RWByteAddressBuffer.InterlockedCompareExchange¶

Description¶

Perform a 32-bit integer atomic compare-and-exchange operation at the specified byte address within the RWByteAddressBuffer.

Signature¶

void RWByteAddressBuffer.InterlockedCompareExchange(
    uint dest,
    uint compare_value,
    uint value,
    out uint original_value);

Parameters¶

dest : uint¶

The address at which to perform the atomic compare-and-exchange operation.

compare_value : uint¶

The value to perform bitwise comparison to the value at byteAddress.

value : uint¶

The value to store at byteAddress if the comparison is successful.

original_value : uint¶

The original value at byteAddress before the compare-and-exchange operation.

Remarks¶

For SPIR-V, this function maps to OpAtomicCompareExchange. For HLSL, this function translates to InterlockedCompareExchange. For CUDA, this function maps to atomicCAS.

Availability and Requirements¶

Defined for the following targets:

hlsl¶

Available in all stages.

glsl¶

Available in all stages.

cuda¶

Available in all stages.

metal¶

Available in all stages.

spirv¶

Available in all stages.