X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmisc.cpp;h=d18f48d6e8a7c24a1c4eb7c679cb770e8af4717b;hp=07d58d637fb9fbc33b33509ed3212ca3b6246011;hb=99c9cae5865575c03a3eeea4ee6ea54ec8d59b18;hpb=ea7bebb604ef1fc8b1de45f38a604fad590b52f5 diff --git a/src/misc.cpp b/src/misc.cpp index 07d58d63..daafd3fb 100644 --- a/src/misc.cpp +++ b/src/misc.cpp @@ -1,13 +1,14 @@ /* - Glaurung, a UCI chess playing engine. - Copyright (C) 2004-2008 Tord Romstad + Stockfish, a UCI chess playing engine derived from Glaurung 2.1 + Copyright (C) 2004-2008 Tord Romstad (Glaurung author) + Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad - Glaurung is free software: you can redistribute it and/or modify + Stockfish 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 3 of the License, or (at your option) any later version. - Glaurung is distributed in the hope that it will be useful, + Stockfish 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. @@ -16,183 +17,182 @@ along with this program. If not, see . */ +#include +#include +#include +#include +#include -//// -//// Includes -//// +#include "misc.h" +#include "thread.h" -#if !defined(_MSC_VER) +using namespace std; +using namespace std::chrono; -# include -# include -# include +namespace { -#else +/// Version number. If Version is left empty, then compile date in the format +/// DD-MM-YY and show in engine_info. +const string Version = ""; -# include -# include -# include "dos.h" -int gettimeofday(struct timeval * tp, struct timezone * tzp); +/// Debug counters +int64_t hits[2], means[2]; -#endif +/// Our fancy logging facility. The trick here is to replace cin.rdbuf() and +/// cout.rdbuf() with two Tie objects that tie cin and cout to a file stream. We +/// can toggle the logging of std::cout and std:cin at runtime whilst preserving +/// usual i/o functionality, all without changing a single line of code! +/// Idea from http://groups.google.com/group/comp.lang.c++/msg/1d941c0f26ea0d81 -#include -#include -#include -#include +struct Tie: public streambuf { // MSVC requires splitted streambuf for cin and cout -#include "misc.h" + Tie(streambuf* b, ofstream* f) : buf(b), file(f) {} + int sync() { return file->rdbuf()->pubsync(), buf->pubsync(); } + int overflow(int c) { return log(buf->sputc((char)c), "<< "); } + int underflow() { return buf->sgetc(); } + int uflow() { return log(buf->sbumpc(), ">> "); } -//// -//// Variables -//// + streambuf* buf; + ofstream* file; -long dbg_cnt0 = 0; -long dbg_cnt1 = 0; + int log(int c, const char* prefix) { + static int last = '\n'; -//// -//// Functions -//// + if (last == '\n') + file->rdbuf()->sputn(prefix, 3); -void dbg_print_hit_rate() { + return last = file->rdbuf()->sputc((char)c); + } +}; - std::cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1 - << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) - << std::endl; -} +class Logger { -/// engine_name() returns the full name of the current Glaurung version. -/// This will be either "Glaurung YYMMDD" (where YYMMDD is the date when the -/// program was compiled) or "Glaurung ", depending on whether -/// the constant EngineVersion (defined in misc.h) is empty. + Logger() : in(cin.rdbuf(), &file), out(cout.rdbuf(), &file) {} + ~Logger() { start(false); } -const std::string engine_name() { + ofstream file; + Tie in, out; - if (EngineVersion.empty()) - { - std::string date(__DATE__); // From compiler, format is "Sep 21 2008" - std::string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"); +public: + static void start(bool b) { - size_t mon = 1 + months.find(date.substr(0, 3)) / 4; + static Logger l; - std::stringstream s; - std::string day = (date[4] == ' ' ? date.substr(5, 1) : date.substr(4, 2)); + if (b && !l.file.is_open()) + { + l.file.open("io_log.txt", ifstream::out | ifstream::app); + cin.rdbuf(&l.in); + cout.rdbuf(&l.out); + } + else if (!b && l.file.is_open()) + { + cout.rdbuf(l.out.buf); + cin.rdbuf(l.in.buf); + l.file.close(); + } + } +}; + +} // namespace + +/// engine_info() returns the full name of the current Stockfish version. This +/// will be either "Stockfish DD-MM-YY" (where DD-MM-YY is the date when +/// the program was compiled) or "Stockfish ", depending on whether +/// Version is empty. + +const string engine_info(bool to_uci) { + + const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"); + string month, day, year; + stringstream