X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmisc.h;h=f834e470cbf8799b49915196e8c805a3dd24139d;hb=f3b296c2e2061951d366edfbd5287f336e865553;hp=5f6166edf472be6faa646f3bf3c975c37fefbcb9;hpb=a1c02815ccc5824fe8737d1d6fab8aef09874a07;p=stockfish
diff --git a/src/misc.h b/src/misc.h
index 5f6166ed..f834e470 100644
--- a/src/misc.h
+++ b/src/misc.h
@@ -1,7 +1,6 @@
/*
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) 2004-2021 The Stockfish developers (see AUTHORS file)
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -17,59 +16,135 @@
along with this program. If not, see .
*/
-
-#if !defined(MISC_H_INCLUDED)
+#ifndef MISC_H_INCLUDED
#define MISC_H_INCLUDED
-
-////
-//// Includes
-////
-
-#include
+#include
+#include
+#include
#include
+#include
+#include
-#include "application.h"
#include "types.h"
-////
-//// Macros
-////
-
-#define Min(x, y) (((x) < (y))? (x) : (y))
-#define Max(x, y) (((x) < (y))? (y) : (x))
-
-
-////
-//// Prototypes
-////
-
-extern const std::string engine_name();
-extern int get_system_time();
-extern int cpu_count();
-extern int data_available();
-extern void prefetch(char* addr);
-extern void prefetchPawn(Key, int);
-
-
-////
-//// Debug
-////
-
-extern bool dbg_show_mean;
-extern bool dbg_show_hit_rate;
-
-extern uint64_t dbg_cnt0;
-extern uint64_t dbg_cnt1;
-
-extern void dbg_hit_on(bool b);
-extern void dbg_hit_on_c(bool c, bool b);
-extern void dbg_before();
-extern void dbg_after();
-extern void dbg_mean_of(int v);
-extern void dbg_print_hit_rate();
-extern void dbg_print_mean();
-extern void dbg_print_hit_rate(std::ofstream& logFile);
-extern void dbg_print_mean(std::ofstream& logFile);
-
-#endif // !defined(MISC_H_INCLUDED)
+namespace Stockfish {
+
+std::string engine_info(bool to_uci = false);
+std::string compiler_info();
+void prefetch(void* addr);
+void start_logger(const std::string& fname);
+void* std_aligned_alloc(size_t alignment, size_t size);
+void std_aligned_free(void* ptr);
+void* aligned_large_pages_alloc(size_t size); // memory aligned by page size, min alignment: 4096 bytes
+void aligned_large_pages_free(void* mem); // nop if mem == nullptr
+
+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::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
+};
+
+
+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
+
+// `ptr` must point to an array of size at least
+// `sizeof(T) * N + alignment` bytes, where `N` is the
+// number of elements in the array.
+template
+T* align_ptr_up(T* ptr)
+{
+ static_assert(alignof(T) < Alignment);
+
+ const uintptr_t ptrint = reinterpret_cast(reinterpret_cast(ptr));
+ return reinterpret_cast(reinterpret_cast((ptrint + (Alignment - 1)) / Alignment * Alignment));
+}
+
+/// 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()); }
+};
+
+inline uint64_t mul_hi64(uint64_t a, uint64_t b) {
+#if defined(__GNUC__) && defined(IS_64BIT)
+ __extension__ typedef unsigned __int128 uint128;
+ return ((uint128)a * (uint128)b) >> 64;
+#else
+ uint64_t aL = (uint32_t)a, aH = a >> 32;
+ uint64_t bL = (uint32_t)b, bH = b >> 32;
+ uint64_t c1 = (aL * bL) >> 32;
+ uint64_t c2 = aH * bL + c1;
+ uint64_t c3 = aL * bH + (uint32_t)c2;
+ return aH * bH + (c2 >> 32) + (c3 >> 32);
+#endif
+}
+
+/// 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);
+}
+
+namespace CommandLine {
+ void init(int argc, char* argv[]);
+
+ extern std::string binaryDirectory; // path of the executable directory
+ extern std::string workingDirectory; // path of the working directory
+}
+
+} // namespace Stockfish
+
+#endif // #ifndef MISC_H_INCLUDED