--- a/epoc32/include/stdapis/stlport/stl/_threads.h Tue Nov 24 13:55:44 2009 +0000
+++ b/epoc32/include/stdapis/stlport/stl/_threads.h Tue Mar 16 16:12:26 2010 +0000
@@ -1,1 +1,666 @@
-_threads.h
+/*
+ * Copyright (c) 1997-1999
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Copyright (c) 1999
+ * Boris Fomitchev
+ *
+ * This material is provided "as is", with absolutely no warranty expressed
+ * or implied. Any use is at your own risk.
+ *
+ * Permission to use or copy this software for any purpose is hereby granted
+ * without fee, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ */
+
+// WARNING: This is an internal header file, included by other C++
+// standard library headers. You should not attempt to use this header
+// file directly.
+// Stl_config.h should be included before this file.
+
+
+#ifndef _STLP_INTERNAL_THREADS_H
+#define _STLP_INTERNAL_THREADS_H
+
+// Supported threading models are native SGI, pthreads, uithreads
+// (similar to pthreads, but based on an earlier draft of the Posix
+// threads standard), and Win32 threads. Uithread support by Jochen
+// Schlick, 1999, and Solaris threads generalized to them.
+
+#ifndef _STLP_CONFIG_H
+#include <stl/_config.h>
+#endif
+
+# if ! defined (_STLP_CSTDDEF)
+# include <cstddef>
+# endif
+
+# if ! defined (_STLP_CSTDLIB)
+# include <cstdlib>
+# endif
+
+// On SUN and Mac OS X gcc, zero-initialization works just fine...
+# if defined (__sun) || ( defined(__GNUC__) && defined(__APPLE__) )
+# define _STLP_MUTEX_INITIALIZER
+# endif
+
+# if defined (_STLP_WIN32) || defined (__sgi) || defined (_STLP_SPARC_SOLARIS_THREADS)
+ typedef long __stl_atomic_t;
+# else
+# if defined (_STLP_USE_NAMESPACES) && ! defined (_STLP_VENDOR_GLOBAL_CSTD)
+// using _STLP_VENDOR_CSTD::size_t;
+using namespace _STLP_VENDOR_CSTD;
+# endif
+ typedef size_t __stl_atomic_t;
+#endif
+
+# if defined(_STLP_SGI_THREADS)
+# include <mutex.h>
+// Hack for SGI o32 compilers.
+#if !defined(__add_and_fetch) && \
+ (__mips < 3 || !(defined (_ABIN32) || defined(_ABI64)))
+# define __add_and_fetch(__l,__v) add_then_test((unsigned long*)__l,__v)
+# define __test_and_set(__l,__v) test_and_set(__l,__v)
+#endif /* o32 */
+
+# if __mips < 3 || !(defined (_ABIN32) || defined(_ABI64))
+# define _STLP_ATOMIC_EXCHANGE(__p, __q) test_and_set(__p, __q)
+# else
+# define _STLP_ATOMIC_EXCHANGE(__p, __q) __test_and_set((unsigned long*)__p, (unsigned long)__q)
+# endif
+
+# define _STLP_ATOMIC_INCREMENT(__x) __add_and_fetch(__x, 1)
+# define _STLP_ATOMIC_DECREMENT(__x) __add_and_fetch(__x, (size_t) -1)
+
+# elif defined (__GNUC__) && defined (__i386__) && defined (__unix__) && defined (_STLP_USE_INLINE_X86_SPINLOCK)
+
+// gcc on i386 linux, freebsd, etc.
+
+// This enables the memory caching on x86 linux. It is critical for SMP
+// without it the performace is DISMAL!
+static inline unsigned long __xchg(volatile __stl_atomic_t* target, int source)
+{
+
+ // The target is refernce in memory rather than the register
+ // because making a copy of it from memory to the register and
+ // back again would ruin the atomic nature of the call.
+ // the source does not need to be delt with atomicly so it can
+ // be copied about as needed.
+ //
+ // The casting of the source is used to prevent gcc from optimizing
+ // in such a way that breaks the atomic nature of this call.
