X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmisc.cpp;h=daafd3fb650cbd009cee475402474f2786d43871;hp=cb2ea168256d4ee2eaa5d55ae5e607b1d41c2242;hb=99c9cae5865575c03a3eeea4ee6ea54ec8d59b18;hpb=f78488bbdb6aa047dc6149536a392f92e2c0e49d diff --git a/src/misc.cpp b/src/misc.cpp index cb2ea168..daafd3fb 100644 --- a/src/misc.cpp +++ b/src/misc.cpp @@ -1,7 +1,7 @@ /* Stockfish, a UCI chess playing engine derived from Glaurung 2.1 Copyright (C) 2004-2008 Tord Romstad (Glaurung author) - Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad + Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad Stockfish is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -17,254 +17,182 @@ along with this program. If not, see . */ -#if !defined(_MSC_VER) - -# include -# include -# include -# if defined(__hpux) -# include -# endif - -#else - -#define _CRT_SECURE_NO_DEPRECATE -#include -#include - -#endif - -#if !defined(NO_PREFETCH) -# include -#endif - -#include -#include +#include +#include #include #include #include -#include "bitcount.h" #include "misc.h" #include "thread.h" using namespace std; +using namespace std::chrono; -/// Version number. If EngineVersion is left empty, then AppTag plus -/// current date (in the format YYMMDD) is used as a version number. +namespace { -static const string AppName = "Stockfish"; -static const string EngineVersion = ""; -static const string AppTag = ""; +/// Version number. If Version is left empty, then compile date in the format +/// DD-MM-YY and show in engine_info. +const string Version = ""; +/// Debug counters +int64_t hits[2], means[2]; -/// engine_name() returns the full name of the current Stockfish version. -/// This will be either "Stockfish YYMMDD" (where YYMMDD is the date when -/// the program was compiled) or "Stockfish ", depending -/// on whether the constant EngineVersion is empty. +/// 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 -const string engine_name() { +struct Tie: public streambuf { // MSVC requires splitted streambuf for cin and cout - const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"); - const string cpu64(CpuIs64Bit ? " 64bit" : ""); + Tie(streambuf* b, ofstream* f) : buf(b), file(f) {} - if (!EngineVersion.empty()) - return AppName + " " + EngineVersion + cpu64; + 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(), ">> "); } - stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008" - string month, day, year; + streambuf* buf; + ofstream* file; - date >> month >> day >> year; + int log(int c, const char* prefix) { - s << setfill('0') << AppName + " " + AppTag + " " - << year.substr(2, 2) << setw(2) - << (1 + months.find(month) / 4) << setw(2) - << day << cpu64; + static int last = '\n'; - return s.str(); -} + if (last == '\n') + file->rdbuf()->sputn(prefix, 3); + return last = file->rdbuf()->sputc((char)c); + } +}; -/// Our brave developers! Required by UCI +class Logger { -const string engine_authors() { + Logger() : in(cin.rdbuf(), &file), out(cout.rdbuf(), &file) {} + ~Logger() { start(false); } - return "Tord Romstad, Marco Costalba and Joona Kiiski"; -} + ofstream file; + Tie in, out; +public: + static void start(bool b) { -/// Debug stuff. Helper functions used mainly for debugging purposes + static Logger l; -static uint64_t dbg_hit_cnt0; -static uint64_t dbg_hit_cnt1; -static uint64_t dbg_mean_cnt0; -static uint64_t dbg_mean_cnt1; + 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(); + } + } +}; -void dbg_print_hit_rate() { +} // namespace - if (dbg_hit_cnt0) - cout << "Total " << dbg_hit_cnt0 << " Hit " << dbg_hit_cnt1 - << " hit rate (%) " << 100 * dbg_hit_cnt1 / dbg_hit_cnt0 << endl; -} +/// 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. -void dbg_print_mean() { +const string engine_info(bool to_uci) { - if (dbg_mean_cnt0) - cout << "Total " << dbg_mean_cnt0 << " Mean " - << (float)dbg_mean_cnt1 / dbg_mean_cnt0 << endl; -} + 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" -void dbg_mean_of(int v) { + ss << "Stockfish " << Version << setfill('0'); - dbg_mean_cnt0++; - dbg_mean_cnt1 += v; -} + if (Version.empty()) + { + date >> month >> day >> year; + ss << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2); + } -void dbg_hit_on(bool b) { + ss << (Is64Bit ? " 64" : "") + << (HasPext ? " BMI2" : (HasPopCnt ? " POPCNT" : "")) + << (to_uci ? "\nid author ": " by ") + << "Tord Romstad, Marco Costalba and Joona Kiiski"; - dbg_hit_cnt0++; - if (b) - dbg_hit_cnt1++; + return