author | William Roberts <williamr@symbian.org> |
Fri, 23 Jul 2010 16:09:54 +0100 | |
branch | GCC_SURGE |
changeset 47 | d7383dba13ba |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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/* GLIB - Library of useful routines for C programming |
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
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* Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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|
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/* |
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS |
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* file for a list of people on the GLib Team. See the ChangeLog |
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* files for a list of changes. These files are distributed with |
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* GLib at ftp://ftp.gtk.org/pub/gtk/. |
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*/ |
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|
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#ifndef __G_THREAD_H__ |
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#define __G_THREAD_H__ |
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#include <_ansi.h> |
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#include <glib/gerror.h> |
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#include <glib/gtypes.h> |
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#include <glib/gatomic.h> /* for g_atomic_pointer_get */ |
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G_BEGIN_DECLS |
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/* GLib Thread support |
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*/ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C GQuark g_thread_error_quark (void); |
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#else |
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extern GQuark g_thread_error_quark (void); |
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#endif /* __SYMBIAN32__ */ |
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#define G_THREAD_ERROR g_thread_error_quark () |
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typedef enum |
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{ |
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G_THREAD_ERROR_AGAIN /* Resource temporarily unavailable */ |
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} GThreadError; |
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typedef gpointer (*GThreadFunc) (gpointer data); |
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typedef enum |
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{ |
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G_THREAD_PRIORITY_LOW, |
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G_THREAD_PRIORITY_NORMAL, |
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G_THREAD_PRIORITY_HIGH, |
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G_THREAD_PRIORITY_URGENT |
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} GThreadPriority; |
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typedef struct _GThread GThread; |
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struct _GThread |
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{ |
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/*< private >*/ |
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GThreadFunc func; |
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gpointer data; |
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gboolean joinable; |
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GThreadPriority priority; |
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}; |
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typedef struct _GMutex GMutex; |
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typedef struct _GCond GCond; |
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typedef struct _GPrivate GPrivate; |
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typedef struct _GStaticPrivate GStaticPrivate; |
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typedef struct _GThreadFunctions GThreadFunctions; |
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struct _GThreadFunctions |
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{ |
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GMutex* (*mutex_new) (void); |
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void (*mutex_lock) (GMutex *mutex); |
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gboolean (*mutex_trylock) (GMutex *mutex); |
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void (*mutex_unlock) (GMutex *mutex); |
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void (*mutex_free) (GMutex *mutex); |
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GCond* (*cond_new) (void); |
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void (*cond_signal) (GCond *cond); |
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void (*cond_broadcast) (GCond *cond); |
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void (*cond_wait) (GCond *cond, |
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GMutex *mutex); |
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gboolean (*cond_timed_wait) (GCond *cond, |
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GMutex *mutex, |
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GTimeVal *end_time); |
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void (*cond_free) (GCond *cond); |
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GPrivate* (*private_new) (GDestroyNotify destructor); |
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gpointer (*private_get) (GPrivate *private_key); |
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void (*private_set) (GPrivate *private_key, |
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gpointer data); |
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void (*thread_create) (GThreadFunc func, |
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gpointer data, |
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gulong stack_size, |
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gboolean joinable, |
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gboolean bound, |
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GThreadPriority priority, |
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gpointer thread, |
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GError **error); |
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void (*thread_yield) (void); |
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void (*thread_join) (gpointer thread); |
