luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2025-01-26 05:56:14 +01:00
Code Issues Packages Projects Releases Wiki Activity

Move deprecated GThread functions to a separate file

Browse Source
This commit is contained in:
Matthias Clasen 2011-09-25 00:37:31 -04:00
parent e34861da08
commit 0ea89987e2
4 changed files with 1048 additions and 1026 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
glib/Makefile.am
View File

@ -114,7 +114,8 @@ uninstall-ms-lib:
deprecated_sources = \
deprecated/gallocator.c \
deprecated/gcompletion.c \
deprecated/grel.c
deprecated/grel.c \
deprecated/gthread-deprecated.c
libglib_2_0_la_SOURCES = \
$(deprecated_sources) \

977
glib/deprecated/gthread-deprecated.c Normal file
View File

@ -0,0 +1,977 @@
/* GLIB - Library of useful routines for C programming
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* gthread.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.
*/
#include "config.h"
#include "gmessages.h"
#include "gmain.h"
#include "gthread.h"
#include "gthreadprivate.h"
#include "deprecated/gthread.h"
/* {{{1 Documentation */
/**
* GThreadPriority:
* @G_THREAD_PRIORITY_LOW: a priority lower than normal
* @G_THREAD_PRIORITY_NORMAL: the default priority
* @G_THREAD_PRIORITY_HIGH: a priority higher than normal
* @G_THREAD_PRIORITY_URGENT: the highest priority
*
* Deprecated:2.32: thread priorities no longer have any effect.
*/
/**
* GThreadFunctions:
* @mutex_new: virtual function pointer for g_mutex_new()
* @mutex_lock: virtual function pointer for g_mutex_lock()
* @mutex_trylock: virtual function pointer for g_mutex_trylock()
* @mutex_unlock: virtual function pointer for g_mutex_unlock()
* @mutex_free: virtual function pointer for g_mutex_free()
* @cond_new: virtual function pointer for g_cond_new()
* @cond_signal: virtual function pointer for g_cond_signal()
* @cond_broadcast: virtual function pointer for g_cond_broadcast()
* @cond_wait: virtual function pointer for g_cond_wait()
* @cond_timed_wait: virtual function pointer for g_cond_timed_wait()
* @cond_free: virtual function pointer for g_cond_free()
* @private_new: virtual function pointer for g_private_new()
* @private_get: virtual function pointer for g_private_get()
* @private_set: virtual function pointer for g_private_set()
* @thread_create: virtual function pointer for g_thread_create()
* @thread_yield: virtual function pointer for g_thread_yield()
* @thread_join: virtual function pointer for g_thread_join()
* @thread_exit: virtual function pointer for g_thread_exit()
* @thread_set_priority: virtual function pointer for
* g_thread_set_priority()
* @thread_self: virtual function pointer for g_thread_self()
* @thread_equal: used internally by recursive mutex locks and by some
* assertion checks
*
* This function table is no longer used by g_thread_init()
* to initialize the thread system.
*/
/* {{{1 Exported Variables */
gboolean g_thread_use_default_impl = TRUE;
GThreadFunctions g_thread_functions_for_glib_use =
{
g_mutex_new,
g_mutex_lock,
g_mutex_trylock,
g_mutex_unlock,
g_mutex_free,
g_cond_new,
g_cond_signal,
g_cond_broadcast,
g_cond_wait,
g_cond_timed_wait,
g_cond_free,
g_private_new,
g_private_get,
g_private_set,
NULL,
g_thread_yield,
NULL,
NULL,
NULL,
NULL,
NULL,
};
static guint64
gettime (void)
{
return g_get_monotonic_time () * 1000;
}
guint64 (*g_thread_gettime) (void) = gettime;
/* Misc. GThread functions {{{1 */
/**
* g_thread_set_priority:
* @thread: a #GThread.
* @priority: ignored
*
* This function does nothing.
*
* Deprecated:2.32: Thread priorities no longer have any effect.
*/
void
g_thread_set_priority (GThread *thread,
GThreadPriority priority)
{
}
/**
* g_thread_create_full:
* @func: a function to execute in the new thread.
* @data: an argument to supply to the new thread.
* @stack_size: a stack size for the new thread.
* @joinable: should this thread be joinable?
* @bound: ignored
* @priority: ignored
* @error: return location for error.
* @Returns: the new #GThread on success.
*
* This function creates a new thread.
*
* Deprecated:2.32: The @bound and @priority arguments are now ignored.