+ //
+ __asm__ __volatile__("xchgl %1,%0"
+ :"=m" (*(volatile long *) target), "=r" (source)
+ :"m" (*(volatile long *) target), "r" (source) );
+ return source;
+
+ // The assembly above does the following atomicly:
+ // int temp=source;
+ // source=(int)(*target);
+ // (int)(*target)=temp;
+ // return source
+}
+
+static inline void __inc_and_fetch(volatile __stl_atomic_t* __x)
+{
+ // Referenced in memory rather than register to preserve the atomic nature.
+ //
+ __asm__ __volatile__(
+ "lock; incl %0"
+ :"=m" (*__x)
+ :"m" (*__x) );
+
+ // The assembly above does the following atomicly:
+ // ++(int)(*__x);
+
+}
+static inline void __dec_and_fetch(volatile __stl_atomic_t* __x)
+{
+ // Referenced in memory rather than register to preserve the atomic nature.
+ //
+ __asm__ __volatile__(
+ "lock; decl %0"
+ :"=m" (*__x)
+ :"m" (*__x) );
+
+ // The assembly above does the following atomicly:
+ // --(int)(*__x);
+}
+
+# define _STLP_ATOMIC_EXCHANGE(target, newValue) ((__xchg(target, newValue)))
+# define _STLP_ATOMIC_INCREMENT(__x) __inc_and_fetch(__x)
+# define _STLP_ATOMIC_DECREMENT(__x) __dec_and_fetch(__x)
+
+# elif defined(_STLP_PTHREADS)
+
+# include <pthread.h>
+# ifndef _STLP_USE_PTHREAD_SPINLOCK
+# if defined(PTHREAD_MUTEX_INITIALIZER) && !defined(_STLP_MUTEX_INITIALIZER)
+# define _STLP_MUTEX_INITIALIZER = { PTHREAD_MUTEX_INITIALIZER }
+# endif
+
+//HPUX variants have (on some platforms optional) non-standard "DCE" pthreads impl
+# if defined(_DECTHREADS_) && (defined(_PTHREAD_USE_D4) || defined(__hpux)) && !defined(_CMA_SUPPRESS_EXTERNALS_)
+# define _STLP_PTHREAD_ATTR_DEFAULT pthread_mutexattr_default
+# else
+# define _STLP_PTHREAD_ATTR_DEFAULT 0
+# endif
+# endif // !_STLP_USE_PTHREAD_SPINLOCK
+
+# elif defined(_STLP_WIN32THREADS)
+# if !defined (_STLP_WINDOWS_H_INCLUDED) && ! defined (_WINDOWS_H)
+# if ! (defined ( _STLP_MSVC ) || defined (__BORLANDC__) || defined (__ICL) || defined (__WATCOMC__) || defined (__MINGW32__) || defined (__DMC__))
+# ifdef _STLP_USE_MFC
+# include <afx.h>
+# else
+# include <windows.h>
+# endif
+# define _STLP_WINDOWS_H_INCLUDED
+# else
+// This section serves as a replacement for windows.h header for Visual C++
+extern "C" {
+# if (defined(_M_MRX000) || defined(_M_ALPHA) \
+ || (defined(_M_PPC) && (_MSC_VER >= 1000))) && !defined(RC_INVOKED)
+# define InterlockedIncrement _InterlockedIncrement
+# define InterlockedDecrement _InterlockedDecrement
+# define InterlockedExchange _InterlockedExchange
+# define _STLP_STDCALL
+# else
+# ifdef _MAC
+# define _STLP_STDCALL _cdecl
+# else
+# define _STLP_STDCALL __stdcall
+# endif
+# endif
+
+#if (_MSC_VER >= 1300) || defined (_STLP_NEW_PLATFORM_SDK)
+_STLP_IMPORT_DECLSPEC long _STLP_STDCALL InterlockedIncrement(long volatile *);
+_STLP_IMPORT_DECLSPEC long _STLP_STDCALL InterlockedDecrement(long volatile *);
+_STLP_IMPORT_DECLSPEC long _STLP_STDCALL InterlockedExchange(long volatile *, long);
+#else
+ // boris : for the latest SDK, you may actually need the other version of the declaration (above)
+ // even for earlier VC++ versions. There is no way to tell SDK versions apart, sorry ...
