X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=inline;f=src%2Fmisc.cpp;h=08df524bf26beb5bed4453910cc161b1ed8364a3;hb=1d09ee70f7da1f9aa60c7ff97a35881327f69a03;hp=357a3d14d26c3f791b91c7c83779708b275e2bf2;hpb=d3600c39a745179ed6b094b305d0645e83a1ee86;p=stockfish
diff --git a/src/misc.cpp b/src/misc.cpp
index 357a3d14..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 Marco Costalba
+ 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
@@ -17,192 +18,170 @@
along with this program. If not, see .
*/
+#include
+#include
+#include
+#include
-////
-//// Includes
-////
+#include "misc.h"
+#include "thread.h"
-#if !defined(_MSC_VER)
+using namespace std;
-# include
-# include
-# include
+namespace {
-#else
+/// Version number. If Version is left empty, then compile date in the format
+/// DD-MM-YY and show in engine_info.
+const string Version = "";
-# include
-# include
-# include "dos.h"
-int gettimeofday(struct timeval * tp, struct timezone * tzp);
+/// 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
-#endif
+struct Tie: public streambuf { // MSVC requires split streambuf for cin and cout
-#include
-#include
-#include
-#include
+ Tie(streambuf* b, streambuf* l) : buf(b), logBuf(l) {}
-#include "misc.h"
+ 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, *logBuf;
-////
-//// Variables
-////
+ int log(int c, const char* prefix) {
-long dbg_cnt0 = 0;
-long dbg_cnt1 = 0;
+ static int last = '\n'; // Single log file
-bool dbg_show_mean = false;
-bool dbg_show_hit_rate = false;
+ if (last == '\n')
+ logBuf->sputn(prefix, 3);
+ return last = logBuf->sputc((char)c);
+ }
+};
-////
-//// Functions
-////
+class Logger {
-void dbg_print_hit_rate() {
+ Logger() : in(cin.rdbuf(), file.rdbuf()), out(cout.rdbuf(), file.rdbuf()) {}
+ ~Logger() { start(""); }
- std::cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
- << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1)
- << std::endl;
-}
+ ofstream file;
+ Tie in, out;
-void dbg_print_mean() {
+public:
+ static void start(const std::string& fname) {
- std::cout << "Total " << dbg_cnt0 << " Mean "
- << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << std::endl;
-}
+ static Logger l;
+
+ if (!fname.empty() && !l.file.is_open())
+ {
+ l.file.open(fname, ifstream::out);
+ cin.rdbuf(&l.in);
+ cout.rdbuf(&l.out);
+ }
+ else if (fname.empty() && l.file.is_open())
+ {
+ cout.rdbuf(l.out.buf);
+ cin.rdbuf(l.in.buf);
+ l.file.close();
+ }
+ }
+};
-/// 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 ", depending on whether
-/// the constant EngineVersion (defined in misc.h) is empty.
+} // namespace
-const std::string engine_name() {
+/// 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.
- if (EngineVersion.empty())
- {
- std::string date(__DATE__); // From compiler, format is "Sep 21 2008"
- std::string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
+const string engine_info(bool to_uci) {
- size_t mon = 1 + months.find(date.substr(0, 3)) / 4;
+ 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"
- std::stringstream s;
- std::string day = (date[4] == ' ' ? date.substr(5, 1) : date.substr(4, 2));
+ ss << "Stockfish " << Version << setfill('0');
- s << "Stockfish " << date.substr(date.length() - 2) << std::setfill('0')
- << std::setw(2) << mon << std::setw(2) << day;
+ if (Version.empty())
+ {
+ date >> month >> day >> year;
+ ss << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2);
+ }
- return s.str();
- } else
- return "Stockfish " + EngineVersion;
+ ss << (Is64Bit ? " 64" : "")
+ << (HasPext ? " BMI2" : (HasPopCnt ? " POPCNT" : ""))
+ << (to_uci ? "\nid author ": " by ")
+ << "T. Romstad, M. Costalba, J. Kiiski, G. Linscott";
+
+ return ss.str();
}
-/// get_system_time() returns the current system time, measured in
-/// milliseconds.
+/// 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() {
-int get_system_time() {
- struct timeval t;
- gettimeofday(&t, NULL);
- return t.tv_sec*1000 + t.tv_usec/1000;
+ 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;
}
-/// cpu_count() tries to detect the number of CPU cores.
+/// Used to serialize access to std::cout to avoid multiple threads writing 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), 8);
-}
-# else
-int cpu_count() {
- return 1;
-}
-# endif
+ static Mutex m;
-#else
+ if (sc == IO_LOCK)
+ m.lock();
+
+ if (sc == IO_UNLOCK)
+ m.unlock();
-int cpu_count() {
- SYSTEM_INFO s;
- GetSystemInfo(&s);
- return Min(s.dwNumberOfProcessors, 8);
+ return os;
}
-#endif
+/// Trampoline helper to avoid moving Logger to misc.h
+void start_logger(const std::string& fname) { Logger::start(fname); }
-/*
- From Beowulf, from Olithink
-*/
-#ifndef _WIN32
-/* Non-windows version */
-int Bioskey()
-{
- fd_set readfds;
- struct timeval timeout;
-
- FD_ZERO(&readfds);
- FD_SET(fileno(stdin), &readfds);
- /* Set to timeout immediately */
- timeout.tv_sec = 0;
- timeout.tv_usec = 0;
- select(16, &readfds, 0, 0, &timeout);
-
- return (FD_ISSET(fileno(stdin), &readfds));
-}
+
+/// 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
-/* Windows-version */
-#include
-#include
-int Bioskey()
-{
- static int init = 0,
- pipe;
- static HANDLE inh;
- DWORD dw;
- /* If we're running under XBoard then we can't use _kbhit() as the input
- * commands are sent to us directly over the internal pipe */
-
-#if defined(FILE_CNT)
- if (stdin->_cnt > 0)
- return stdin->_cnt;
-#endif
- if (!init) {
- init = 1;
- inh = GetStdHandle(STD_INPUT_HANDLE);
- pipe = !GetConsoleMode(inh, &dw);
- if (!pipe) {
- SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT));
- FlushConsoleInputBuffer(inh);
- }
- }
- if (pipe) {
- if (!PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL))
- return 1;
- return dw;
- } else {
- // Count the number of unread input records, including keyboard,
- // mouse, and window-resizing input records.
- GetNumberOfConsoleInputEvents(inh, &dw);
- if (dw <= 0)
- return 0;
-
- // Read data from console without removing it from the buffer
- INPUT_RECORD rec[256];
- DWORD recCnt;
- if (!PeekConsoleInput(inh, rec, Min(dw, 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;
- }
+
+void prefetch(void* addr) {
+
+# 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
+
+# if defined(__INTEL_COMPILER) || defined(_MSC_VER)
+ _mm_prefetch((char*)addr, _MM_HINT_T0);
+# else
+ __builtin_prefetch(addr);
+# endif
}
+
#endif