This commit is contained in:
JoelKatz
2011-11-12 14:12:45 -08:00
parent 53b61d4d65
commit 2793311400

View File

@@ -6,46 +6,46 @@
// This is a returnable lock holder.
// I don't know why Boost doesn't provide a good way to do this.
class ScopedLock
class ScopedLock
{
private:
boost::mutex *mMutex; // parent object has greater scope, so guaranteed valid
mutable bool mValid;
ScopedLock(); // no implementation
public:
ScopedLock(boost::mutex &mutex) : mMutex(&mutex), mValid(true)
{
private:
boost::mutex *mMutex; // parent object has greater scope, so guaranteed valid
mutable bool mValid;
mMutex->lock();
}
ScopedLock(); // no implementation
public:
ScopedLock(boost::mutex &mutex) : mMutex(&mutex), mValid(true)
~ScopedLock()
{
if(mValid) mMutex->unlock();
}
ScopedLock(const ScopedLock &sl)
{
mMutex=sl.mMutex;
if(sl.mValid)
{
mMutex->lock();
}
~ScopedLock()
{
if(mValid) mMutex->unlock();
}
ScopedLock(const ScopedLock &sl)
{
mMutex=sl.mMutex;
if(sl.mValid)
{
mValid=true;
sl.mValid=false;
}
else mValid=false;
}
ScopedLock &operator=(const ScopedLock &sl)
{ // we inherit any lock the other class member had
if(mValid) mMutex->unlock();
mMutex=sl.mMutex;
if(sl.mValid)
{
mValid=true;
sl.mValid=false;
}
}
};
else mValid=false;
}
ScopedLock &operator=(const ScopedLock &sl)
{ // we inherit any lock the other class member had
if(mValid) mMutex->unlock();
mMutex=sl.mMutex;
if(sl.mValid)
{
mValid=true;
sl.mValid=false;
}
}
};
#endif