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63 lines
1.5 KiB
Plaintext
63 lines
1.5 KiB
Plaintext
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zmq_atomic_counter_dec(3)
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=========================
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NAME
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----
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zmq_atomic_counter_dec - decrement an atomic counter
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SYNOPSIS
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--------
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*int zmq_atomic_counter_dec (void *counter);*
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DESCRIPTION
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-----------
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The _zmq_atomic_counter_dec_ function decrements an atomic counter in
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a threadsafe fashion. This function uses platform specific atomic
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operations.
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RETURN VALUE
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------------
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The _zmq_atomic_counter_dec()_ function returns 1 if the counter is
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greater than zero after decrementing, or zero if the counter reached
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zero.
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EXAMPLE
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-------
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.Test code for atomic counters
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----
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void *counter = zmq_atomic_counter_new ();
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assert (zmq_atomic_counter_value (counter) == 0);
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assert (zmq_atomic_counter_inc (counter) == 0);
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assert (zmq_atomic_counter_inc (counter) == 1);
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assert (zmq_atomic_counter_inc (counter) == 2);
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assert (zmq_atomic_counter_value (counter) == 3);
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assert (zmq_atomic_counter_dec (counter) == 1);
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assert (zmq_atomic_counter_dec (counter) == 1);
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assert (zmq_atomic_counter_dec (counter) == 0);
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zmq_atomic_counter_set (counter, 2);
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assert (zmq_atomic_counter_dec (counter) == 1);
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assert (zmq_atomic_counter_dec (counter) == 0);
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zmq_atomic_counter_destroy (&counter);
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return 0;
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----
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SEE ALSO
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--------
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linkzmq:zmq_atomic_counter_new[3]
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linkzmq:zmq_atomic_counter_set[3]
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linkzmq:zmq_atomic_counter_inc[3]
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linkzmq:zmq_atomic_counter_value[3]
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linkzmq:zmq_atomic_counter_destroy[3]
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AUTHORS
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-------
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This page was written by the 0MQ community. To make a change please
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read the 0MQ Contribution Policy at <http://www.zeromq.org/docs:contributing>.
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