INSTANTIATION) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
725 |
# include <stl/_threads.c> |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
726 |
#endif |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
727 |
|
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
728 |
#endif /* _STLP_INTERNAL_THREADS_H */ |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
729 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
730 |
// Local Variables: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
731 |
// mode:C++ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
732 |
// End: |