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void (*thread_exit) (void); |
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void (*thread_set_priority)(gpointer thread, |
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GThreadPriority priority); |
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void (*thread_self) (gpointer thread); |
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gboolean (*thread_equal) (gpointer thread1, |
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gpointer thread2); |
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}; |
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|
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#ifdef __SYMBIAN32__ |
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IMPORT_C GThreadFunctions *_g_thread_functions_for_glib_use(); |
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#endif /* __SYMBIAN32__ */ |
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GLIB_VAR GThreadFunctions g_thread_functions_for_glib_use; |
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|
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#ifdef __SYMBIAN32__ |
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IMPORT_C gboolean *_g_thread_use_default_impl(); |
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#endif /* __SYMBIAN32__ */ |
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GLIB_VAR gboolean g_thread_use_default_impl; |
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|
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#ifdef __SYMBIAN32__ |
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IMPORT_C gboolean *_g_threads_got_initialized(); |
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#endif /* __SYMBIAN32__ */ |
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GLIB_VAR gboolean g_threads_got_initialized; |
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|
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/* initializes the mutex/cond/private implementation for glib, might |
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* only be called once, and must not be called directly or indirectly |
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* from another glib-function, e.g. as a callback. |
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*/ |
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IMPORT_C void g_thread_init (GThreadFunctions *vtable); |
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|
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#ifdef __SYMBIAN32__ |
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IMPORT_C gboolean g_thread_supported(); |
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#else |
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#define g_thread_supported() (g_threads_got_initialized) |
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#endif |
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|
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/* Errorcheck mutexes. If you define G_ERRORCHECK_MUTEXES, then all |
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* mutexes will check for re-locking and re-unlocking */ |
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|
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/* Initialize thread system with errorcheck mutexes. vtable must be |
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* NULL. Do not call directly. Use #define G_ERRORCHECK_MUTEXES |
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* instead. |
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*/ |
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IMPORT_C void g_thread_init_with_errorcheck_mutexes (GThreadFunctions* vtable); |
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|
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/* A random number to recognize debug calls to g_mutex_... */ |
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#define G_MUTEX_DEBUG_MAGIC 0xf8e18ad7 |
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|
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#ifdef G_ERRORCHECK_MUTEXES |
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#define g_thread_init(vtable) g_thread_init_with_errorcheck_mutexes (vtable) |
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#endif |
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|
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/* internal function for fallback static mutex implementation */ |
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IMPORT_C GMutex* g_static_mutex_get_mutex_impl (GMutex **mutex); |
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|
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#define g_static_mutex_get_mutex_impl_shortcut(mutex) \ |
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(g_atomic_pointer_get ((gpointer*)(void*)mutex) ? *(mutex) : \ |
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g_static_mutex_get_mutex_impl (mutex)) |
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165 |
|
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/* shorthands for conditional and unconditional function calls */ |
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|
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#define G_THREAD_UF(op, arglist) \ |
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(*g_thread_functions_for_glib_use . op) arglist |
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#define G_THREAD_CF(op, fail, arg) \ |
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(g_thread_supported () ? G_THREAD_UF (op, arg) : (fail)) |
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#define G_THREAD_ECF(op, fail, mutex, type) \ |
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(g_thread_supported () ? ((type(*)(GMutex*, gulong, gchar*)) \ |
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(*g_thread_functions_for_glib_use . op)) \ |
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(mutex, G_MUTEX_DEBUG_MAGIC, G_STRLOC) : (fail)) |
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|
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#ifndef G_ERRORCHECK_MUTEXES |
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# define g_mutex_lock(mutex) \ |
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G_THREAD_CF (mutex_lock, (void)0, (mutex)) |
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# define g_mutex_trylock(mutex) \ |
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G_THREAD_CF (mutex_trylock, TRUE, (mutex)) |
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# define g_mutex_unlock(mutex) \ |
