+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
+ *
+ * This file is part of InspIRCd. InspIRCd 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.
+ *
+ * This program 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. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+#include "config.h"
+#include "base.h"
+
+class Thread;
+
+/** The ThreadEngine class has the responsibility of initialising
+ * Thread derived classes. It does this by creating operating system
+ * level threads which are then associated with the class transparently.
+ * This allows Thread classes to be derived without needing to know how
+ * the OS implements threads. You should ensure that any sections of code
+ * that use threads are threadsafe and do not interact with any other
+ * parts of the code which are NOT known threadsafe! If you really MUST
+ * access non-threadsafe code from a Thread, use the Mutex class to wrap
+ * access to the code carefully.
+ */
+class CoreExport ThreadEngine
+{
+ public:
+
+ ThreadEngine();
+
+ virtual ~ThreadEngine();
+
+ static DWORD WINAPI Entry(void* parameter);
+
+ /** Create a new thread. This takes an already allocated
+ * Thread* pointer and initializes it to use this threading
+ * engine. On failure, this function may throw a CoreException.
+ * @param thread_to_init Pointer to a newly allocated Thread
+ * derived object.
+ */
+ void Start(Thread* thread_to_init);
+
+ /** Returns the thread engine's name for display purposes
+ * @return The thread engine name
+ */
+ const std::string GetName()
+ {
+ return "windows-thread";
+ }
+};
+
+class CoreExport ThreadData
+{
+ public:
+ HANDLE handle;
+ void FreeThread(Thread* toFree);
+};
+
+/** The Mutex class represents a mutex, which can be used to keep threads
+ * properly synchronised. Use mutexes sparingly, as they are a good source
+ * of thread deadlocks etc, and should be avoided except where absolutely
+ * neccessary. Note that the internal behaviour of the mutex varies from OS
+ * to OS depending on the thread engine, for example in windows a Mutex
+ * in InspIRCd uses critical sections, as they are faster and simpler to
+ * manage.
+ */
+class CoreExport Mutex
+{
+ private:
+ CRITICAL_SECTION wutex;
+ public:
+ Mutex()
+ {
+ InitializeCriticalSection(&wutex);
+ }
+ void Lock()
+ {
+ EnterCriticalSection(&wutex);
+ }
+ void Unlock()
+ {
+ LeaveCriticalSection(&wutex);
+ }
+ ~Mutex()
+ {
+ DeleteCriticalSection(&wutex);
+ }
+};
+
+class ThreadQueueData
+{
+ CRITICAL_SECTION mutex;
+ HANDLE event;
+ public:
+ ThreadQueueData()
+ {
+ event = CreateEvent(NULL, false, false, NULL);
+ if (event == NULL)
+ throw CoreException("CreateEvent() failed in ThreadQueueData::ThreadQueueData()!");
+ InitializeCriticalSection(&mutex);
+ }
+
+ ~ThreadQueueData()
+ {
+ CloseHandle(event);
+ DeleteCriticalSection(&mutex);
+ }
+
+ void Lock()
+ {
+ EnterCriticalSection(&mutex);
+ }
+
+ void Unlock()
+ {
+ LeaveCriticalSection(&mutex);
+ }
+
+ void Wakeup()
+ {
+ PulseEvent(event);
+ }
+
+ void Wait()
+ {
+ LeaveCriticalSection(&mutex);
+ WaitForSingleObject(event, INFINITE);
+ EnterCriticalSection(&mutex);
+ }
+};
+
+class ThreadSignalData
+{
+ public:
+ int connFD;
+ ThreadSignalData()
+ {
+ connFD = -1;
+ }
+};