* Use g_thread_create() or g_thread_create_with_stack_size() instead.
*/
GThread *
g_thread_create_full (GThreadFunc func,
gpointer data,
gulong stack_size,
gboolean joinable,
gboolean bound,
GThreadPriority priority,
GError **error)
{
return g_thread_create_with_stack_size (func, data, joinable, stack_size, error);
}
/* GStaticMutex {{{1 ------------------------------------------------------ */
/**
* GStaticMutex:
*
* A #GStaticMutex works like a #GMutex.
*
* Prior to GLib 2.32, GStaticMutex had the significant advantage
* that it doesn't need to be created at run-time, but can be defined
* at compile-time. Since 2.32, #GMutex can be statically allocated
* as well, and GStaticMutex has been deprecated.
*
* Here is a version of our give_me_next_number() example using
* a GStaticMutex.
*
* <example>
* <title>
* Using <structname>GStaticMutex</structname>
* to simplify thread-safe programming
* </title>
* <programlisting>
* int
* give_me_next_number (void)
* {
* static int current_number = 0;
* int ret_val;
* static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
*
* g_static_mutex_lock (&amp;mutex);
* ret_val = current_number = calc_next_number (current_number);
* g_static_mutex_unlock (&amp;mutex);
*
* return ret_val;
* }
* </programlisting>
* </example>
*
* Sometimes you would like to dynamically create a mutex. If you don't
* want to require prior calling to g_thread_init(), because your code
* should also be usable in non-threaded programs, you are not able to
* use g_mutex_new() and thus #GMutex, as that requires a prior call to
* g_thread_init(). In theses cases you can also use a #GStaticMutex.
* It must be initialized with g_static_mutex_init() before using it
* and freed with with g_static_mutex_free() when not needed anymore to
* free up any allocated resources.
*
* Even though #GStaticMutex is not opaque, it should only be used with
* the following functions, as it is defined differently on different
* platforms.
*
* All of the <function>g_static_mutex_*</function> functions apart
* from <function>g_static_mutex_get_mutex</function> can also be used
* even if g_thread_init() has not yet been called. Then they do
* nothing, apart from <function>g_static_mutex_trylock</function>,
* which does nothing but returning %TRUE.
*
* <note><para>All of the <function>g_static_mutex_*</function>
* functions are actually macros. Apart from taking their addresses, you
* can however use them as if they were functions.</para></note>
**/
/**
* G_STATIC_MUTEX_INIT:
*
* A #GStaticMutex must be initialized with this macro, before it can
* be used. This macro can used be to initialize a variable, but it
* cannot be assigned to a variable. In that case you have to use
* g_static_mutex_init().
*
* |[
* GStaticMutex my_mutex = G_STATIC_MUTEX_INIT;
* ]|
**/
/**
* g_static_mutex_init:
* @mutex: a #GStaticMutex to be initialized.
*
* Initializes @mutex.
* Alternatively you can initialize it with #G_STATIC_MUTEX_INIT.
*
* Deprecated: 2.32: Use g_mutex_init()
*/
void
g_static_mutex_init (GStaticMutex *mutex)
{
static const GStaticMutex init_mutex = G_STATIC_MUTEX_INIT;
g_return_if_fail (mutex);
*mutex = init_mutex;
}
/* IMPLEMENTATION NOTE:
*
* On some platforms a GStaticMutex is actually a normal GMutex stored
* inside of a structure instead of being allocated dynamically. We can
* only do this for platforms on which we know, in advance, how to
* allocate (size) and initialise (value) that memory.
*
* On other platforms, a GStaticMutex is nothing more than a pointer to
* a GMutex. In that case, the first access we make to the static mutex
* must first allocate the normal GMutex and store it into the pointer.
*
* configure.ac writes macros into glibconfig.h to determine if
* g_static_mutex_get_mutex() accesses the structure in memory directly
* (on platforms where we are able to do that) or if it ends up here,
* where we may have to allocate the GMutex before returning it.
*/
/**
* g_static_mutex_get_mutex:
* @mutex: a #GStaticMutex.
* @Returns: the #GMutex corresponding to @mutex.
*
* For some operations (like g_cond_wait()) you must have a #GMutex
* instead of a #GStaticMutex. This function will return the
* corresponding #GMutex for @mutex.
