| /* GLIB - Library of useful routines for C programming |
| * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
| * |
| * gmutex.c: MT safety related functions |
| * Copyright 1998 Sebastian Wilhelmi; University of Karlsruhe |
| * Owen Taylor |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| * Modified by the GLib Team and others 1997-2000. See the AUTHORS |
| * file for a list of people on the GLib Team. See the ChangeLog |
| * files for a list of changes. These files are distributed with |
| * GLib at ftp://ftp.gtk.org/pub/gtk/. |
| */ |
| |
| /* |
| * MT safe |
| */ |
| |
| #include "config.h" |
| #include "glib.h" |
| |
| #ifdef G_THREAD_USE_PID_SURROGATE |
| #include <sys/types.h> |
| #include <sys/time.h> |
| #include <sys/resource.h> |
| #include <errno.h> |
| #endif /* G_THREAD_USE_PID_SURROGATE */ |
| |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| #include <string.h> |
| |
| #if GLIB_SIZEOF_SYSTEM_THREAD == SIZEOF_VOID_P |
| # define g_system_thread_equal(thread1, thread2) \ |
| (thread1.dummy_pointer == thread2.dummy_pointer) |
| # define g_system_thread_assign(dest, src) \ |
| (dest.dummy_pointer = src.dummy_pointer) |
| #else /* GLIB_SIZEOF_SYSTEM_THREAD != SIZEOF_VOID_P */ |
| # define g_system_thread_equal(thread1, thread2) \ |
| (memcmp (&thread1, &thread2, GLIB_SIZEOF_SYSTEM_THREAD) == 0) |
| # define g_system_thread_assign(dest, src) \ |
| (memcpy (&dest, &src, GLIB_SIZEOF_SYSTEM_THREAD)) |
| #endif /* GLIB_SIZEOF_SYSTEM_THREAD == SIZEOF_VOID_P */ |
| |
| GQuark |
| g_thread_error_quark (void) |
| { |
| static GQuark quark; |
| if (!quark) |
| quark = g_quark_from_static_string ("g_thread_error"); |
| return quark; |
| } |
| |
| /* Keep this in sync with GRealThread in gmain.c! */ |
| typedef struct _GRealThread GRealThread; |
| struct _GRealThread |
| { |
| GThread thread; |
| GThreadFunc func; |
| gpointer arg; |
| gpointer private_data; |
| GMainContext *context; |
| GSystemThread system_thread; |
| #ifdef G_THREAD_USE_PID_SURROGATE |
| pid_t pid; |
| #endif /* G_THREAD_USE_PID_SURROGATE */ |
| }; |
| |
| #ifdef G_THREAD_USE_PID_SURROGATE |
| static gint priority_map[] = { 15, 0, -15, -20 }; |
| static gboolean prio_warned = FALSE; |
| # define SET_PRIO(pid, prio) G_STMT_START{ \ |
| gint error = setpriority (PRIO_PROCESS, (pid), priority_map[prio]); \ |
| if (error == -1 && errno == EACCES && !prio_warned) \ |
| { \ |
| prio_warned = TRUE; \ |
| g_warning ("Priorities can only be increased by root."); \ |
| } \ |
| }G_STMT_END |
| #endif /* G_THREAD_USE_PID_SURROGATE */ |
| |
| typedef struct _GStaticPrivateNode GStaticPrivateNode; |
| struct _GStaticPrivateNode |
| { |
| gpointer data; |
| GDestroyNotify destroy; |
| }; |
| |
| static void g_thread_cleanup (gpointer data); |
| static void g_thread_fail (void); |
| |
| /* Global variables */ |
| |
| static GSystemThread zero_thread; /* This is initialized to all zero */ |
| gboolean g_thread_use_default_impl = TRUE; |
| gboolean g_threads_got_initialized = FALSE; |
| |
| #if defined(G_PLATFORM_WIN32) && defined(__GNUC__) |
| __declspec(dllexport) |
| #endif |
| GThreadFunctions g_thread_functions_for_glib_use = { |
| (GMutex*(*)())g_thread_fail, /* mutex_new */ |
| NULL, /* mutex_lock */ |
| NULL, /* mutex_trylock */ |
| NULL, /* mutex_unlock */ |
| NULL, /* mutex_free */ |
| (GCond*(*)())g_thread_fail, /* cond_new */ |
