SYNOPSIS
#include <nng/nng.h>
int nng_msg_alloc(nng_msg **msgp, size_t size);DESCRIPTION
The nng_msg_alloc() function allocates a new message with body length size
and stores the result in msgp.
Messages allocated with this function contain a body and optionally a header.
They are used with receive and transmit functions.
RETURN VALUES
This function returns 0 on success, and non-zero otherwise.
ERRORS
NNG_ENOMEM-
Insufficient free memory exists to allocate a message.