2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
7 * This file is part of InspIRCd. InspIRCd is free software: you can
8 * redistribute it and/or modify it under the terms of the GNU General Public
9 * License as published by the Free Software Foundation, version 2.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
28 /** The ThreadEngine class has the responsibility of initialising
29 * Thread derived classes. It does this by creating operating system
30 * level threads which are then associated with the class transparently.
31 * This allows Thread classes to be derived without needing to know how
32 * the OS implements threads. You should ensure that any sections of code
33 * that use threads are threadsafe and do not interact with any other
34 * parts of the code which are NOT known threadsafe! If you really MUST
35 * access non-threadsafe code from a Thread, use the Mutex class to wrap
36 * access to the code carefully.
38 class CoreExport ThreadEngine
41 static DWORD WINAPI Entry(void* parameter);
43 /** Create a new thread. This takes an already allocated
44 * Thread* pointer and initializes it to use this threading
45 * engine. On failure, this function may throw a CoreException.
46 * @param thread_to_init Pointer to a newly allocated Thread
49 void Start(Thread* thread_to_init);
52 class CoreExport ThreadData
56 void FreeThread(Thread* toFree);
59 /** The Mutex class represents a mutex, which can be used to keep threads
60 * properly synchronised. Use mutexes sparingly, as they are a good source
61 * of thread deadlocks etc, and should be avoided except where absolutely
62 * neccessary. Note that the internal behaviour of the mutex varies from OS
63 * to OS depending on the thread engine, for example in windows a Mutex
64 * in InspIRCd uses critical sections, as they are faster and simpler to
67 class CoreExport Mutex
70 CRITICAL_SECTION wutex;
74 InitializeCriticalSection(&wutex);
78 EnterCriticalSection(&wutex);
82 LeaveCriticalSection(&wutex);
86 DeleteCriticalSection(&wutex);
92 CRITICAL_SECTION mutex;
97 event = CreateEvent(NULL, false, false, NULL);
99 throw CoreException("CreateEvent() failed in ThreadQueueData::ThreadQueueData()!");
100 InitializeCriticalSection(&mutex);
106 DeleteCriticalSection(&mutex);
111 EnterCriticalSection(&mutex);
116 LeaveCriticalSection(&mutex);
126 LeaveCriticalSection(&mutex);
127 WaitForSingleObject(event, INFINITE);
128 EnterCriticalSection(&mutex);
132 class ThreadSignalData