#include <nng/nng.h>
int nng_ctx_id(nng_ctx c);| This documentation is for the TIP (development tree) of NNG and may represent unreleased changes or functionality that is experimental, and is subject to change before release. The latest released version is v1.8.0. See the documentation for v1.8.0 for the most up-to-date information. |
nng_ctx_id(3)
NAME
nng_ctx_id - return numeric context identifier
SYNOPSIS
DESCRIPTION
The nng_ctx_id() function returns a positive identifier for the context c,
if it is valid.
Otherwise it returns -1.
A context is considered valid if it was ever opened with
nng_ctx_open() function.
Contexts that are allocated on the stack or statically should be
initialized with the macro
NNG_CTX_INITIALIZER to ensure that
they cannot be confused with a valid context before they are opened.
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RETURN VALUES
This function returns the positive value for the context identifier, or
-1 if the context is invalid.
ERRORS
None.