qb_atomic_int_exchange_and_add - Man Page

Atomically adds val to the integer pointed to by atomic.


#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 */


atomic a pointer to an integer

val    the value to add to *atomic


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)

Referenced By

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

2022-03-23 libqb Programmer's Manual