zmq_atomic_counter_new - Man Page

void *zmq_atomic_counter_new (void);

The zmq_atomic_counter_new function creates a new atomic counter. You can use this in multithreaded applications to do, for example, reference counting of shared objects. The atomic counter is at least 32 bits large. This function uses platform specific atomic operations.

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

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_set(3) zmq_atomic_counter_inc(3) zmq_atomic_counter_dec(3) zmq_atomic_counter_value(3) zmq_atomic_counter_destroy(3)

This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at http://www.zeromq.org/docs:contributing.

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