atomic_xchg3clc

int atomic_xchg(volatile global(3clc) int *p, int val);

unsigned int atomic_xchg(volatile global(3clc) unsigned int *p, unsigned int val);

float atomic_xchg(volatile global(3clc) float *p, float val);

int atomic_xchg(volatile local(3clc) int *p, int val);

unsigned int atomic_xchg(volatile local(3clc) unsigned int *p, unsigned int val);

float atomic_xchg(volatile global(3clc) float *p, float val);

Overview

Swaps the old value stored at location p with new value given by val. The function returns old.

A 64-bit version of this function, atom_xchg(3clc), is enabled by cl_khr_int64_base_atomics(3clc).

Specification

OpenCL Specification[1]

Notes

1.

OpenCL Specification

page 279, section 6.12.11 - Atomic Functions for 32-bit integers