NAME¶

nng_ctx_open - create context

SYNOPSIS¶

#include <nng/nng.h>
int nng_ctx_open(nng_ctx *ctxp, nng_socket s);

DESCRIPTION¶

The nng_ctx_open() function creates a separate context to be used with the socket s, and returns it at the location pointed by ctxp.

Contexts allow the independent and concurrent use of stateful operations using the same socket. For example, two different contexts created on a rep socket can each receive requests, and send replies to them, without any regard to or interference with each other.

TIP: Using contexts is an excellent way to write simpler concurrent applications, while retaining the benefits of the protocol-specific advanced processing, avoiding the need to bypass that with raw mode sockets.

RETURN VALUES¶

This function returns 0 on success, and non-zero otherwise.

ERRORS¶

NNG_ENOMEM

NNG_ENOTSUP

SEE ALSO¶

nng_ctx_close(3), nng_ctx_getopt(3), nng_ctx_recv(3), nng_ctx_send(3), nng_ctx_setopt(3), nng_strerror(3), nng_ctx(5), nng_socket(5), nng_rep(7), nng_req(7), nng(7)