zmq_atomic_counter_value(3)

zmq_atomic_counter_value(3)

ØMQ Manual - ØMQ/4.2.2

Name

zmq_atomic_counter_value - return value of atomic counter

Synopsis

int zmq_atomic_counter_value (void *counter);

Description

The zmq_atomic_counter_value function returns the value of an atomic counter. This function uses platform specific atomic operations.

Return value

The zmq_atomic_counter_value() function returns the new atomic counter if successful. Otherwise it returns NULL.

Example

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_inc(3) zmq_atomic_counter_dec(3) zmq_atomic_counter_destroy(3)

Authors

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