*
* Deprecated: 2.32: Just use a #GMutex
*/
GMutex *
g_static_mutex_get_mutex_impl (GMutex** mutex)
{
GMutex *result;
if (!g_thread_supported ())
return NULL;
result = g_atomic_pointer_get (mutex);
if (!result)
{
g_mutex_lock (&g_once_mutex);
result = *mutex;
if (!result)
{
result = g_mutex_new ();
g_atomic_pointer_set (mutex, result);
}
g_mutex_unlock (&g_once_mutex);
}
return result;
}
/* IMPLEMENTATION NOTE:
*
* g_static_mutex_lock(), g_static_mutex_trylock() and
* g_static_mutex_unlock() are all preprocessor macros that wrap the
* corresponding g_mutex_*() function around a call to
* g_static_mutex_get_mutex().
*/
/**
* g_static_mutex_lock:
* @mutex: a #GStaticMutex.
*
* Works like g_mutex_lock(), but for a #GStaticMutex.
*
* Deprecated: 2.32: Use g_mutex_lock()
*/
/**
* g_static_mutex_trylock:
* @mutex: a #GStaticMutex.
* @Returns: %TRUE, if the #GStaticMutex could be locked.
*
* Works like g_mutex_trylock(), but for a #GStaticMutex.
*
* Deprecated: 2.32: Use g_mutex_trylock()
*/
/**
* g_static_mutex_unlock:
* @mutex: a #GStaticMutex.
*
* Works like g_mutex_unlock(), but for a #GStaticMutex.
*
* Deprecated: 2.32: Use g_mutex_unlock()
*/
/**
* g_static_mutex_free:
* @mutex: a #GStaticMutex to be freed.
*
* Releases all resources allocated to @mutex.
*
* You don't have to call this functions for a #GStaticMutex with an
* unbounded lifetime, i.e. objects declared 'static', but if you have
* a #GStaticMutex as a member of a structure and the structure is
* freed, you should also free the #GStaticMutex.
*
* <note><para>Calling g_static_mutex_free() on a locked mutex may
* result in undefined behaviour.</para></note>
*
* Deprecated: 2.32: Use g_mutex_free()
*/
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.ac. Note, that
* this variable is NULL, if g_thread_init() hasn't been called or
* if we're using the default thread implementation and it provides
* static mutexes. */
runtime_mutex = ((GMutex**)mutex);
if (*runtime_mutex)
g_mutex_free (*runtime_mutex);
*runtime_mutex = NULL;
}
/* {{{1 GStaticRecMutex */
/**
* GStaticRecMutex:
*
* A #GStaticRecMutex works like a #GStaticMutex, but it can be locked
* multiple times by one thread. If you enter it n times, you have to
* unlock it n times again to let other threads lock it. An exception
* is the function g_static_rec_mutex_unlock_full(): that allows you to
* unlock a #GStaticRecMutex completely returning the depth, (i.e. the
* number of times this mutex was locked). The depth can later be used
* to restore the state of the #GStaticRecMutex by calling
* g_static_rec_mutex_lock_full(). In GLib 2.32, #GStaticRecMutex has
* been deprecated in favor of #GRecMutex.
*
* Even though #GStaticRecMutex is not opaque, it should only be used
* with the following functions.
*
* All of the <function>g_static_rec_mutex_*</function> functions can
* be used even if g_thread_init() has not been called. Then they do
* nothing, apart from <function>g_static_rec_mutex_trylock</function>,
* which does nothing but returning %TRUE.
**/
/**
* G_STATIC_REC_MUTEX_INIT:
*
* A #GStaticRecMutex must be initialized with this macro before it can
* be used. This macro can used be to initialize a variable, but it
* cannot be assigned to a variable. In that case you have to use
* g_static_rec_mutex_init().
*
* |[
* GStaticRecMutex my_mutex = G_STATIC_REC_MUTEX_INIT;
* ]|
*/
/**
* g_static_rec_mutex_init:
* @mutex: a #GStaticRecMutex to be initialized.
*
* A #GStaticRecMutex must be initialized with this function before it
* can be used. Alternatively you can initialize it with
* #G_STATIC_REC_MUTEX_INIT.
*
* Deprecated: 2.32: Use g_rec_mutex_init()
*/
void
g_static_rec_mutex_init (GStaticRecMutex *mutex)
{
static const GStaticRecMutex init_mutex = G_STATIC_REC_MUTEX_INIT;
g_return_if_fail (mutex);
*mutex = init_mutex;
}
/**
* g_static_rec_mutex_lock:
* @mutex: a #GStaticRecMutex to lock.
