#include <nng/nng.h> typedef struct nng_msg nng_msg;
nng_msg represents a single message sent between Scalability Protocols
Messages internally have a body, containing the application supplied
payload, and a header, containing protocol specific routing and similar
|Using the message-oriented functions in the nng API is a good way to reduce the likelihood of data copies and improve application performance.|
In addition there are other functions used to access message contents, including adding data to either the beginning or end of the message, automatic data conversion, and removing data from the beginning or end. These functions are designed to try to avoid copying message contents by making use of scratch areas at the beginning and end of the message.
This function returns 0 on success, and non-zero otherwise.
Insufficient free memory exists to allocate a message.