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/*
Copyright ©2006 Ricardo Pescuma Domenecci
Modified ©2008-2010 DeathAxe, Yasnovidyashii, Merlin, K. Romanov, Kreol
This program 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; either version 2
of the License, or (at your option) any later version.
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __CONTACTASYNCQUEUE_H__
#define __CONTACTASYNCQUEUE_H__
/**
*
*
**/
struct CQueueItem
{
DWORD check_time;
HCONTACT hContact;
PVOID param;
};
/**
*
*
**/
class CContactQueue
{
public:
enum EQueueStatus
{
RUNNING = 0,
STOPPING = 1,
STOPPED = 2
};
CContactQueue (int initialSize = 10);
~CContactQueue ();
inline int Size () const { return _queue.getCount();}
inline int Remove (int idx) { mir_free(_queue[idx]); return _queue.remove(idx);}
inline CQueueItem* Get (int idx) const { return _queue[idx];}
void RemoveAll();
/**
* This function removes all queue items for the hContact.
*
* @param hContact - the contact whose queue items to delete
*
* @return nothing
**/
void RemoveAll(HCONTACT hContact);
/**
* This function removes all queue items for the hContact considering the correct parameter.
*
* @param hContact - the contact whose queue items to delete
* @param param - a caller defined parameter passed to the callback function
*
* @return nothing
**/
void RemoveAllConsiderParam(HCONTACT hContact, PVOID param);
/**
* This method adds the desired new item.
*
* @param waitTime - the time to wait until the callback is desired to run
* @param hContact - the contact to perform the action for
* @param param - a caller defined parameter passed to the callback function
*
* @retval TRUE - The item is added to the queue successfully.
* @retval FALSE - The item is not added to the queue.
**/
BOOL Add(int waitTime, HCONTACT hContact, PVOID param = NULL);
/**
* This method adds the desired new item only, if the queue does not yet contain
* an item for the contact.
*
* @param waitTime - the time to wait until the callback is desired to run
* @param hContact - the contact to perform the action for
* @param param - a caller defined parameter passed to the callback function
*
* @retval TRUE - The item is added to the queue successfully.
* @retval FALSE - The item is not added to the queue.
**/
BOOL AddIfDontHave(int waitTime, HCONTACT hContact, PVOID param = NULL);
/**
* This method removes all existing queue items for the contact and adds a new queue item
* for the given contact. This method might be used to move an existing entry,
* whose check_time has changed.
*
* @param waitTime - the time to wait until the callback is desired to run
* @param hContact - the contact to perform the action for
* @param param - a caller defined parameter passed to the callback function
*
* @return nothing
**/
BOOL AddUnique(int waitTime, HCONTACT hContact, PVOID param = NULL);
/**
* This method removes all existing queue items for the contact with the same parameter as @e param
* and adds a new queue item for the given contact. This method might be used to move an existing
* entry, whose check_time has changed.
*
* @param waitTime - the time to wait until the callback is desired to run
* @param hContact - the contact to perform the action for
* @param param - a caller defined parameter passed to the callback function
*
* @return nothing
**/
BOOL AddUniqueConsiderParam (int waitTime, HCONTACT hContact, PVOID param = NULL);
/**
* This method resumes the worker thread and immitiatly goes on with the next entry.
*
* @param none
*
* @return nothing
**/
void ContinueWithNext();
protected:
virtual void OnEmpty () {};
virtual void Callback (HCONTACT hContact, PVOID param) = 0;
/**
* This is the real thread callback function. As long as _status
* is set to RUNNING it looks for items in the queue to perform
* the _pfnCallback function on them. If the queue is empty or the
* next upcoming item is located in the future, the thread is suspended
* in the meanwhile.
*
* @param none
*
* @return nothing
**/
void Thread();
/**
* This is a static method to redirect the thread's callback function
* to the desired class object.
*
* @param obj - pointer to the object (instance) of CContactQueue
*
* @return nothing
**/
static void ThreadProc(CContactQueue* obj)
{
obj->Thread();
}
/**
* This method suspends the worker thread for the given ammount of time.
*
* @param time - milliseconds to suspend the thread for
*
* @return nothing
**/
void Suspend(int time) const;
private:
LIST<CQueueItem> _queue;
CRITICAL_SECTION _cs;
HANDLE _hEvent;
EQueueStatus _status;
void Lock();
void Release();
/**
* This member function really adds an item into the time sorted queue list.
*
* @param waitTime - the time to wait until the callback is desired to run
* @param hContact - the contact to perform the action for
* @param param - a caller defined parameter passed to the callback function
*
* @retval TRUE - The item is added to the queue successfully.
* @retval FALSE - The item is not added to the queue.
**/
BOOL InternalAdd(int waitTime, HCONTACT hContact, PVOID param);
};
#endif // __CONTACTASYNCQUEUE_H__
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