1 // The MIT License (MIT) 2 // 3 // Copyright (c) 2015 Sergey Makeev, Vadim Slyusarev 4 // 5 // Permission is hereby granted, free of charge, to any person obtaining a copy 6 // of this software and associated documentation files (the "Software"), to deal 7 // in the Software without restriction, including without limitation the rights 8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 // copies of the Software, and to permit persons to whom the Software is 10 // furnished to do so, subject to the following conditions: 11 // 12 // The above copyright notice and this permission notice shall be included in 13 // all copies or substantial portions of the Software. 14 // 15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 21 // THE SOFTWARE. 22 23 #pragma once 24 #include <MTTypes.h> 25 #include <MTPlatform.h> 26 27 28 namespace MT 29 { 30 template<class T> 31 T Min(T a, T b) 32 { 33 return a < b ? a : b; 34 } 35 36 template<class T> 37 T Max(T a, T b) 38 { 39 return a < b ? b : a; 40 } 41 42 template<class T> 43 T Clamp(T val, T min, T max) 44 { 45 return Min(max, Max(min, val)); 46 } 47 48 49 ////////////////////////////////////////////////////////////////////////// 50 class Timer 51 { 52 uint64 startMicroSeconds; 53 public: 54 Timer() : startMicroSeconds(MT::GetTimeMicroSeconds()) 55 { 56 } 57 58 uint32 GetPastMicroSeconds() const 59 { 60 return (uint32)(MT::GetTimeMicroSeconds() - startMicroSeconds); 61 } 62 63 uint32 GetPastMilliSeconds() const 64 { 65 return (uint32)((MT::GetTimeMicroSeconds() - startMicroSeconds) / 1000); 66 } 67 }; 68 69 70 71 //Compile time pow2 check 72 ////////////////////////////////////////////////////////////////////////// 73 template< size_t N, size_t C = 1 > 74 struct IsPow2Recurse 75 { 76 enum 77 { 78 result = IsPow2Recurse< N / 2, C * 2 >::result 79 }; 80 }; 81 82 template< size_t C > 83 struct IsPow2Recurse< 0, C > 84 { 85 enum 86 { 87 result = C 88 }; 89 }; 90 91 92 template< size_t N > 93 struct StaticIsPow2 94 { 95 enum 96 { 97 result = IsPow2Recurse< N - 1 >::result == N ? 1 : 0 98 }; 99 }; 100 101 102 103 } 104 105