NN_FREEMSG

Section: nanomsg 1.1.5 (3)
Updated: 2021-01-26
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NAME

nn_freemsg - deallocate a message

SYNOPSIS

int nn_freemsg (void *msg);

DESCRIPTION

Deallocates a message allocated using nn_allocmsg(3) function or received via nn_recv(3) or nn_recvmsg(3) function. While nn_recv(3) and nn_recvmsg(3) allow to receive data into arbitrary buffers, using library-allocated buffers can be more efficient for large messages as it allows for using zero-copy techniques.

RETURN VALUE

If the function succeeds zero is returned. Otherwise, -1 is returned and errno is set to to one of the values defined below.

ERRORS

EFAULT

: The message pointer is invalid.

EXAMPLE

void *buf;
nn_recv (s, &buf, NN_MSG, 0);
nn_freemsg (buf);