table of contents
| NNG_CTX_ID(3) | NNG Reference Manual | 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)
| 2024-05-31 |