/*
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) 2008-2012 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(_MSC_VER)
-
-# include <sys/time.h>
-# include <sys/types.h>
-# include <unistd.h>
-# if defined(__hpux)
-# include <sys/pstat.h>
-# endif
-
-#else
-
-#define _CRT_SECURE_NO_DEPRECATE
-#define NOMINMAX // disable macros min() and max()
-#include <windows.h>
-#include <sys/timeb.h>
-
-#endif
-
-#if !defined(NO_PREFETCH)
-# include <xmmintrin.h>
-#endif
-
-#include <cassert>
-#include <cstdio>
#include <iomanip>
#include <iostream>
#include <sstream>
-#include <algorithm>
-#include "bitcount.h"
#include "misc.h"
#include "thread.h"
+#if defined(__hpux)
+# include <sys/pstat.h>
+#endif
+
using namespace std;
-/// Version number. If EngineVersion is left empty, then AppTag plus
-/// current date (in the format YYMMDD) is used as a version number.
+/// 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 AppName = "Stockfish";
-static const string EngineVersion = "";
-static const string AppTag = "";
+static const string Version = "";
+static const string Tag = "";
-/// engine_name() returns the full name of the current Stockfish version.
+/// 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 the constant EngineVersion is empty.
+/// on whether Version is empty.
-const string engine_name() {
+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(CpuIs64Bit ? " 64bit" : "");
-
- if (!EngineVersion.empty())
- return AppName + " " + EngineVersion + cpu64;
+ const string cpu64(Is64Bit ? " 64bit" : "");
+ const string popcnt(HasPopCnt ? " SSE4.2" : "");
- stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008"
string month, day, year;
+ stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008"
+
+ if (Version.empty())
+ {
+ date >> month >> day >> year;
- date >> month >> day >> year;
+ s << "Stockfish " << Tag
+ << setfill('0') << " " << year.substr(2)
+ << setw(2) << (1 + months.find(month) / 4)
+ << setw(2) << day;
+ }
+ else
+ s << "Stockfish " << Version;
- s << setfill('0') << AppName + " " + AppTag + " "
- << year.substr(2, 2) << setw(2)
- << (1 + months.find(month) / 4) << setw(2)
- << day << cpu64;
+ s << cpu64 << popcnt << (to_uci ? "\nid author ": " by ")
+ << "Tord Romstad, Marco Costalba and Joona Kiiski";
return s.str();
}
-/// Our brave developers! Required by UCI
+/// Debug functions used mainly to collect run-time statistics
-const string engine_authors() {
+static uint64_t hits[2], means[2];
- return "Tord Romstad, Marco Costalba and Joona Kiiski";
+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;
}
-/// Debug stuff. Helper functions used mainly for debugging purposes
+/// 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!
+/// Idea from http://groups.google.com/group/comp.lang.c++/msg/1d941c0f26ea0d81
-static uint64_t dbg_hit_cnt0;
-static uint64_t dbg_hit_cnt1;
-static uint64_t dbg_mean_cnt0;
-static uint64_t dbg_mean_cnt1;
+class Logger {
-void dbg_print_hit_rate() {
+ Logger() : in(cin.rdbuf(), file), out(cout.rdbuf(), file) {}
+ ~Logger() { start(false); }
- if (dbg_hit_cnt0)
- cerr << "Total " << dbg_hit_cnt0 << " Hit " << dbg_hit_cnt1
- << " hit rate (%) " << 100 * dbg_hit_cnt1 / dbg_hit_cnt0 << endl;
-}
+ struct Tie: public streambuf { // MSVC requires splitted streambuf for cin and cout
-void dbg_print_mean() {
+ Tie(streambuf* b, ofstream& f) : buf(b), file(f) {}
- if (dbg_mean_cnt0)
- cerr << "Total " << dbg_mean_cnt0 << " Mean "
- << (float)dbg_mean_cnt1 / dbg_mean_cnt0 << endl;
-}
+ 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(), ">> "); }
-void dbg_mean_of(int v) {
+ int log(int c, const char* prefix) {
- dbg_mean_cnt0++;
- dbg_mean_cnt1 += v;
-}
+ static int last = '\n';
-void dbg_hit_on(bool b) {
+ if (last == '\n')
+ file.rdbuf()->sputn(prefix, 3);
- dbg_hit_cnt0++;
- if (b)
- dbg_hit_cnt1++;
-}
+ return last = file.rdbuf()->sputc((char)c);
+ }
-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--; }
+ streambuf* buf;
+ ofstream& file;
+ };
+ ofstream file;
+ Tie in, out;
-/// get_system_time() returns the current system time, measured in milliseconds
+public:
+ static void start(bool b) {
-int get_system_time() {
+ static Logger l;
-#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
-}
+ 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();
+ }
+ }
+};
+
+
+/// Trampoline helper to avoid moving Logger to misc.h
+void start_logger(bool b) { Logger::start(b); }
/// cpu_count() tries to detect the number of CPU cores
int cpu_count() {
-#if defined(_MSC_VER)
+#if defined(_WIN32) || defined(_WIN64)
SYSTEM_INFO s;
GetSystemInfo(&s);
- return std::min(int(s.dwNumberOfProcessors), MAX_THREADS);
+ return s.dwNumberOfProcessors;
#else
# if defined(_SC_NPROCESSORS_ONLN)
- return std::min((int)sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS);
+ 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 std::min((int)psd.psd_proc_cnt, MAX_THREADS);
+ return psd.psd_proc_cnt;
# else
return 1;
# endif
}
+/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap
+/// conversion from milliseconds to struct timespec, as used by pthreads.
+
+void timed_wait(WaitCondition& sleepCond, Lock& sleepLock, int msec) {
+
+#if defined(_WIN32) || defined(_WIN64)
+ int tm = msec;
+#else
+ timespec ts, *tm = &ts;
+ uint64_t ms = Time::current_time().msec() + msec;
+
+ ts.tv_sec = ms / 1000;
+ ts.tv_nsec = (ms % 1000) * 1000000LL;
+#endif
+
+ cond_timedwait(sleepCond, sleepLock, tm);
+}
+
+
/// 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.
#else
+# include <xmmintrin.h>
+
void prefetch(char* addr) {
-#if defined(__INTEL_COMPILER) || defined(__ICL)
+# if defined(__INTEL_COMPILER) || defined(__ICL)
// This hack prevents prefetches to be optimized away by
// Intel compiler. Both MSVC and gcc seems not affected.
__asm__ ("");
-#endif
+# endif
_mm_prefetch(addr, _MM_HINT_T2);
_mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead
projects / stockfish / blobdiff