+_STLP_IMPORT_DECLSPEC long _STLP_STDCALL InterlockedIncrement(long*);
+_STLP_IMPORT_DECLSPEC long _STLP_STDCALL InterlockedDecrement(long*);
+_STLP_IMPORT_DECLSPEC long _STLP_STDCALL InterlockedExchange(long*, long);
+#endif
+
+_STLP_IMPORT_DECLSPEC void _STLP_STDCALL Sleep(unsigned long);
+_STLP_IMPORT_DECLSPEC void _STLP_STDCALL OutputDebugStringA( const char* lpOutputString );
+
+#ifdef _STLP_DEBUG
+typedef unsigned long DWORD;
+_STLP_IMPORT_DECLSPEC DWORD _STLP_STDCALL GetCurrentThreadId();
+#endif /* _STLP_DEBUG */
+
+# if defined (InterlockedIncrement)
+# pragma intrinsic(_InterlockedIncrement)
+# pragma intrinsic(_InterlockedDecrement)
+# pragma intrinsic(_InterlockedExchange)
+# endif
+} /* extern "C" */
+
+# endif /* STL_MSVC */
+
+# define _STLP_WINDOWS_H_INCLUDED
+
+# endif /* _STLP_WIN32 */
+
+# ifndef _STLP_ATOMIC_INCREMENT
+# define _STLP_ATOMIC_INCREMENT(__x) InterlockedIncrement((long*)__x)
+# define _STLP_ATOMIC_DECREMENT(__x) InterlockedDecrement((long*)__x)
+# define _STLP_ATOMIC_EXCHANGE(__x, __y) InterlockedExchange((long*)__x, (long)__y)
+# endif
+# elif defined(__DECC) || defined(__DECCXX)
+# include <machine/builtins.h>
+# define _STLP_ATOMIC_EXCHANGE __ATOMIC_EXCH_LONG
+# define _STLP_ATOMIC_INCREMENT(__x) __ATOMIC_ADD_LONG(__x, 1)
+# define _STLP_ATOMIC_DECREMENT(__x) __ATOMIC_ADD_LONG(__x, -1)
+# elif defined(_STLP_SPARC_SOLARIS_THREADS)
+# include <stl/_sparc_atomic.h>
+# elif defined (_STLP_UITHREADS)
+// this inclusion is potential hazard to bring up all sorts
+// of old-style headers. Let's assume vendor already know how
+// to deal with that.
+# include <ctime>
+# if defined (_STLP_USE_NAMESPACES) && ! defined (_STLP_VENDOR_GLOBAL_CSTD)
+using _STLP_VENDOR_CSTD::time_t;
+# endif
+# include <synch.h>
+# include <cstdio>
+# include <stl/_cwchar.h>
+# elif defined (_STLP_BETHREADS)
+# include <OS.h>
+#include <cassert>
+#include <stdio.h>
+# define _STLP_MUTEX_INITIALIZER = { 0 }
+#elif defined(_STLP_OS2THREADS)
+# ifdef __GNUC__
+# define INCL_DOSSEMAPHORES
+# include <os2.h>
+# else
+ // This section serves to replace os2.h for VisualAge C++
+ typedef unsigned long ULONG;
+ #ifndef __HEV__ /* INCL_SEMAPHORE may also define HEV */
+ #define __HEV__
+ typedef ULONG HEV;
+ typedef HEV* PHEV;
+ #endif
+ typedef ULONG APIRET;
+ typedef ULONG HMTX;
+ typedef HMTX* PHMTX;
+ typedef const char* PCSZ;
+ typedef ULONG BOOL32;
+ APIRET _System DosCreateMutexSem(PCSZ pszName, PHEV phev, ULONG flAttr, BOOL32 fState);
+ APIRET _System DosRequestMutexSem(HMTX hmtx, ULONG ulTimeout);
+ APIRET _System DosReleaseMutexSem(HMTX hmtx);
+ APIRET _System DosCloseMutexSem(HMTX hmtx);
+# define _STLP_MUTEX_INITIALIZER = { 0 };
+# endif /* GNUC */
+# elif defined(_STLP_VXWORKS_THREADS)
+# include "semLib.h"
+# endif
+
+# ifndef _STLP_MUTEX_INITIALIZER
+# if defined(_STLP_ATOMIC_EXCHANGE)
+// we are using our own spinlock.
