nng_iov - scatter/gather element

NAME  SYNOPSIS  DESCRIPTION  SEE ALSO 

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NAME

nng_iov − scatter/gather element

SYNOPSIS

#include <nng/nng.h>

typedef struct {
void * iov_buf;
size_t iov_len;
} nng_iov;

DESCRIPTION

An nng_iov structure represents a single element in a scatter/gather array. Some operations can use arrays of these to access different regions of memory in a single operation. For example, it may be useful to send a message with header data from one part of memory, and a user payload from another.

The operations that do this typically store an array of these in an nng_aio structure using the nng_aio_set_iov() function.

The following structure members are present:

iov_buf

This is a pointer to the first byte within the memory being referenced by this scatter/gather element.

iov_len

This is the size in bytes of this scatter/gather element.

SEE ALSO

nng_aio_set_iov(3), nng_aio(5), nng(7)

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