[MAN] zmq_atomic_counter_dec

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ZMQ_ATOMIC_COUNTER_D

Section: 0MQ Manual (3)
Updated: 07/10/2019
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NAME

zmq_atomic_counter_dec - decrement an atomic counter  

SYNOPSIS

int zmq_atomic_counter_dec (void *counter);  

DESCRIPTION

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

RETURN VALUE

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

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_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 m[blue]http://www.zeromq.org/docs:contributingm[].

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Index

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUE

EXAMPLE

SEE ALSO

AUTHORS

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