This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.

SETIOV()

Fill in the fields of an iov_t structure

Synopsis:

#include <sys/types.h>
#include <unistd.h>

void SETIOV( iov_t *msg,
             void *addr,
             size_t len );

Arguments:

msg: A pointer to the iov_t structure structure that you want to set.
addr: The value you want to use for the structure's iov_base member.
len: The value you want to use for the structure's iov_len member.

Description:

The SETIOV() macro fills in the fields of an iov_t message structure. The iov_t structure consists of two fields:

typedef struct iovec {
    void    *iov_base;
    size_t   iov_len;
} iov_t;

SETIOV() doesn't make a copy of the data that addr points to; it just copies the pointer.

Classification:

QNX Neutrino

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes

See also:

GETIOVBASE(), GETIOVLEN(), MsgKeyData(), MsgReadv(), MsgReceivev(), MsgReplyv(), MsgSendv(), MsgWritev()

Message Passing chapter of Getting Started with QNX Neutrino