+# define _STLP_MUTEX_INITIALIZER = { 0 }
+# elif defined(_STLP_UITHREADS)
+// known case
+# define _STLP_MUTEX_INITIALIZER = { DEFAULTMUTEX }
+# else
+// we do not have static initializer available. therefore, on-demand synchronization is needed.
+# define _STLP_MUTEX_INITIALIZER
+# define _STLP_MUTEX_NEEDS_ONDEMAND_INITIALIZATION
+# endif
+# endif
+
+_STLP_BEGIN_NAMESPACE
+
+#ifndef _STLP_USE_PTHREAD_SPINLOCK
+// Helper struct. This is a workaround for various compilers that don't
+// handle static variables in inline functions properly.
+template <int __inst>
+struct _STLP_mutex_spin {
+ enum { __low_max = 30, __high_max = 1000 };
+ // Low if we suspect uniprocessor, high for multiprocessor.
+ static unsigned __max;
+ static unsigned __last;
+ static void _STLP_CALL _M_do_lock(volatile __stl_atomic_t* __lock);
+ static void _STLP_CALL _S_nsec_sleep(int __log_nsec);
+};
+#endif // !_STLP_USE_PTHREAD_SPINLOCK
+
+
+// Locking class. Note that this class *does not have a constructor*.
+// It must be initialized either statically, with _STLP_MUTEX_INITIALIZER,
+// or dynamically, by explicitly calling the _M_initialize member function.
+// (This is similar to the ways that a pthreads mutex can be initialized.)
+// There are explicit member functions for acquiring and releasing the lock.
+
+// There is no constructor because static initialization is essential for
+// some uses, and only a class aggregate (see section 8.5.1 of the C++
+// standard) can be initialized that way. That means we must have no
+// constructors, no base classes, no virtual functions, and no private or
+// protected members.
+
+// For non-static cases, clients should use _STLP_mutex.
+
+struct _STLP_CLASS_DECLSPEC _STLP_mutex_base
+{
+#if defined(_STLP_ATOMIC_EXCHANGE) || defined(_STLP_SGI_THREADS)
+ // It should be relatively easy to get this to work on any modern Unix.
+ volatile __stl_atomic_t _M_lock;
+#endif
+
+#ifdef _STLP_THREADS
+
+# ifdef _STLP_ATOMIC_EXCHANGE
+ inline void _M_initialize() { _M_lock=0; }
+ inline void _M_destroy() {}
+
+ void _M_acquire_lock() {
+ _STLP_mutex_spin<0>::_M_do_lock(&_M_lock);
+ }
+
+ inline void _M_release_lock() {
+ volatile __stl_atomic_t* __lock = &_M_lock;
+# if defined(_STLP_SGI_THREADS) && defined(__GNUC__) && __mips >= 3
+ asm("sync");
+ *__lock = 0;
+# elif defined(_STLP_SGI_THREADS) && __mips >= 3 \
+ && (defined (_ABIN32) || defined(_ABI64))
+ __lock_release(__lock);
+# elif defined (_STLP_SPARC_SOLARIS_THREADS)
+# if defined (__WORD64) || defined (__arch64__) || defined (__sparcv9) || defined (__sparcv8plus)
+ asm("membar #StoreStore ; membar #LoadStore");
+# else
+ asm(" stbar ");
+# endif
+ *__lock = 0;
+# else
+ *__lock = 0;
+ // This is not sufficient on many multiprocessors, since
+ // writes to protected variables and the lock may be reordered.
