Make some changes to the way that GMainContext works:

Sat Jun 30 15:49:10 2001  Owen Taylor  <otaylor@redhat.com>

	* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
	Make some changes to the way that GMainContext works:

	 - a GMainContext is no longer associated with a single
	   thread, but any thread can acquire ownership
	   of thread and iterate.

	 - There is a facility g_main_context_wait() for
	   non-owner-threads to wait either for ownership
	   or for a condition to be broadcast.

	 - For efficiency, GMainLoop just piggybacks of
	   of the loops mutex / condition instead of
	   having a separate mutex/condition for each
	   GMainLoop.

	* glib/gthread.[ch]: Remove hacks to store the thread's
	GMainContext in the GThread structures, since we
	no longer have the GMainContext <=> GThread correspondence.

        * glib/gmain.[ch]: Make g_main_context_wakeup() public
	so someone could completely duplicate GMainLoop
	with the public API.

	* tests/mainloop-test: Fix up to the new API. Decidedly
	doesn't work at the moment, but that may be the IO
	channel changes, or preexisting locking problems.
This commit is contained in:
Owen Taylor 2001-06-30 19:56:47 +00:00 committed by Owen Taylor
parent c88e252950
commit 8951f96c50
12 changed files with 699 additions and 206 deletions

View File

@ -1,3 +1,33 @@
Sat Jun 30 15:49:10 2001 Owen Taylor <otaylor@redhat.com>
* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
Make some changes to the way that GMainContext works:
- a GMainContext is no longer associated with a single
thread, but any thread can acquire ownership
of thread and iterate.
- There is a facility g_main_context_wait() for
non-owner-threads to wait either for ownership
or for a condition to be broadcast.
- For efficiency, GMainLoop just piggybacks of
of the loops mutex / condition instead of
having a separate mutex/condition for each
GMainLoop.
* glib/gthread.[ch]: Remove hacks to store the thread's
GMainContext in the GThread structures, since we
no longer have the GMainContext <=> GThread correspondence.
* glib/gmain.[ch]: Make g_main_context_wakeup() public
so someone could completely duplicate GMainLoop
with the public API.
* tests/mainloop-test: Fix up to the new API. Decidedly
doesn't work at the moment, but that may be the IO
channel changes, or preexisting locking problems.
Sat Jun 30 13:18:28 2001 Owen Taylor <otaylor@redhat.com>
* glib/gstrfuncs.c glib/gstring.h: Try compiling

View File

@ -1,3 +1,33 @@
Sat Jun 30 15:49:10 2001 Owen Taylor <otaylor@redhat.com>
* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
Make some changes to the way that GMainContext works:
- a GMainContext is no longer associated with a single
thread, but any thread can acquire ownership
of thread and iterate.
- There is a facility g_main_context_wait() for
non-owner-threads to wait either for ownership
or for a condition to be broadcast.
- For efficiency, GMainLoop just piggybacks of
of the loops mutex / condition instead of
having a separate mutex/condition for each
GMainLoop.
* glib/gthread.[ch]: Remove hacks to store the thread's
GMainContext in the GThread structures, since we
no longer have the GMainContext <=> GThread correspondence.
* glib/gmain.[ch]: Make g_main_context_wakeup() public
so someone could completely duplicate GMainLoop
with the public API.
* tests/mainloop-test: Fix up to the new API. Decidedly
doesn't work at the moment, but that may be the IO
channel changes, or preexisting locking problems.
Sat Jun 30 13:18:28 2001 Owen Taylor <otaylor@redhat.com>
* glib/gstrfuncs.c glib/gstring.h: Try compiling

View File

@ -1,3 +1,33 @@
Sat Jun 30 15:49:10 2001 Owen Taylor <otaylor@redhat.com>
* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
Make some changes to the way that GMainContext works:
- a GMainContext is no longer associated with a single
thread, but any thread can acquire ownership
of thread and iterate.
- There is a facility g_main_context_wait() for
non-owner-threads to wait either for ownership
or for a condition to be broadcast.
- For efficiency, GMainLoop just piggybacks of
of the loops mutex / condition instead of
having a separate mutex/condition for each
GMainLoop.
* glib/gthread.[ch]: Remove hacks to store the thread's
GMainContext in the GThread structures, since we
no longer have the GMainContext <=> GThread correspondence.
* glib/gmain.[ch]: Make g_main_context_wakeup() public
so someone could completely duplicate GMainLoop
with the public API.
* tests/mainloop-test: Fix up to the new API. Decidedly
doesn't work at the moment, but that may be the IO
channel changes, or preexisting locking problems.
Sat Jun 30 13:18:28 2001 Owen Taylor <otaylor@redhat.com>
* glib/gstrfuncs.c glib/gstring.h: Try compiling

