Modernize Thread

- Based on C++11's `thread` and `thread_local`
- No more need to allocate-deallocate or check for null
- No pointer anymore, just a member variable
- Platform-specific implementations no longer needed (except for the few cases of non-portable functions)
- Simpler for `NO_THREADS`
- Thread ids are now the same across platforms (main is 1; others follow)

2 files changed, 0 insertions, 155 deletions

diff --git a/drivers/windows/thread_windows.cpp b/drivers/windows/thread_windows.cpp
deleted file mode 100644
index ec95c9523d..0000000000
--- a/drivers/windows/thread_windows.cpp
+++ /dev/null
@@ -1,88 +0,0 @@
-/*************************************************************************/
-/*  thread_windows.cpp                                                   */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                      https://godotengine.org                          */
-/*************************************************************************/
-/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
-/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
-/*                                                                       */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the       */
-/* "Software"), to deal in the Software without restriction, including   */
-/* without limitation the rights to use, copy, modify, merge, publish,   */
-/* distribute, sublicense, and/or sell copies of the Software, and to    */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions:                                             */
-/*                                                                       */
-/* The above copyright notice and this permission notice shall be        */
-/* included in all copies or substantial portions of the Software.       */
-/*                                                                       */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-/*************************************************************************/
-
-#include "thread_windows.h"
-
-#if defined(WINDOWS_ENABLED) && !defined(UWP_ENABLED)
-
-#include "core/os/memory.h"
-
-Thread::ID ThreadWindows::get_id() const {
-	return id;
-}
-
-Thread *ThreadWindows::create_thread_windows() {
-	return memnew(ThreadWindows);
-}
-
-DWORD ThreadWindows::thread_callback(LPVOID userdata) {
-	ThreadWindows *t = reinterpret_cast<ThreadWindows *>(userdata);
-
-	ScriptServer::thread_enter(); //scripts may need to attach a stack
-
-	t->id = (ID)GetCurrentThreadId(); // must implement
-	t->callback(t->user);
-	SetEvent(t->handle);
-
-	ScriptServer::thread_exit();
-
-	return 0;
-}
-
-Thread *ThreadWindows::create_func_windows(ThreadCreateCallback p_callback, void *p_user, const Settings &) {
-	ThreadWindows *tr = memnew(ThreadWindows);
-	tr->callback = p_callback;
-	tr->user = p_user;
-	tr->handle = CreateEvent(nullptr, TRUE, FALSE, nullptr);
-
-	QueueUserWorkItem(thread_callback, tr, WT_EXECUTELONGFUNCTION);
-
-	return tr;
-}
-
-Thread::ID ThreadWindows::get_thread_id_func_windows() {
-	return (ID)GetCurrentThreadId(); //must implement
-}
-
-void ThreadWindows::wait_to_finish_func_windows(Thread *p_thread) {
-	ThreadWindows *tp = static_cast<ThreadWindows *>(p_thread);
-	ERR_FAIL_COND(!tp);
-	WaitForSingleObject(tp->handle, INFINITE);
-	CloseHandle(tp->handle);
-	//`memdelete(tp);
-}
-
-void ThreadWindows::make_default() {
-	create_func = create_func_windows;
-	get_thread_id_func = get_thread_id_func_windows;
-	wait_to_finish_func = wait_to_finish_func_windows;
-}
-
-#endif
diff --git a/drivers/windows/thread_windows.h b/drivers/windows/thread_windows.h
deleted file mode 100644
index 3801bddc2c..0000000000
--- a/drivers/windows/thread_windows.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/*************************************************************************/
-/*  thread_windows.h                                                     */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                      https://godotengine.org                          */
-/*************************************************************************/
-/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
-/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
-/*                                                                       */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the       */
-/* "Software"), to deal in the Software without restriction, including   */
-/* without limitation the rights to use, copy, modify, merge, publish,   */
-/* distribute, sublicense, and/or sell copies of the Software, and to    */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions:                                             */
-/*                                                                       */
-/* The above copyright notice and this permission notice shall be        */
-/* included in all copies or substantial portions of the Software.       */
-/*                                                                       */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-/*************************************************************************/
-
-#ifndef THREAD_WINDOWS_H
-#define THREAD_WINDOWS_H
-
-#ifdef WINDOWS_ENABLED
-
-#include "core/object/script_language.h"
-#include "core/os/thread.h"
-
-#include <windows.h>
-
-class ThreadWindows : public Thread {
-	ThreadCreateCallback callback;
-	void *user;
-	ID id;
-	HANDLE handle = nullptr;
-
-	static Thread *create_thread_windows();
-
-	static DWORD WINAPI thread_callback(LPVOID userdata);
-
-	static Thread *create_func_windows(ThreadCreateCallback p_callback, void *, const Settings &);
-	static ID get_thread_id_func_windows();
-	static void wait_to_finish_func_windows(Thread *p_thread);
-
-	ThreadWindows() {}
-
-public:
-	virtual ID get_id() const;
-
-	static void make_default();
-
-	~ThreadWindows() {}
-};
-
-#endif
-
-#endif