// Copyright Epic Games, Inc. All Rights Reserved.

/**
 * Raw buffer: Flat list of raw bytes, read/written in uints.
 * 
 * No multi-data support currently. Would need software-bindless, in order to keep each buffer pure rather than adding headers.
 */

// @todo_pcg: Support having a non-RW byte address buffer for input data.
RWByteAddressBuffer {DataInterfaceName}_Data;

// Number of bytes in buffer.
uint {DataInterfaceName}_SizeBytes;

// #################### META INFO ##########################

uint GetNumData_{DataInterfaceName}()
{
	// Multi-data not currently supported. Could be done with multiple buffers (each individual buffer should be a pure raw buffer).
	return 1u;
}

uint GetNumElements_{DataInterfaceName}(uint InDataIndex)
{
	// InDataIndex unused for now as multi-data not currently supported.
	return {DataInterfaceName}_SizeBytes >> 2;
}

// #################### ACCESSORS ##########################

uint Load_{DataInterfaceName}(uint InDataIndex, uint InElementIndex)
{
	return {DataInterfaceName}_Data.Load(InElementIndex << 2);
}

uint4 Load4_{DataInterfaceName}(uint InDataIndex, uint InFirstElementIndex)
{
	return {DataInterfaceName}_Data.Load4(InFirstElementIndex << 2);
}

void Store_{DataInterfaceName}(uint InDataIndex, uint InElementIndex, uint InValue)
{
	{DataInterfaceName}_Data.Store(InElementIndex << 2, InValue);
}

void Store4_{DataInterfaceName}(uint InDataIndex, uint InFirstElementIndex, uint4 InValue)
{
	{DataInterfaceName}_Data.Store4(InFirstElementIndex << 2, InValue);
}

// #################### ATOMICS ##########################

// Returns value of attribute before incrementing.
uint AtomicAdd_{DataInterfaceName}(uint InDataIndex, uint InElementIndex, uint InValueToAdd)
{
	uint OriginalValue;
	{DataInterfaceName}_Data.InterlockedAdd(InElementIndex << 2, (uint)InValueToAdd, OriginalValue);

	return OriginalValue;
}