View File

@ -1,3 +1,33 @@
Sat Jun 30 15:49:10 2001 Owen Taylor <otaylor@redhat.com>
* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
Make some changes to the way that GMainContext works:
- a GMainContext is no longer associated with a single
thread, but any thread can acquire ownership
of thread and iterate.
- There is a facility g_main_context_wait() for
non-owner-threads to wait either for ownership
or for a condition to be broadcast.
- For efficiency, GMainLoop just piggybacks of
of the loops mutex / condition instead of
having a separate mutex/condition for each
GMainLoop.
* glib/gthread.[ch]: Remove hacks to store the thread's
GMainContext in the GThread structures, since we
no longer have the GMainContext <=> GThread correspondence.
* glib/gmain.[ch]: Make g_main_context_wakeup() public
so someone could completely duplicate GMainLoop
with the public API.
* tests/mainloop-test: Fix up to the new API. Decidedly
doesn't work at the moment, but that may be the IO
channel changes, or preexisting locking problems.
Sat Jun 30 13:18:28 2001 Owen Taylor <otaylor@redhat.com>
* glib/gstrfuncs.c glib/gstring.h: Try compiling

View File

@ -1,3 +1,33 @@
Sat Jun 30 15:49:10 2001 Owen Taylor <otaylor@redhat.com>
* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
Make some changes to the way that GMainContext works:
- a GMainContext is no longer associated with a single
thread, but any thread can acquire ownership
of thread and iterate.
- There is a facility g_main_context_wait() for
non-owner-threads to wait either for ownership
or for a condition to be broadcast.
- For efficiency, GMainLoop just piggybacks of
of the loops mutex / condition instead of
having a separate mutex/condition for each
GMainLoop.
* glib/gthread.[ch]: Remove hacks to store the thread's
GMainContext in the GThread structures, since we
no longer have the GMainContext <=> GThread correspondence.
* glib/gmain.[ch]: Make g_main_context_wakeup() public
so someone could completely duplicate GMainLoop
with the public API.
* tests/mainloop-test: Fix up to the new API. Decidedly
doesn't work at the moment, but that may be the IO
channel changes, or preexisting locking problems.
Sat Jun 30 13:18:28 2001 Owen Taylor <otaylor@redhat.com>
* glib/gstrfuncs.c glib/gstring.h: Try compiling

View File

@ -1,3 +1,33 @@
Sat Jun 30 15:49:10 2001 Owen Taylor <otaylor@redhat.com>
* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
Make some changes to the way that GMainContext works:
- a GMainContext is no longer associated with a single
thread, but any thread can acquire ownership
of thread and iterate.
- There is a facility g_main_context_wait() for
non-owner-threads to wait either for ownership
or for a condition to be broadcast.
- For efficiency, GMainLoop just piggybacks of
of the loops mutex / condition instead of
having a separate mutex/condition for each
GMainLoop.
* glib/gthread.[ch]: Remove hacks to store the thread's
GMainContext in the GThread structures, since we
no longer have the GMainContext <=> GThread correspondence.
* glib/gmain.[ch]: Make g_main_context_wakeup() public
so someone could completely duplicate GMainLoop
with the public API.
* tests/mainloop-test: Fix up to the new API. Decidedly
doesn't work at the moment, but that may be the IO
channel changes, or preexisting locking problems.
Sat Jun 30 13:18:28 2001 Owen Taylor <otaylor@redhat.com>
* glib/gstrfuncs.c glib/gstring.h: Try compiling

View File

@ -1,3 +1,33 @@
Sat Jun 30 15:49:10 2001 Owen Taylor <otaylor@redhat.com>
* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
Make some changes to the way that GMainContext works:
- a GMainContext is no longer associated with a single
thread, but any thread can acquire ownership
of thread and iterate.
- There is a facility g_main_context_wait() for
non-owner-threads to wait either for ownership
or for a condition to be broadcast.
- For efficiency, GMainLoop just piggybacks of
of the loops mutex / condition instead of
having a separate mutex/condition for each
GMainLoop.
* glib/gthread.[ch]: Remove hacks to store the thread's
GMainContext in the GThread structures, since we
no longer have the GMainContext <=> GThread correspondence.
* glib/gmain.[ch]: Make g_main_context_wakeup() public
so someone could completely duplicate GMainLoop
with the public API.
* tests/mainloop-test: Fix up to the new API. Decidedly
doesn't work at the moment, but that may be the IO
channel changes, or preexisting locking problems.
Sat Jun 30 13:18:28 2001 Owen Taylor <otaylor@redhat.com>
* glib/gstrfuncs.c glib/gstring.h: Try compiling

