Manpages - zmq_atomic_counter_dec.3

zmq_atomic_counter_dec - decrement an atomic counter

int zmq_atomic_counter_dec (void *counter);

The zmq_atomic_counter_dec function decrements an atomic counter in a threadsafe fashion. This function uses platform specific atomic operations.

The zmq_atomic_counter_dec() function returns 1 if the counter is greater than zero after decrementing, or zero if the counter reached zero.

Test code for atomic counters.

    void *counter = zmq_atomic_counter_new ();
    assert (zmq_atomic_counter_value (counter) == 0);
    assert (zmq_atomic_counter_inc (counter) == 0);
    assert (zmq_atomic_counter_inc (counter) == 1);
    assert (zmq_atomic_counter_inc (counter) == 2);
    assert (zmq_atomic_counter_value (counter) == 3);
    assert (zmq_atomic_counter_dec (counter) == 1);
    assert (zmq_atomic_counter_dec (counter) == 1);
    assert (zmq_atomic_counter_dec (counter) == 0);
    zmq_atomic_counter_set (counter, 2);
    assert (zmq_atomic_counter_dec (counter) == 1);
    assert (zmq_atomic_counter_dec (counter) == 0);
    zmq_atomic_counter_destroy (&counter);
    return 0;

*zmq_atomic_counter_new*(3) *zmq_atomic_counter_set*(3) *zmq_atomic_counter_inc*(3) *zmq_atomic_counter_value*(3) *zmq_atomic_counter_destroy*(3)

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