mirror of
https://github.com/zeromq/libzmq.git
synced 2024-12-27 15:41:05 +08:00
04664f0ef7
zmq_atomic_counter_dec returned a 'bool' value, yet this isn't defined by standard, so causes compile errors in upstream code. Solution: return an int that can be safely converted to bool if needed by bindings.
63 lines
1.5 KiB
Plaintext
63 lines
1.5 KiB
Plaintext
zmq_atomic_counter_dec(3)
|
|
=========================
|
|
|
|
|
|
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
|
|
--------
|
|
linkzmq:zmq_atomic_counter_new[3]
|
|
linkzmq:zmq_atomic_counter_set[3]
|
|
linkzmq:zmq_atomic_counter_inc[3]
|
|
linkzmq:zmq_atomic_counter_value[3]
|
|
linkzmq: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>.
|