InterlockedExchange function

Exchanges a value, atomically.

Syntax

void InterlockedExchange(
  in  UINT dest,
  in  UINT value,
  out UINT original_value
);

Parameters

dest [in]

Type: UINT

The destination address.

value [in]

Type: UINT

The input value.

original_value [out]

Type: UINT

The original value.

Return value

This function does not return a value.

Remarks

This operation can only be performed on scalar-typed resources and shared memory variables. There are three possible uses for this function. The first is when R is a shared memory variable type. In this case, the function performs the operation on the shared memory register referenced by dest. The second scenario is when R is a resource variable type. In this scenario, the function performs the operation on the resource location referenced by dest. Finally, the third scenario is when R is a local variable type. In this scenario, the function reduces to the operation performed using local operations. This operation is only available when R is readable and writable.

This function is supported in the following types of shaders:

See also

RWByteAddressBuffer

Shader Model 5