atomic_xchg

atomic_xchg functions.

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

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

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

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

`unsigned int atomic_xchg (`	volatile __local unsigned int `*p` ,
	unsigned int `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. The function returns old.

A 64-bit version of this function, atom_xchg, is enabled by cl_khr_int64_base_atomics.

Specification

OpenCL Specification

Also see

Atomic Functions, atom_xchg

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