Fix ambiguity between clamp implementations

[stockfish] / src / misc.h

diff --git a/src/misc.h b/src/misc.h
index 37f1e706347b5e55d54d7dbc514207b49a2c330b..e0e0e98be8357cee894b2133ead6f654c0abc3f4 100644 (file)
--- a/src/misc.h
+++ b/src/misc.h
@@ -2,6 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   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
@@ -29,8 +30,10 @@
 #include "types.h"
 
 const std::string engine_info(bool to_uci = false);
+const std::string compiler_info();
 void prefetch(void* addr);
-void start_logger(bool b);
+void start_logger(const std::string& fname);
+void* aligned_ttmem_alloc(size_t size, void*& mem);
 
 void dbg_hit_on(bool b);
 void dbg_hit_on(bool c, bool b);
@@ -39,6 +42,8 @@ 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();
@@ -49,7 +54,7 @@ struct HashTable {
   Entry* operator[](Key key) { return &table[(uint32_t)key & (Size - 1)]; }
 
 private:
-  std::vector<Entry> table = std::vector<Entry>(Size);
+  std::vector<Entry> table = std::vector<Entry>(Size); // Allocate on the heap
 };
 
 
@@ -59,6 +64,14 @@ std::ostream& operator<<(std::ostream&, SyncCout);
 #define sync_cout std::cout << IO_LOCK
 #define sync_endl std::endl << IO_UNLOCK
 
+namespace Utility {
+
+/// Clamp a value between lo and hi. Available in c++17.
+template<class T> constexpr const T& clamp(const T& v, const T& lo, const T& hi) {
+  return v < lo ? lo : v > hi ? hi : v;
+}
+
+}
 
 /// xorshift64star Pseudo-Random Number Generator
 /// This class is based on original code written and dedicated
@@ -96,4 +109,15 @@ public:
   { 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 Österlund.
+
+namespace WinProcGroup {
+  void bindThisThread(size_t idx);
+}
+
 #endif // #ifndef MISC_H_INCLUDED