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G_THREAD_CF (mutex_unlock, (void)0, (mutex)) |
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# define g_mutex_free(mutex) \ |
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G_THREAD_CF (mutex_free, (void)0, (mutex)) |
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# define g_cond_wait(cond, mutex) \ |
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G_THREAD_CF (cond_wait, (void)0, (cond, mutex)) |
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# define g_cond_timed_wait(cond, mutex, abs_time) \ |
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G_THREAD_CF (cond_timed_wait, TRUE, (cond, mutex, abs_time)) |
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#else /* G_ERRORCHECK_MUTEXES */ |
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# define g_mutex_lock(mutex) \ |
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G_THREAD_ECF (mutex_lock, (void)0, (mutex), void) |
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# define g_mutex_trylock(mutex) \ |
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G_THREAD_ECF (mutex_trylock, TRUE, (mutex), gboolean) |
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# define g_mutex_unlock(mutex) \ |
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G_THREAD_ECF (mutex_unlock, (void)0, (mutex), void) |
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# define g_mutex_free(mutex) \ |
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G_THREAD_ECF (mutex_free, (void)0, (mutex), void) |
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# define g_cond_wait(cond, mutex) \ |
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(g_thread_supported () ? ((void(*)(GCond*, GMutex*, gulong, gchar*))\ |
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g_thread_functions_for_glib_use.cond_wait) \ |
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(cond, mutex, G_MUTEX_DEBUG_MAGIC, G_STRLOC) : (void) 0) |
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# define g_cond_timed_wait(cond, mutex, abs_time) \ |
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(g_thread_supported () ? \ |
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((gboolean(*)(GCond*, GMutex*, GTimeVal*, gulong, gchar*)) \ |
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g_thread_functions_for_glib_use.cond_timed_wait) \ |
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(cond, mutex, abs_time, G_MUTEX_DEBUG_MAGIC, G_STRLOC) : TRUE) |
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#endif /* G_ERRORCHECK_MUTEXES */ |
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|
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#define g_mutex_new() G_THREAD_UF (mutex_new, ()) |
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#define g_cond_new() G_THREAD_UF (cond_new, ()) |
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#define g_cond_signal(cond) G_THREAD_CF (cond_signal, (void)0, (cond)) |
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#define g_cond_broadcast(cond) G_THREAD_CF (cond_broadcast, (void)0, (cond)) |
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#define g_cond_free(cond) G_THREAD_CF (cond_free, (void)0, (cond)) |
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#define g_private_new(destructor) G_THREAD_UF (private_new, (destructor)) |
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#define g_private_get(private_key) G_THREAD_CF (private_get, \ |
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((gpointer)private_key), \ |
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(private_key)) |
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#define g_private_set(private_key, value) G_THREAD_CF (private_set, \ |
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(void) (private_key = \ |
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(GPrivate*) (value)), \ |
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(private_key, value)) |
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#define g_thread_yield() G_THREAD_CF (thread_yield, (void)0, ()) |
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|
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#define g_thread_create(func, data, joinable, error) \ |
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(g_thread_create_full (func, data, 0, joinable, FALSE, \ |
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G_THREAD_PRIORITY_NORMAL, error)) |
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|
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IMPORT_C GThread* g_thread_create_full (GThreadFunc func, |
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gpointer data, |
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gulong stack_size, |
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gboolean joinable, |
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gboolean bound, |
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GThreadPriority priority, |
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GError **error); |
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IMPORT_C GThread* g_thread_self (void); |
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IMPORT_C void g_thread_exit (gpointer retval); |
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IMPORT_C gpointer g_thread_join (GThread *thread); |
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|
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IMPORT_C void g_thread_set_priority (GThread *thread, |
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GThreadPriority priority); |
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|
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/* GStaticMutexes can be statically initialized with the value |
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* G_STATIC_MUTEX_INIT, and then they can directly be used, that is |
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* much easier, than having to explicitly allocate the mutex before |
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* use |
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*/ |
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#define g_static_mutex_lock(mutex) \ |
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g_mutex_lock (g_static_mutex_get_mutex (mutex)) |
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#define g_static_mutex_trylock(mutex) \ |
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g_mutex_trylock (g_static_mutex_get_mutex (mutex)) |
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#define g_static_mutex_unlock(mutex) \ |
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g_mutex_unlock (g_static_mutex_get_mutex (mutex)) |
