X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmisc.cpp;h=08df524bf26beb5bed4453910cc161b1ed8364a3;hp=b9a802ad3c3bdb4ccb2afe2abf06f2841f41fd8c;hb=ace8e951d70c2986a0af83effcc0d2b2312d29e3;hpb=8f5deaea61e8aa754b324b809cc8f7f394dc7e0f diff --git a/src/misc.cpp b/src/misc.cpp index b9a802ad..08df524b 100644 --- a/src/misc.cpp +++ b/src/misc.cpp @@ -1,7 +1,8 @@ /* Stockfish, a UCI chess playing engine derived from Glaurung 2.1 Copyright (C) 2004-2008 Tord Romstad (Glaurung author) - Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad + Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad + Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, 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 @@ -17,6 +18,7 @@ along with this program. If not, see . */ +#include #include #include #include @@ -26,108 +28,60 @@ using namespace std; -/// Version number. If Version is left empty, then compile date, in the -/// format DD-MM-YY, is shown in engine_info. -static const string Version = ""; - - -/// 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 s, date(__DATE__); // From compiler, format is "Sep 21 2008" - - s << "Stockfish " << Version << setfill('0'); - - if (Version.empty()) - { - date >> month >> day >> year; - s << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2); - } - - s << (Is64Bit ? " 64" : "") - << (HasPopCnt ? " SSE4.2" : "") - << (to_uci ? "\nid author ": " by ") - << "Tord Romstad, Marco Costalba and Joona Kiiski"; - - return s.str(); -} - - -/// Debug functions used mainly to collect run-time statistics - -static uint64_t hits[2], means[2]; - -void dbg_hit_on(bool b) { ++hits[0]; if (b) ++hits[1]; } -void dbg_hit_on_c(bool c, bool b) { if (c) dbg_hit_on(b); } -void dbg_mean_of(int v) { ++means[0]; means[1] += v; } - -void dbg_print() { - - if (hits[0]) - cerr << "Total " << hits[0] << " Hits " << hits[1] - << " hit rate (%) " << 100 * hits[1] / hits[0] << endl; - - if (means[0]) - cerr << "Total " << means[0] << " Mean " - << (double)means[1] / means[0] << endl; -} +namespace { +/// Version number. If Version is left empty, then compile date in the format +/// DD-MM-YY and show in engine_info. +const string Version = ""; /// 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 while preserving -/// usual i/o functionality and without changing a single line of code! +/// 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 -struct Tie: public streambuf { // MSVC requires splitted streambuf for cin and cout +struct Tie: public streambuf { // MSVC requires split streambuf for cin and cout - Tie(streambuf* b, ofstream* f) : buf(b), file(f) {} + Tie(streambuf* b, streambuf* l) : buf(b), logBuf(l) {} - int sync() { return file->rdbuf()->pubsync(), buf->pubsync(); } + int sync() { return logBuf->pubsync(), buf->pubsync(); } int overflow(int c) { return log(buf->sputc((char)c), "<< "); } int underflow() { return buf->sgetc(); } int uflow() { return log(buf->sbumpc(), ">> "); } - streambuf* buf; - ofstream* file; + streambuf *buf, *logBuf; int log(int c, const char* prefix) { - static int last = '\n'; + static int last = '\n'; // Single log file if (last == '\n') - file->rdbuf()->sputn(prefix, 3); + logBuf->sputn(prefix, 3); - return last = file->rdbuf()->sputc((char)c); + return last = logBuf->sputc((char)c); } }; class Logger { - Logger() : in(cin.rdbuf(), &file), out(cout.rdbuf(), &file) {} - ~Logger() { start(false); } + Logger() : in(cin.rdbuf(), file.rdbuf()), out(cout.rdbuf(), file.rdbuf()) {} + ~Logger() { start(""); } ofstream file; Tie in, out; public: - static void start(bool b) { + static void start(const std::string& fname) { static Logger l; - if (b && !l.file.is_open()) + if (!fname.empty() && !l.file.is_open()) { - l.file.open("io_log.txt", ifstream::out | ifstream::app); + l.file.open(fname, ifstream::out); cin.rdbuf(&l.in); cout.rdbuf(&l.out); } - else if (!b && l.file.is_open()) + else if (fname.empty() && l.file.is_open()) { cout.rdbuf(l.out.buf); cin.rdbuf(l.in.buf); @@ -136,66 +90,95 @@ public: } }; +} // namespace -/// Used to serialize access to std::cout to avoid multiple threads to write at -/// the same time. +/// 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. -std::ostream& operator<<(std::ostream& os, SyncCout sc) { +const string engine_info(bool to_uci) { - static Mutex m; + 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" - if (sc == io_lock) - m.lock(); + ss << "Stockfish " << Version << setfill('0'); - if (sc == io_unlock) - m.unlock(); + if (Version.empty()) + { + date >> month >> day >> year; + ss << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2); + } - return os; + ss << (Is64Bit ? " 64" : "") + << (HasPext ? " BMI2" : (HasPopCnt ? " POPCNT" : "")) + << (to_uci ? "\nid author ": " by ") + << "T. Romstad, M. Costalba, J. Kiiski, G. Linscott"; + + return ss.str(); } -/// Trampoline helper to avoid moving Logger to misc.h -void start_logger(bool b) { Logger::start(b); } +/// Debug functions used mainly to collect run-time statistics +static int64_t hits[2], means[2]; + +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; } + +void dbg_print() { + if (hits[0]) + cerr << "Total " << hits[0] << " Hits " << hits[1] + << " hit rate (%) " << 100 * hits[1] / hits[0] << endl; -/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap -/// conversion from milliseconds to struct timespec, as used by pthreads. + if (means[0]) + cerr << "Total " << means[0] << " Mean " + << (double)means[1] / means[0] << endl; +} -void timed_wait(WaitCondition& sleepCond, Lock& sleepLock, int msec) { -#ifdef _WIN32 - int tm = msec; -#else - timespec ts, *tm = &ts; - uint64_t ms = Time::now() + msec; +/// Used to serialize access to std::cout to avoid multiple threads writing at +/// the same time. - ts.tv_sec = ms / 1000; - ts.tv_nsec = (ms % 1000) * 1000000LL; -#endif +std::ostream& operator<<(std::ostream& os, SyncCout sc) { - cond_timedwait(sleepCond, sleepLock, tm); + static Mutex m; + + if (sc == IO_LOCK) + m.lock(); + + if (sc == IO_UNLOCK) + m.unlock(); + + return os; } -/// 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. +/// Trampoline helper to avoid moving Logger to misc.h +void start_logger(const std::string& fname) { Logger::start(fname); } + + +/// 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(char*) {} +void prefetch(void*) {} #else -void prefetch(char* addr) { +void prefetch(void* addr) { # if defined(__INTEL_COMPILER) - // This hack prevents prefetches to be optimized away by - // Intel compiler. Both MSVC and gcc seems not affected. + // 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(addr, _MM_HINT_T0); + _mm_prefetch((char*)addr, _MM_HINT_T0); # else __builtin_prefetch(addr); # endif