ss, date(__DATE__); // From compiler, format is "Sep 21 2008" - s << "Glaurung clone " << date.substr(date.length() - 2) << std::setfill('0') - << std::setw(2) << mon << std::setw(2) << day; + ss << "Stockfish " << Version << setfill('0'); - return s.str(); - } else - return "Glaurung clone " + EngineVersion; + if (Version.empty()) + { + date >> month >> day >> year; + ss << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2); + } + + ss << (Is64Bit ? " 64" : "") + << (HasPext ? " BMI2" : (HasPopCnt ? " POPCNT" : "")) + << (to_uci ? "\nid author ": " by ") + << "Tord Romstad, Marco Costalba and Joona Kiiski"; + + return ss.str(); } -/// get_system_time() returns the current system time, measured in -/// milliseconds. +/// Convert system time to milliseconds. That's all we need. -int get_system_time() { - struct timeval t; - gettimeofday(&t, NULL); - return t.tv_sec*1000 + t.tv_usec/1000; +Time::point Time::now() { + return duration_cast(steady_clock::now().time_since_epoch()).count(); } -/// cpu_count() tries to detect the number of CPU cores. +/// Debug functions used mainly to collect run-time statistics -#if !defined(_MSC_VER) +void dbg_hit_on(bool b) { ++hits[0]; if (b) ++hits[1]; } +void dbg_hit_on(bool c, bool b) { if (c) dbg_hit_on(b); } +void dbg_mean_of(int v) { ++means[0]; means[1] += v; } -# if defined(_SC_NPROCESSORS_ONLN) -int cpu_count() { - return Min(sysconf(_SC_NPROCESSORS_ONLN), 8); -} -# else -int cpu_count() { - return 1; -} -# endif +void dbg_print() { -#else + if (hits[0]) + cerr << "Total " << hits[0] << " Hits " << hits[1] + << " hit rate (%) " << 100 * hits[1] / hits[0] << endl; -int cpu_count() { - SYSTEM_INFO s; - GetSystemInfo(&s); - return Min(s.dwNumberOfProcessors, 8); + if (means[0]) + cerr << "Total " << means[0] << " Mean " + << (double)means[1] / means[0] << endl; } -#endif +/// Used to serialize access to std::cout to avoid multiple threads writing at +/// the same time. -/* - From Beowulf, from Olithink -*/ -#ifndef _WIN32 -/* Non-windows version */ -int Bioskey() -{ - fd_set readfds; - struct timeval timeout; - - FD_ZERO(&readfds); - FD_SET(fileno(stdin), &readfds); - /* Set to timeout immediately */ - timeout.tv_sec = 0; - timeout.tv_usec = 0; - select(16, &readfds, 0, 0, &timeout); - - return (FD_ISSET(fileno(stdin), &readfds)); +std::ostream& operator<<(std::ostream& os, SyncCout sc) { + + static std::mutex m; + + if (sc == IO_LOCK) + m.lock(); + + if (sc == IO_UNLOCK) + m.unlock(); + + return os; } + +/// Trampoline helper to avoid moving Logger to misc.h +void start_logger(bool b) { Logger::start(b); } + + +/// prefetch() preloads the given address in L1/L2 cache. This is a non-blocking +/// function that doesn't stall the CPU waiting for data to be loaded from memory, +/// which can be quite slow. +#ifdef NO_PREFETCH + +void prefetch(void*) {} + #else -/* Windows-version */ -#include -#include -int Bioskey() -{ - static int init = 0, - pipe; - static HANDLE inh; - DWORD dw; - /* If we're running under XBoard then we can't use _kbhit() as the input - * commands are sent to us directly over the internal pipe */ - -#if defined(FILE_CNT) - if (stdin->_cnt > 0) - return stdin->_cnt; -#endif - if (!init) { - init = 1; - inh = GetStdHandle(STD_INPUT_HANDLE); - pipe = !GetConsoleMode(inh, &dw); - if (!pipe) { - SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT)); - FlushConsoleInputBuffer(inh); - } - } - if (pipe) { - if (!PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL)) - return 1; - return dw; - } else { - // Count the number of unread input records, including keyboard, - // mouse, and window-resizing input records. - GetNumberOfConsoleInputEvents(inh, &dw); - if (dw <= 0) - return 0; - - // Read data from console without removing it from the buffer - INPUT_RECORD rec[256]; - DWORD recCnt; - if (!PeekConsoleInput(inh, rec, Min(dw, 256), &recCnt)) - return 0; - - // Search for at least one keyboard event - for (DWORD i = 0; i < recCnt; i++) - if (rec[i].EventType == KEY_EVENT) - return 1; - - return 0; - } + +void prefetch(void* addr) { + +# if defined(__INTEL_COMPILER) + // This hack prevents prefetches from being optimized away by + // Intel compiler. Both MSVC and gcc seem not be affected by this. + __asm__ (""); +# endif + +# if defined(__INTEL_COMPILER) || defined(_MSC_VER) + _mm_prefetch((char*)addr, _MM_HINT_T0); +# else + __builtin_prefetch(addr); +# endif } + #endif