zmq_atomic_counter_new man page

zmq_atomic_counter_new ā€” create a new atomic counter

Synopsis

void *zmq_atomic_counter_new (void);

Description

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.

Return Value

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

Authors

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.

Referenced By

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).

01/17/2018 0MQ 4.2.4 0MQ Manual