X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmisc.cpp;h=04c3c939f76d98229db4c570e089f92375657d31;hp=4ff1c0cfdf5e5cb44a17c978584bd81861555925;hb=5066e17eba4b9d4217a8d173de56e40e0e05fc6d;hpb=aa2368a6878a867fe63247ee2adf2fde3dfe22be diff --git a/src/misc.cpp b/src/misc.cpp index 4ff1c0cf..04c3c939 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) 2008-2013 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 @@ -17,6 +17,7 @@ along with this program. If not, see . */ +#include #include #include #include @@ -24,109 +25,45 @@ #include "misc.h" #include "thread.h" -#if defined(__hpux) -# include -#endif - using namespace std; -/// Version number. If Version is left empty, then Tag plus current -/// date, in the format DD-MM-YY, are used as a version number. - -static const string Version = "3"; -static const string Tag = ""; - - -/// 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"); - const string cpu64(Is64Bit ? " 64bit" : ""); - const string popcnt(HasPopCnt ? " SSE4.2" : ""); - - string month, day, year; - stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008" - - s << "Stockfish " << Version; - - if (Version.empty()) - { - date >> month >> day >> year; - - s << Tag << string(Tag.empty() ? "" : " ") << setfill('0') << setw(2) << day - << "-" << setw(2) << (1 + months.find(month) / 4) << "-" << year.substr(2); - } - - s << cpu64 << popcnt << (to_uci ? "\nid author ": " by ") - << "Tord Romstad, Marco Costalba and Joona Kiiski"; - - return s.str(); -} - - -/// Convert system time to milliseconds. That's all we need. - -Time::point Time::now() { - sys_time_t t; system_time(&t); return time_to_msec(t); -} - - -/// 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 " - << (float)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 - 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() : in(cin.rdbuf(), file.rdbuf()), out(cout.rdbuf(), file.rdbuf()) {} ~Logger() { start(false); } ofstream file; @@ -139,7 +76,7 @@ public: if (b && !l.file.is_open()) { - l.file.open("io_log.txt", ifstream::out | ifstream::app); + l.file.open("io_log.txt", ifstream::out); cin.rdbuf(&l.in); cout.rdbuf(&l.out); } @@ -152,95 +89,97 @@ public: } }; +} // namespace -/// Used to serialize access to std::cout to avoid multiple threads to write at -/// the same time. - -std::ostream& operator<<(std::ostream& os, SyncCout sc) { +/// 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. - static Mutex m; +const string engine_info(bool to_uci) { - if (sc == io_lock) - m.lock(); + 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_unlock) - m.unlock(); + ss << "Stockfish " << Version << setfill('0'); - return os; -} + 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 ") + << "T. Romstad, M. Costalba, J. Kiiski, G. Linscott"; -/// Trampoline helper to avoid moving Logger to misc.h -void start_logger(bool b) { Logger::start(b); } + return ss.str(); +} -/// cpu_count() tries to detect the number of CPU cores +/// Debug functions used mainly to collect run-time statistics +static int64_t hits[2], means[2]; -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(_WIN32) || defined(_WIN64) - SYSTEM_INFO s; - GetSystemInfo(&s); - return s.dwNumberOfProcessors; -#else +void dbg_print() { -# if defined(_SC_NPROCESSORS_ONLN) - return sysconf(_SC_NPROCESSORS_ONLN); -# elif defined(__hpux) - struct pst_dynamic psd; - if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1) - return 1; - return psd.psd_proc_cnt; -# 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; } -/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap -/// conversion from milliseconds to struct timespec, as used by pthreads. +/// Used to serialize access to std::cout to avoid multiple threads writing at +/// the same time. + +std::ostream& operator<<(std::ostream& os, SyncCout sc) { -void timed_wait(WaitCondition& sleepCond, Lock& sleepLock, int msec) { + static Mutex m; -#if defined(_WIN32) || defined(_WIN64) - int tm = msec; -#else - timespec ts, *tm = &ts; - uint64_t ms = Time::now() + msec; + if (sc == IO_LOCK) + m.lock(); - ts.tv_sec = ms / 1000; - ts.tv_nsec = (ms % 1000) * 1000000LL; -#endif + if (sc == IO_UNLOCK) + m.unlock(); - cond_timedwait(sleepCond, sleepLock, tm); + 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. -#if defined(NO_PREFETCH) +/// 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(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(addr+64, _MM_HINT_T0); // 64 bytes ahead + _mm_prefetch((char*)addr, _MM_HINT_T0); # else __builtin_prefetch(addr); - __builtin_prefetch(addr+64); # endif }