pthreads - Correctly waiting for a thread to terminate in C -


this code plays sound clip creating thread it. when bleep() runs, sets global variable bleep_playing true. in main loop, if notices bleep_playing has been set false, terminates loop, cleans (closing files, freeing buffers), , exits. don't know correct way wait detached thread finish. pthread_join() doesn't job. while loop here continually checks bleep_id see if it's valid. when isn't, execution continues. correct , portable way tell thread clean , terminate before next thread allowed created?

    if (bleep_playing) {         bleep_playing = false;         while (pthread_kill(bleep_id, 0) == 0) {             /* nothing */         }     }     err = pthread_create(&bleep_id, &attr, (void *) &bleep, &effect);

i

hmm... pthread_join should job. far remember thread has call pthread_exit...?

/* bleep thread */ void *bleep(void *) {     /* bleeping */      pthread_exit(null); }   /* main thread */  if (pthread_create(&thread, ..., bleep, ...) == 0) {     /*     **  try sleeping ms !!!     **  i've had issues on multi core cpus requiring sleep     **  in order created thread "exist"...     */      pthread_join(&thread, null); }

anyway if isn't doing thing shouldn't poll global variable since eat cpu. instead create mutex (pthread_mutex_*-functions) locked , freed "bleep thread". in main thread can wait mutex makes thread sleep until "bleep thread" frees mutex.

(or quick & , dirty: sleep small amount of time while waiting bleep_playing becoming false)


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