mirror of https://github.com/OpenTTD/OpenTTD.git
112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file thread_win32.cpp Win32 thread implementation of Threads. */
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#include "../stdafx.h"
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#include "thread.h"
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#include "../debug.h"
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#include "../core/alloc_func.hpp"
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#include <stdlib.h>
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#include <windows.h>
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#include <process.h>
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#include "../os/windows/win32.h"
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#include "../safeguards.h"
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/**
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* Win32 thread version for ThreadObject.
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*/
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class ThreadObject_Win32 : public ThreadObject {
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private:
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HANDLE thread; ///< System thread identifier.
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uint id; ///< Thread identifier.
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OTTDThreadFunc proc; ///< External thread procedure.
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void *param; ///< Parameter for the external thread procedure.
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bool self_destruct; ///< Free ourselves when done?
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const char *name; ///< Thread name.
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public:
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/**
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* Create a win32 thread and start it, calling proc(param).
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*/
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ThreadObject_Win32(OTTDThreadFunc proc, void *param, bool self_destruct, const char *name) :
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thread(NULL),
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id(0),
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proc(proc),
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param(param),
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self_destruct(self_destruct),
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name(name)
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{
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this->thread = (HANDLE)_beginthreadex(NULL, 0, &stThreadProc, this, CREATE_SUSPENDED, &this->id);
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if (this->thread == NULL) return;
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ResumeThread(this->thread);
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}
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~ThreadObject_Win32() override
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{
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if (this->thread != NULL) {
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CloseHandle(this->thread);
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this->thread = NULL;
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}
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}
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bool Exit() override
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{
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assert(GetCurrentThreadId() == this->id);
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/* For now we terminate by throwing an error, gives much cleaner cleanup */
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throw OTTDThreadExitSignal();
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}
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void Join() override
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{
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/* You cannot join yourself */
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assert(GetCurrentThreadId() != this->id);
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WaitForSingleObject(this->thread, INFINITE);
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}
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private:
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/**
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* On thread creation, this function is called, which calls the real startup
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* function. This to get back into the correct instance again.
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*/
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static uint CALLBACK stThreadProc(void *thr)
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{
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((ThreadObject_Win32 *)thr)->ThreadProc();
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return 0;
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}
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/**
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* A new thread is created, and this function is called. Call the custom
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* function of the creator of the thread.
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*/
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void ThreadProc()
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{
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#ifdef _MSC_VER
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/* Set thread name for debuggers. Has to be done from the thread due to a race condition in older MS debuggers. */
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SetWin32ThreadName(-1, this->name);
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#endif
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try {
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this->proc(this->param);
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} catch (OTTDThreadExitSignal) {
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} catch (...) {
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NOT_REACHED();
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}
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if (self_destruct) delete this;
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}
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};
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/* static */ bool ThreadObject::New(OTTDThreadFunc proc, void *param, ThreadObject **thread, const char *name)
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{
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ThreadObject *to = new ThreadObject_Win32(proc, param, thread == NULL, name);
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if (thread != NULL) *thread = to;
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return true;
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}
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