NAME

store, subyte, suword — store data to user-space

SYNOPSIS

#include <sys/types.h>
#include <sys/time.h>
#include <sys/systm.h>

int
subyte(volatile void *base, int byte);

int
suword(volatile void *base, long word);

int
suword16(volatile void *base, int word);

int
suword32(volatile void *base, int32_t word);

int
suword64(volatile void *base, int64_t word);

DESCRIPTION

The store functions are designed to copy small amounts of data to user-space. If the user address is naturally aligned, then the operation will be performed atomically. Otherwise it may fail or be performed non-atomically, depending on the platform.

The store routines provide the following functionality:

subyte()

Stores a byte of data to the user-space address base.

suword()

Stores a word of data to the user-space address base.

suword16()

Stores 16 bits of data to the user-space address base.

suword32()

Stores 32 bits of data to the user-space address base.

suword64()

Stores 64 bits of data to the user-space address base.

RETURN VALUES

The store functions return 0 on success or -1 on failure.

SEE ALSO

copy(9), fetch(9)