atomic_xchg

atomic_xchg functions.

`int atomic_xchg (`	volatile __global int `*p`,
	int `val)`

`uint atomic_xchg (`	volatile __global uint `*p`,
	uint `val)`

`float atomic_xchg (`	volatile __global float `*p`,
	float `val)`

`int atomic_xchg (`	volatile __local int `*p`,
	int `val)`

`uint atomic_xchg (`	volatile __local uint `*p`,
	uint `val)`

`float atomic_xchg (`	volatile __local float `*p`,
	float `val)`

Description

Swaps the old value stored at location p with new value given by val. Returns old value.

Specification

OpenCL Specification

Also see

Atomic Functions, cl_khr_int64_base_atomics

Copyright © 2007-2010 The Khronos Group Inc. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and/or associated documentation files (the "Materials"), to deal in the Materials without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to the condition that this copyright notice and permission notice shall be included in all copies or substantial portions of the Materials.