View File

@ -1,3 +1,33 @@
Sat Jun 30 15:49:10 2001 Owen Taylor <otaylor@redhat.com>
* glib/gmain.[ch]: (Mostly patch from Sebastian Wilhemi)
Make some changes to the way that GMainContext works:
- a GMainContext is no longer associated with a single
thread, but any thread can acquire ownership
of thread and iterate.
- There is a facility g_main_context_wait() for
non-owner-threads to wait either for ownership
or for a condition to be broadcast.
- For efficiency, GMainLoop just piggybacks of
of the loops mutex / condition instead of
having a separate mutex/condition for each
GMainLoop.
* glib/gthread.[ch]: Remove hacks to store the thread's
GMainContext in the GThread structures, since we
no longer have the GMainContext <=> GThread correspondence.
* glib/gmain.[ch]: Make g_main_context_wakeup() public
so someone could completely duplicate GMainLoop
with the public API.
* tests/mainloop-test: Fix up to the new API. Decidedly
doesn't work at the moment, but that may be the IO
channel changes, or preexisting locking problems.
Sat Jun 30 13:18:28 2001 Owen Taylor <otaylor@redhat.com>
* glib/gstrfuncs.c glib/gstring.h: Try compiling

View File

@ -73,16 +73,31 @@ typedef enum
G_SOURCE_CAN_RECURSE = 1 << (G_HOOK_FLAG_USER_SHIFT + 1)
} GSourceFlags;
#ifdef G_THREADS_ENABLED
typedef struct _GMainWaiter GMainWaiter;
struct _GMainWaiter
{
GCond *cond;
GMutex *mutex;
};
#endif
struct _GMainContext
{
#ifdef G_THREADS_ENABLED
/* The following lock is used for both the list of sources
* and the list of poll records
*/
GMutex *mutex;
GThread *thread;
GStaticMutex mutex;
GCond *cond;
GThread *owner;
guint owner_count;
GSList *waiters;
#endif
guint ref_count;
GPtrArray *pending_dispatches;
gint timeout; /* Timeout for current iteration */
@ -132,11 +147,6 @@ struct _GMainLoop
GMainContext *context;
gboolean is_running;
guint ref_count;
#ifdef G_THREADS_ENABLED
GMutex *mutex;
GCond *sem_cond;
#endif /* G_THREADS_ENABLED */
};
struct _GTimeoutSource
@ -154,15 +164,13 @@ struct _GPollRec
};
#ifdef G_THREADS_ENABLED
#define LOCK_CONTEXT(context) g_mutex_lock(context->mutex)
#define UNLOCK_CONTEXT(context) g_mutex_unlock(context->mutex)
#define LOCK_LOOP(loop) g_mutex_lock(loop->mutex)
#define UNLOCK_LOOP(loop) g_mutex_unlock(loop->mutex)
#define LOCK_CONTEXT(context) g_static_mutex_lock (&context->mutex)
#define UNLOCK_CONTEXT(context) g_static_mutex_unlock (&context->mutex)
#define G_THREAD_SELF g_thread_self ()
#else
#define LOCK_CONTEXT(context) (void)0
#define UNLOCK_CONTEXT(context) (void)0
#define LOCK_LOOP(context) (void)0
#define UNLOCK_LOOP(context) (void)0
#define G_THREAD_SELF NULL
#endif
#define SOURCE_DESTROYED(source) (((source)->flags & G_HOOK_FLAG_ACTIVE) == 0)
@ -194,7 +202,7 @@ static void g_main_context_add_poll_unlocked (GMainContext *context,
GPollFD *fd);
static void g_main_context_remove_poll_unlocked (GMainContext *context,
GPollFD *fd);
static void g_main_context_wakeup (GMainContext *context);
static void g_main_context_wakeup_unlocked (GMainContext *context);
static gboolean g_timeout_prepare (GSource *source,
gint *timeout);
@ -494,17 +502,38 @@ g_poll (GPollFD *fds,
#endif /* !HAVE_POLL */
/* Called to clean up when a thread terminates
*/
/**
* g_main_context_ref:
* @loop: a #GMainContext
*
* Increases the reference count on a #GMainContext object by one.
**/
void
g_main_context_destroy (GMainContext *context)
g_main_context_ref (GMainContext *context)
{
g_return_if_fail (context != NULL);
g_return_if_fail (context->ref_count > 0);
LOCK_CONTEXT (context);
context->ref_count++;
UNLOCK_CONTEXT (context);
}
static void
g_main_context_unref_and_unlock (GMainContext *context)
{
GSource *source;
/* We need the lock here only because g_source_destroy expects
* to be able to unlock when destroying the source's data
*/
LOCK_CONTEXT (context);
context->ref_count--;
if (context->ref_count != 0)
{
UNLOCK_CONTEXT (context);
return;
}
source = context->source_list;
while (source)
{
@ -515,7 +544,7 @@ g_main_context_destroy (GMainContext *context)
UNLOCK_CONTEXT (context);
#ifdef G_THREADS_ENABLED
g_mutex_free (context->mutex);
g_static_mutex_free (&context->mutex);
#endif
g_ptr_array_free (context->pending_dispatches, TRUE);
@ -538,49 +567,44 @@ g_main_context_destroy (GMainContext *context)
g_free (context);
}
/* This is an imcomplete (only the members up till context) version of
