X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmisc.h;h=b11c5aa843c5519a68699f115860419ca85f9eb7;hb=9cb1f9f2655cd378eec9d88fd57a039a04396aae;hp=f37fd5ef5763577bc05e081adc3ad21c3567037e;hpb=17d1940278aadde3d9d844f7c913ca6c8655bbf3;p=stockfish
diff --git a/src/misc.h b/src/misc.h
index f37fd5ef..b11c5aa8 100644
--- a/src/misc.h
+++ b/src/misc.h
@@ -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) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2015-2020 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
@@ -17,49 +18,97 @@
along with this program. If not, see .
*/
-#if !defined(MISC_H_INCLUDED)
+#ifndef MISC_H_INCLUDED
#define MISC_H_INCLUDED
-#include
+#include
+#include
+#include
#include
+#include
-#include "lock.h"
#include "types.h"
-extern const std::string engine_info(bool to_uci = false);
-extern int cpu_count();
-extern void timed_wait(WaitCondition&, Lock&, int);
-extern void prefetch(char* addr);
+const std::string engine_info(bool to_uci = false);
+const std::string compiler_info();
+void prefetch(void* addr);
+void start_logger(const std::string& fname);
-extern void dbg_hit_on(bool b);
-extern void dbg_hit_on_c(bool c, bool b);
-extern void dbg_mean_of(int v);
-extern void dbg_print();
+void dbg_hit_on(bool b);
+void dbg_hit_on(bool c, bool b);
+void dbg_mean_of(int v);
+void dbg_print();
-class Position;
-extern Move move_from_uci(const Position& pos, const std::string& str);
-extern const std::string move_to_uci(Move m, bool chess960);
-extern const std::string move_to_san(Position& pos, Move m);
+typedef std::chrono::milliseconds::rep TimePoint; // A value in milliseconds
+static_assert(sizeof(TimePoint) == sizeof(int64_t), "TimePoint should be 64 bits");
-struct Log : public std::ofstream {
- Log(const std::string& f = "log.txt") : std::ofstream(f.c_str(), std::ios::out | std::ios::app) {}
- ~Log() { if (is_open()) close(); }
+inline TimePoint now() {
+ return std::chrono::duration_cast
+ (std::chrono::steady_clock::now().time_since_epoch()).count();
+}
+
+template
+struct HashTable {
+ Entry* operator[](Key key) { return &table[(uint32_t)key & (Size - 1)]; }
+
+private:
+ std::vector table = std::vector(Size); // Allocate on the heap
};
-class Time {
+enum SyncCout { IO_LOCK, IO_UNLOCK };
+std::ostream& operator<<(std::ostream&, SyncCout);
+
+#define sync_cout std::cout << IO_LOCK
+#define sync_endl std::endl << IO_UNLOCK
+
+
+/// 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
+///
+
+class PRNG {
+
+ uint64_t s;
+
+ uint64_t rand64() {
+
+ s ^= s >> 12, s ^= s << 25, s ^= s >> 27;
+ return s * 2685821657736338717LL;
+ }
+
public:
- void restart() { system_time(&t); }
- uint64_t msec() const { return time_to_msec(t); }
- int elapsed() const { return int(current_time().msec() - time_to_msec(t)); }
+ PRNG(uint64_t seed) : s(seed) { assert(seed); }
- static Time current_time() { Time t; t.restart(); return t; }
+ template T rand() { return T(rand64()); }
-private:
- sys_time_t t;
+ /// Special generator used to fast init magic numbers.
+ /// Output values only have 1/8th of their bits set on average.
+ template T sparse_rand()
+ { return T(rand64() & rand64() & rand64()); }
};
-extern void start_logger(bool b);
-#endif // !defined(MISC_H_INCLUDED)
+/// 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 Ãsterlund.
+
+namespace WinProcGroup {
+ void bindThisThread(size_t idx);
+}
+
+#endif // #ifndef MISC_H_INCLUDED