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/*
* timer.h: Threaded timer class
*
* See the main source file 'xineliboutput.c' for copyright information and
* how to reach the author.
*
* $Id: timer.h,v 1.1 2006-06-03 10:04:28 phintuka Exp $
*
*/
#ifndef __XINELIBOUTPUT_TIMER_H
#define __XINELIBOUTPUT_TIMER_H
//
// cTimerCallback : timer callback handler interface
//
class cTimerCallback {
protected:
virtual bool TimerEvent() = 0; // return false to cancel timer
virtual void *TargetId() { return (void*)this; }
virtual int size() { return sizeof(*this); }
virtual bool is(void *data, int len)
{
return len==sizeof(*this) && TargetId()==data;
}
friend class cTimerThread;
public:
static void Set(cTimerCallback *, unsigned int TimeoutMs);
static void Cancel(cTimerCallback *);
virtual ~cTimerCallback();
};
//
// cTimerEvent : base class for timer events
//
class cTimerEvent : protected cTimerCallback {
private:
cTimerEvent(cTimerEvent&);
protected:
cTimerEvent() {};
virtual void AddEvent(unsigned int TimeoutMs);
static void CancelAll(void *Target);
template<class TCLASS> friend void CancelTimerEvents(TCLASS*);
friend class cTimerThread;
public:
static void Cancel(cTimerEvent *&);
};
//
// make gcc 3.4.5 happy
//
template<class TCLASS, class TRESULT>
cTimerEvent *CreateTimerEvent(TCLASS *c, TRESULT (TCLASS::*fp)(void),
unsigned int TimeoutMs);
template<class TCLASS, class TRESULT, class TARG1>
cTimerEvent *CreateTimerEvent(TCLASS *c, TRESULT (TCLASS::*fp)(TARG1),
TARG1 arg1,
unsigned int TimeoutMs);
template<class TCLASS>
cTimerEvent *CreateTimerEvent(TCLASS *c, void (TCLASS::*fp)(void),
unsigned int TimeoutMs, bool runOnce = true);
template<class TCLASS, class TARG1>
cTimerEvent *CreateTimerEvent(TCLASS *c, void (TCLASS::*fp)(TARG1),
TARG1 arg1,
unsigned int TimeoutMs, bool runOnce = true);
//
// Timer event templates
//
template <class TCLASS, class TRESULT>
class cTimerFunctorR0 : public cTimerEvent {
public:
protected:
typedef TRESULT (TCLASS::*TFUNC)(void);
cTimerFunctorR0(TCLASS *obj, TFUNC f, unsigned int TimeoutMs) :
m_obj(obj), m_f(f)
{
AddEvent(TimeoutMs);
}
virtual ~cTimerFunctorR0() {};
virtual bool TimerEvent(void)
{
return (*m_obj.*m_f)();
}
virtual void *TargetId() { return (void*)m_obj; }
virtual int size() { return sizeof(*this); }
virtual bool is(void *data, int len)
{
return sizeof(*this)==len && !memcmp(this,data,len);
}
private:
TCLASS *m_obj;
TFUNC m_f;
friend cTimerEvent *CreateTimerEvent<TCLASS,TRESULT>(TCLASS*,TFUNC,unsigned int);
};
template <class TCLASS, class TRESULT, class TARG1>
class cTimerFunctorR1 : public cTimerEvent {
public:
protected:
typedef TRESULT (TCLASS::*TFUNC)(TARG1);
cTimerFunctorR1(TCLASS *obj, TFUNC f, TARG1 arg1, unsigned int TimeoutMs) :
m_obj(obj), m_f(f), m_arg1(arg1)
{
AddEvent(TimeoutMs);
}
virtual ~cTimerFunctorR1() {};
virtual bool TimerEvent(void)
{
return (*m_obj.*m_f)(m_arg1);
}
virtual void *TargetId() { return (void*)m_obj; }
virtual int size() { return sizeof(*this); }
virtual bool is(void *data, int len)
{
return sizeof(*this)==len && !memcmp(this,data,len);
}
private:
TCLASS *m_obj;
TFUNC m_f;
TARG1 m_arg1;
friend cTimerEvent *CreateTimerEvent<TCLASS,TRESULT,TARG1>(TCLASS*,TFUNC,TARG1,unsigned int);
};
template <class TCLASS>