* GRealThread from gthread.h. Keep them in sync */
typedef struct _GRealThread GRealThread;
struct _GRealThread
/**
* g_main_context_unref:
* @loop: a #GMainContext
*
* Decreases the reference count on a #GMainContext object by one. If
* the result is zero, free the context and free all associated memory.
**/
void
g_main_context_unref (GMainContext *context)
{
GThread thread;
GMainContext *context;
};
g_return_if_fail (context != NULL);
g_return_if_fail (context->ref_count > 0);
LOCK_CONTEXT (context);
g_main_context_unref_and_unlock (context);
}
/**
* g_main_context_get:
* @thread: a #GThread
* g_main_context_new:
*
* Retrieves the main loop context for a particular thread. This
* will create the main context for the thread if none previously
* existed. The context will exist until the thread terminates.
* Creates a new #GMainContext strcuture
*
* Return value: the main loop context for @thread.
* Return value: the new #GMainContext
**/
GMainContext *
g_main_context_get (GThread *thread)
g_main_context_new ()
{
GRealThread *real_thread = (GRealThread*)thread;
GMainContext *context;
g_return_val_if_fail (thread != NULL, NULL);
if (g_thread_supported ())
context = real_thread->context;
else
context = default_main_context;
if (!context)
{
context = g_new0 (GMainContext, 1);
GMainContext *context = g_new0 (GMainContext, 1);
#ifdef G_THREADS_ENABLED
if (g_thread_supported ())
context->mutex = g_mutex_new();
g_static_mutex_init (&context->mutex);
context->thread = thread;
context->owner = NULL;
context->waiters = NULL;
#endif
context->ref_count = 1;
context->next_id = 1;
context->source_list = NULL;
@ -624,12 +648,6 @@ g_main_context_get (GThread *thread)
}
#endif
if (g_thread_supported ())
real_thread->context = context;
else
default_main_context = context;
}
return context;
}
@ -650,7 +668,7 @@ g_main_context_default (void)
G_LOCK (main_loop);
if (!default_main_context)
default_main_context = g_main_context_get (g_thread_self ());
default_main_context = g_main_context_new ();
G_UNLOCK (main_loop);
@ -784,7 +802,7 @@ g_source_attach (GSource *source,
#ifdef G_THREADS_ENABLED
/* Now wake up the main loop if it is waiting in the poll() */
g_main_context_wakeup (context);
g_main_context_wakeup_unlocked (context);
#endif
UNLOCK_CONTEXT (context);
@ -1623,6 +1641,177 @@ next_valid_source (GMainContext *context,
return new_source;
}
/**
* g_main_context_acquire:
* @context: a #GMainContext
*
* Tries to become the owner of the specified context.
* If some other context is the owner of the context,
* returns %FALSE immediately. Ownership is properly
* recursive: the owner can require ownership again
* and will release ownership when g_main_context_release()
* is called as many times as g_main_context_acquire().
*
* You must be the owner of a context before you
* can call g_main_context_prepare(), g_main_context_query(),
* g_main_context_check(), g_main_context_dispatch().
*
* Return value: %TRUE if the operation succeeded, and
* this thread is now the owner of @context.
**/
gboolean
g_main_context_acquire (GMainContext *context)
{
#ifdef G_THREAD_ENABLED
gboolean result = FALSE;
GThread *self = G_THREAD_SELF;
if (context == NULL)
context = g_main_context_default ();
LOCK_CONTEXT (context);
if (!context->owner)
context->owner = self;
if (context->owner == self)
{
context->owner_count++;
result = TRUE;
}
UNLOCK_CONTEXT (context);
return result;
#else /* !G_THREAD_ENABLED */
return TRUE;
#endif /* G_THREAD_ENABLED */
}
/**
* g_main_context_release:
* @context: a #GMainContext
*
* Release ownership of a context previously acquired by this thread
* with g_main_context_acquire(). If the context was acquired multiple
* times, the only release ownership when g_main_context_release()
* is called as many times as it was acquired.
**/
void
g_main_context_release (GMainContext *context)
{
#ifdef G_THREAD_ENABLED
GMainWaiter *waiter_to_notify = NULL;
if (context == NULL)
context = g_main_context_default ();
LOCK_CONTEXT (context);
context->owner_count--;
if (context->owner_count == 0)
{
context->owner = NULL;
if (context->waiters)
{
waiter_to_notify = context->waiters;
context->waiters = g_slist_delete_link (context->waiters,
context->waiters);
}
}
if (waiter_to_notify)
{
gboolean loop_internal_waiter =
(waiter_to_notify->mutex == g_static_mutex_get_mutex (&context->mutex));
if (!loop_internal_waiter)
