InterlockedExchange function (HLSL reference)
Assigns value to dest and returns the original value.
Syntax
void InterlockedExchange(
in R dest,
in T value,
out T original_value
);
Parameters
-
dest [in]
-
Type: R
The destination address.
-
value [in]
-
Type: T
The input value.
-
original_value [out]
-
Type: T
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 two 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. This operation is only available when R is readable and writable.
Interlocked operations do not imply any memory fence/barrier.
Minimum Shader Model
This function is supported in the following shader models.
| Shader Model | Supported |
|---|---|
| Shader Model 5 and higher shader models | yes |
This function is supported in the following types of shaders:
| Vertex | Hull | Domain | Geometry | Pixel | Compute |
|---|---|---|---|---|---|
| x | x | x | x | x | x |
See also