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gsource: document priority of child sources

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Add a note to the documentation that child sources cannot have their priority
changed independently from their parent.  Add a g_return_if_fail() to the
public API in order to enforce this.

This was already a reality due to the check in
g_source_set_priority_unlocked(), but it was never explicitly documented.

https://bugzilla.gnome.org/show_bug.cgi?id=724706
This commit is contained in:
Ryan Lortie 2014-02-13 10:18:03 -05:00
parent 8491f03581
commit 0415930b49
1 changed files with 5 additions and 0 deletions
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5
glib/gmain.c
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@ -1706,6 +1706,10 @@ g_source_set_priority_unlocked (GSource *source,
* source will be dispatched if it is ready to be dispatched and no
* sources at a higher (numerically smaller) priority are ready to be
* dispatched.
*
* A child source always has the same priority as its parent. It is not
* permitted to change the priority of a source once it has been added
* as a child of another source.
**/
void
g_source_set_priority (GSource *source,
@ -1714,6 +1718,7 @@ g_source_set_priority (GSource *source,
GMainContext *context;
g_return_if_fail (source != NULL);
g_return_if_fail (source->priv->parent_source == NULL);
context = source->context;