int mjoin(int thr) {
Tcb *threadToWaitFor;
boolean successBlocking;
initialize();
setYielding(TRUE);
// search thread by id, if found, then block the current and schedule.
if ((threadToWaitFor = getThreadById(thr))) {
successBlocking = changeStateToWaiting(threadToWaitFor);
if (successBlocking) {
saveContext();
// When the thread will be unblocked, it will continue executing HERE
// but the scheduler won't schedule, hence this following call will do nothing
schedule();
return 0;
}
}
// return 0 in case of success, or -1 otherwise
return -1;
}
int munlock (mmutex_t *mutex) {
Tcb *targetThread;
int *waitingThreadId;
initialize();
if (mutex
&& (mutex->flag == Locked)
&& (mutex->ownerThread == getExecutingThread()->id)) {
setFlag(mutex, Free);
waitingThreadId = getFromWaitingQueue(mutex);
if (waitingThreadId) {
targetThread = getThreadById(*waitingThreadId);
if (targetThread) {
changeStateToReady(targetThread);
return 0;
}
} else {
return 0;
}
}
return -1;
}
void geThreadExit(int code){
ge_Thread* thread = NULL;
thread = getThreadById(pthread_self());
if(thread)thread->exit_code=code;
int ret = 0;
pthread_exit(&ret);
if(thread)thread->returned=ret;
}