| NULL, /* cond_signal */ |
| NULL, /* cond_broadcast */ |
| NULL, /* cond_wait */ |
| NULL, /* cond_timed_wait */ |
| NULL, /* cond_free */ |
| (GPrivate*(*)(GDestroyNotify))g_thread_fail, /* private_new */ |
| NULL, /* private_get */ |
| NULL, /* private_set */ |
| (void(*)(GThreadFunc, gpointer, gulong, |
| gboolean, gboolean, GThreadPriority, |
| gpointer, GError**))g_thread_fail, /* thread_create */ |
| NULL, /* thread_yield */ |
| NULL, /* thread_join */ |
| NULL, /* thread_exit */ |
| NULL, /* thread_set_priority */ |
| NULL /* thread_self */ |
| }; |
| |
| /* Local data */ |
| |
| static GMutex *g_mutex_protect_static_mutex_allocation = NULL; |
| static GPrivate *g_thread_specific_private = NULL; |
| static GSList *g_thread_all_threads = NULL; |
| static GSList *g_thread_free_indeces = NULL; |
| |
| G_LOCK_DEFINE_STATIC (g_thread); |
| |
| /* This must be called only once, before any threads are created. |
| * It will only be called from g_thread_init() in -lgthread. |
| */ |
| void |
| g_mutex_init (void) |
| { |
| GRealThread* main_thread; |
| |
| /* We let the main thread (the one that calls g_thread_init) inherit |
| * the data, that it set before calling g_thread_init |
| */ |
| main_thread = (GRealThread*) g_thread_self (); |
| |
| g_thread_specific_private = g_private_new (g_thread_cleanup); |
| G_THREAD_UF (private_set, (g_thread_specific_private, main_thread)); |
| G_THREAD_UF (thread_self, (&main_thread->system_thread)); |
| |
| g_mutex_protect_static_mutex_allocation = g_mutex_new (); |
| } |
| |
| void |
| g_static_mutex_init (GStaticMutex *mutex) |
| { |
| static GStaticMutex init_mutex = G_STATIC_MUTEX_INIT; |
| |
| g_return_if_fail (mutex); |
| |
| memcpy (mutex, &init_mutex, sizeof (GStaticMutex)); |
| } |
| |
| GMutex * |
| g_static_mutex_get_mutex_impl (GMutex** mutex) |
| { |
| if (!g_thread_supported ()) |
| return NULL; |
| |
| g_assert (g_mutex_protect_static_mutex_allocation); |
| |
| g_mutex_lock (g_mutex_protect_static_mutex_allocation); |
| |
| if (!(*mutex)) |
| *mutex = g_mutex_new (); |
| |
| g_mutex_unlock (g_mutex_protect_static_mutex_allocation); |
| |
| return *mutex; |
| } |
| |
| void |
| g_static_mutex_free (GStaticMutex* mutex) |
| { |
| GMutex **runtime_mutex; |
| |
| g_return_if_fail (mutex); |
| |
| /* The runtime_mutex is the first (or only) member of GStaticMutex, |
| * see both versions (of glibconfig.h) in configure.in */ |
| runtime_mutex = ((GMutex**)mutex); |
| |
| if (*runtime_mutex) |
| g_mutex_free (*runtime_mutex); |
| |
| *runtime_mutex = NULL; |
| } |
| |
| void |
| g_static_rec_mutex_init (GStaticRecMutex *mutex) |
| { |
| static GStaticRecMutex init_mutex = G_STATIC_REC_MUTEX_INIT; |
| |
| g_return_if_fail (mutex); |
| |
| memcpy (mutex, &init_mutex, sizeof (GStaticRecMutex)); |
| } |
| |
| void |
| g_static_rec_mutex_lock (GStaticRecMutex* mutex) |
| { |
| GSystemThread self; |
| |
| g_return_if_fail (mutex); |
| |
| if (!g_thread_supported ()) |
| return; |
| |
| G_THREAD_UF (thread_self, (&self)); |
| |
| if (g_system_thread_equal (self, mutex->owner)) |
| { |
| mutex->depth++; |
| return; |
| } |
| g_static_mutex_lock (&mutex->mutex); |
| g_system_thread_assign (mutex->owner, self); |
| mutex->depth = 1; |
| } |
| |
| gboolean |
| g_static_rec_mutex_trylock (GStaticRecMutex* mutex) |
| { |
| GSystemThread self; |
| |
