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gsignal: Signal connection ids are always > 0 if successful

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Note this explicitly so that people can rely on doing:

if (mystruct->sigid > 0)
  g_signal_disconnect (mystruct->object, mystruct->sigid);

https://bugzilla.gnome.org/show_bug.cgi?id=719809
This commit is contained in:
Colin Walters 2013-12-03 17:15:14 -05:00
parent b2bf13ccdd
commit 8f4dc7012e
2 changed files with 6 additions and 6 deletions
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6
gobject/gsignal.c
View File

@ -2256,7 +2256,7 @@ g_signal_get_invocation_hint (gpointer instance)
*
* Connects a closure to a signal for a particular object.
*
* Returns: the handler id
* Returns: the handler id (always greater than 0 for successful connections)
*/
gulong
g_signal_connect_closure_by_id (gpointer instance,
@ -2315,7 +2315,7 @@ g_signal_connect_closure_by_id (gpointer instance,
*
* Connects a closure to a signal for a particular object.
*
* Returns: the handler id
* Returns: the handler id (always greater than 0 for successful connections)
*/
gulong
g_signal_connect_closure (gpointer instance,
@ -2408,7 +2408,7 @@ node_check_deprecated (const SignalNode *node)
* used. Specify @connect_flags if you need <literal>..._after()</literal> or
* <literal>..._swapped()</literal> variants of this function.
*
* Returns: the handler id
* Returns: the handler id (always greater than 0 for successful connections)
*/
gulong
g_signal_connect_data (gpointer instance,

6
gobject/gsignal.h
View File

@ -469,7 +469,7 @@ void g_signal_chain_from_overridden_handler (gpointer instance,
*
* The handler will be called before the default handler of the signal.
*
* Returns: the handler id
* Returns: the handler id (always greater than 0 for successful connections)
*/
#define g_signal_connect(instance, detailed_signal, c_handler, data) \
g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, (GConnectFlags) 0)
@ -484,7 +484,7 @@ void g_signal_chain_from_overridden_handler (gpointer instance,
*
* The handler will be called after the default handler of the signal.
*
* Returns: the handler id
* Returns: the handler id (always greater than 0 for successful connections)
*/
#define g_signal_connect_after(instance, detailed_signal, c_handler, data) \
g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, G_CONNECT_AFTER)
@ -500,7 +500,7 @@ void g_signal_chain_from_overridden_handler (gpointer instance,
* The instance on which the signal is emitted and @data will be swapped when
* calling the handler.
*
* Returns: the handler id
* Returns: the handler id (always greater than 0 for successful connections)
*/
#define g_signal_connect_swapped(instance, detailed_signal, c_handler, data) \
g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, G_CONNECT_SWAPPED)