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IMPORT_C void g_static_mutex_init (GStaticMutex *mutex); |
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IMPORT_C void g_static_mutex_free (GStaticMutex *mutex); |
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|
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struct _GStaticPrivate |
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{ |
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/*< private >*/ |
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guint index; |
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}; |
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#define G_STATIC_PRIVATE_INIT { 0 } |
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IMPORT_C void g_static_private_init (GStaticPrivate *private_key); |
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IMPORT_C gpointer g_static_private_get (GStaticPrivate *private_key); |
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IMPORT_C void g_static_private_set (GStaticPrivate *private_key, |
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gpointer data, |
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GDestroyNotify notify); |
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IMPORT_C void g_static_private_free (GStaticPrivate *private_key); |
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|
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typedef struct _GStaticRecMutex GStaticRecMutex; |
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struct _GStaticRecMutex |
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{ |
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/*< private >*/ |
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GStaticMutex mutex; |
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guint depth; |
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GSystemThread owner; |
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}; |
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|
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#define G_STATIC_REC_MUTEX_INIT { G_STATIC_MUTEX_INIT } |
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IMPORT_C void g_static_rec_mutex_init (GStaticRecMutex *mutex); |
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IMPORT_C void g_static_rec_mutex_lock (GStaticRecMutex *mutex); |
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IMPORT_C gboolean g_static_rec_mutex_trylock (GStaticRecMutex *mutex); |
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IMPORT_C void g_static_rec_mutex_unlock (GStaticRecMutex *mutex); |
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IMPORT_C void g_static_rec_mutex_lock_full (GStaticRecMutex *mutex, |
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guint depth); |
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IMPORT_C guint g_static_rec_mutex_unlock_full (GStaticRecMutex *mutex); |
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IMPORT_C void g_static_rec_mutex_free (GStaticRecMutex *mutex); |
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|
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typedef struct _GStaticRWLock GStaticRWLock; |
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struct _GStaticRWLock |
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{ |
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/*< private >*/ |
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GStaticMutex mutex; |
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GCond *read_cond; |
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GCond *write_cond; |
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guint read_counter; |
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gboolean have_writer; |
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guint want_to_read; |
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guint want_to_write; |
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}; |
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|
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#define G_STATIC_RW_LOCK_INIT { G_STATIC_MUTEX_INIT, NULL, NULL, 0, FALSE, 0, 0 } |
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|
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IMPORT_C void g_static_rw_lock_init (GStaticRWLock* lock); |
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IMPORT_C void g_static_rw_lock_reader_lock (GStaticRWLock* lock); |
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IMPORT_C gboolean g_static_rw_lock_reader_trylock (GStaticRWLock* lock); |
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IMPORT_C void g_static_rw_lock_reader_unlock (GStaticRWLock* lock); |
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IMPORT_C void g_static_rw_lock_writer_lock (GStaticRWLock* lock); |
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IMPORT_C gboolean g_static_rw_lock_writer_trylock (GStaticRWLock* lock); |
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IMPORT_C void g_static_rw_lock_writer_unlock (GStaticRWLock* lock); |
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IMPORT_C void g_static_rw_lock_free (GStaticRWLock* lock); |
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|
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IMPORT_C void g_thread_foreach (GFunc thread_func, |
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gpointer user_data); |
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315 |
|
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typedef enum |
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{ |
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G_ONCE_STATUS_NOTCALLED, |
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G_ONCE_STATUS_PROGRESS, |
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G_ONCE_STATUS_READY |
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} GOnceStatus; |
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|
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typedef struct _GOnce GOnce; |
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struct _GOnce |
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{ |
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volatile GOnceStatus status; |
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volatile gpointer retval; |
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}; |
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|
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#define G_ONCE_INIT { G_ONCE_STATUS_NOTCALLED, NULL } |
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|