| g_return_val_if_fail (mutex, FALSE); |
| |
| if (!g_thread_supported ()) |
| return TRUE; |
| |
| G_THREAD_UF (thread_self, (&self)); |
| |
| if (g_system_thread_equal (self, mutex->owner)) |
| { |
| mutex->depth++; |
| return TRUE; |
| } |
| |
| if (!g_static_mutex_trylock (&mutex->mutex)) |
| return FALSE; |
| |
| g_system_thread_assign (mutex->owner, self); |
| mutex->depth = 1; |
| return TRUE; |
| } |
| |
| void |
| g_static_rec_mutex_unlock (GStaticRecMutex* mutex) |
| { |
| g_return_if_fail (mutex); |
| |
| if (!g_thread_supported ()) |
| return; |
| |
| if (mutex->depth > 1) |
| { |
| mutex->depth--; |
| return; |
| } |
| g_system_thread_assign (mutex->owner, zero_thread); |
| g_static_mutex_unlock (&mutex->mutex); |
| } |
| |
| void |
| g_static_rec_mutex_lock_full (GStaticRecMutex *mutex, |
| guint depth) |
| { |
| GSystemThread self; |
| g_return_if_fail (mutex); |
| |
| if (!g_thread_supported ()) |
| return; |
| |
| G_THREAD_UF (thread_self, (&self)); |
| |
| if (g_system_thread_equal (self, mutex->owner)) |
| { |
| mutex->depth += depth; |
| return; |
| } |
| g_static_mutex_lock (&mutex->mutex); |
| g_system_thread_assign (mutex->owner, self); |
| mutex->depth = depth; |
| } |
| |
| guint |
| g_static_rec_mutex_unlock_full (GStaticRecMutex *mutex) |
| { |
| gint depth; |
| |
| g_return_val_if_fail (mutex, 0); |
| |
| if (!g_thread_supported ()) |
| return 1; |
| |
| depth = mutex->depth; |
| |
| g_system_thread_assign (mutex->owner, zero_thread); |
| mutex->depth = 0; |
| g_static_mutex_unlock (&mutex->mutex); |
| |
| return depth; |
| } |
| |
| void |
| g_static_rec_mutex_free (GStaticRecMutex *mutex) |
| { |
| g_return_if_fail (mutex); |
| |
| g_static_mutex_free (&mutex->mutex); |
| } |
| |
| void |
| g_static_private_init (GStaticPrivate *private_key) |
| { |
| private_key->index = 0; |
| } |
| |
| gpointer |
| g_static_private_get (GStaticPrivate *private_key) |
| { |
| GRealThread *self = (GRealThread*) g_thread_self (); |
| GArray *array; |
| |
| array = self->private_data; |
| if (!array) |
| return NULL; |
| |
| if (!private_key->index) |
| return NULL; |
| else if (private_key->index <= array->len) |
| return g_array_index (array, GStaticPrivateNode, |
| private_key->index - 1).data; |
| else |
| return NULL; |
| } |
| |
| void |
| g_static_private_set (GStaticPrivate *private_key, |
| gpointer data, |
| GDestroyNotify notify) |
| { |
| GRealThread *self = (GRealThread*) g_thread_self (); |
| GArray *array; |
| static guint next_index = 0; |
| GStaticPrivateNode *node; |
| |
| array = self->private_data; |
| if (!array) |
| { |
| array = g_array_new (FALSE, TRUE, sizeof (GStaticPrivateNode)); |
| self->private_data = array; |
| } |
| |
| if (!private_key->index) |
| { |
| G_LOCK (g_thread); |
| |
| if (!private_key->index) |
| { |
| if (g_thread_free_indeces) |
| { |
| private_key->index = |
| GPOINTER_TO_UINT (g_thread_free_indeces->data); |
| g_thread_free_indeces = |
| g_slist_delete_link (g_thread_free_indeces, |
| g_thread_free_indeces); |
| } |
| else |
| private_key->index = ++next_index; |
| } |
| |
| G_UNLOCK (g_thread); |
| } |
| |
| if (private_key->index > array->len) |
| g_array_set_size (array, private_key->index); |
| |
| node = &g_array_index (array, GStaticPrivateNode, private_key->index - 1); |
| if (node->destroy) |
| { |
| gpointer ddata = node->data; |
