Merge remote-tracking branch 'upstream/master'

[stockfish] / src / thread_win32_osx.h

diff --git a/src/thread_win32_osx.h b/src/thread_win32_osx.h
index f8cb466b71e7d3544fe7522921561d1b44d8fdc3..1d9a834f600a9b07b307abbd46fe372fc596e131 100644 (file)
--- a/src/thread_win32_osx.h
+++ b/src/thread_win32_osx.h
@@ -1,8 +1,6 @@
 /*
   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) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2004-2024 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
@@ -23,46 +21,58 @@
 
 #include <thread>
 
-/// On OSX threads other than the main thread are created with a reduced stack
-/// size of 512KB by default, this is too low for deep searches, which require
-/// somewhat more than 1MB stack, so adjust it to TH_STACK_SIZE.
-/// The implementation calls pthread_create() with the stack size parameter
-/// equal to the linux 8MB default, on platforms that support it.
+// On OSX threads other than the main thread are created with a reduced stack
+// size of 512KB by default, this is too low for deep searches, which require
+// somewhat more than 1MB stack, so adjust it to TH_STACK_SIZE.
+// The implementation calls pthread_create() with the stack size parameter
+// equal to the Linux 8MB default, on platforms that support it.
 
-#if defined(__APPLE__) || defined(__MINGW32__) || defined(__MINGW64__)
+#if defined(__APPLE__) || defined(__MINGW32__) || defined(__MINGW64__) || defined(USE_PTHREADS)
 
-#include <pthread.h>
+    #include <pthread.h>
+    #include <functional>
 
-static const size_t TH_STACK_SIZE = 8 * 1024 * 1024;
-
-template <class T, class P = std::pair<T*, void(T::*)()>>
-void* start_routine(void* ptr)
-{
-   P* p = reinterpret_cast<P*>(ptr);
-   (p->first->*(p->second))(); // Call member function pointer
-   delete p;
-   return NULL;
-}
+namespace Stockfish {
 
 class NativeThread {
+    pthread_t thread;
+
+    static constexpr size_t TH_STACK_SIZE = 8 * 1024 * 1024;
+
+   public:
+    template<class Function, class... Args>
+    explicit NativeThread(Function&& fun, Args&&... args) {
+        auto func = new std::function<void()>(
+          std::bind(std::forward<Function>(fun), std::forward<Args>(args)...));
+
+        pthread_attr_t attr_storage, *attr = &attr_storage;
+        pthread_attr_init(attr);
+        pthread_attr_setstacksize(attr, TH_STACK_SIZE);
+
+        auto start_routine = [](void* ptr) -> void* {
+            auto f = reinterpret_cast<std::function<void()>*>(ptr);
+            // Call the function
+            (*f)();
+            delete f;
+            return nullptr;
+        };
 
-   pthread_t thread;
-
-public:
-  template<class T, class P = std::pair<T*, void(T::*)()>>
-  explicit NativeThread(void(T::*fun)(), T* obj) {
-    pthread_attr_t attr_storage, *attr = &attr_storage;
-    pthread_attr_init(attr);
-    pthread_attr_setstacksize(attr, TH_STACK_SIZE);
-    pthread_create(&thread, attr, start_routine<T>, new P(obj, fun));
-  }
-  void join() { pthread_join(thread, NULL); }
+        pthread_create(&thread, attr, start_routine, func);
+    }
+
+    void join() { pthread_join(thread, nullptr); }
 };
 
-#else // Default case: use STL classes
+}  // namespace Stockfish
+
+#else  // Default case: use STL classes
+
+namespace Stockfish {
+
+using NativeThread = std::thread;
 
-typedef std::thread NativeThread;
+}  // namespace Stockfish
 
 #endif
 
-#endif // #ifndef THREAD_WIN32_OSX_H_INCLUDED
+#endif  // #ifndef THREAD_WIN32_OSX_H_INCLUDED