Function wait [src]

Prototype

pub fn wait(sem: *Semaphore) void

Parameters

sem: *Semaphore

Source

  pub fn wait(sem: *Semaphore) void {
    sem.mutex.lock();
    defer sem.mutex.unlock();

    while (sem.permits == 0)
        sem.cond.wait(&sem.mutex);

    sem.permits -= 1;
    if (sem.permits > 0)
        sem.cond.signal();
}  