*
* Locks @mutex. If @mutex is already locked by another thread, the
* current thread will block until @mutex is unlocked by the other
* thread. If @mutex is already locked by the calling thread, this
* functions increases the depth of @mutex and returns immediately.
*
* Deprecated: 2.32: Use g_rec_mutex_lock()
*/
void
g_static_rec_mutex_lock (GStaticRecMutex* mutex)
{
GSystemThread self;
g_return_if_fail (mutex);
if (!g_thread_supported ())
return;
g_system_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;
}
/**
* g_static_rec_mutex_trylock:
* @mutex: a #GStaticRecMutex to lock.
* @Returns: %TRUE, if @mutex could be locked.
*
* Tries to lock @mutex. If @mutex is already locked by another thread,
* it immediately returns %FALSE. Otherwise it locks @mutex and returns
* %TRUE. If @mutex is already locked by the calling thread, this
* functions increases the depth of @mutex and immediately returns
* %TRUE.
*
* Deprecated: 2.32: Use g_rec_mutex_trylock()
*/
gboolean
g_static_rec_mutex_trylock (GStaticRecMutex* mutex)
{
GSystemThread self;
g_return_val_if_fail (mutex, FALSE);
if (!g_thread_supported ())
return TRUE;
g_system_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;
}
/**
* g_static_rec_mutex_unlock:
* @mutex: a #GStaticRecMutex to unlock.
*
* Unlocks @mutex. Another thread will be allowed to lock @mutex only
* when it has been unlocked as many times as it had been locked
* before. If @mutex is completely unlocked and another thread is
* blocked in a g_static_rec_mutex_lock() call for @mutex, it will be
* woken and can lock @mutex itself.
*
* Deprecated: 2.32: Use g_rec_mutex_unlock()
*/
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);
}
/**
* g_static_rec_mutex_lock_full:
* @mutex: a #GStaticRecMutex to lock.
* @depth: number of times this mutex has to be unlocked to be
* completely unlocked.
*
* Works like calling g_static_rec_mutex_lock() for @mutex @depth times.
*
* Deprecated: 2.32: Use g_rec_mutex_lock()
*/
void
g_static_rec_mutex_lock_full (GStaticRecMutex *mutex,
guint depth)
{
GSystemThread self;
g_return_if_fail (mutex);
if (!g_thread_supported ())
return;
if (depth == 0)
return;
g_system_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;
}
/**
* g_static_rec_mutex_unlock_full:
* @mutex: a #GStaticRecMutex to completely unlock.
* @Returns: number of times @mutex has been locked by the current
* thread.
*
* Completely unlocks @mutex. If another thread is blocked in a
* g_static_rec_mutex_lock() call for @mutex, it will be woken and can
* lock @mutex itself. This function returns the number of times that
* @mutex has been locked by the current thread. To restore the state
* before the call to g_static_rec_mutex_unlock_full() you can call
* g_static_rec_mutex_lock_full() with the depth returned by this
* function.
*
* Deprecated: 2.32: Use g_rec_mutex_unlock()
*/
guint
g_static_rec_mutex_unlock_full (GStaticRecMutex *mutex)
{
guint 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;
}
/**
* g_static_rec_mutex_free:
* @mutex: a #GStaticRecMutex to be freed.
*
* Releases all resources allocated to a #GStaticRecMutex.
*
* You don't have to call this functions for a #GStaticRecMutex with an
* unbounded lifetime, i.e. objects declared 'static', but if you have
* a #GStaticRecMutex as a member of a structure and the structure is
* freed, you should also free the #GStaticRecMutex.
*
* Deprecated: 2.32: Use g_rec_mutex_clear()
*/
void
g_static_rec_mutex_free (GStaticRecMutex *mutex)
{
g_return_if_fail (mutex);
g_static_mutex_free (&mutex->mutex);
}
/* GStaticRWLock {{{1 ----------------------------------------------------- */
/**
* GStaticRWLock:
*
* The #GStaticRWLock struct represents a read-write lock. A read-write
* lock can be used for protecting data that some portions of code only
* read from, while others also write. In such situations it is
* desirable that several readers can read at once, whereas of course
* only one writer may write at a time. Take a look at the following
* example:
*
* <example>
* <title>An array with access functions</title>
* <programlisting>
* GStaticRWLock rwlock = G_STATIC_RW_LOCK_INIT;
* GPtrArray *array;
*
* gpointer
* my_array_get (guint index)
* {
* gpointer retval = NULL;
*
* if (!array)
* return NULL;
*
* g_static_rw_lock_reader_lock (&amp;rwlock);
* if (index &lt; array->len)
* retval = g_ptr_array_index (array, index);
* g_static_rw_lock_reader_unlock (&amp;rwlock);
*
* return retval;
* }
*
* void
* my_array_set (guint index, gpointer data)
* {
* g_static_rw_lock_writer_lock (&amp;rwlock);
*
* if (!array)
* array = g_ptr_array_new (<!-- -->);
*
* if (index >= array->len)
* g_ptr_array_set_size (array, index+1);
* g_ptr_array_index (array, index) = data;
*
* g_static_rw_lock_writer_unlock (&amp;rwlock);
* }
* </programlisting>
* </example>
*
* This example shows an array which can be accessed by many readers
* (the <function>my_array_get()</function> function) simultaneously,
* whereas the writers (the <function>my_array_set()</function>
* function) will only be allowed once at a time and only if no readers
* currently access the array. This is because of the potentially
* dangerous resizing of the array. Using these functions is fully
* multi-thread safe now.
