NAME¶

qb_atomic_int_exchange_and_add - Atomically adds val to the integer pointed to by atomic.

SYNOPSIS¶

#include <qb/qbatomic.h>

int32_t qb_atomic_int_exchange_and_add(


    volatile int32_t QB_GNUC_MAY_ALIAS   *atomic,  /* a pointer to an integer */


    int32_t                               val      /* the value to add to *atomic */
);

PARAMS¶

atomic a pointer to an integer

val the value to add to *atomic

DESCRIPTION¶

It returns the value of *atomic just before the addition took place. Also acts as a memory barrier.

RETURN VALUE¶

the value of *atomic before the addition.

SEE ALSO¶

qb_atomic_int_set(3), qb_atomic_int_compare_and_exchange(3), qb_atomic_int_get(3), qb_atomic_int_add(3), qb_atomic_init(3), qb_atomic_pointer_get(3), qb_atomic_pointer_compare_and_exchange(3), qb_atomic_pointer_set(3)

COPYRIGHT¶

Copyright (C) 2003 Sebastian Wilhelmi