Lock Class Reference

#include <Lock.H>

Inheritance diagram for Lock:

Public Member Functions
	Lock ()
virtual	~Lock ()
LockId	lock_id () const

Protected Member Functions
void	lock ()
void	unlock ()

Static Protected Attributes
static LocksAr *	plocksar

Detailed Description

Lock is a base object for all kinds of locks made by a program. All locks that are made by program are registered and almost always will be unlocked at program's end. Handled circumstances include return from main(), doing exit() (but not _exit()!), aborting due to signal (except for SIGKILL(#9) and severe memory damage).

Application specific definition of the Lock-inherited objects is deriving new object type from Lock (see FileLock for example) and redefining constructor and destructor so that the first provides suitable lock technique and the last - unlock technique.

Lock as transaction brackets lives while Lock-inherited object exists. If some lock must exist only inside some (exception free!) program scope, it can be made as an automatic object. If one need lock with inter-function behavior, one must create instance of lock object in dynamic memory.

Constructor & Destructor Documentation

Lock::Lock

(

)

Doing lock here. While the object exists, corresponding resource is considered as locked. Never mind, in program, in system or in project scope.

virtual Lock::~Lock ( )

virtual

Destruction of the object is considered as unlinking it from manager and unlocking the resource.

Member Function Documentation

void Lock::lock ( )

protected

Doing lock here.

LockId Lock::lock_id

(

)

const

Returns identifier of the lock.

void Lock::unlock ( )

protected

Doing unlock here.

Member Data Documentation

LocksAr* Lock::plocksar

staticprotected

Global list of pointers at locks made by a program. Index of the lock is so-called LockId.

---

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

• /net/opt/univers/ubp-i-15.3-centos7-x64.urij/include/mix/Lock.H