*
* Most of the time, writers should have precedence over readers. That
* means, for this implementation, that as soon as a writer wants to
* lock the data, no other reader is allowed to lock the data, whereas,
* of course, the readers that already have locked the data are allowed
* to finish their operation. As soon as the last reader unlocks the
* data, the writer will lock it.
*
* Even though #GStaticRWLock is not opaque, it should only be used
* with the following functions.
*
* All of the <function>g_static_rw_lock_*</function> functions can be
* used even if g_thread_init() has not been called. Then they do
* nothing, apart from <function>g_static_rw_lock_*_trylock</function>,
* which does nothing but returning %TRUE.
*
* <note><para>A read-write lock has a higher overhead than a mutex. For
* example, both g_static_rw_lock_reader_lock() and
* g_static_rw_lock_reader_unlock() have to lock and unlock a
* #GStaticMutex, so it takes at least twice the time to lock and unlock
* a #GStaticRWLock that it does to lock and unlock a #GStaticMutex. So
* only data structures that are accessed by multiple readers, and which
* keep the lock for a considerable time justify a #GStaticRWLock. The
* above example most probably would fare better with a
* #GStaticMutex.</para></note>
*
* Deprecated: 2.32: Use a #GRWLock instead
**/
/**
* G_STATIC_RW_LOCK_INIT:
*
* A #GStaticRWLock must be initialized with this macro before it can
* be used. This macro can used be to initialize a variable, but it
* cannot be assigned to a variable. In that case you have to use
* g_static_rw_lock_init().
*
* |[
* GStaticRWLock my_lock = G_STATIC_RW_LOCK_INIT;
* ]|
*/
/**
* g_static_rw_lock_init:
* @lock: a #GStaticRWLock to be initialized.
*
* A #GStaticRWLock must be initialized with this function before it
* can be used. Alternatively you can initialize it with
* #G_STATIC_RW_LOCK_INIT.
*
* Deprecated: 2.32: Use g_rw_lock_init() instead
*/
void
g_static_rw_lock_init (GStaticRWLock* lock)
{
static const GStaticRWLock init_lock = G_STATIC_RW_LOCK_INIT;
g_return_if_fail (lock);
*lock = init_lock;
}
inline static void
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));
}
inline static void
g_static_rw_lock_signal (GStaticRWLock* lock)
{
if (lock->want_to_write && lock->write_cond)
g_cond_signal (lock->write_cond);
else if (lock->want_to_read && lock->read_cond)
g_cond_broadcast (lock->read_cond);
}
/**
* g_static_rw_lock_reader_lock:
* @lock: a #GStaticRWLock to lock for reading.
*
* Locks @lock for reading. There may be unlimited concurrent locks for
* reading of a #GStaticRWLock at the same time. If @lock is already
* locked for writing by another thread or if another thread is already
* waiting to lock @lock for writing, this function will block until
* @lock is unlocked by the other writing thread and no other writing
* threads want to lock @lock. This lock has to be unlocked by
* g_static_rw_lock_reader_unlock().
*
* #GStaticRWLock is not recursive. It might seem to be possible to
* recursively lock for reading, but that can result in a deadlock, due
* to writer preference.
*
* Deprecated: 2.32: Use g_rw_lock_reader_lock() instead
*/
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);
lock->want_to_read++;
while (lock->have_writer || lock->want_to_write)
g_static_rw_lock_wait (&lock->read_cond, &lock->mutex);
lock->want_to_read--;
lock->read_counter++;
g_static_mutex_unlock (&lock->mutex);
}
/**
* g_static_rw_lock_reader_trylock:
* @lock: a #GStaticRWLock to lock for reading.