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IMPORT_C gpointer g_once_impl (GOnce *once, GThreadFunc func, gpointer arg); |
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|
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#ifdef G_ATOMIC_OP_MEMORY_BARRIER_NEEDED |
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# define g_once(once, func, arg) g_once_impl ((once), (func), (arg)) |
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#else /* !G_ATOMIC_OP_MEMORY_BARRIER_NEEDED*/ |
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# define g_once(once, func, arg) \ |
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(((once)->status == G_ONCE_STATUS_READY) ? \ |
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(once)->retval : \ |
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g_once_impl ((once), (func), (arg))) |
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#endif /* G_ATOMIC_OP_MEMORY_BARRIER_NEEDED */ |
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342 |
|
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/* these are some convenience macros that expand to nothing if GLib |
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* was configured with --disable-threads. for using StaticMutexes, |
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* you define them with G_LOCK_DEFINE_STATIC (name) or G_LOCK_DEFINE (name) |
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* if you need to export the mutex. With G_LOCK_EXTERN (name) you can |
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* declare such an globally defined lock. name is a unique identifier |
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* for the protected varibale or code portion. locking, testing and |
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* unlocking of such mutexes can be done with G_LOCK(), G_UNLOCK() and |
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* G_TRYLOCK() respectively. |
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*/ |
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#ifdef __SYMBIAN32__ |
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#ifdef G_DEBUG_LOCKS |
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#undef G_DEBUG_LOCKS |
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#endif //G_DEBUG_LOCKS |
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#endif //__SYMBIAN32__ |
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|
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extern void glib_dummy_decl (void); |
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#define G_LOCK_NAME(name) g__ ## name ## _lock |
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#ifdef G_THREADS_ENABLED |
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# define G_LOCK_DEFINE_STATIC(name) static G_LOCK_DEFINE (name) |
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# define G_LOCK_DEFINE(name) \ |
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GStaticMutex G_LOCK_NAME (name) = G_STATIC_MUTEX_INIT |
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# define G_LOCK_EXTERN(name) extern GStaticMutex G_LOCK_NAME (name) |
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|
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# ifdef G_DEBUG_LOCKS |
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# define G_LOCK(name) G_STMT_START{ \ |
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g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \ |
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"file %s: line %d (%s): locking: %s ", \ |
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__FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \ |
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#name); \ |
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g_static_mutex_lock (&G_LOCK_NAME (name)); \ |
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}G_STMT_END |
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# define G_UNLOCK(name) G_STMT_START{ \ |
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g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \ |
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"file %s: line %d (%s): unlocking: %s ", \ |
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__FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \ |
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#name); \ |
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g_static_mutex_unlock (&G_LOCK_NAME (name)); \ |
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}G_STMT_END |
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# define G_TRYLOCK(name) \ |
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(g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, \ |
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"file %s: line %d (%s): try locking: %s ", \ |
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__FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \ |
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#name), g_static_mutex_trylock (&G_LOCK_NAME (name))) |
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# else /* !G_DEBUG_LOCKS */ |
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# define G_LOCK(name) g_static_mutex_lock (&G_LOCK_NAME (name)) |
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# define G_UNLOCK(name) g_static_mutex_unlock (&G_LOCK_NAME (name)) |
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# define G_TRYLOCK(name) g_static_mutex_trylock (&G_LOCK_NAME (name)) |
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# endif /* !G_DEBUG_LOCKS */ |
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#else /* !G_THREADS_ENABLED */ |
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# define G_LOCK_DEFINE_STATIC(name) extern void glib_dummy_decl (void) |
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# define G_LOCK_DEFINE(name) extern void glib_dummy_decl (void) |
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# define G_LOCK_EXTERN(name) extern void glib_dummy_decl (void) |
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# define G_LOCK(name) |
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# define G_UNLOCK(name) |
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# define G_TRYLOCK(name) (TRUE) |
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#endif /* !G_THREADS_ENABLED */ |
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399 |
|
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400 |
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G_END_DECLS |
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#endif /* __G_THREAD_H__ */ |
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