SbThreadAutoReadLock Class Reference
[Threads]

Provides reliable unlocking of a read-only mutex. More...

#include <Inventor/threads/SbThreadAutoLock.h>

List of all members.

Public Member Functions
	SbThreadAutoReadLock (SbThreadRWMutex *mutex)
	SbThreadAutoReadLock (SbThreadRWMutex &mutex)
int	unlock ()
int	relock ()

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Detailed Description

Provides reliable unlocking of a read-only mutex.

This class provides reliable unlocking of a read-only mutex.

An SbThreadRWMutex object must be created separately. The address of the mutex object is passed to the constructor, which locks the mutex and saves a reference to the mutex object. The autolock object should be created on the stack, so each thread will have its own autolock. The destructor automatically unlocks the mutex.

Because the autolock object is created on the stack, it avoids the need to explicitly unlock the mutex at every point of exit from the function (a common source of errors). The mutex will be unlocked when the autolock goes out of scope.

The unlock() and relock() methods are provided for complex cases where the lock needs to be temporarily released. If the autolock is explicitly unlocked, the destructor does nothing.

Example:

      myClass contains an RWMutex object named m_mutex
      void myClass::someFunction()
      {
         SbThreadAutoReadLock( m_mutex );
         ... other code ...
      } // mutex automatically unlocked

SEE ALSO

SbThread, SbThreadAutoLock, SbThreadAutoWriteLock, SbThreadBarrier, SbThreadMutex, SbThreadRWMutex

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Constructor & Destructor Documentation

SbThreadAutoReadLock::SbThreadAutoReadLock

(

SbThreadRWMutex *

mutex

)

Creates a mutex "autolock" object and automatically calls the mutex readlock method.

The mutex will be automatically unlocked when the autolock object is destroyed.

SbThreadAutoReadLock::SbThreadAutoReadLock

(

SbThreadRWMutex &

mutex

)

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Member Function Documentation

int SbThreadAutoReadLock::relock

(

)

Explicitly relock the associated mutex.

Do not unlock or lock the mutex directly.

int SbThreadAutoReadLock::unlock

(

)

Explicitly unlock the associated mutex.

Do not unlock or lock the mutex directly.

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

• Inventor/threads/SbThreadAutoLock.h