NAME

       atomic_xchg - atomic_xchg functions.

       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);

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(3clc), is enabled by
       cl_khr_int64_base_atomics(3clc).

SPECIFICATION

       OpenCL Specification[1]

SEE ALSO

       atomicFunctions(3clc), atom_xchg(3clc)

AUTHORS

       The Khronos Group

COPYRIGHT

       Copyright © 2007-2011 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.

NOTES

        1. OpenCL Specification
           page 279, section 6.12.11 - Atomic Functions for 32-bit integers