ACS::ThreadSyncGuard

ACS::ThreadSyncGuard −

Class implementing scope locking synchronization pattern.

#include <acsThreadBase.h>

Public Member Functions

ThreadSyncGuard (ACE_Recursive_Thread_Mutex *mutex, bool block=true)

~ThreadSyncGuard ()

void acquire ()

void release ()

Public Attributes

ACE_Recursive_Thread_Mutex * mutex_mp

mutex used by guard

bool acquired_m

state of mutex

Class implementing scope locking synchronization pattern.

ThreadSyncGuard implements scope locking synchronization pattern, which is very usefull not to forget to release (or relase can be by-passed by an exception) and so avoiding deadlocks. Mutex is automatically released when out of scope.
ThreadSyncGuard uses recursive thread mutex. An example of usage:

      void PowerSupplyImpl::shutdown()
      {

//ThreadSyncGuard guard(’gizmo0::propertyVector’);

ThreadSyncGuard guard(mutex_m);

          // do something

          // optional lock release

          // do something

          // optional locking

          // do something

          // lock is automatically released when out of scope

      }

ACS::ThreadSyncGuard::ThreadSyncGuard (ACE_Recursive_Thread_Mutex * mutex, bool block = true) Constructor. Creates a guard and acquires mutex if <block> is true.

Parameters:

mutex mutex to be used by guard
block if true, lock is acuired, otherwise not

ACS::ThreadSyncGuard::~ThreadSyncGuard () Destructor. Relases mutex if necessary.

void ACS::ThreadSyncGuard::acquire () Blocks the thread until the lock is acquired.

void ACS::ThreadSyncGuard::release () Releases the lock.

bool ACS::ThreadSyncGuard::acquired_m

state of mutex

ACE_Recursive_Thread_Mutex* ACS::ThreadSyncGuard::mutex_mp

mutex used by guard

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