RWTLockGuard<Resource>

RWTLockGuard<Resource>  RWTLockGuardBase<Resource>

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• Header File
• Description
• Example
• Public Typedef
• Constructor
• Protected Constructor
• Protected Member Operator
• See Also

Data Types

ResourceType

Member Functions

operator=()

Synchronization

#include <rw/sync/RWTLockGuard.h> 

RWTLockGuard<Resource> is a guard class that acquires its resource upon creation and releases 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 acquire a mutex upon creation and release it when destructed. The class used as the actual template parameter for Resource must be one that provides acquire and release methods, such as provided by the Threads.h++ synchronization classes.

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

// ...
RWMutexLock mutex;

void foo()
{  
   RWTLockGuard<RWMutexLock> lock(mutex);  // acquires mutex
   
   // ... critical section

   // Mutex will be released in RWTLockGuard destructor 
   // before leaving scope, especially important if an exception
   // might be thrown!
}

typedef Resource     ResourceType;

RWTLockGuard(Resource& resource);

Constructs an instance with the given resource and acquires that resource. (The resource will be released in the destructor of the base class.)

RWTLockGuard(const RWTLockGuard<Resource>& second);

Copy constructor is protected to disallow copy construction.

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

Assignment operator is protected to disallow assignment.

RWTTryLockGuard, RWTUnlockGuard

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