XrdObjectQ< T > Class Template Reference

#include <XrdObject.hh>

Inheritance diagram for XrdObjectQ< T >:

Collaboration diagram for XrdObjectQ< T >:

Public Member Functions
	XrdObjectQ (const char *id, const char *desc)
	~XrdObjectQ ()
void	DoIt ()
T *	Pop ()
void	Push (XrdObject< T > *Node)
void	Set (int inQMax, time_t agemax=1800)
void	Set (XrdScheduler *sp, XrdSysTrace *tp, int TraceChk=0)
Public Member Functions inherited from XrdJob
	XrdJob (const char *desc="")
virtual	~XrdJob ()

Additional Inherited Members
Public Attributes inherited from XrdJob
const char *	Comment
XrdJob *	NextJob

Detailed Description

template<class T>
class XrdObjectQ< T >

Definition at line 89 of file XrdObject.hh.

Constructor & Destructor Documentation

XrdObjectQ()

template<class T>

XrdObjectQ< T >::XrdObjectQ ( const char * id, const char * desc )

inline

Definition at line 119 of file XrdObject.hh.

                                                    : XrdJob(desc)
                  {Curage = Count = 0; Maxage = 0; TraceID = id;
                   MaxinQ = 32; MininQ = 16; First = 0;
                  }

References XrdJob::XrdJob().

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~XrdObjectQ()

template<class T>

XrdObjectQ< T >::~XrdObjectQ ( )

inline

Definition at line 124 of file XrdObject.hh.

{}

Member Function Documentation

DoIt()

template<class T>

void XrdObjectQ< T >::DoIt ( )

virtual

Implements XrdJob.

Definition at line 38 of file XrdObject.icc.

{
   XrdObject<T> *pp, *p;
   int oldcnt, agemax;
 
// Lock the anchor and see if we met the threshold for deletion
//
   QMutex.Lock();
   agemax = Maxage;
   if ((oldcnt = Count) > MininQ)
      {
      // Prepare to scan down the queue.
      //
      if ((pp = First)) p = pp->Next;
         else p = 0;
 
      // Find the first object that's been idle for too long
      //
      while(p && (p->QTime >= Curage)) {pp = p; p = p->Next;}
 
      // Now delete half of the idle objects. The object queue element must be
      // part of the actual object being deleted for this to properly work.
      //
      if (pp) while(p)
                   {pp->Next = p->Next; delete p->Item;
                    Count--;
                    p = ((pp = pp->Next) ? pp->Next : 0);
                   }
      }
 
// Increase the age and unlock the queue
//
   Curage++;
   QMutex.UnLock();
 
// Trace as needed
//
   if (TraceON && Trace->Tracing(TraceON))
      {SYSTRACE(Trace->, 0, TraceID, 0,
                Comment <<" trim done; " <<Count <<" of " <<oldcnt <<" kept");
      }
 
// Reschedule ourselves if we must do so
//
   if (agemax > 0) Sched->Schedule((XrdJob *)this, agemax+time(0));
 }

References XrdJob::XrdJob(), XrdJob::Comment, and SYSTRACE.

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Pop()

template<class T>

T * XrdObjectQ< T >::Pop ( )

inline

Definition at line 93 of file XrdObject.hh.

                     {XrdObject<T> *Node;
                      QMutex.Lock();
                      if ((Node = First)) {First = First->Next; Count--;}
                      QMutex.UnLock();
                      if (Node) return Node->Item;
                      return (T *)0;
                     }

Push()

template<class T>

void XrdObjectQ< T >::Push ( XrdObject< T > * Node )

inline

Definition at line 101 of file XrdObject.hh.

                     {Node->QTime = Curage;
                      QMutex.Lock();
                      if (Count >= MaxinQ) delete Node->Item;
                         else {Node->Next = First;
                               First = Node;
                               Count++;
                              }
                      QMutex.UnLock();
                     }

Set() [1/2]

template<class T>

void XrdObjectQ< T >::Set	(	int	inQMax,
		time_t	agemax = 1800 )

Definition at line 90 of file XrdObject.icc.

{
 
// Lock the data area and set the values
//
   QMutex.Lock();
   MaxinQ = inQMax; Maxage = agemax;
   if (!(MininQ = inQMax/2)) MininQ = 1;
   QMutex.UnLock();
 
// Schedule ourselves using the new values
//
   if (agemax > 0) Sched->Schedule((XrdJob *)this, agemax+time(0));
}

References XrdJob::XrdJob().

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Set() [2/2]

template<class T>

void XrdObjectQ< T >::Set ( XrdScheduler * sp, XrdSysTrace * tp, int TraceChk = 0 )

inline

Definition at line 114 of file XrdObject.hh.

                      {Sched = sp; Trace = tp; TraceON = TraceChk;}

References XrdJob::XrdScheduler.

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The documentation for this class was generated from the following files:

• XrdObject.hh
• XrdObject.icc