Man page - qb_atomic_int_compare_and_exchange(3)
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Package: libqb-dev
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Manual
QB_ATOMIC_INT_COMPARE_AND_EXCHANGE
NAMESYNOPSIS
PARAMS
DESCRIPTION
RETURN VALUE
SEE ALSO
COPYRIGHT
NAME
qb_atomic_int_compare_and_exchange - Compares oldval with the integer pointed to by atomic and if they are equal, atomically exchanges *atomic with newval.
SYNOPSIS
#include <qb/qbatomic.h>
int32_t
qb_atomic_int_compare_and_exchange
(
volatile int32_t QB_GNUC_MAY_ALIAS *
atomic
, /* a
pointer to an integer */
int32_t
oldval
, /* the assumed old value of
*atomic */
int32_t
newval
/* the new value of *atomic*/
);
PARAMS
atomic a pointer to an integer
oldval the assumed old value of *atomic
newval the new value of *atomic
DESCRIPTION
Also acts as a memory barrier.
RETURN VALUE
QB_TRUE, if *atomic was equal oldval. QB_FALSE otherwise.
SEE ALSO
qb_atomic_int_set (3), qb_atomic_int_get (3), qb_atomic_int_add (3), qb_atomic_init (3), qb_atomic_pointer_get (3), qb_atomic_int_exchange_and_add (3), qb_atomic_pointer_compare_and_exchange (3), qb_atomic_pointer_set (3)
COPYRIGHT
Copyright (C) 2003 Sebastian Wilhelmi