int reap_threads(torque_ctx *ctx){
int ret = 0;
if(ctx->ev){
ret = reap_thread(ctx->ev->nexttid);
}
return ret;
}
/** @brief Cleans up after a thread, optionally returning the status information
* provided by the thread at the time of exit..
*
* @param tid the target thread
* @param statusp the value passed to thr exit() by the joined thread will be placed
* in the location referenced by statusp.
* @return returns zero on success, and a negative number on error.
*/
int thr_join( int tid, void **statusp )
{
thread_t *thread;
int self_tid;
/* Join on the self, return error */
self_tid = gettid();
if(self_tid == tid)
return ERROR;
/* The thread is not created yet */
thread = get_thread_by_tid(tid);
lprintf("root addr %p\n", thread->stack_base);
if(thread == NULL)
return ERROR;
/*
* Try to join the thread
*/
mutex_lock(&thread->thr_mutex);
/* The thread is not joined, join it */
if (thread->join_thread == INVALID_THREAD){
thread->join_thread = self_tid;
}
/* The thread is joined, return error */
else{
mutex_unlock(&thread->thr_mutex);
return ERROR;
}
/* If the thread is not exited, wait for it to exit */
if(thread->status != EXITED)
cond_wait(&thread->exit_cond, &thread->thr_mutex);
/* Get status */
if(statusp != NULL)
*statusp = thread->exit_status;
mutex_unlock(&thread->thr_mutex);
lprintf("get join %p %d\n", thread->stack_base, (int)*statusp);
/* Reap the thread item */
reap_thread(thread, tid);
return OK;
}
