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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 __MESSAGEQUEUE_H__
#define __MESSAGEQUEUE_H__
#include "talk/base/basictypes.h"
#include "talk/base/criticalsection.h"
#include "talk/base/socketserver.h"
#include "talk/base/jtime.h"
#include <vector>
#include <queue>
#include <algorithm>
namespace cricket {
struct Message;
class MessageQueue;
class MessageHandler;
// MessageQueueManager does cleanup of of message queues
class MessageQueueManager {
public:
static MessageQueueManager* Instance();
void Add(MessageQueue *message_queue);
void Remove(MessageQueue *message_queue);
void Clear(MessageHandler *handler);
private:
MessageQueueManager();
~MessageQueueManager();
static MessageQueueManager* instance_;
std::vector<MessageQueue *> message_queues_;
CriticalSection crit_;
};
// Messages get dispatched to a MessageHandler
class MessageHandler {
public:
virtual ~MessageHandler() {
MessageQueueManager::Instance()->Clear(this);
}
virtual void OnMessage(Message *pmsg) = 0;
};
// Derive from this for specialized data
// App manages lifetime, except when messages are purged
class MessageData {
public:
MessageData() {}
virtual ~MessageData() {}
};
template <class arg1_type>
class TypedMessageData : public MessageData {
public:
TypedMessageData(arg1_type data) {
data_ = data;
}
arg1_type data() {
return data_;
}
private:
arg1_type data_;
};
// No destructor
struct Message {
Message() {
memset(this, 0, sizeof(*this));
}
MessageHandler *phandler;
uint32 message_id;
MessageData *pdata;
};
// DelayedMessage goes into a priority queue, sorted by trigger time
class DelayedMessage {
public:
DelayedMessage(int cmsDelay, Message *pmsg) {
cmsDelay_ = cmsDelay;
msTrigger_ = GetMillisecondCount() + cmsDelay;
msg_ = *pmsg;
}
bool operator< (const DelayedMessage& dmsg) const {
return dmsg.msTrigger_ < msTrigger_;
}
int cmsDelay_; // for debugging
uint32 msTrigger_;
Message msg_;
};
class MessageQueue {
public:
MessageQueue(SocketServer* ss = 0);
virtual ~MessageQueue();
SocketServer* socketserver() { return ss_; }
void set_socketserver(SocketServer* ss);
// Once the queue is stopped, all calls to Get/Peek will return false.
virtual void Stop();
virtual bool IsStopping();
virtual void Restart();
virtual bool Get(Message *pmsg, int cmsWait = -1);
virtual bool Peek(Message *pmsg, int cmsWait = 0);
virtual void Post(MessageHandler *phandler, uint32 id = 0,
MessageData *pdata = NULL);
virtual void PostDelayed(int cmsDelay, MessageHandler *phandler,
uint32 id = 0, MessageData *pdata = NULL);
virtual void Clear(MessageHandler *phandler, uint32 id = (uint32)-1);
virtual void Dispatch(Message *pmsg);
virtual void ReceiveSends();
virtual int GetDelay();
protected:
SocketServer* ss_;
bool new_ss;
bool fStop_;
bool fPeekKeep_;
Message msgPeek_;
std::queue<Message> msgq_;
std::priority_queue<DelayedMessage> dmsgq_;
CriticalSection crit_;
};
} // namespace cricket
#endif // __MESSAGEQUEUE_H__
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