/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2014 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
#define MISC_H_INCLUDED
#include <cassert>
+#include <chrono>
#include <ostream>
#include <string>
#include <vector>
+#include <cstdint>
#include "types.h"
-const std::string engine_info(bool to_uci = false);
-void timed_wait(WaitCondition&, Lock&, int);
-void prefetch(char* addr);
-void start_logger(bool b);
+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_c(bool c, bool b);
+void dbg_hit_on(bool c, bool b);
void dbg_mean_of(int v);
void dbg_print();
-
-namespace Time {
- typedef int64_t point;
- inline point now() { return system_time_to_msec(); }
+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 {
- HashTable() : table(Size, Entry()) {}
Entry* operator[](Key key) { return &table[(uint32_t)key & (Size - 1)]; }
private:
- std::vector<Entry> table;
+ std::vector<Entry> table = std::vector<Entry>(Size); // Allocate on the heap
};
#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 <uintptr_t Alignment, typename T>
+T* align_ptr_up(T* ptr)
+{
+ static_assert(alignof(T) < Alignment);
+
+ const uintptr_t ptrint = reinterpret_cast<uintptr_t>(reinterpret_cast<char*>(ptr));
+ return reinterpret_cast<T*>(reinterpret_cast<char*>((ptrint + (Alignment - 1)) / Alignment * Alignment));
+}
+
+template <typename T>
+class ValueListInserter {
+public:
+ ValueListInserter(T* v, std::size_t& s) :
+ values(v),
+ size(&s)
+ {
+ }
+
+ void push_back(const T& value) { values[(*size)++] = value; }
+private:
+ T* values;
+ std::size_t* size;
+};
+
+template <typename T, std::size_t MaxSize>
+class ValueList {
+
+public:
+ std::size_t size() const { return size_; }
+ void resize(std::size_t newSize) { size_ = newSize; }
+ void push_back(const T& value) { values_[size_++] = value; }
+ T& operator[](std::size_t index) { return values_[index]; }
+ T* begin() { return values_; }
+ T* end() { return values_ + size_; }
+ const T& operator[](std::size_t index) const { return values_[index]; }
+ const T* begin() const { return values_; }
+ const T* end() const { return values_ + size_; }
+ operator ValueListInserter<T>() { return ValueListInserter(values_, size_); }
+
+ void swap(ValueList& other) {
+ const std::size_t maxSize = std::max(size_, other.size_);
+ for (std::size_t i = 0; i < maxSize; ++i) {
+ std::swap(values_[i], other.values_[i]);
+ }
+ std::swap(size_, other.size_);
+ }
+
+private:
+ T values_[MaxSize];
+ std::size_t size_ = 0;
+};
/// xorshift64star Pseudo-Random Number Generator
/// This class is based on original code written and dedicated
{ 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 Ă–sterlund.
+
+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