XrdXrootdFileLock1 Class Reference

#include <XrdXrootdFileLock1.hh>

Inheritance diagram for XrdXrootdFileLock1:

Collaboration diagram for XrdXrootdFileLock1:

Public Member Functions
	XrdXrootdFileLock1 ()
	~XrdXrootdFileLock1 ()
int	Lock (const char *path, char mode, bool force)
void	numLocks (const char *path, int &rcnt, int &wcnt)
int	Unlock (const char *path, char mode)

Detailed Description

Definition at line 38 of file XrdXrootdFileLock1.hh.

Constructor & Destructor Documentation

XrdXrootdFileLock1()

XrdXrootdFileLock1::XrdXrootdFileLock1 ( )

inline

Definition at line 48 of file XrdXrootdFileLock1.hh.

{}

~XrdXrootdFileLock1()

XrdXrootdFileLock1::~XrdXrootdFileLock1 ( )

inline

Definition at line 49 of file XrdXrootdFileLock1.hh.

{} // This object is never destroyed!

Member Function Documentation

Lock()

int XrdXrootdFileLock1::Lock ( const char * path, char mode, bool force )

virtual

Implements XrdXrootdFileLock.

Definition at line 80 of file XrdXrootdFileLock1.cc.

{
   XrdXrootdLockFileLock locker(&LTMutex);
   XrdXrootdFileLockInfo *lp;
 
// See if we already have a lock on this file
//
   if ((lp = XrdXrootdLockTable.Find(path)))
      {if (mode == 'r')
          {if (lp->numWriters && !force)
              return -lp->numWriters;
           lp->numReaders++;
          } else {
           if ((lp->numReaders || lp->numWriters) && !force)
              return (lp->numWriters ? -lp->numWriters : lp->numReaders);
           lp->numWriters++;
          }
       return 0;
      }
 
// Item does not exist, add it to the table
//
   XrdXrootdLockTable.Add(path, new XrdXrootdFileLockInfo(mode));
   return 0;
}

References XrdXrootdFileLockInfo::numReaders, XrdXrootdFileLockInfo::numWriters, and XrdXrootdLockTable.

numLocks()

void XrdXrootdFileLock1::numLocks ( const char * path, int & rcnt, int & wcnt )

virtual

Implements XrdXrootdFileLock.

Definition at line 112 of file XrdXrootdFileLock1.cc.

{
   XrdXrootdLockFileLock locker(&LTMutex);
   XrdXrootdFileLockInfo *lp;
 
   if (!(lp = XrdXrootdLockTable.Find(path))) rcnt = wcnt = 0;
      else {rcnt = lp->numReaders; wcnt = lp->numWriters;}
}

References XrdXrootdFileLockInfo::numReaders, XrdXrootdFileLockInfo::numWriters, and XrdXrootdLockTable.

Unlock()

int XrdXrootdFileLock1::Unlock ( const char * path, char mode )

virtual

Implements XrdXrootdFileLock.

Definition at line 125 of file XrdXrootdFileLock1.cc.

{
   XrdXrootdLockFileLock locker(&LTMutex);
   XrdXrootdFileLockInfo *lp;
 
// See if we already have a lock on this file
//
   if (!(lp = XrdXrootdLockTable.Find(path))) return 1;
 
// Adjust the lock information
//
   if (mode == 'r')
      {if (lp->numReaders == 0) return 1;
       lp->numReaders--;
      } else {
       if (lp->numWriters == 0) return 1;
       lp->numWriters--;
      }
 
// Delete the entry if we no longer need it
//
   if (lp->numReaders == 0 && lp->numWriters == 0)
      XrdXrootdLockTable.Del(path);
   return 0;
}

References XrdXrootdFileLockInfo::numReaders, XrdXrootdFileLockInfo::numWriters, and XrdXrootdLockTable.

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

• XrdXrootdFileLock1.hh
• XrdXrootdFileLock1.cc