On 5 July 2012 14:26, David Buchan <pdbuc...@yahoo.com> wrote:
> Is there a way to have a (non-main iteration) thread issue a signal when it
> ends?
>
> I start up a timeout and an idle function when I spawn a new thread.
> I want the main iteration to stop the timeout and idle function as soon as
> the new thread is finished and disappears.
You can use g_idle_add() to send a message from the worker to the main thread.
The worker might end like this:
worker_thread( .. )
{
..
final_bit_of_work();
g_idle_add( thread_done_cb, myself);
return NULL;
}
and the main thread cleans up and stops like this:
gboolean
thread_done_cb(Worker *worker)
{
// unlink the main thread from the worker
g_source_remove(worker->timeout_sid);
// wait for the worker to finish
g_thread_join(worker->gthread);
// all done!
worker_free(worker);
return FALSE;
}
Or perhaps you mean something more complicated and I've misunderstood
:( I use semaphores for hairier thread synchronisation problems.
http://en.wikipedia.org/wiki/Semaphore_%28programming%29
I have a set of simple semaphore functions over the g_thread primitives:
https://github.com/jcupitt/libvips/blob/master/libvips/iofuncs/semaphore.c
John
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