g_mutex_lock (waiter_to_notify->mutex);
g_cond_signal (waiter_to_notify->cond);
if (!loop_internal_waiter)
g_mutex_unlock (waiter_to_notify->mutex);
else
UNLOCK_CONTEXT (context);
}
else
UNLOCK_CONTEXT (context);
return result;
#endif /* G_THREAD_ENABLED */
}
/**
* g_main_context_wait:
* @context: a #GMainContext
* @cond: a condition variable
* @mutex: a mutex, currently held
*
* Tries to become the owner of the specified context,
* as with g_main_context_acquire. But if another thread
* is the owner, atomically drop @mutex and wait on
* @cond until wait until that owner releases
* ownership or until @cond is signaled, then
* try again (once) to become the owner.
*
* Return value: %TRUE if the operation succeeded, and
* this thread is now the owner of @context.
**/
gboolean
g_main_context_wait (GMainContext *context,
GCond *cond,
GMutex *mutex)
{
#ifdef G_THREAD_ENABLED
gboolean result = FALSE;
GThread *self = G_THREAD_SELF;
gboolean loop_internal_waiter;
if (context == NULL)
context = g_main_context_default ();
loop_internal_waiter = (mutex == g_static_mutex_get_mutex (&context->mutex));
if (!loop_internal_waiter)
LOCK_CONTEXT (context);
if (context->owner && context->owner != self)
{
GMainWaiter waiter;
waiter.cond = cond;
waiter.mutex = mutex;
context->waiters = g_slist_append (context->waiters, &waiter);
if (!loop_internal_waiter)
UNLOCK_CONTEXT (context);
g_cond_wait (cond, mutex);
if (!loop_internal_waiter)
LOCK_CONTEXT (context);
context->waiters = g_slist_remove (context->waiters, &waiter);
}
if (!context->owner)
context->owner = self;
if (context->owner == self)
{
context->owner_count++;
result = TRUE;
}
if (!loop_internal_waiter)
UNLOCK_CONTEXT (context);
return result;
#else /* !G_THREAD_ENABLED */
return TRUE;
#endif /* G_THREAD_ENABLED */
}
/**
* g_main_context_prepare:
@ -1943,63 +2132,88 @@ g_main_context_dispatch (GMainContext *context)
UNLOCK_CONTEXT (context);
}
/* HOLDS context lock */
static gboolean
g_main_context_iterate (GMainContext *context,
gboolean block,
gboolean dispatch)
gboolean dispatch,
GThread *self)
{
gint max_priority;
gint timeout;
gboolean some_ready;
gint nfds, new_nfds;
GPollFD *fds;
gint nfds, allocated_nfds;
GPollFD *fds = NULL;
some_ready = g_main_context_prepare (context, &max_priority);
UNLOCK_CONTEXT (context);
do
#ifdef G_THREADS_ENABLED
if (!g_main_context_acquire (context))
{
gboolean got_ownership;
g_return_val_if_fail (g_thread_supported (), FALSE);
if (!block)
return FALSE;
LOCK_CONTEXT (context);
if (!context->cond)
context->cond = g_cond_new ();
got_ownership = g_main_context_wait (context,
context->cond,
g_static_mutex_get_mutex (&context->mutex));
if (!got_ownership)
{
UNLOCK_CONTEXT (context);
return FALSE;
}
}
else
LOCK_CONTEXT (context);
#endif G_THREADS_ENABLED
if (!context->cached_poll_array)
{
context->cached_poll_array_size = context->n_poll_records;
context->cached_poll_array = g_new (GPollFD, context->n_poll_records);
}
allocated_nfds = context->cached_poll_array_size;
fds = context->cached_poll_array;
UNLOCK_CONTEXT (context);
some_ready = g_main_context_prepare (context, &max_priority);
while ((nfds = g_main_context_query (context, max_priority, &timeout, fds,
allocated_nfds)) > allocated_nfds)
{
LOCK_CONTEXT (context);
if (context->cached_poll_array)
{
nfds = context->cached_poll_array_size;
fds = context->cached_poll_array;
context->cached_poll_array = NULL;
}
else
{
nfds = context->cached_poll_array_size = context->n_poll_records;
fds = g_new (GPollFD, nfds);
}
g_free (fds);
context->cached_poll_array_size = allocated_nfds = nfds;
context->cached_poll_array = fds = g_new (GPollFD, nfds);
UNLOCK_CONTEXT (context);
new_nfds = g_main_context_query (context, max_priority,
&timeout, fds, nfds);
}
while (new_nfds > nfds);
if (!block)
timeout = 0;
g_main_context_poll (context, timeout, max_priority,
fds, new_nfds);
g_main_context_check (context,
max_priority,
fds, new_nfds);
LOCK_CONTEXT (context);
g_assert (!context->cached_poll_array);
g_main_context_poll (context, timeout, max_priority, fds, nfds);
context->cached_poll_array = fds;
context->cached_poll_array_size = nfds;
UNLOCK_CONTEXT (context);
g_main_context_check (context, max_priority, fds, nfds);
if (dispatch)
g_main_context_dispatch (context);
#ifdef G_THREADS_ENABLED
g_main_context_release (context);
#endif /* G_THREADS_ENABLED */
LOCK_CONTEXT (context);