| GDestroyNotify ddestroy = node->destroy; |
| |
| node->data = data; |
| node->destroy = notify; |
| |
| ddestroy (ddata); |
| } |
| else |
| { |
| node->data = data; |
| node->destroy = notify; |
| } |
| } |
| |
| void |
| g_static_private_free (GStaticPrivate *private_key) |
| { |
| guint index = private_key->index; |
| GSList *list; |
| |
| if (!index) |
| return; |
| |
| private_key->index = 0; |
| |
| G_LOCK (g_thread); |
| list = g_thread_all_threads; |
| while (list) |
| { |
| GRealThread *thread = list->data; |
| GArray *array = thread->private_data; |
| list = list->next; |
| |
| if (array && index <= array->len) |
| { |
| GStaticPrivateNode *node = &g_array_index (array, |
| GStaticPrivateNode, |
| index - 1); |
| gpointer ddata = node->data; |
| GDestroyNotify ddestroy = node->destroy; |
| |
| node->data = NULL; |
| node->destroy = NULL; |
| |
| if (ddestroy) |
| { |
| G_UNLOCK (g_thread); |
| ddestroy (ddata); |
| G_LOCK (g_thread); |
| } |
| } |
| } |
| g_thread_free_indeces = g_slist_prepend (g_thread_free_indeces, |
| GUINT_TO_POINTER (index)); |
| G_UNLOCK (g_thread); |
| } |
| |
| void g_main_context_destroy (GMainContext *context); |
| |
| static void |
| g_thread_cleanup (gpointer data) |
| { |
| if (data) |
| { |
| GRealThread* thread = data; |
| if (thread->private_data) |
| { |
| GArray* array = thread->private_data; |
| guint i; |
| |
| for (i = 0; i < array->len; i++ ) |
| { |
| GStaticPrivateNode *node = |
| &g_array_index (array, GStaticPrivateNode, i); |
| if (node->destroy) |
| node->destroy (node->data); |
| } |
| g_array_free (array, TRUE); |
| } |
| if (thread->context) |
| g_main_context_destroy (thread->context); |
| |
| /* We only free the thread structure, if it isn't joinable. If |
| it is, the structure is freed in g_thread_join */ |
| if (!thread->thread.joinable) |
| { |
| G_LOCK (g_thread); |
| g_thread_all_threads = g_slist_remove (g_thread_all_threads, data); |
| G_UNLOCK (g_thread); |
| |
| /* Just to make sure, this isn't used any more */ |
| g_system_thread_assign (thread->system_thread, zero_thread); |
| g_free (thread); |
| } |
| } |
| } |
| |
| static void |
| g_thread_fail (void) |
| { |
| g_error ("The thread system is not yet initialized."); |
| } |
| |
| static void |
| g_thread_create_proxy (gpointer data) |
| { |
| GRealThread* thread = data; |
| |
| g_assert (data); |
| |
| #ifdef G_THREAD_USE_PID_SURROGATE |
| thread->pid = getpid (); |
| #endif /* G_THREAD_USE_PID_SURROGATE */ |
| |
| /* This has to happen before G_LOCK, as that might call g_thread_self */ |
| g_private_set (g_thread_specific_private, data); |
| |
| /* the lock makes sure, that thread->system_thread is written, |
| before thread->func is called. See g_thread_create. */ |
| G_LOCK (g_thread); |
| G_UNLOCK (g_thread); |
| |
| #ifdef G_THREAD_USE_PID_SURROGATE |
| if (g_thread_use_default_impl) |
| SET_PRIO (thread->pid, thread->thread.priority); |
| #endif /* G_THREAD_USE_PID_SURROGATE */ |
| |
| thread->func (thread->arg); |
| } |
| |
| GThread* |
| g_thread_create (GThreadFunc thread_func, |
| gpointer arg, |
| gulong stack_size, |
| gboolean joinable, |
| gboolean bound, |
| GThreadPriority priority, |
| GError **error) |
| { |
| GRealThread* result = g_new (GRealThread, 1); |
| GError *local_error = NULL; |
| g_return_val_if_fail (thread_func, NULL); |
