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 v1.3.2. See the documentation for v1.3.2 for the most up-to-date information.

nng_ctx_id(3)

NAME

nng_ctx_id - return numeric context identifier

SYNOPSIS

#include <nng/nng.h>

int nng_ctx_id(nng_ctx c);

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.

RETURN VALUES

This function returns the positive value for the context identifier, or -1 if the context is invalid.

ERRORS

None.

SEE ALSO