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Add 'want_to_read' to GStaticRWLock to avoid calling g_cond_broadcast,

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2001-08-30  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
	GStaticRWLock to avoid calling g_cond_broadcast, when no one is
	waiting.
This commit is contained in:
Sebastian Wilhelmi 2001-08-30 14:19:20 +00:00 committed by Sebastian Wilhelmi
parent cf11b57917
commit bd2329ae66
10 changed files with 37 additions and 2 deletions
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4
ChangeLog
View File

@ -1,5 +1,9 @@
2001-08-30 Sebastian Wilhelmi <wilhelmi@ira.uka.de>
* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
GStaticRWLock to avoid calling g_cond_broadcast, when no one is
waiting.
* glib/gmain.c (g_main_context_add_poll_unlocked): Don't free
cached_poll_array, when adding new poll's. This is taken care for
in g_main_context_iterate.

4
ChangeLog.pre-2-0
View File

@ -1,5 +1,9 @@
2001-08-30 Sebastian Wilhelmi <wilhelmi@ira.uka.de>
* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
GStaticRWLock to avoid calling g_cond_broadcast, when no one is
waiting.
* glib/gmain.c (g_main_context_add_poll_unlocked): Don't free
cached_poll_array, when adding new poll's. This is taken care for
in g_main_context_iterate.

4
ChangeLog.pre-2-10
View File

@ -1,5 +1,9 @@
2001-08-30 Sebastian Wilhelmi <wilhelmi@ira.uka.de>
* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
GStaticRWLock to avoid calling g_cond_broadcast, when no one is
waiting.
* glib/gmain.c (g_main_context_add_poll_unlocked): Don't free
cached_poll_array, when adding new poll's. This is taken care for
in g_main_context_iterate.

4
ChangeLog.pre-2-12
View File

@ -1,5 +1,9 @@
2001-08-30 Sebastian Wilhelmi <wilhelmi@ira.uka.de>
* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
GStaticRWLock to avoid calling g_cond_broadcast, when no one is
waiting.
* glib/gmain.c (g_main_context_add_poll_unlocked): Don't free
cached_poll_array, when adding new poll's. This is taken care for
in g_main_context_iterate.

4
ChangeLog.pre-2-2
View File

@ -1,5 +1,9 @@
2001-08-30 Sebastian Wilhelmi <wilhelmi@ira.uka.de>
* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
GStaticRWLock to avoid calling g_cond_broadcast, when no one is
waiting.
* glib/gmain.c (g_main_context_add_poll_unlocked): Don't free
cached_poll_array, when adding new poll's. This is taken care for
in g_main_context_iterate.

4
ChangeLog.pre-2-4
View File

@ -1,5 +1,9 @@
2001-08-30 Sebastian Wilhelmi <wilhelmi@ira.uka.de>
* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
GStaticRWLock to avoid calling g_cond_broadcast, when no one is
waiting.
* glib/gmain.c (g_main_context_add_poll_unlocked): Don't free
cached_poll_array, when adding new poll's. This is taken care for
in g_main_context_iterate.

4
ChangeLog.pre-2-6
View File

@ -1,5 +1,9 @@
2001-08-30 Sebastian Wilhelmi <wilhelmi@ira.uka.de>
* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
GStaticRWLock to avoid calling g_cond_broadcast, when no one is
waiting.
* glib/gmain.c (g_main_context_add_poll_unlocked): Don't free
cached_poll_array, when adding new poll's. This is taken care for
in g_main_context_iterate.

4
ChangeLog.pre-2-8
View File

@ -1,5 +1,9 @@
2001-08-30 Sebastian Wilhelmi <wilhelmi@ira.uka.de>
* glib/gthread.h, glib/gthread.c: Add 'want_to_read' to
GStaticRWLock to avoid calling g_cond_broadcast, when no one is
waiting.
* glib/gmain.c (g_main_context_add_poll_unlocked): Don't free
cached_poll_array, when adding new poll's. This is taken care for
in g_main_context_iterate.

4
glib/gthread.c
View File

@ -692,7 +692,7 @@ 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)
else if (lock->want_to_read && lock->read_cond)
g_cond_broadcast (lock->read_cond);
}
@ -705,8 +705,10 @@ g_static_rw_lock_reader_lock (GStaticRWLock* lock)
return;
g_static_mutex_lock (&lock->mutex);
lock->want_to_read++;
while (lock->write || 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);
}

3
glib/gthread.h
View File

@ -263,10 +263,11 @@ struct _GStaticRWLock
GCond *write_cond;
guint read_counter;
gboolean write;
guint want_to_read;
guint want_to_write;
};
#define G_STATIC_RW_LOCK_INIT { G_STATIC_MUTEX_INIT, NULL, NULL, 0, FALSE, FALSE }
#define G_STATIC_RW_LOCK_INIT { G_STATIC_MUTEX_INIT, NULL, NULL, 0, FALSE, 0, 0 }
void g_static_rw_lock_init (GStaticRWLock* lock);
void g_static_rw_lock_reader_lock (GStaticRWLock* lock);