#include <nng/nng.h>
int nng_ctx_id(nng_ctx c);
This documentation is for version v1.7.3 of NNG, but 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.