return some_ready;
}
@ -2015,10 +2229,16 @@ g_main_context_iterate (GMainContext *context,
gboolean
g_main_context_pending (GMainContext *context)
{
gboolean retval;
if (!context)
context = g_main_context_default();
LOCK_CONTEXT (context);
retval = g_main_context_iterate (context, FALSE, FALSE, G_THREAD_SELF);
UNLOCK_CONTEXT (context);
return g_main_context_iterate (context, FALSE, FALSE);
return retval;
}
/**
@ -2040,10 +2260,16 @@ g_main_context_pending (GMainContext *context)
gboolean
g_main_context_iteration (GMainContext *context, gboolean may_block)
{
gboolean retval;
if (!context)
context = g_main_context_default();
return g_main_context_iterate (context, may_block, TRUE);
LOCK_CONTEXT (context);
retval = g_main_context_iterate (context, may_block, TRUE, G_THREAD_SELF);
UNLOCK_CONTEXT (context);
return retval;
}
/**
@ -2066,19 +2292,13 @@ g_main_loop_new (GMainContext *context,
if (!context)
context = g_main_context_default();
g_main_context_ref (context);
loop = g_new0 (GMainLoop, 1);
loop->context = context;
loop->is_running = is_running != FALSE;
loop->ref_count = 1;
#ifdef G_THREADS_ENABLED
if (g_thread_supported ())
loop->mutex = g_mutex_new ();
else
loop->mutex = NULL;
loop->sem_cond = NULL;
#endif /* G_THREADS_ENABLED */
return loop;
}
@ -2094,24 +2314,29 @@ GMainLoop *
g_main_loop_ref (GMainLoop *loop)
{
g_return_val_if_fail (loop != NULL, NULL);
g_return_val_if_fail (loop->ref_count > 0, NULL);
LOCK_LOOP (loop);
LOCK_CONTEXT (loop->context);
loop->ref_count++;
UNLOCK_LOOP (loop);
UNLOCK_CONTEXT (loop->context);
return loop;
}
static void
main_loop_destroy (GMainLoop *loop)
g_main_loop_unref_and_unlock (GMainLoop *loop)
{
#ifdef G_THREADS_ENABLED
g_mutex_free (loop->mutex);
if (loop->sem_cond)
g_cond_free (loop->sem_cond);
#endif /* G_THREADS_ENABLED */
loop->ref_count--;
if (loop->ref_count == 0)
{
/* When the ref_count is 0, there can be nobody else using the
* loop, so it is safe to unlock before destroying.
*/
g_main_context_unref_and_unlock (loop->context);
g_free (loop);
}
else
UNLOCK_CONTEXT (loop->context);
}
/**
@ -2127,19 +2352,9 @@ g_main_loop_unref (GMainLoop *loop)
g_return_if_fail (loop != NULL);
g_return_if_fail (loop->ref_count > 0);
LOCK_LOOP (loop);
LOCK_CONTEXT (loop->context);
loop->ref_count--;
if (loop->ref_count == 0)
{
/* When the ref_count is 0, there can be nobody else using the
* loop, so it is safe to unlock before destroying.
*/
UNLOCK_LOOP (loop);
main_loop_destroy (loop);
}
else
UNLOCK_LOOP (loop);
g_main_loop_unref_and_unlock (loop);
}
/**
@ -2154,70 +2369,71 @@ g_main_loop_unref (GMainLoop *loop)
void
g_main_loop_run (GMainLoop *loop)
{
GThread *self = G_THREAD_SELF;
g_return_if_fail (loop != NULL);
g_return_if_fail (loop->ref_count > 0);
/* The assumption here is that a reference is held to the loop
* until we recursively iterate
*/
#ifdef G_THREADS_ENABLED
if (loop->context->thread != g_thread_self ())
if (!g_main_context_acquire (loop->context))
{
LOCK_LOOP (loop);
loop->ref_count++;
gboolean got_ownership = FALSE;
/* Another thread owns this context */
if (!g_thread_supported ())
{
g_warning ("g_main_loop_run() was called from second thread but"
"g_thread_init() was never called.");
}
else
{
if (!loop->sem_cond)
loop->sem_cond = g_cond_new ();
if (!loop->is_running)
loop->is_running = TRUE;
while (loop->is_running)
g_cond_wait (loop->sem_cond, loop->mutex);
}
}
else
#endif /* G_THREADS_ENABLED */
{
LOCK_CONTEXT (loop->context);
if (loop->context->in_check_or_prepare)
{
g_warning ("g_main_run(): called recursively from within a source's check() or "
"prepare() member, iteration not possible.");
UNLOCK_CONTEXT (loop->context);
return;
}
UNLOCK_CONTEXT (loop->context);
LOCK_LOOP (loop);
LOCK_CONTEXT (loop->context);
loop->ref_count++;
loop->is_running = TRUE;
while (loop->is_running)
{
UNLOCK_LOOP (loop);
g_main_context_iterate (loop->context, TRUE, TRUE);
LOCK_LOOP (loop);
}
}
/* We inline this here rather than calling g_main_loop_unref() to
* avoid an extra unlock/lock.
*/
loop->ref_count--;
if (loop->ref_count == 0)
{
UNLOCK_LOOP (loop);
main_loop_destroy (loop);
if (!loop->is_running)
loop->is_running = TRUE;
if (!loop->context->cond)
loop->context->cond = g_cond_new ();
while (loop->is_running || !got_ownership)
got_ownership = g_main_context_wait (loop->context,
loop->context->cond,
g_static_mutex_get_mutex (&loop->context->mutex));
