Parent topic: S

SETIOV(), SETIOV_CONST()

Updated: April 19, 2023

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 );

void SETIOV_CONST( iov_t *msg,
             const void *addr,
             size_t len );

Arguments:

msg: A pointer to the iov_t structure that you want to set.
addr: The value you want to use for the structure's iov_base or iov_base_const 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 the following fields:

typedef struct iovec {
    union {
        void          *iov_base;
        const void    *iov_base_const;
    };
    _Sizet   iov_len;
} iov_t;

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

Classification:

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

Parent topic: S