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.

    Note

    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

nng_ctx(5), nng(7)