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gmain: block child sources when blocking the parent

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When blocking a source that has child sources, we need to consider the
children blocked as well. Otherwise they will still trigger repeatedly
in an inner loop started from the parent source's callback.

https://bugzilla.gnome.org/show_bug.cgi?id=669260
This commit is contained in:
Dan Winship 2012-04-11 15:21:17 -04:00
parent b3b32be1e1
commit a49568cecc
1 changed files with 29 additions and 6 deletions
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35
glib/gmain.c
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@ -191,7 +191,8 @@ typedef struct _GSourceCallback GSourceCallback;
typedef enum
{
G_SOURCE_READY = 1 << G_HOOK_FLAG_USER_SHIFT,
G_SOURCE_CAN_RECURSE = 1 << (G_HOOK_FLAG_USER_SHIFT + 1)
G_SOURCE_CAN_RECURSE = 1 << (G_HOOK_FLAG_USER_SHIFT + 1),
G_SOURCE_BLOCKED = 1 << (G_HOOK_FLAG_USER_SHIFT + 2)
} GSourceFlags;
typedef struct _GMainWaiter GMainWaiter;
@ -313,8 +314,7 @@ struct _GSourcePrivate
#define G_THREAD_SELF g_thread_self ()
#define SOURCE_DESTROYED(source) (((source)->flags & G_HOOK_FLAG_ACTIVE) == 0)
#define SOURCE_BLOCKED(source) (((source)->flags & G_HOOK_FLAG_IN_CALL) != 0 && \
((source)->flags & G_SOURCE_CAN_RECURSE) == 0)
#define SOURCE_BLOCKED(source) (((source)->flags & G_SOURCE_BLOCKED) != 0)
#define SOURCE_UNREF(source, context) \
G_STMT_START { \
@ -2426,12 +2426,24 @@ block_source (GSource *source)
g_return_if_fail (!SOURCE_BLOCKED (source));
source->flags |= G_SOURCE_BLOCKED;
tmp_list = source->poll_fds;
while (tmp_list)
{
g_main_context_remove_poll_unlocked (source->context, tmp_list->data);
tmp_list = tmp_list->next;
}
if (source->priv && source->priv->child_sources)
{
tmp_list = source->priv->child_sources;
while (tmp_list)
{
block_source (tmp_list->data);
tmp_list = tmp_list->next;
}
}
}
/* HOLDS: source->context's lock */
@ -2440,15 +2452,27 @@ unblock_source (GSource *source)
{
GSList *tmp_list;
g_return_if_fail (!SOURCE_BLOCKED (source)); /* Source already unblocked */
g_return_if_fail (SOURCE_BLOCKED (source)); /* Source already unblocked */
g_return_if_fail (!SOURCE_DESTROYED (source));
source->flags &= ~G_SOURCE_BLOCKED;
tmp_list = source->poll_fds;
while (tmp_list)
{
g_main_context_add_poll_unlocked (source->context, source->priority, tmp_list->data);
tmp_list = tmp_list->next;
}
if (source->priv && source->priv->child_sources)
{
tmp_list = source->priv->child_sources;
while (tmp_list)
{
unblock_source (tmp_list->data);
tmp_list = tmp_list->next;
}
}
}
/* HOLDS: context's lock */
@ -2527,8 +2551,7 @@ g_main_dispatch (GMainContext *context)
if (!was_in_call)
source->flags &= ~G_HOOK_FLAG_IN_CALL;
if ((source->flags & G_SOURCE_CAN_RECURSE) == 0 &&
!SOURCE_DESTROYED (source))
if (SOURCE_BLOCKED (source) && !SOURCE_DESTROYED (source))
unblock_source (source);
/* Note: this depends on the fact that we can't switch