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emufutex: remove init from g_thread_init_glib

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Use a GStaticMutex instead.
This commit is contained in:
Ryan Lortie 2011-09-09 13:20:40 -04:00
parent 80109acef5
commit 413186a962
4 changed files with 8 additions and 19 deletions
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19
glib/gbitlock.c
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@ -36,17 +36,10 @@
#endif
#ifndef HAVE_FUTEX
static GStaticMutex g_futex_mutex = G_STATIC_MUTEX_INIT;
static GSList *g_futex_address_list = NULL;
static GMutex *g_futex_mutex = NULL;
#endif
void
_g_futex_thread_init (void) {
#ifndef HAVE_FUTEX
g_futex_mutex = g_mutex_new ();
#endif
}
#ifdef HAVE_FUTEX
/*
* We have headers for futex(2) on the build machine. This does not
@ -131,7 +124,7 @@ static void
g_futex_wait (const volatile gint *address,
gint value)
{
g_mutex_lock (g_futex_mutex);
g_static_mutex_lock (&g_futex_mutex);
if G_LIKELY (g_atomic_int_get (address) == value)
{
WaitAddress *waiter;
@ -147,7 +140,7 @@ g_futex_wait (const volatile gint *address,
}
waiter->ref_count++;
g_cond_wait (waiter->wait_queue, g_futex_mutex);
g_cond_wait (waiter->wait_queue, g_static_mutex_get_mutex (&g_futex_mutex));
if (!--waiter->ref_count)
{
@ -157,7 +150,7 @@ g_futex_wait (const volatile gint *address,
g_slice_free (WaitAddress, waiter);
}
}
g_mutex_unlock (g_futex_mutex);
g_static_mutex_unlock (&g_futex_mutex);
}
static void
@ -171,10 +164,10 @@ g_futex_wake (const volatile gint *address)
* 2) need to -stay- locked until the end to ensure a wake()
* in another thread doesn't cause 'waiter' to stop existing
*/
g_mutex_lock (g_futex_mutex);
g_static_mutex_lock (&g_futex_mutex);
if ((waiter = g_futex_find_address (address)))
g_cond_signal (waiter->wait_queue);
g_mutex_unlock (g_futex_mutex);
g_static_mutex_unlock (&g_futex_mutex);
}
#endif

1
glib/gthread.c
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@ -963,7 +963,6 @@ g_thread_init_glib (void)
_g_rand_thread_init ();
_g_main_thread_init ();
_g_utils_thread_init ();
_g_futex_thread_init ();
}
/* The following sections implement: GOnce, GStaticMutex, GStaticRecMutex,

1
glib/gthreadprivate.h
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@ -58,7 +58,6 @@ G_GNUC_INTERNAL void _g_rand_thread_init (void);
G_GNUC_INTERNAL void _g_main_thread_init (void);
G_GNUC_INTERNAL void _g_atomic_thread_init (void);
G_GNUC_INTERNAL void _g_utils_thread_init (void);
G_GNUC_INTERNAL void _g_futex_thread_init (void);
G_GNUC_INTERNAL void _g_thread_impl_init (void);
G_END_DECLS

6
gthread/tests/1bit-mutex.c
View File

@ -42,7 +42,6 @@
#define g_pointer_bit_lock _emufutex_g_pointer_bit_lock
#define g_pointer_bit_trylock _emufutex_g_pointer_bit_trylock
#define g_pointer_bit_unlock _emufutex_g_pointer_bit_unlock
#define _g_futex_thread_init _emufutex_g_futex_thread_init
#define G_BIT_LOCK_FORCE_FUTEX_EMULATION
@ -121,13 +120,12 @@ testcase (gconstpointer data)
g_thread_init (NULL);
#ifdef TEST_EMULATED_FUTEX
_g_futex_thread_init ();
#define SUFFIX "-emufutex"
/* ensure that we are using the emulated futex by checking
* (at compile-time) for the existance of 'g_futex_mutex'
* (at compile-time) for the existance of 'g_futex_address_list'
*/
g_assert (g_futex_mutex != NULL);
g_assert (g_futex_address_list == NULL);
#else
#define SUFFIX ""
#endif