if (!loop->is_running)
{
if (got_ownership)
g_main_context_release (loop->context);
g_main_loop_unref_and_unlock (loop);
return;
}
g_assert (got_ownership);
}
else
UNLOCK_LOOP (loop);
LOCK_CONTEXT (loop->context);
#endif /* G_THREADS_ENABLED */
if (loop->context->in_check_or_prepare)
{
g_warning ("g_main_run(): called recursively from within a source's check() or "
"prepare() member, iteration not possible.");
return;
}
loop->ref_count++;
loop->is_running = TRUE;
while (loop->is_running)
g_main_context_iterate (loop->context, TRUE, TRUE, self);
#ifdef G_THREADS_ENABLED
g_main_context_release (loop->context);
#endif /* G_THREADS_ENABLED */
g_main_loop_unref_and_unlock (loop);
}
/**
@ -2231,20 +2447,14 @@ void
g_main_loop_quit (GMainLoop *loop)
{
g_return_if_fail (loop != NULL);
LOCK_LOOP (loop);
loop->is_running = FALSE;
#ifdef G_THREADS_ENABLED
if (loop->sem_cond)
g_cond_broadcast (loop->sem_cond);
#endif
UNLOCK_LOOP (loop);
g_return_if_fail (loop->ref_count > 0);
LOCK_CONTEXT (loop->context);
g_main_context_wakeup (loop->context);
loop->is_running = FALSE;
g_main_context_wakeup_unlocked (loop->context);
if (loop->context->cond)
g_cond_broadcast (loop->context->cond);
UNLOCK_CONTEXT (loop->context);
}
@ -2259,15 +2469,27 @@ g_main_loop_quit (GMainLoop *loop)
gboolean
g_main_loop_is_running (GMainLoop *loop)
{
gboolean result;
g_return_val_if_fail (loop != NULL, FALSE);
g_return_val_if_fail (loop->ref_count > 0, FALSE);
LOCK_LOOP (loop);
result = loop->is_running;
UNLOCK_LOOP (loop);
return loop->is_running;
}
return result;
/**
* g_main_loop_get_context:
* @loop: a #GMainLoop.
*
* Returns the #GMainContext of @loop.
*
* Return value: the #GMainContext of @loop
**/
GMainContext *
g_main_loop_get_context (GMainLoop *loop)
{
g_return_val_if_fail (loop != NULL, NULL);
g_return_val_if_fail (loop->ref_count > 0, NULL);
return loop->context;
}
/* HOLDS: context's lock */
@ -2365,6 +2587,9 @@ g_main_context_add_poll (GMainContext *context,
if (!context)
context = g_main_context_default ();
g_return_if_fail (context->ref_count > 0);
g_return_if_fail (fd);
LOCK_CONTEXT (context);
g_main_context_add_poll_unlocked (context, priority, fd);
UNLOCK_CONTEXT (context);
@ -2421,7 +2646,7 @@ g_main_context_add_poll_unlocked (GMainContext *context,
context->poll_changed = TRUE;
/* Now wake up the main loop if it is waiting in the poll() */
g_main_context_wakeup (context);
g_main_context_wakeup_unlocked (context);
#endif
}
@ -2440,10 +2665,11 @@ g_main_context_remove_poll (GMainContext *context,
if (!context)
context = g_main_context_default ();
LOCK_CONTEXT (context);
g_return_if_fail (context->ref_count > 0);
g_return_if_fail (fd);
LOCK_CONTEXT (context);
g_main_context_remove_poll_unlocked (context, fd);
UNLOCK_CONTEXT (context);
}
@ -2483,7 +2709,7 @@ g_main_context_remove_poll_unlocked (GMainContext *context,
context->poll_changed = TRUE;
/* Now wake up the main loop if it is waiting in the poll() */
g_main_context_wakeup (context);
g_main_context_wakeup_unlocked (context);
#endif
}
@ -2540,6 +2766,8 @@ g_main_context_set_poll_func (GMainContext *context,
if (!context)
context = g_main_context_default ();
g_return_if_fail (context->ref_count > 0);
LOCK_CONTEXT (context);
if (func)
@ -2572,6 +2800,8 @@ g_main_context_get_poll_func (GMainContext *context)
if (!context)
context = g_main_context_default ();
g_return_val_if_fail (context->ref_count > 0, NULL);
LOCK_CONTEXT (context);
result = context->poll_func;
UNLOCK_CONTEXT (context);
@ -2582,7 +2812,7 @@ g_main_context_get_poll_func (GMainContext *context)
/* HOLDS: context's lock */
/* Wake the main loop up from a poll() */
static void
g_main_context_wakeup (GMainContext *context)
g_main_context_wakeup_unlocked (GMainContext *context)
{
#ifdef G_THREADS_ENABLED
if (g_thread_supported() && context->poll_waiting)
@ -2597,6 +2827,26 @@ g_main_context_wakeup (GMainContext *context)
#endif
}
/**
* g_main_context_wakeup:
* @context: a #GMainContext
*
* If @context is currently waiting in a poll(), interrupt
* the poll(), and continue the iteration process.
**/
void
g_main_context_wakeup (GMainContext *context)
{
if (!context)
context = g_main_context_default ();
g_return_if_fail (context->ref_count > 0);
LOCK_CONTEXT (context);
g_main_context_wakeup_unlocked (context);
UNLOCK_CONTEXT (context);
}
/* Timeouts */
static void

