1 2 /* 3 * mt19937.h 4 * 5 * Mersenne Twister. 6 * 7 A C-program for MT19937, with initialization improved 2002/1/26. 8 Coded by Takuji Nishimura and Makoto Matsumoto. 9 10 Before using, initialize the state by using init_genrand(seed) 11 or init_by_array(init_key, key_length). 12 13 Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura, 14 All rights reserved. 15 16 Redistribution and use in source and binary forms, with or without 17 modification, are permitted provided that the following conditions 18 are met: 19 20 1. Redistributions of source code must retain the above copyright 21 notice, this list of conditions and the following disclaimer. 22 23 2. Redistributions in binary form must reproduce the above copyright 24 notice, this list of conditions and the following disclaimer in the 25 documentation and/or other materials provided with the distribution. 26 27 3. The names of its contributors may not be used to endorse or promote 28 products derived from this software without specific prior written 29 permission. 30 31 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 34 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 35 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 36 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 37 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 38 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 39 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 40 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 41 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 43 44 Any feedback is very welcome. 45 http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html 46 email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space) 47 */ 48 49 #ifndef MT19937_H 50 #define MT19937_H 1 51 52 #if defined(__APPLE__) 53 #include <OpenCL/cl_platform.h> 54 #else 55 #include <CL/cl_platform.h> 56 #endif 57 58 /* 59 * Interfaces here have been modified from original sources so that they 60 * are safe to call reentrantly, so long as a different MTdata is used 61 * on each thread. 62 */ 63 64 typedef struct _MTdata *MTdata; 65 66 /* Create the random number generator with seed */ 67 MTdata init_genrand(cl_uint /*seed*/); 68 69 /* release memory used by a MTdata private data */ 70 void free_mtdata(MTdata /*data*/); 71 72 /* generates a random number on [0,0xffffffff]-interval */ 73 cl_uint genrand_int32(MTdata /*data*/); 74 75 /* generates a random number on [0,0xffffffffffffffffULL]-interval */ 76 cl_ulong genrand_int64(MTdata /*data*/); 77 78 /* generates a random number on [0,1]-real-interval */ 79 double genrand_real1(MTdata /*data*/); 80 81 /* generates a random number on [0,1)-real-interval */ 82 double genrand_real2(MTdata /*data*/); 83 84 /* generates a random number on (0,1)-real-interval */ 85 double genrand_real3(MTdata /*data*/); 86 87 /* generates a random number on [0,1) with 53-bit resolution*/ 88 double genrand_res53(MTdata /*data*/); 89 90 91 #ifdef __cplusplus 92 93 /* generates a random boolean */ 94 bool genrand_bool(MTdata /*data*/); 95 96 #include <cassert> 97 #include <utility> 98 99 class MTdataHolder { 100 public: 101 MTdataHolder() = default; MTdataHolder(cl_uint seed)102 explicit MTdataHolder(cl_uint seed) 103 { 104 m_mtdata = init_genrand(seed); 105 assert(m_mtdata != nullptr); 106 } 107 108 // Forbid copy. 109 MTdataHolder(const MTdataHolder&) = delete; 110 MTdataHolder& operator=(const MTdataHolder&) = delete; 111 112 // Support move semantics. MTdataHolder(MTdataHolder && h)113 MTdataHolder(MTdataHolder&& h) { std::swap(m_mtdata, h.m_mtdata); } 114 MTdataHolder& operator=(MTdataHolder&& h) 115 { 116 std::swap(m_mtdata, h.m_mtdata); 117 return *this; 118 } 119 ~MTdataHolder()120 ~MTdataHolder() 121 { 122 if (m_mtdata) free_mtdata(m_mtdata); 123 } 124 MTdata()125 operator MTdata() const 126 { 127 assert(m_mtdata && "Object wasn't initialised"); 128 return m_mtdata; 129 } 130 131 private: 132 MTdata m_mtdata = nullptr; 133 }; 134 135 #endif // #ifdef __cplusplus 136 137 #endif /* MT19937_H */ 138