atomic_cmpxchg - atomic_cmpxchg functions.

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       Read the 32-bit value (referred to as old) stored at location pointed by p. Compute (old == cmp) ?  val :
       old and store result at location pointed by p. The function returns old.

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

       atomic_cmpxchg - atomic_cmpxchg functions.

       intatomic_cmpxchg(volatileglobal(3clc) int *p,intcmp,intval);unsignedintatomic_cmpxchg(volatileglobal(3clc) unsigned int *p,unsignedintcmp,unsignedintval);intatomic_cmpxchg(volatilelocal(3clc) int *p,intcmp,intval);unsignedintatomic_cmpxchg(volatilelocal(3clc) unsigned int *p,unsignedintcmp,unsignedintval);

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

The Khronos Group                                  11/18/2024                               ATOMIC_CMPXCHG(3clc)

atomicFunctions(3clc), atom_cmpxchg(3clc)

OpenCLSpecification[1]