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| -rw-r--r-- | glib/gmain.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/glib/gmain.h b/glib/gmain.h index 2515d7326..fa2abf5ea 100644 --- a/glib/gmain.h +++ b/glib/gmain.h @@ -169,6 +169,21 @@ typedef struct _GSourceFuncs GSourceFuncs; typedef gboolean (*GSourceFunc) (gpointer user_data); /** + * G_SOURCE_FUNC: + * @f: a function pointer. + * + * Cast a function pointer to a #GSourceFunc, suppressing warnings from recent + * versions of GCC about the function types being incompatible. + * + * For example, the correct type of callback for a source created by + * g_child_watch_source_new() is #GChildWatchFunc, which accepts more arguments + * than #GSourceFunc. Casting it with `(GSourceFunc)` to call + * g_source_set_callback() will trigger a warning, even though it will be cast + * back to the correct type before it is called by the source. + */ +#define G_SOURCE_FUNC(f) ((GSourceFunc) (void (*)(void)) (f)) + +/** * GChildWatchFunc: * @pid: the process id of the child process * @status: Status information about the child process, encoded |