+# endif
+ }
+# elif defined(_STLP_PTHREADS)
+# ifdef _STLP_USE_PTHREAD_SPINLOCK
+ pthread_spinlock_t _M_lock;
+ inline void _M_initialize() { pthread_spin_init( &_M_lock, 0 ); }
+ inline void _M_destroy() { pthread_spin_destroy( &_M_lock ); }
+
+ inline void _M_acquire_lock() {
+ // we do not care about race conditions here : there is only one thread at this point
+ if(!_M_lock) pthread_spin_init( &_M_lock, 0 );
+
+ // fbp: here, initialization on demand should happen before the lock
+ // we use simple strategy as we are sure this only happens on initialization
+ pthread_spin_lock( &_M_lock );
+ }
+
+ inline void _M_acquire_lock_nodemand() {
+ pthread_spin_lock( &_M_lock );
+ }
+ inline void _M_release_lock() { pthread_spin_unlock( &_M_lock ); }
+# else // !_STLP_USE_PTHREAD_SPINLOCK
+ pthread_mutex_t _M_lock;
+
+ inline void _M_initialize() {
+ pthread_mutex_init(&_M_lock,_STLP_PTHREAD_ATTR_DEFAULT);
+ }
+ inline void _M_destroy() {
+ pthread_mutex_destroy(&_M_lock);
+ }
+ inline void _M_acquire_lock_nodemand() {
+ pthread_mutex_lock(&_M_lock);
+ }
+
+ inline void _M_acquire_lock() {
+# if defined (__hpux) && !defined (PTHREAD_MUTEX_INITIALIZER)
+ if (!_M_lock.field1) _M_initialize();
+# endif
+ pthread_mutex_lock(&_M_lock);
+ }
+ inline void _M_release_lock() { pthread_mutex_unlock(&_M_lock); }
+# endif // !_STLP_USE_PTHREAD_SPINLOCK
+
+# elif defined (_STLP_UITHREADS)
+ mutex_t _M_lock;
+ inline void _M_initialize() {
+ mutex_init(&_M_lock,0,NULL);
+ }
+ inline void _M_destroy() {
+ mutex_destroy(&_M_lock);
+ }
+ inline void _M_acquire_lock() { mutex_lock(&_M_lock); }
+ inline void _M_release_lock() { mutex_unlock(&_M_lock); }
+
+# elif defined(_STLP_OS2THREADS)
+ HMTX _M_lock;
+ inline void _M_initialize() { DosCreateMutexSem(NULL, &_M_lock, 0, false); }
+ inline void _M_destroy() { DosCloseMutexSem(_M_lock); }
+ inline void _M_acquire_lock_nodemand() {
+ DosRequestMutexSem(_M_lock, SEM_INDEFINITE_WAIT);
+ }
+ inline void _M_acquire_lock() {
+ if(!_M_lock) _M_initialize();
+ DosRequestMutexSem(_M_lock, SEM_INDEFINITE_WAIT);
+ }
+ inline void _M_release_lock() { DosReleaseMutexSem(_M_lock); }
+# elif defined(_STLP_BETHREADS)
+ sem_id sem;
+ inline void _M_initialize()
+ {
+ sem = create_sem(1, "STLPort");
+ assert(sem > 0);
+ }
+ inline void _M_destroy()
+ {
+ int t = delete_sem(sem);
+ assert(t == B_NO_ERROR);
+ }
+ inline void _M_acquire_lock_nodemand()
+ {
+ status_t t;
+ t = acquire_sem(sem);
+ assert(t == B_NO_ERROR);
+ }
+ inline void _M_acquire_lock();
+ inline void _M_release_lock()
+ {
+ status_t t = release_sem(sem);
+ assert(t == B_NO_ERROR);
+ }
+# elif defined(_STLP_VXWORKS_THREADS)
+ SEM_ID _M_sem;
+ inline void _M_initialize()
+ {
+ _M_sem = semMCreate(SEM_Q_FIFO);
+ assert(_M_sem > 0);
+ }
+ inline void _M_destroy()
+ {
+ STATUS __s;
+ semDelete (_M_sem);
+ assert(__s == OK);
+ }
+ inline void _M_acquire_lock_nodemand()
+ {
+ STATUS __s;
+ semTake (_M_sem, WAIT_FOREVER);
+ assert(__s == OK);
+ }
+ inline void _M_acquire_lock()
+ {
+ if (!_M_sem)
+ _M_initialize();
+ _M_acquire_lock_nodemand();
+ }
+ inline void _M_release_lock()
+ {
+ STATUS __s;
+ semGive (_M_sem, WAIT_FOREVER);
+ assert(__s == OK);
+ }
+# else //*ty 11/24/2001 - added configuration check
+# error "Unknown thread facility configuration"
+# endif
+#else /* No threads */
+ inline void _M_initialize() {}
+ inline void _M_destroy() {}
+ inline void _M_acquire_lock() {}
+ inline void _M_release_lock() {}
+#endif // _STLP_PTHREADS
+};
+
+
+#if defined (_STLP_THREADS) && defined (_STLP_MUTEX_NEEDS_ONDEMAND_INITIALIZATION)
+// for use in _STLP_mutex, our purposes do not require ondemand initialization
+// also, mutex_base may use some hacks to determine uninitialized state by zero data, which only works for globals.
