/*
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) 2015-2019 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
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-
-#if !defined(MISC_H_INCLUDED)
+#ifndef MISC_H_INCLUDED
#define MISC_H_INCLUDED
+#include <cassert>
+#include <chrono>
+#include <ostream>
+#include <string>
+#include <vector>
+
+#include "types.h"
-////
-//// Includes
-////
+const std::string engine_info(bool to_uci = false);
+void prefetch(void* addr);
+void start_logger(const std::string& fname);
-#include <string>
+void dbg_hit_on(bool b);
+void dbg_hit_on(bool c, bool b);
+void dbg_mean_of(int v);
+void dbg_print();
+
+typedef std::chrono::milliseconds::rep TimePoint; // A value in milliseconds
+
+static_assert(sizeof(TimePoint) == sizeof(int64_t), "TimePoint should be 64 bits");
+
+inline TimePoint now() {
+ return std::chrono::duration_cast<std::chrono::milliseconds>
+ (std::chrono::steady_clock::now().time_since_epoch()).count();
+}
+template<class Entry, int Size>
+struct HashTable {
+ Entry* operator[](Key key) { return &table[(uint32_t)key & (Size - 1)]; }
-////
-//// Constants
-////
+private:
+ std::vector<Entry> table = std::vector<Entry>(Size); // Allocate on the heap
+};
-/// Version number. If this is left empty, the current date (in the format
-/// YYMMDD) is used as a version number.
+enum SyncCout { IO_LOCK, IO_UNLOCK };
+std::ostream& operator<<(std::ostream&, SyncCout);
-const std::string EngineVersion = "1.01";
+#define sync_cout std::cout << IO_LOCK
+#define sync_endl std::endl << IO_UNLOCK
-////
-//// Macros
-////
+/// xorshift64star Pseudo-Random Number Generator
+/// This class is based on original code written and dedicated
+/// to the public domain by Sebastiano Vigna (2014).
+/// It has the following characteristics:
+///
+/// - Outputs 64-bit numbers
+/// - Passes Dieharder and SmallCrush test batteries
+/// - Does not require warm-up, no zeroland to escape
+/// - Internal state is a single 64-bit integer
+/// - Period is 2^64 - 1
+/// - Speed: 1.60 ns/call (Core i7 @3.40GHz)
+///
+/// For further analysis see
+/// <http://vigna.di.unimi.it/ftp/papers/xorshift.pdf>
-#define Min(x, y) (((x) < (y))? (x) : (y))
-#define Max(x, y) (((x) < (y))? (y) : (x))
+class PRNG {
+ uint64_t s;
-////
-//// Prototypes
-////
+ uint64_t rand64() {
-extern const std::string engine_name();
-extern int get_system_time();
-extern int cpu_count();
-extern int Bioskey();
+ s ^= s >> 12, s ^= s << 25, s ^= s >> 27;
+ return s * 2685821657736338717LL;
+ }
-////
-//// Debug
-////
-extern long dbg_cnt0;
-extern long dbg_cnt1;
+public:
+ PRNG(uint64_t seed) : s(seed) { assert(seed); }
-inline void dbg_hit_on(bool b) { dbg_cnt0++; if (b) dbg_cnt1++; }
-inline void dbg_hit_on_c(bool c, bool b) { if (c) dbg_hit_on(b); }
+ template<typename T> T rand() { return T(rand64()); }
-inline void dbg_before() { dbg_cnt0++; }
-inline void dbg_after() { dbg_cnt1++; }
+ /// Special generator used to fast init magic numbers.
+ /// Output values only have 1/8th of their bits set on average.
+ template<typename T> T sparse_rand()
+ { return T(rand64() & rand64() & rand64()); }
+};
-inline void dbg_mean_of(int v) { dbg_cnt0++; dbg_cnt1 += v; }
-extern void dbg_print_hit_rate();
-extern void dbg_print_mean();
+/// Under Windows it is not possible for a process to run on more than one
+/// logical processor group. This usually means to be limited to use max 64
+/// cores. To overcome this, some special platform specific API should be
+/// called to set group affinity for each thread. Original code from Texel by
+/// Peter Ă–sterlund.
-extern bool dbg_show_mean;
-extern bool dbg_show_hit_rate;
+namespace WinProcGroup {
+ void bindThisThread(size_t idx);
+}
-#endif // !defined(MISC_H_INCLUDED)
+#endif // #ifndef MISC_H_INCLUDED