* @Returns: %TRUE, if @lock could be locked for reading.
*
* Tries to lock @lock for reading. If @lock is already locked for
* writing by another thread or if another thread is already waiting to
* lock @lock for writing, immediately returns %FALSE. Otherwise locks
* @lock for reading and returns %TRUE. This lock has to be unlocked by
* g_static_rw_lock_reader_unlock().
*
* Deprectated: 2.32: Use g_rw_lock_reader_trylock() instead
*/
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->have_writer && !lock->want_to_write)
{
lock->read_counter++;
ret_val = TRUE;
}
g_static_mutex_unlock (&lock->mutex);
return ret_val;
}
/**
* g_static_rw_lock_reader_unlock:
* @lock: a #GStaticRWLock to unlock after reading.
*
* Unlocks @lock. If a thread waits to lock @lock for writing and all
* locks for reading have been unlocked, the waiting thread is woken up
* and can lock @lock for writing.
*
* Deprectated: 2.32: Use g_rw_lock_reader_unlock() instead
*/
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);
}
/**
* g_static_rw_lock_writer_lock:
* @lock: a #GStaticRWLock to lock for writing.
*
* Locks @lock for writing. If @lock is already locked for writing or
* reading by other threads, this function will block until @lock is
* completely unlocked and then lock @lock for writing. While this
* functions waits to lock @lock, no other thread can lock @lock for
* reading. When @lock is locked for writing, no other thread can lock
* @lock (neither for reading nor writing). This lock has to be
* unlocked by g_static_rw_lock_writer_unlock().
*
* Deprectated: 2.32: Use g_rw_lock_writer_lock() instead
*/
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->have_writer || lock->read_counter)
g_static_rw_lock_wait (&lock->write_cond, &lock->mutex);
lock->want_to_write--;
lock->have_writer = TRUE;
g_static_mutex_unlock (&lock->mutex);
}
/**
* g_static_rw_lock_writer_trylock:
* @lock: a #GStaticRWLock to lock for writing.
* @Returns: %TRUE, if @lock could be locked for writing.
*
* Tries to lock @lock for writing. If @lock is already locked (for
* either reading or writing) by another thread, it immediately returns
* %FALSE. Otherwise it locks @lock for writing and returns %TRUE. This
* lock has to be unlocked by g_static_rw_lock_writer_unlock().
*
* Deprectated: 2.32: Use g_rw_lock_writer_trylock() instead
*/
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->have_writer && !lock->read_counter)
{
lock->have_writer = TRUE;
ret_val = TRUE;
}
g_static_mutex_unlock (&lock->mutex);
return ret_val;
}
/**
* g_static_rw_lock_writer_unlock:
* @lock: a #GStaticRWLock to unlock after writing.
*
* Unlocks @lock. If a thread is waiting to lock @lock for writing and
* all locks for reading have been unlocked, the waiting thread is
* woken up and can lock @lock for writing. If no thread is waiting to
* lock @lock for writing, and some thread or threads are waiting to
* lock @lock for reading, the waiting threads are woken up and can
* lock @lock for reading.
*
* Deprectated: 2.32: Use g_rw_lock_writer_unlock() instead
*/
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->have_writer = FALSE;
g_static_rw_lock_signal (lock);
g_static_mutex_unlock (&lock->mutex);
}
/**
* g_static_rw_lock_free:
* @lock: a #GStaticRWLock to be freed.
*
* Releases all resources allocated to @lock.
*
* You don't have to call this functions for a #GStaticRWLock with an
* unbounded lifetime, i.e. objects declared 'static', but if you have
* a #GStaticRWLock as a member of a structure, and the structure is
* freed, you should also free the #GStaticRWLock.
*
* Deprecated: 2.32: Use a #GRWLock instead
*/
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);
}
/* vim: set foldmethod=marker: */

1091
glib/gthread.c
View File

File diff suppressed because it is too large Load Diff

3
glib/gthreadprivate.h
View File

@ -47,6 +47,9 @@ G_GNUC_INTERNAL gboolean g_system_thread_equal (gpointer thread1,
G_GNUC_INTERNAL void g_system_thread_exit (void);
G_GNUC_INTERNAL GSystemThread zero_thread;
G_GNUC_INTERNAL GMutex g_once_mutex;
/* Is called from gthread/gthread-impl.c */
void g_thread_init_glib (void);