wakeup

If @context is currently blocking in method@GLib.MainContext.iteration waiting for a source to become ready, cause it to stop blocking and return. Otherwise, cause the next invocation of method@GLib.MainContext.iteration to return without blocking.

This API is useful for low-level control over struct@GLib.MainContext; for example, integrating it with main loop implementations such as struct@GLib.MainLoop.

Another related use for this function is when implementing a main loop with a termination condition, computed from multiple threads:

|[ #define NUM_TASKS 10 static gint tasks_remaining = NUM_TASKS; // (atomic) ...

while (g_atomic_int_get (&tasks_remaining) != 0) g_main_context_iteration (NULL, TRUE); ]|

Then in a thread: |[ perform_work();

if (g_atomic_int_dec_and_test (&tasks_remaining)) g_main_context_wakeup (NULL); ]|