SFMTRand.cpp

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "SFMTRand.h"
#include <algorithm>
#include <array>
#include <functional>
#include <random>
#include <ctime>
 
#if __has_include(<mm_malloc.h>)
#include <mm_malloc.h>
#elif __has_include(<malloc.h>)
#include <malloc.h>
#else
static __inline__ void *__attribute__((__always_inline__, __nodebug__, __malloc__))
_mm_malloc(size_t __size, size_t __align)
{
 if (__align == 1)
 {
 return malloc(__size);
 }
 
 if (!(__align & (__align - 1)) && __align < sizeof(void *))
 __align = sizeof(void *);
 
 void *__mallocedMemory;
 
 if (posix_memalign(&__mallocedMemory, __align, __size))
 return NULL;
 
 return __mallocedMemory;
}
 
static __inline__ void __attribute__((__always_inline__, __nodebug__))
_mm_free(void *__p)
{
 free(__p);
}
#endif
 
SFMTRand::SFMTRand()
{
 std::random_device dev;
 if (dev.entropy() > 0)
 {
 std::array<uint32, SFMT_N32> seed;
 std::generate(seed.begin(), seed.end(), std::ref(dev));
 
 sfmt_init_by_array(&_state, seed.data(), seed.size());
 }
 else
 sfmt_init_gen_rand(&_state, uint32(time(nullptr)));
}
 
uint32 SFMTRand::RandomUInt32() // Output random bits
{
 return sfmt_genrand_uint32(&_state);
}
 
void* SFMTRand::operator new(size_t size, std::nothrow_t const&)
{
 return _mm_malloc(size, 16);
}
 
void SFMTRand::operator delete(void* ptr, std::nothrow_t const&)
{
 _mm_free(ptr);
}
 
void* SFMTRand::operator new(size_t size)
{
 return _mm_malloc(size, 16);
}
 
void SFMTRand::operator delete(void* ptr)
{
 _mm_free(ptr);
}
 
void* SFMTRand::operator new[](size_t size, std::nothrow_t const&)
{
 return _mm_malloc(size, 16);
}
 
void SFMTRand::operator delete[](void* ptr, std::nothrow_t const&)
{
 _mm_free(ptr);
}
 
void* SFMTRand::operator new[](size_t size)
{
 return _mm_malloc(size, 16);
}
 
void SFMTRand::operator delete[](void* ptr)
{
 _mm_free(ptr);
}