zmq_atomic_counter_inc - Man Page

increment an atomic counter


int zmq_atomic_counter_inc (void *counter);


The zmq_atomic_counter_inc function increments an atomic counter in a threadsafe fashion. This function uses platform specific atomic operations.

Return Value

The zmq_atomic_counter_inc() function returns the old value of the counter, before incrementing.


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;

See Also

zmq_atomic_counter_new(3) zmq_atomic_counter_set(3) zmq_atomic_counter_dec(3) zmq_atomic_counter_value(3) zmq_atomic_counter_destroy(3)


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Referenced By

zmq(7), zmq_atomic_counter_dec(3), zmq_atomic_counter_destroy(3), zmq_atomic_counter_new(3), zmq_atomic_counter_set(3), zmq_atomic_counter_value(3).

01/17/2018 0MQ 4.2.4 0MQ Manual