X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=inline;f=src%2Fmisc.h;h=3cba486796bd93b0c5c83138f0f64e158cc3af0a;hb=79e3710fd224e6e052f6bc5420a8f8f03bf41e18;hp=c09d2c6b3125453bbb63c14a3427a1018938c9bc;hpb=c5ec94d0f1b128fc2c691c7231663a345409d5cc;p=stockfish
diff --git a/src/misc.h b/src/misc.h
index c09d2c6b..3cba4867 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) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad
+ 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
@@ -17,53 +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 "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);
-extern void start_logger(bool b);
+const std::string engine_info(bool to_uci = false);
+void prefetch(void* addr);
+void prefetch2(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();
+typedef std::chrono::milliseconds::rep TimePoint; // A value in milliseconds
-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(); }
-};
-
+static_assert(sizeof(TimePoint) == sizeof(int64_t), "TimePoint should be 64 bits");
-namespace Time {
- typedef int64_t point;
- point now();
+inline TimePoint now() {
+ return std::chrono::duration_cast
+ (std::chrono::steady_clock::now().time_since_epoch()).count();
}
-
template
struct HashTable {
- HashTable() : e(Size, Entry()) {}
- Entry* operator[](Key k) { return &e[(uint32_t)k & (Size - 1)]; }
+ Entry* operator[](Key key) { return &table[(uint32_t)key & (Size - 1)]; }
private:
- std::vector e;
+ std::vector table = std::vector(Size);
};
-enum SyncCout { io_lock, io_unlock };
+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
+#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:
+ PRNG(uint64_t seed) : s(seed) { assert(seed); }
+
+ template T rand() { return T(rand64()); }
+
+ /// 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()); }
+};
+
+
+/// 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 // !defined(MISC_H_INCLUDED)
+#endif // #ifndef MISC_H_INCLUDED