2012 Khronos Group
atomicOr 3G
atomicOr perform an atomic logical OR operation to a variable

## Declaration

int `atomicOr` inout int mem int data uint `atomicOr` inout uint mem uint data

## Parameters

mem

  The variable to use as the target of the operation.

data

  The data to be logically ORed with to mem.

## Description

`atomicOr` performs an atomic logical OR with data to the contents of mem and returns the original contents of mem from before the logical operation occured. The contents of the memory being updated by the atomic operation are guaranteed not to be modified by any other assignment or atomic memory function in any shader invocation between the time the original value is read and the time the new value is written.

Atomic memory functions are supported only for a limited set of variables. A shader will fail to compile if the value passed to the mem argument of an atomic memory function does not correspond to a buffer or shared variable. It is acceptable to pass an element of an array or a single component of a vector to the mem argument of an atomic memory function, as long as the underlying array or vector is a buffer or shared variable.

## Version Support

#VARTABLECOLS#
#FUNCTABLEHEADER#
atomicOr#newin43#

## See Also

atomicAdd, atomicAnd, atomicXor, atomicMin, atomicMax, atomicExchange, atomicCompSwap

## Copyright

Copyright 2011-2012 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.