ss.str(); } -void dbg_hit_on_c(bool c, bool b) { if (c) dbg_hit_on(b); } -void dbg_before() { dbg_hit_on(false); } -void dbg_after() { dbg_hit_on(true); dbg_hit_cnt0--; } - - -/// get_system_time() returns the current system time, measured in milliseconds -int get_system_time() { +/// Convert system time to milliseconds. That's all we need. -#if defined(_MSC_VER) - struct _timeb t; - _ftime(&t); - return int(t.time * 1000 + t.millitm); -#else - struct timeval t; - gettimeofday(&t, NULL); - return t.tv_sec * 1000 + t.tv_usec / 1000; -#endif +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 -int cpu_count() { +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(_MSC_VER) - SYSTEM_INFO s; - GetSystemInfo(&s); - return Min(s.dwNumberOfProcessors, MAX_THREADS); -#else +void dbg_print() { -# if defined(_SC_NPROCESSORS_ONLN) - return Min(sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS); -# elif defined(__hpux) - struct pst_dynamic psd; - if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1) - return 1; - return Min(psd.psd_proc_cnt, MAX_THREADS); -# else - return 1; -# endif + if (hits[0]) + cerr << "Total " << hits[0] << " Hits " << hits[1] + << " hit rate (%) " << 100 * hits[1] / hits[0] << endl; -#endif + if (means[0]) + cerr << "Total " << means[0] << " Mean " + << (double)means[1] / means[0] << endl; } -/// Check for console input. Original code from Beowulf, Olithink and Greko +/// Used to serialize access to std::cout to avoid multiple threads writing at +/// the same time. -#ifndef _WIN32 +std::ostream& operator<<(std::ostream& os, SyncCout sc) { -int input_available() { + static std::mutex m; - fd_set readfds; - struct timeval timeout; + if (sc == IO_LOCK) + m.lock(); - FD_ZERO(&readfds); - FD_SET(fileno(stdin), &readfds); - timeout.tv_sec = 0; // Set to timeout immediately - timeout.tv_usec = 0; - select(16, &readfds, 0, 0, &timeout); + if (sc == IO_UNLOCK) + m.unlock(); - return (FD_ISSET(fileno(stdin), &readfds)); + return os; } -#else - -int input_available() { - static HANDLE inh = NULL; - static bool usePipe = false; - INPUT_RECORD rec[256]; - DWORD nchars, recCnt; +/// Trampoline helper to avoid moving Logger to misc.h +void start_logger(bool b) { Logger::start(b); } - if (!inh) - { - inh = GetStdHandle(STD_INPUT_HANDLE); - if (GetConsoleMode(inh, &nchars)) - { - SetConsoleMode(inh, nchars & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT)); - FlushConsoleInputBuffer(inh); - } else - usePipe = true; - } - - // When using Standard C input functions, also check if there - // is anything in the buffer. After a call to such functions, - // the input waiting in the pipe will be copied to the buffer, - // and the call to PeekNamedPipe can indicate no input available. - // Setting stdin to unbuffered was not enough. [from Greko] - if (stdin->_cnt > 0) - return 1; - - // When running under a GUI the input commands are sent to us - // directly over the internal pipe. If PeekNamedPipe() returns 0 - // then something went wrong. Probably the parent program exited. - // Returning 1 will make the next call to the input function - // return EOF, where this should be catched then. - if (usePipe) - return PeekNamedPipe(inh, NULL, 0, NULL, &nchars, NULL) ? nchars : 1; - - // Count the number of unread input records, including keyboard, - // mouse, and window-resizing input records. - GetNumberOfConsoleInputEvents(inh, &nchars); - - // Read data from console without removing it from the buffer - if (nchars <= 0 || !PeekConsoleInput(inh, rec, Min(nchars, 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; -} - -#endif +/// 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 -/// prefetch() preloads the given address in L1/L2 cache. This is a non -/// blocking function and do not stalls the CPU waiting for data to be -/// loaded from memory, that can be quite slow. -#if defined(NO_PREFETCH) - -void prefetch(char*) {} +void prefetch(void*) {} #else -void prefetch(char* addr) { +void prefetch(void* addr) { -#if defined(__INTEL_COMPILER) || defined(__ICL) - // This hack prevents prefetches to be optimized away by - // Intel compiler. Both MSVC and gcc seems not affected. +# 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 +# endif - _mm_prefetch(addr, _MM_HINT_T2); - _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead +# if defined(__INTEL_COMPILER) || defined(_MSC_VER) + _mm_prefetch((char*)addr, _MM_HINT_T0); +# else + __builtin_prefetch(addr); +# endif } #endif