XrdOucCallBack Class Reference

#include <XrdOucCallBack.hh>

Inheritance diagram for XrdOucCallBack:

Collaboration diagram for XrdOucCallBack:

Public Member Functions
	XrdOucCallBack ()
	~XrdOucCallBack ()
void	Cancel ()
int	Init (XrdOucErrInfo *eInfo)
int	Reply (int retVal, int eValue, const char *eText, const char *Path=0)
Public Member Functions inherited from XrdOucEICB
	XrdOucEICB ()
	Constructor and destructor.
virtual	~XrdOucEICB ()

Static Public Member Functions
static int	Allowed (XrdOucErrInfo *eInfo)

Public Attributes
XrdOucCallBack *	Next

Detailed Description

Definition at line 46 of file XrdOucCallBack.hh.

Constructor & Destructor Documentation

XrdOucCallBack()

XrdOucCallBack::XrdOucCallBack ( )

inline

Definition at line 95 of file XrdOucCallBack.hh.

: Next(0), cbSync(0), cbArg(0), cbObj(0) {}

~XrdOucCallBack()

XrdOucCallBack::~XrdOucCallBack ( )

inline

Definition at line 96 of file XrdOucCallBack.hh.

{if (cbObj) Cancel();}

References Cancel().

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Member Function Documentation

Allowed()

static int XrdOucCallBack::Allowed ( XrdOucErrInfo *  eInfo )

inlinestatic

Definition at line 57 of file XrdOucCallBack.hh.

{return eInfo->getErrCB() != 0;}

References XrdOucErrInfo::getErrCB().

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Cancel()

void XrdOucCallBack::Cancel

(

)

Definition at line 38 of file XrdOucCallBack.cc.

{
 
// If a callback is outstanding, send a reply indicating that the operation
// should be retried.
//
   if (cbObj) Reply(1, 0, "");
}

References Reply().

Referenced by ~XrdOucCallBack().

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Init()

int XrdOucCallBack::Init

(

XrdOucErrInfo *

eInfo

)

Definition at line 51 of file XrdOucCallBack.cc.

{
   const char *theUser;
 
 
// Make sure we can do a callback here
//
   if (cbObj || eInfo->getErrCB() == 0) return 0;
 
// Copy relevant data
//
   if ((theUser = eInfo->getErrUser())) strlcpy(UserID,theUser,sizeof(UserID));
      else strcpy(UserID, "???");
   cbObj = eInfo->getErrCB(cbArg);
 
// Now set the callback object in the input ErrInfo object to be ours so
// that we can make sure that the wait for callback response was sent
// before we actually effect a reply.
//
   eInfo->setErrCB(this, cbArg);
 
// All done
//
   return 1;
}

References XrdOucErrInfo::getErrCB(), XrdOucErrInfo::getErrUser(), XrdOucErrInfo::setErrCB(), and strlcpy().

Referenced by XrdOfsTPCInfo::SetCB().

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Reply()

int XrdOucCallBack::Reply	(	int	retVal,
		int	eValue,
		const char *	eText,
		const char *	Path = 0
	)

Definition at line 81 of file XrdOucCallBack.cc.

{
   XrdOucErrInfo cbInfo(UserID, this, cbArg);
   XrdOucEICB *objCB;
 
// Verify that we can actually do a callback
//
   if (!(objCB = cbObj)) return 0;
   cbObj = 0;
 
// Wait for the semaphore to make sure the "wait for callback" response was
// actually sent to preserve time causality.
//
   cbSync.Wait();
 
// Send the reply using the constructed ErrInfo object and then wait until we
// know that the response was actually sent to allow this object to be deleted.
//
   cbInfo.setErrInfo(eValue, (eText ? eText : ""));
   objCB->Done(retVal, &cbInfo, Path);
   cbSync.Wait();
 
// All done
//
   return 1;
}

References XrdOucEICB::Done(), Path, XrdOucErrInfo::setErrInfo(), and XrdSysSemaphore::Wait().

Referenced by Cancel(), and XrdOfsTPCInfo::Reply().

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Member Data Documentation

Next

XrdOucCallBack* XrdOucCallBack::Next

Definition at line 100 of file XrdOucCallBack.hh.

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

• XrdOucCallBack.hh
• XrdOucCallBack.cc