| g_return_val_if_fail (priority >= G_THREAD_PRIORITY_LOW, NULL); |
| g_return_val_if_fail (priority <= G_THREAD_PRIORITY_URGENT, NULL); |
| |
| result->thread.joinable = joinable; |
| result->thread.bound = bound; |
| result->thread.priority = priority; |
| result->func = thread_func; |
| result->arg = arg; |
| result->private_data = NULL; |
| result->context = NULL; |
| G_LOCK (g_thread); |
| G_THREAD_UF (thread_create, (g_thread_create_proxy, result, |
| stack_size, joinable, bound, priority, |
| &result->system_thread, &local_error)); |
| g_thread_all_threads = g_slist_prepend (g_thread_all_threads, result); |
| G_UNLOCK (g_thread); |
| |
| if (local_error) |
| { |
| g_propagate_error (error, local_error); |
| g_free (result); |
| return NULL; |
| } |
| |
| return (GThread*) result; |
| } |
| |
| void |
| g_thread_join (GThread* thread) |
| { |
| GRealThread* real = (GRealThread*) thread; |
| |
| |
| g_return_if_fail (thread); |
| g_return_if_fail (thread->joinable); |
| g_return_if_fail (!g_system_thread_equal (real->system_thread, zero_thread)); |
| |
| G_THREAD_UF (thread_join, (&real->system_thread)); |
| |
| G_LOCK (g_thread); |
| g_thread_all_threads = g_slist_remove (g_thread_all_threads, thread); |
| G_UNLOCK (g_thread); |
| |
| /* Just to make sure, this isn't used any more */ |
| thread->joinable = 0; |
| g_system_thread_assign (real->system_thread, zero_thread); |
| |
| /* the thread structure for non-joinable threads is freed upon |
| thread end. We free the memory here. This will leave loose end, |
| if a joinable thread is not joined. */ |
| |
| g_free (thread); |
| } |
| |
| void |
| g_thread_set_priority (GThread* thread, |
| GThreadPriority priority) |
| { |
| GRealThread* real = (GRealThread*) thread; |
| |
| g_return_if_fail (thread); |
| g_return_if_fail (!g_system_thread_equal (real->system_thread, zero_thread)); |
| g_return_if_fail (priority >= G_THREAD_PRIORITY_LOW); |
| g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT); |
| |
| thread->priority = priority; |
| |
| #ifdef G_THREAD_USE_PID_SURROGATE |
| if (g_thread_use_default_impl) |
| SET_PRIO (real->pid, priority); |
| else |
| #endif /* G_THREAD_USE_PID_SURROGATE */ |
| G_THREAD_CF (thread_set_priority, (void)0, |
| (&real->system_thread, priority)); |
| } |
| |
| GThread* |
| g_thread_self (void) |
| { |
| GRealThread* thread = g_private_get (g_thread_specific_private); |
| |
| if (!thread) |
| { |
| /* If no thread data is available, provide and set one. This |
| can happen for the main thread and for threads, that are not |
| created by GLib. */ |
| thread = g_new (GRealThread, 1); |
| thread->thread.joinable = FALSE; /* This is a save guess */ |
| thread->thread.bound = TRUE; /* This isn't important at all */ |
| thread->thread.priority = G_THREAD_PRIORITY_NORMAL; /* This is |
| just a guess */ |
| thread->func = NULL; |
| thread->arg = NULL; |
| thread->private_data = NULL; |
| thread->context = NULL; |
| |
| if (g_thread_supported ()) |
| G_THREAD_UF (thread_self, (&thread->system_thread)); |
| |
| #ifdef G_THREAD_USE_PID_SURROGATE |
| thread->pid = getpid (); |
| #endif /* G_THREAD_USE_PID_SURROGATE */ |
| |
| g_private_set (g_thread_specific_private, thread); |
| |
| G_LOCK (g_thread); |
| g_thread_all_threads = g_slist_prepend (g_thread_all_threads, thread); |
| G_UNLOCK (g_thread); |
| } |
| |
| return (GThread*)thread; |
