/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2012 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
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#if defined(_WIN32) || defined(_WIN64)
-
-#define NOMINMAX // disable macros min() and max()
-#include <windows.h>
-
-#else
-
-# include <unistd.h>
-# if defined(__hpux)
-# include <sys/pstat.h>
-# endif
-
-#endif
-
-#if !defined(NO_PREFETCH)
-# include <xmmintrin.h>
-#endif
-
-#include <algorithm>
+#include <fstream>
#include <iomanip>
#include <iostream>
#include <sstream>
-#include <streambuf>
#include "misc.h"
#include "thread.h"
using namespace std;
-/// Version number. If Version is left empty, then Tag plus current
-/// date (in the format YYMMDD) is used as a version number.
-
-static const string Version = "";
-static const string Tag = "";
-
-
-/// engine_info() 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 <version number>", 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"
+namespace {
- if (Version.empty())
- {
- date >> month >> day >> year;
+/// Version number. If Version is left empty, then compile date in the format
+/// DD-MM-YY and show in engine_info.
+const string Version = "";
- s << "Stockfish " << Tag
- << setfill('0') << " " << year.substr(2)
- << setw(2) << (1 + months.find(month) / 4)
- << setw(2) << day;
- }
- else
- s << "Stockfish " << 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 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
- s << cpu64 << popcnt << (to_uci ? "\nid author ": " by ")
- << "Tord Romstad, Marco Costalba and Joona Kiiski";
+struct Tie: public streambuf { // MSVC requires split streambuf for cin and cout
- return s.str();
-}
+ Tie(streambuf* b, streambuf* l) : buf(b), logBuf(l) {}
+ 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(), ">> "); }
-/// Debug functions used mainly to collect run-time statistics
+ streambuf *buf, *logBuf;
-static uint64_t hits[2], means[2];
+ int log(int c, const char* prefix) {
-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; }
+ static int last = '\n'; // Single log file
-void dbg_print() {
+ if (last == '\n')
+ logBuf->sputn(prefix, 3);
- if (hits[0])
- cerr << "Total " << hits[0] << " Hits " << hits[1]
- << " hit rate (%) " << 100 * hits[1] / hits[0] << endl;
+ return last = logBuf->sputc((char)c);
+ }
+};
- if (means[0])
- cerr << "Total " << means[0] << " Mean "
- << (float)means[1] / means[0] << endl;
-}
+class Logger {
+ Logger() : in(cin.rdbuf(), file.rdbuf()), out(cout.rdbuf(), file.rdbuf()) {}
+ ~Logger() { start(false); }
-/// Our fancy logging facility. The trick here is to replace cout.rdbuf() with
-/// this one that sends the output both to console and to a file, this allow us
-/// to toggle the logging of std::cout to a file while preserving output to
-/// stdout and without changing a single line of code! Idea and code from:
-/// http://groups.google.com/group/comp.lang.c++/msg/1d941c0f26ea0d81
+ ofstream file;
+ Tie in, out;
-class Logger: public streambuf {
public:
- typedef char_traits<char> traits_type;
- typedef traits_type::int_type int_type;
-
- Logger() : cout_buf(cout.rdbuf()) {}
- ~Logger() { set(false); }
+ static void start(bool b) {
- void set(bool b) {
+ static Logger l;
- if (b && !file.is_open())
+ if (b && !l.file.is_open())
{
- file.open("out.txt", ifstream::out | ifstream::app);
- cout.rdbuf(this);
+ l.file.open("io_log.txt", ifstream::out);
+ cin.rdbuf(&l.in);
+ cout.rdbuf(&l.out);
}
- else if (!b && file.is_open())
+ else if (!b && l.file.is_open())
{
- cout.rdbuf(cout_buf);
- file.close();
+ cout.rdbuf(l.out.buf);
+ cin.rdbuf(l.in.buf);
+ l.file.close();
}
}
+};
-private:
- int_type overflow(int_type c) {
-
- if (traits_type::eq_int_type(c, traits_type::eof()))
- return traits_type::not_eof(c);
-
- c = cout_buf->sputc(traits_type::to_char_type(c));
-
- if (!traits_type::eq_int_type(c, traits_type::eof()))
- c = file.rdbuf()->sputc(traits_type::to_char_type(c));
+} // namespace
- return c;
- }
+/// engine_info() returns the full name of the current Stockfish version. This
+/// will be either "Stockfish <Tag> DD-MM-YY" (where DD-MM-YY is the date when
+/// the program was compiled) or "Stockfish <Version>", depending on whether
+/// Version is empty.
- int sync() {
+const string engine_info(bool to_uci) {
- int c = cout_buf->pubsync();
+ 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 (c != -1)
- c = file.rdbuf()->pubsync();
+ ss << "Stockfish " << Version << setfill('0');
- return c;
+ if (Version.empty())
+ {
+ date >> month >> day >> year;
+ ss << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2);
}
- ofstream file;
- streambuf* cout_buf;
-};
+ ss << (Is64Bit ? " 64" : "")
+ << (HasPext ? " BMI2" : (HasPopCnt ? " POPCNT" : ""))
+ << (to_uci ? "\nid author ": " by ")
+ << "T. Romstad, M. Costalba, J. Kiiski, G. Linscott";
-void logger_set(bool b) {
-
- static Logger l;
- l.set(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 std::min(int(s.dwNumberOfProcessors), MAX_THREADS);
-#else
+void dbg_print() {
-# if defined(_SC_NPROCESSORS_ONLN)
- return std::min((int)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 std::min((int)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;
}
-/// 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.
-void timed_wait(WaitCondition& sleepCond, Lock& sleepLock, int msec) {
+std::ostream& operator<<(std::ostream& os, SyncCout sc) {
-#if defined(_WIN32) || defined(_WIN64)
- int tm = msec;
-#else
- timespec ts, *tm = &ts;
- uint64_t ms = Time::current_time().msec() + msec;
+ static Mutex m;
- ts.tv_sec = ms / 1000;
- ts.tv_nsec = (ms % 1000) * 1000000LL;
-#endif
+ if (sc == IO_LOCK)
+ m.lock();
+
+ 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); }
-void prefetch(char*) {}
+
+/// 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
-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
- _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
projects / stockfish / blobdiff