XrdSutFileLocker Class Reference

#include <XrdSutAux.hh>

Collaboration diagram for XrdSutFileLocker:

Public Types
enum	ELockType {   kShared = 0 ,   kExcl = 1 }

Public Member Functions
	XrdSutFileLocker (int fd, ELockType lock)
	~XrdSutFileLocker ()
bool	IsValid () const

Detailed Description

Definition at line 238 of file XrdSutAux.hh.

Member Enumeration Documentation

ELockType

enum XrdSutFileLocker::ELockType

Enumerator
kShared
kExcl

Definition at line 243 of file XrdSutAux.hh.

{ kShared = 0, kExcl = 1 };

Constructor & Destructor Documentation

XrdSutFileLocker()

XrdSutFileLocker::XrdSutFileLocker	(	int	fd,
		ELockType	lock
	)

Definition at line 615 of file XrdSutAux.cc.

{
   // Constructor: locks the file in 'lock' mode.
   // Use IsValid() to test success.
 
   valid = 0;
   fdesk = fd;
 
   // Exclusive lock of the whole file
   int lockmode = (lock == XrdSutFileLocker::kExcl) ? (F_WRLCK | F_RDLCK)
                                                    :  F_RDLCK;
   struct flock flck;
   memset(&flck, 0, sizeof(flck));
   flck.l_type   = lockmode;
   flck.l_whence = SEEK_SET;
   if (fcntl(fdesk, F_SETLK, &flck) != 0)
      // Failure
      return;
 
   // Success
   valid = 1;
}

References kExcl.

~XrdSutFileLocker()

XrdSutFileLocker::~XrdSutFileLocker

(

)

Definition at line 638 of file XrdSutAux.cc.

{
   // Destructor: unlocks the file if locked.
 
   if (fdesk < 0 || !IsValid())
      return;
   //
   // Unlock the file
   struct flock flck = {F_UNLCK, SEEK_SET, 0, 0, 0};
   memset(&flck, 0, sizeof(flck));
   flck.l_type   = F_UNLCK;
   flck.l_whence = SEEK_SET;
   fcntl(fdesk, F_SETLK, &flck);
}

References IsValid().

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Member Function Documentation

IsValid()

bool XrdSutFileLocker::IsValid ( ) const

inline

Definition at line 246 of file XrdSutAux.hh.

{ return valid; }

Referenced by ~XrdSutFileLocker(), and XrdCryptosslX509ChainToFile().

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

• XrdSutAux.hh
• XrdSutAux.cc