60 lines
1.7 KiB
Text
60 lines
1.7 KiB
Text
= nng_cv_alloc(3supp)
|
|
//
|
|
// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
|
|
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
|
|
//
|
|
// This document is supplied under the terms of the MIT License, a
|
|
// copy of which should be located in the distribution where this
|
|
// file was obtained (LICENSE.txt). A copy of the license may also be
|
|
// found online at https://opensource.org/licenses/MIT.
|
|
//
|
|
|
|
== NAME
|
|
|
|
nng_cv_alloc - allocate condition variable
|
|
|
|
== SYNOPSIS
|
|
|
|
[source, c]
|
|
----
|
|
#include <nng/nng.h>
|
|
#include <nng/supplemental/util/platform.h>
|
|
|
|
typedef struct nng_cv nng_cv;
|
|
|
|
int nng_cv_alloc(nng_cv **cvp, nng_mtx *mtx);
|
|
----
|
|
|
|
== DESCRIPTION
|
|
|
|
The `nng_cv_alloc()` function allocates a condition variable, using
|
|
the mutex _mtx_, and returns it in _cvp_.
|
|
|
|
Every condition variable is associated with a mutex, which must be
|
|
owned when a thread waits for the condition using
|
|
xref:nng_cv_wait.3supp.adoc[`nng_cv_wait()`] or
|
|
xref:nng_cv_until.3supp.adoc[`nng_cv_until()`].
|
|
The mutex must also be owned when signaling the condition using the
|
|
xref:nng_cv_wake.3supp.adoc[`nng_cv_wake()`] or
|
|
xref:nng_cv_wake1.3supp.adoc[`nng_cv_wake1()`] functions.
|
|
|
|
== RETURN VALUES
|
|
|
|
This function returns 0 on success, and non-zero otherwise.
|
|
|
|
== ERRORS
|
|
|
|
[horizontal]
|
|
`NNG_ENOMEM`:: Insufficient free memory exists.
|
|
|
|
== SEE ALSO
|
|
|
|
[.text-left]
|
|
xref:nng_cv_free.3supp.adoc[nng_cv_free(3supp)],
|
|
xref:nng_cv_until.3supp.adoc[nng_cv_until(3supp)],
|
|
xref:nng_cv_wait.3supp.adoc[nng_cv_wait(3supp)],
|
|
xref:nng_cv_wake.3supp.adoc[nng_cv_wake(3supp)],
|
|
xref:nng_cv_wake1.3supp.adoc[nng_cv_wake1(3supp)],
|
|
xref:nng_mtx_alloc.3supp.adoc[nng_mtx_alloc(3supp)],
|
|
xref:nng_strerror.3.adoc[nng_strerror(3)],
|
|
xref:nng.7.adoc[nng(7)]
|