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Changed not to use std::random_device(). Because it always returns the same integers on MingW. #68

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nodchip
2020-08-10 10:45:03 +09:00
parent 31d4f46f5e
commit 643be3c6f9
1 changed files with 11 additions and 6 deletions
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17
src/learn/learner.cpp
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@@ -15,6 +15,7 @@
#if defined(EVAL_LEARN)
#include <chrono>
#include <filesystem>
#include <random>
#include <regex>
@@ -959,8 +960,8 @@ void gen_sfen(Position&, istringstream& is)
if (random_file_name)
{
// Give a random number to output_file_name at this point.
std::random_device seed_gen;
PRNG r(seed_gen());
// Do not use std::random_device(). Because it always the same integers on MinGW.
PRNG r(std::chrono::system_clock::now().time_since_epoch().count());
// Just in case, reassign the random numbers.
for(int i=0;i<10;++i)
r.rand(1);
@@ -1205,7 +1206,8 @@ double calc_grad(Value shallow, const PackedSfenValue& psv) {
// Sfen reader
struct SfenReader
{
SfenReader(int thread_num) : prng((std::random_device())())
// Do not use std::random_device(). Because it always the same integers on MinGW.
SfenReader(int thread_num) : prng(std::chrono::system_clock::now().time_since_epoch().count())
{
packed_sfens.resize(thread_num);
total_read = 0;
@@ -2283,7 +2285,8 @@ void shuffle_files(const vector<string>& filenames , const string& output_file_n
uint64_t write_file_count = 0;
// random number to shuffle
PRNG prng((std::random_device())());
// Do not use std::random_device(). Because it always the same integers on MinGW.
PRNG prng(std::chrono::system_clock::now().time_since_epoch().count());
// generate the name of the temporary file
auto make_filename = [](uint64_t i)
@@ -2361,7 +2364,8 @@ void shuffle_files_quick(const vector<string>& filenames, const string& output_f
uint64_t read_sfen_count = 0;
// random number to shuffle
PRNG prng((std::random_device())());
// Do not use std::random_device(). Because it always the same integers on MinGW.
PRNG prng(std::chrono::system_clock::now().time_since_epoch().count());
// number of files
size_t file_count = filenames.size();
@@ -2419,7 +2423,8 @@ void shuffle_files_on_memory(const vector<string>& filenames,const string output
}
// shuffle from buf[0] to buf[size-1]
PRNG prng((std::random_device())());
// Do not use std::random_device(). Because it always the same integers on MinGW.
PRNG prng(std::chrono::system_clock::now().time_since_epoch().count());
uint64_t size = (uint64_t)buf.size();
std::cout << "shuffle buf.size() = " << size << std::endl;
for (uint64_t i = 0; i < size; ++i)