View File

@ -124,7 +124,9 @@ struct _GPollFD
/* GMainContext: */
GMainContext *g_main_context_get (GThread *thread);
GMainContext *g_main_context_new (void);
void g_main_context_ref (GMainContext *context);
void g_main_context_unref (GMainContext *context);
GMainContext *g_main_context_default (void);
gboolean g_main_context_iteration (GMainContext *context,
@ -143,6 +145,13 @@ GSource *g_main_context_find_source_by_funcs_user_data (GMainContext *conte
/* Low level functions for implementing custom main loops.
*/
void g_main_context_wakeup (GMainContext *context);
gboolean g_main_context_acquire (GMainContext *context);
void g_main_context_release (GMainContext *context);
gboolean g_main_context_wait (GMainContext *context,
GCond *cond,
GMutex *mutex);
gboolean g_main_context_prepare (GMainContext *context,
gint *priority);
gint g_main_context_query (GMainContext *context,
@ -177,6 +186,7 @@ void g_main_loop_quit (GMainLoop *loop);
GMainLoop *g_main_loop_ref (GMainLoop *loop);
void g_main_loop_unref (GMainLoop *loop);
gboolean g_main_loop_is_running (GMainLoop *loop);
GMainContext *g_main_loop_get_context (GMainLoop *loop);
/* GSource: */

View File

@ -74,7 +74,6 @@ typedef struct _GRealThread GRealThread;
struct _GRealThread
{
GThread thread;
GMainContext *context;
gpointer private_data;
gpointer retval;
GSystemThread system_thread;
@ -465,8 +464,6 @@ g_static_private_free (GStaticPrivate *private_key)
G_UNLOCK (g_thread);
}
void g_main_context_destroy (GMainContext *context);
static void
g_thread_cleanup (gpointer data)
{
@ -487,8 +484,6 @@ g_thread_cleanup (gpointer 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 */
@ -560,7 +555,6 @@ g_thread_create_full (GThreadFunc func,
result->thread.func = func;
result->thread.data = data;
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,
@ -657,7 +651,6 @@ g_thread_self (void)
thread->thread.func = NULL;
thread->thread.data = NULL;
thread->private_data = NULL;
thread->context = NULL;
if (g_thread_supported ())
G_THREAD_UF (thread_self, (&thread->system_thread));

View File

@ -133,7 +133,7 @@ adder_thread (gpointer data)
GIOChannel **channels = data;
AddrData addr_data;
context = g_main_context_get (g_thread_self());
context = g_main_context_new ();
g_mutex_lock (context_array_mutex);