+class _STLP_CLASS_DECLSPEC _STLP_mutex_nodemand : public _STLP_mutex_base {
+ inline void _M_acquire_lock() {
+ _M_acquire_lock_nodemand();
+ }
+};
+#else
+typedef _STLP_mutex_base _STLP_mutex_nodemand;
+#endif
+
+
+// Locking class. The constructor initializes the lock, the destructor destroys it.
+// Well - behaving class, does not need static initializer
+class _STLP_CLASS_DECLSPEC _STLP_mutex : public _STLP_mutex_nodemand {
+ public:
+ inline _STLP_mutex () { _M_initialize(); }
+ inline ~_STLP_mutex () { _M_destroy(); }
+ private:
+ _STLP_mutex(const _STLP_mutex&);
+ void operator=(const _STLP_mutex&);
+};
+
+
+
+/*
+ * Class _Refcount_Base provides a type, __stl_atomic_t, a data member,
+ * _M_ref_count, and member functions _M_incr and _M_decr, which perform
+ * atomic preincrement/predecrement. The constructor initializes
+ * _M_ref_count.
+ */
+struct _STLP_CLASS_DECLSPEC _Refcount_Base
+{
+ // The data member _M_ref_count
+ volatile __stl_atomic_t _M_ref_count;
+
+# if !defined (_STLP_ATOMIC_EXCHANGE)
+ _STLP_mutex _M_mutex;
+# endif
+
+ // Constructor
+ _Refcount_Base(__stl_atomic_t __n) : _M_ref_count(__n) {}
+
+ // _M_incr and _M_decr
+# if defined (_STLP_THREADS) && defined (_STLP_ATOMIC_EXCHANGE)
+ void _M_incr() { _STLP_ATOMIC_INCREMENT((__stl_atomic_t*)&_M_ref_count); }
+ void _M_decr() { _STLP_ATOMIC_DECREMENT((__stl_atomic_t*)&_M_ref_count); }
+# elif defined(_STLP_THREADS)
+ void _M_incr() {
+ _M_mutex._M_acquire_lock();
+ ++_M_ref_count;
+ _M_mutex._M_release_lock();
+ }
+ void _M_decr() {
+ _M_mutex._M_acquire_lock();
+ --_M_ref_count;
+ _M_mutex._M_release_lock();
+ }
+# else /* No threads */
+ void _M_incr() { ++_M_ref_count; }
+ void _M_decr() { --_M_ref_count; }
+# endif
+};
+
+// Atomic swap on unsigned long
+// This is guaranteed to behave as though it were atomic only if all
+// possibly concurrent updates use _Atomic_swap.
+// In some cases the operation is emulated with a lock.
