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GCancellable: drop lock for callback during connect()

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Don't hold the lock when calling the user's callback during
g_cancellable_connect() for the case that the cancellable has already
fired.

Taken from a patch by Alex Larsson.

Doc updates from Colin Walters.

https://bugzilla.gnome.org/show_bug.cgi?id=705395
This commit is contained in:
Ryan Lortie 2013-10-28 11:44:16 -07:00 committed by Colin Walters
parent 61e8e1cd02
commit c8aba61713
1 changed files with 9 additions and 1 deletions
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10
gio/gcancellable.c
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@ -535,6 +535,11 @@ g_cancellable_cancel (GCancellable *cancellable)
*
* See #GCancellable::cancelled for details on how to use this.
*
* Since GLib 2.40, the lock protecting @cancellable is not held when
* @callback is invoked. This lifts a restriction in place for
* earlier GLib versions which now makes it easier to write cleanup
* code that unconditionally invokes e.g. g_cancellable_cancel().
*
* Returns: The id of the signal handler or 0 if @cancellable has already
* been cancelled.
*
@ -557,6 +562,8 @@ g_cancellable_connect (GCancellable *cancellable,
void (*_callback) (GCancellable *cancellable,
gpointer user_data);
g_mutex_unlock (&cancellable_mutex);
_callback = (void *)callback;
id = 0;
@ -571,9 +578,10 @@ g_cancellable_connect (GCancellable *cancellable,
callback, data,
(GClosureNotify) data_destroy_func,
0);
}
g_mutex_unlock (&cancellable_mutex);
}
return id;
}