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55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
= zmq_atomic_counter_new(3)
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== NAME
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zmq_atomic_counter_new - create a new atomic counter
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== SYNOPSIS
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*void *zmq_atomic_counter_new (void);*
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== DESCRIPTION
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The _zmq_atomic_counter_new_ function creates a new atomic counter. You
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can use this in multithreaded applications to do, for example, reference
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counting of shared objects. The atomic counter is at least 32 bits large.
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This function uses platform specific atomic operations.
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== RETURN VALUE
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The _zmq_atomic_counter_new()_ function returns the new atomic counter
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if successful. Otherwise it returns NULL.
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== EXAMPLE
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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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* xref:zmq_atomic_counter_set.adoc[zmq_atomic_counter_set]
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* xref:zmq_atomic_counter_inc.adoc[zmq_atomic_counter_inc]
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* xref:zmq_atomic_counter_dec.adoc[zmq_atomic_counter_dec]
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* xref:zmq_atomic_counter_value.adoc[zmq_atomic_counter_value]
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* xref:zmq_atomic_counter_destroy.adoc[zmq_atomic_counter_destroy]
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== AUTHORS
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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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