ATOMIC(9) OpenBSD Kernel Manual ATOMIC(9)NAME
atomic, atomic_setbits_int, atomic_clearbits_int - interface to perform
atomic operations on data
SYNOPSIS
#include <machine/atomic.h>
void
atomic_setbits_int(unsigned int *p, unsigned int b);
void
atomic_clearbits_int(unsigned int *p, unsigned int b);
DESCRIPTION
The atomic set of functions provide an interface for changing data
atomically with respect to interrupts and multiple processors in the
system.
The atomic_setbits_int() function sets the bits in b in the integer
pointed to by p. It is equivalent to
*p |= b;
The atomic_clearbits_int() function clears the bits in b in the integer
pointed to by p. It is equivalent to
*p &= ~b;
HISTORY
The atomic functions first appeared in OpenBSD 4.1.
OpenBSD 4.9 May 31, 2007 OpenBSD 4.9