class cTimerFunctor0 : public cTimerEvent {
public:
protected:
typedef void (TCLASS::*TFUNC)(void);
cTimerFunctor0(TCLASS *obj, TFUNC f,
unsigned int TimeoutMs, bool runOnce) :
m_obj(obj), m_f(f), m_runAgain(!runOnce)
{
AddEvent(TimeoutMs);
}
virtual ~cTimerFunctor0() {};
virtual bool TimerEvent(void)
{
(*m_obj.*m_f)();
return m_runAgain;
}
virtual void *TargetId() { return (void*)m_obj; }
virtual int size() { return sizeof(*this); }
virtual bool is(void *data, int len)
{
return sizeof(*this)==len && !memcmp(this,data,len);
}
private:
TCLASS *m_obj;
TFUNC m_f;
bool m_runAgain;
friend cTimerEvent *CreateTimerEvent<TCLASS>(TCLASS*,TFUNC,unsigned int,bool);
};
template <class TCLASS, class TARG1>
class cTimerFunctor1 : public cTimerEvent {
public:
protected:
typedef void (TCLASS::*TFUNC)(TARG1);
cTimerFunctor1(TCLASS *obj, TFUNC f, TARG1 arg1,
unsigned int TimeoutMs, bool runOnce) :
m_obj(obj), m_f(f), m_arg1(arg1), m_runAgain(!runOnce)
{
AddEvent(TimeoutMs);
}
virtual ~cTimerFunctor1() {};
virtual bool TimerEvent(void)
{
(*m_obj.*m_f)(m_arg1);
return m_runAgain;
}
virtual void *TargetId() { return (void*)m_obj; }
virtual int size() { return sizeof(*this); }
virtual bool is(void *data, int len)
{
return sizeof(*this)==len && !memcmp(this,data,len);
}
private:
TCLASS *m_obj;
TFUNC m_f;
TARG1 m_arg1;
bool m_runAgain;
friend cTimerEvent *CreateTimerEvent<TCLASS,TARG1>(TCLASS*,TFUNC,TARG1,unsigned int,bool);
};
//
// Function templates for timer event creation and cancellation
//
template<class TCLASS, class TRESULT>
cTimerEvent *CreateTimerEvent(TCLASS *c, TRESULT (TCLASS::*fp)(void),
unsigned int TimeoutMs)
{
return new cTimerFunctorR0<TCLASS,TRESULT>(c,fp,TimeoutMs);
}
template<class TCLASS, class TRESULT, class TARG1>
cTimerEvent *CreateTimerEvent(TCLASS *c, TRESULT (TCLASS::*fp)(TARG1),
TARG1 arg1,
unsigned int TimeoutMs)
{
return new cTimerFunctorR1<TCLASS,TRESULT,TARG1>(c,fp,arg1,TimeoutMs);
}
template<class TCLASS>
cTimerEvent *CreateTimerEvent(TCLASS *c, void (TCLASS::*fp)(void),
unsigned int TimeoutMs, bool runOnce = true)
{
return new cTimerFunctor0<TCLASS>(c,fp,TimeoutMs,runOnce);
}
template<class TCLASS, class TARG1>
cTimerEvent *CreateTimerEvent(TCLASS *c, void (TCLASS::*fp)(TARG1),
TARG1 arg1,
unsigned int TimeoutMs, bool runOnce = true)
{
return new cTimerFunctor1<TCLASS,TARG1>(c,fp,arg1,TimeoutMs,runOnce);
}
template<class TCLASS>
void CancelTimerEvents(TCLASS *c)
{
cTimerEvent::CancelAll((void*)c);
}
// usage:
//
// 'this' derived from cTimerHandler:
// Set timer:
// cTimerCallback::Set(this, TimeoutMs);
// Cancel timer:
// - return false from handler or
// - call cTimerCallback::Cancel(this); or
// - delete 'this' object
//
// any function of any class:
// Set timer:
// - cTimerEvent *event = CreateTimerEvent(...);
// example:
// CreateTimerEvent(this, &cXinelibDevice::TimerEvent, 1, 1000);
// -> calls this->cXinelibDevice::TimerEvent(1) every second until stopped.
// Cancel timer:
// - if handler returns bool: return false from handler
// - handler is type of void: timer runs only once
// - call cTimerEvent::Cancel(event)
// Cancel all timers for object:
// - Call CancelTimerEvents(object)
// - Call CancelTimerEvents(this)
#endif // __XINELIBOUTPUT_TIMER_H
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