+# if defined (_STLP_THREADS)
+# ifdef _STLP_ATOMIC_EXCHANGE
+inline __stl_atomic_t _Atomic_swap(volatile __stl_atomic_t * __p, __stl_atomic_t __q) {
+ return (__stl_atomic_t) _STLP_ATOMIC_EXCHANGE(__p,__q);
+}
+# elif defined(_STLP_PTHREADS) || defined (_STLP_UITHREADS) || defined (_STLP_OS2THREADS) || defined(_STLP_USE_PTHREAD_SPINLOCK)
+// We use a template here only to get a unique initialized instance.
+template<int __dummy>
+struct _Swap_lock_struct {
+ static _STLP_STATIC_MUTEX _S_swap_lock;
+};
+
+
+// This should be portable, but performance is expected
+// to be quite awful. This really needs platform specific
+// code.
+inline __stl_atomic_t _Atomic_swap(volatile __stl_atomic_t * __p, __stl_atomic_t __q) {
+ _Swap_lock_struct<0>::_S_swap_lock._M_acquire_lock();
+ __stl_atomic_t __result = *__p;
+ *__p = __q;
+ _Swap_lock_struct<0>::_S_swap_lock._M_release_lock();
+ return __result;
+}
+# endif // _STLP_PTHREADS || _STLP_UITHREADS || _STLP_OS2THREADS || _STLP_USE_PTHREAD_SPINLOCK
+# else // !_STLP_THREADS
+/* no threads */
+static inline __stl_atomic_t _STLP_CALL
+_Atomic_swap(volatile __stl_atomic_t * __p, __stl_atomic_t __q) {
+ __stl_atomic_t __result = *__p;
+ *__p = __q;
+ return __result;
+}
+# endif // _STLP_THREADS
+
+// A locking class that uses _STLP_STATIC_MUTEX. The constructor takes
+// a reference to an _STLP_STATIC_MUTEX, and acquires a lock. The destructor
+// releases the lock.
+
+struct _STLP_CLASS_DECLSPEC _STLP_auto_lock
+{
+ _STLP_STATIC_MUTEX& _M_lock;
+
+ _STLP_auto_lock(_STLP_STATIC_MUTEX& __lock) : _M_lock(__lock)
+ { _M_lock._M_acquire_lock(); }
+ ~_STLP_auto_lock() { _M_lock._M_release_lock(); }
+
+private:
+ void operator=(const _STLP_auto_lock&);
+ _STLP_auto_lock(const _STLP_auto_lock&);
+};
+
+typedef _STLP_auto_lock _STLP_mutex_lock;
+
+#ifdef _STLP_BETHREADS
+
+template <int __inst>
+struct _STLP_beos_static_lock_data
+{
+ static bool is_init;
+ struct mutex_t : public _STLP_mutex
+ {
+ mutex_t()
+ {
+ _STLP_beos_static_lock_data<0>::is_init = true;
+ }
+ ~mutex_t()
+ {
+ _STLP_beos_static_lock_data<0>::is_init = false;
+ }
+ };
+ static mutex_t mut;
+};
+
+template <int __inst>
+bool _STLP_beos_static_lock_data<__inst>::is_init = false;
+template <int __inst>
+typename _STLP_beos_static_lock_data<__inst>::mutex_t _STLP_beos_static_lock_data<__inst>::mut;
+
+
+inline void _STLP_mutex_base::_M_acquire_lock()
+{
+ if(sem == 0)
+ {
+ // we need to initialise on demand here
+ // to prevent race conditions use our global
+ // mutex if it's available:
+ if(_STLP_beos_static_lock_data<0>::is_init)
+ {
+ _STLP_auto_lock al(_STLP_beos_static_lock_data<0>::mut);
+ if(sem == 0) _M_initialize();
+ }
+ else
+ {
+ // no lock available, we must still be
+ // in startup code, THERE MUST BE ONE THREAD
+ // ONLY active at this point.
+ _M_initialize();
+ }
+ }
+ _M_acquire_lock_nodemand();
+}
+
+#endif
+
+_STLP_END_NAMESPACE
+
+# if !defined (_STLP_LINK_TIME_INSTANTIATION)
+# include <stl/_threads.c>
+# endif
+
+#endif /* _STLP_INTERNAL_THREADS_H */
+
+// Local Variables:
+// mode:C++
+// End:
+