/*
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) 2008-2013 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/>.
*/
-
-////
-//// Includes
-////
-
-#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
-#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 "bitcount.h"
#include "misc.h"
#include "thread.h"
using namespace std;
-/// Version number. If this is left empty, the current date (in the format
-/// YYMMDD) is used as a version number.
+/// 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 = "";
-static const string EngineVersion = "";
-static const string AppName = "Stockfish";
-static const string AppTag = "";
+/// 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.
-////
-//// Variables
-////
+const string engine_info(bool to_uci) {
-static uint64_t dbg_cnt0 = 0;
-static uint64_t dbg_cnt1 = 0;
-
-bool dbg_show_mean = false;
-bool dbg_show_hit_rate = false;
+ 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');
-////
-//// Functions
-////
+ if (Version.empty())
+ {
+ date >> month >> day >> year;
+ s << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2);
+ }
-void dbg_hit_on(bool b) {
+ s << (Is64Bit ? " 64" : "")
+ << (HasPopCnt ? " SSE4.2" : "")
+ << (to_uci ? "\nid author ": " by ")
+ << "Tord Romstad, Marco Costalba and Joona Kiiski";
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt0++;
- if (b)
- dbg_cnt1++;
+ return s.str();
}
-void dbg_hit_on_c(bool c, bool b) {
-
- if (c)
- dbg_hit_on(b);
-}
-void dbg_before() {
+/// Debug functions used mainly to collect run-time statistics
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt0++;
-}
+static uint64_t hits[2], means[2];
-void dbg_after() {
+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; }
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt1++;
-}
+void dbg_print() {
-void dbg_mean_of(int v) {
+ if (hits[0])
+ cerr << "Total " << hits[0] << " Hits " << hits[1]
+ << " hit rate (%) " << 100 * hits[1] / hits[0] << endl;
- assert(!dbg_show_hit_rate);
- dbg_show_mean = true;
- dbg_cnt0++;
- dbg_cnt1 += v;
+ if (means[0])
+ cerr << "Total " << means[0] << " Mean "
+ << (float)means[1] / means[0] << endl;
}
-void dbg_print_hit_rate() {
- cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
- << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl;
-}
+/// 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
-void dbg_print_mean() {
+struct Tie: public streambuf { // MSVC requires splitted streambuf for cin and cout
- cout << "Total " << dbg_cnt0 << " Mean "
- << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl;
-}
+ Tie(streambuf* b, ofstream* f) : buf(b), file(f) {}
+ 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(), ">> "); }
-/// 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 <version number>", depending
-/// on whether the constant EngineVersion (defined in misc.h) is empty.
+ streambuf* buf;
+ ofstream* file;
-const string engine_name() {
+ int log(int c, const char* prefix) {
- const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
- const string cpu64(CpuIs64Bit ? " 64bit" : "");
+ static int last = '\n';
- if (!EngineVersion.empty())
- return AppName + " " + EngineVersion + cpu64;
+ if (last == '\n')
+ file->rdbuf()->sputn(prefix, 3);
- stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008"
- string month, day, year;
+ return last = file->rdbuf()->sputc((char)c);
+ }
+};
- date >> month >> day >> year;
+class Logger {
- s << setfill('0') << AppName + " " + AppTag + " "
- << year.substr(2, 2) << setw(2)
- << (1 + months.find(month) / 4) << setw(2)
- << day << cpu64;
-
- return s.str();
-}
+ Logger() : in(cin.rdbuf(), &file), out(cout.rdbuf(), &file) {}
+ ~Logger() { start(false); }
+ 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();
+ }
+ }
+};
-/// cpu_count() tries to detect the number of CPU cores.
+/// Used to serialize access to std::cout to avoid multiple threads to write at
+/// the same time.
-#if !defined(_MSC_VER)
+std::ostream& operator<<(std::ostream& os, SyncCout sc) {
-# if defined(_SC_NPROCESSORS_ONLN)
-int cpu_count() {
- return Min(sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS);
-}
-# elif defined(__hpux)
-int cpu_count() {
- struct pst_dynamic psd;
- if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1)
- return 1;
+ static Mutex m;
- return Min(psd.psd_proc_cnt, MAX_THREADS);
-}
-# else
-int cpu_count() {
- return 1;
-}
-# endif
+ if (sc == io_lock)
+ m.lock();
-#else
+ if (sc == io_unlock)
+ m.unlock();
-int cpu_count() {
- SYSTEM_INFO s;
- GetSystemInfo(&s);
- return Min(s.dwNumberOfProcessors, MAX_THREADS);
+ return os;
}
-#endif
-
-/// Check for console input. Original code from Beowulf, Olithink and Greko
+/// Trampoline helper to avoid moving Logger to misc.h
+void start_logger(bool b) { Logger::start(b); }
-#ifndef _WIN32
-int input_available()
-{
- fd_set readfds;
- struct timeval timeout;
+/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap
+/// conversion from milliseconds to struct timespec, as used by pthreads.
- 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);
-
- return (FD_ISSET(fileno(stdin), &readfds));
-}
+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;
-int input_available()
-{
- static HANDLE inh = NULL;
- static bool usePipe = false;
- INPUT_RECORD rec[256];
- DWORD nchars, recCnt;
-
- 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;
- }
+ ts.tv_sec = ms / 1000;
+ ts.tv_nsec = (ms % 1000) * 1000000LL;
+#endif
- // 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;
+ cond_timedwait(sleepCond, sleepLock, tm);
}
-#endif
-
/// 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 RAM, that can be very slow.
-#if defined(NO_PREFETCH)
+/// loaded from memory, that can be quite slow.
+#ifdef NO_PREFETCH
+
void prefetch(char*) {}
+
#else
void prefetch(char* addr) {
-#if defined(__INTEL_COMPILER) || defined(__ICL)
+# if defined(__INTEL_COMPILER)
// 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
+# if defined(__INTEL_COMPILER) || defined(_MSC_VER)
+ _mm_prefetch(addr, _MM_HINT_T0);
+# else
+ __builtin_prefetch(addr);
+# endif
}
#endif
-
projects / stockfish / blobdiff