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/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_BASE_THREAD_H__
#define TALK_BASE_THREAD_H__
#include <algorithm>
#include <list>
#include <vector>
#ifdef POSIX
#include <pthread.h>
#endif
#include "talk/base/messagequeue.h"
#ifdef WIN32
#include "talk/base/win32.h"
#endif
namespace talk_base {
class Thread;
class ThreadManager {
public:
ThreadManager();
~ThreadManager();
static Thread *CurrentThread();
static void SetCurrent(Thread *thread);
void Add(Thread *thread);
void Remove(Thread *thread);
private:
Thread *main_thread_;
std::vector<Thread *> threads_;
CriticalSection crit_;
#ifdef POSIX
static pthread_key_t key_;
#endif
#ifdef WIN32
static DWORD key_;
#endif
};
class Thread;
struct _SendMessage {
_SendMessage() {}
Thread *thread;
Message msg;
bool *ready;
};
enum ThreadPriority {
PRIORITY_NORMAL,
PRIORITY_IDLE,
};
class Thread : public MessageQueue {
public:
Thread(SocketServer* ss = 0);
virtual ~Thread();
static inline Thread* Current() {
return ThreadManager::CurrentThread();
}
inline bool IsCurrent() const {
return (ThreadManager::CurrentThread() == this);
}
void SetPriority(ThreadPriority priority) {
priority_ = priority;
}
virtual void Start();
virtual void Stop();
// By default, Thread::Run() calls ProcessMessages(kForever). To do other
// work, override Run(). To receive and dispatch messages, call
// ProcessMessages occasionally.
virtual void Run();
virtual void Send(MessageHandler *phandler, uint32 id = 0,
MessageData *pdata = NULL);
// From MessageQueue
virtual void Clear(MessageHandler *phandler, uint32 id = (uint32)-1);
virtual void ReceiveSends();
// ProcessMessages will process I/O and dispatch messages until:
// 1) cms milliseconds have elapsed (returns true)
// 2) Stop() is called (returns false)
bool ProcessMessages(int cms);
#ifdef WIN32
HANDLE GetHandle() {
return thread_;
}
#endif
private:
static void *PreRun(void *pv);
void Join();
std::list<_SendMessage> sendlist_;
ThreadPriority priority_;
bool started_;
bool has_sends_;
#ifdef POSIX
pthread_t thread_;
#endif
#ifdef WIN32
HANDLE thread_;
#endif
friend class ThreadManager;
};
// AutoThread automatically installs itself at construction
// uninstalls at destruction, if a Thread object is
// _not already_ associated with the current OS thread.
class AutoThread : public Thread {
public:
AutoThread(SocketServer* ss = 0);
virtual ~AutoThread();
};
} // namespace talk_base
#endif // TALK_BASE_THREAD_H__
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