Merge commit 'e988fee1679536137b87d10e939eff5c1f27c8ab' as 'libs/libzmq'

libs/libzmq/doc/zmq_atomic_counter_dec.txt

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+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>.