nng_ctx_id(3)

NAME

nng_ctx_id - return numeric context identifier

#include <nng/nng.h>

int nng_ctx_id(nng_ctx c);

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.

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

None.