DOKK / manpages / debian 11 / libqb-dev / qb_atomic_int_compare_and_exchange.3.en
QB_ATOMIC_INT_COMPARE_AND_EXCHANGE(3) libqb Programmer's Manual QB_ATOMIC_INT_COMPARE_AND_EXCHANGE(3)

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.

#include <qb/qbatomic.h>

int32_t qb_atomic_int_compare_and_exchange(

volatile int32_t QB_GNUC_MAY_ALIAS *atomic,
int32_t oldval,
int32_t newval );

atomic a pointer to an integer

oldval the assumed old value of *atomic

newval the new value of *atomic

Also acts as a memory barrier.

QB_TRUE, if *atomic was equal oldval. QB_FALSE otherwise.

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 (C) 2003 Sebastian Wilhelmi

2021-03-03 LIBQB