| } |
| |
| void |
| g_static_rw_lock_init (GStaticRWLock* lock) |
| { |
| static GStaticRWLock init_lock = G_STATIC_RW_LOCK_INIT; |
| |
| g_return_if_fail (lock); |
| |
| memcpy (lock, &init_lock, sizeof (GStaticRWLock)); |
| } |
| |
| static void inline |
| g_static_rw_lock_wait (GCond** cond, GStaticMutex* mutex) |
| { |
| if (!*cond) |
| *cond = g_cond_new (); |
| g_cond_wait (*cond, g_static_mutex_get_mutex (mutex)); |
| } |
| |
| static void inline |
| g_static_rw_lock_signal (GStaticRWLock* lock) |
| { |
| if (lock->want_to_write && lock->write_cond) |
| g_cond_signal (lock->write_cond); |
| else if (lock->read_cond) |
| g_cond_broadcast (lock->read_cond); |
| } |
| |
| void |
| g_static_rw_lock_reader_lock (GStaticRWLock* lock) |
| { |
| g_return_if_fail (lock); |
| |
| if (!g_threads_got_initialized) |
| return; |
| |
| g_static_mutex_lock (&lock->mutex); |
| while (lock->write || lock->want_to_write) |
| g_static_rw_lock_wait (&lock->read_cond, &lock->mutex); |
| lock->read_counter++; |
| g_static_mutex_unlock (&lock->mutex); |
| } |
| |
| gboolean |
| g_static_rw_lock_reader_trylock (GStaticRWLock* lock) |
| { |
| gboolean ret_val = FALSE; |
| |
| g_return_val_if_fail (lock, FALSE); |
| |
| if (!g_threads_got_initialized) |
| return TRUE; |
| |
| g_static_mutex_lock (&lock->mutex); |
| if (!lock->write && !lock->want_to_write) |
| { |
| lock->read_counter++; |
| ret_val = TRUE; |
| } |
| g_static_mutex_unlock (&lock->mutex); |
| return ret_val; |
| } |
| |
| void |
| g_static_rw_lock_reader_unlock (GStaticRWLock* lock) |
| { |
| g_return_if_fail (lock); |
| |
| if (!g_threads_got_initialized) |
| return; |
| |
| g_static_mutex_lock (&lock->mutex); |
| lock->read_counter--; |
| if (lock->read_counter == 0) |
| g_static_rw_lock_signal (lock); |
| g_static_mutex_unlock (&lock->mutex); |
| } |
| |
| void |
| g_static_rw_lock_writer_lock (GStaticRWLock* lock) |
| { |
| g_return_if_fail (lock); |
| |
| if (!g_threads_got_initialized) |
| return; |
| |
| g_static_mutex_lock (&lock->mutex); |
| lock->want_to_write++; |
| while (lock->write || lock->read_counter) |
| g_static_rw_lock_wait (&lock->write_cond, &lock->mutex); |
| lock->want_to_write--; |
| lock->write = TRUE; |
| g_static_mutex_unlock (&lock->mutex); |
| } |
| |
| gboolean |
| g_static_rw_lock_writer_trylock (GStaticRWLock* lock) |
| { |
| gboolean ret_val = FALSE; |
| |
| g_return_val_if_fail (lock, FALSE); |
| |
| if (!g_threads_got_initialized) |
| return TRUE; |
| |
| g_static_mutex_lock (&lock->mutex); |
| if (!lock->write && !lock->read_counter) |
| { |
| lock->write = TRUE; |
| ret_val = TRUE; |
| } |
| g_static_mutex_unlock (&lock->mutex); |
| return ret_val; |
| } |
| |
| void |
| g_static_rw_lock_writer_unlock (GStaticRWLock* lock) |
| { |
| g_return_if_fail (lock); |
| |
| if (!g_threads_got_initialized) |
| return; |
| |
| g_static_mutex_lock (&lock->mutex); |
| lock->write = FALSE; |
| g_static_rw_lock_signal (lock); |
| g_static_mutex_unlock (&lock->mutex); |
| } |
| |
| void |
| g_static_rw_lock_free (GStaticRWLock* lock) |
| { |
| g_return_if_fail (lock); |
| |
| if (lock->read_cond) |
| { |
| g_cond_free (lock->read_cond); |
| lock->read_cond = NULL; |
| } |
| if (lock->write_cond) |
| { |
| g_cond_free (lock->write_cond); |
| lock->write_cond = NULL; |
| } |
| g_static_mutex_free (&lock->mutex); |
| } |