Diligent Engine API Reference: D:/GitHub/DiligentEngine/DiligentCore/Platforms/Win32/include/Win32PlatformMisc.h Source File

Diligent Engine API Reference

Win32PlatformMisc.h
1 /* Copyright 2015-2018 Egor Yusov
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
10 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
11 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
12 *
13 * In no event and under no legal theory, whether in tort (including negligence),
14 * contract, or otherwise, unless required by applicable law (such as deliberate
15 * and grossly negligent acts) or agreed to in writing, shall any Contributor be
16 * liable for any damages, including any direct, indirect, special, incidental,
17 * or consequential damages of any character arising as a result of this License or
18 * out of the use or inability to use the software (including but not limited to damages
19 * for loss of goodwill, work stoppage, computer failure or malfunction, or any and
20 * all other commercial damages or losses), even if such Contributor has been advised
21 * of the possibility of such damages.
22 */
23
24 #pragma once
25
26 #include "BasicPlatformMisc.h"
27 #include "DebugUtilities.h"
28
29 #include <intrin.h>
30
31 struct WindowsMisc : public BasicPlatformMisc
32 {
33 static Diligent::Uint32 GetMSB(Diligent::Uint32 Val)
34 {
35 if( Val == 0 )return 32;
36
37 unsigned long MSB = 32;
38 _BitScanReverse(&MSB, Val);
39 VERIFY_EXPR(MSB == BasicPlatformMisc::GetMSB(Val));
40
41 return MSB;
42 }
43
44 static Diligent::Uint32 GetLSB(Diligent::Uint32 Val)
45 {
46 if( Val == 0 )return 32;
47
48 unsigned long LSB = 32;
49 _BitScanForward(&LSB, Val);
50 VERIFY_EXPR(LSB == BasicPlatformMisc::GetLSB(Val));
51
52 return LSB;
53 }
54 };
Diligent::Uint32
uint32_t Uint32
32-bit unsigned integer
Definition: BasicTypes.h:39