RWTUnlockGuard<Resource>

RWTUnlockGuard<Resource>  RWTGuardBase<Resource>

• Data Type and Member Function Indexes
• Package
• Header File
• Description
• Example
• Public Typedef
• Constructor
• Destructor
• Protected Constructor
• Protected Member Operator
• See Also

Data Types

ResourceType

Member Functions

operator=()

Synchronization

#include <rw/sync/RWTUnlockGuard.h> 

RWTUnlockGuard<Resource> is a guard class that releases its resource upon creation and acquires it upon destruction. Guard objects work in conjunction with block statements in such a way as to establish an appropriate state upon creation, maintain that state for the duration of the block, and restore the original state upon destruction. For example, a guard may release a mutex upon creation and reacquire it when destructed. The class used as the actual template parameter for Resource must be one that provides acquire and release methods such as the synchronization classes provided by the library.

#include <rw/sync/RWMutexLock.h>
#include <rw/sync/RWTUnlockGuard.h>


// ...
RWMutexLock mutex;

void foo()
{
   mutex.acquire();

   // ... critical code

   // temporarily release mutex for the duration of block:
   {  
      RWTUnlockGuard<RWMutexLock> lock(mutex); // releases mutex
   
      // ... anti-critical section

      // Mutex will be reacquired in RWTUnlockGuard destructor.
   }

   // ... more critical code

   mutex.release();
}

typedef Resource     ResourceType;

RWTUnlockGuard(Resource& resource);

Releases the resource.

~RWTUnlockGuard(void);

Reacquires the resource.

RWTUnlockGuard(const RWTUnlockGuard<Resource>& second);

Copy constructor is protected to disallow copy construction.

RWTUnlockGuard<Resource>&
operator=(const RWTUnlockGuard<Resource>& second);

Assignment operator is protected to disallow assignment.

RWTLockGuard<Resource>, RWTTryLockGuard<Resource>

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