On Wed, 2003-02-05 at 18:09, Trey Jackson wrote:
> template<class LockingStrategy>
> class mySuperLockedClass : public LockingStrategy
> {
> public:
> void read()
> {
> LockingStrategy::readlock();
> // do stuff
> }
> void write()
> {
> LockingStrategy::writelock();
> // do stuff
> }
> };
>
...
> struct
> MutexLockingStrategy
> {
> boost::mutex m_;
> void readlock()
> {
> boost::mutex::scoped_lock l(m_);
> }
> void writelock()
> {
> boost::mutex::scoped_lock l(m_);
> }
> };
>
These scoped locks will go out of scope before you "do stuff".
You can extend the scope using something like...
template<class LockingStrategy>
class mySuperLockedClass : public LockingStrategy
{
public:
void read()
{
typename LockingStrategy::read_lock_type l( this );
// do stuff
}
void write()
{
typename LockingStrategy::write_lock_type l( this );
// do stuff
}
};
struct
MutexLockingStrategy
{
boost::mutex m_;
class read_lock_type
{
public:
readlock_type( MutexLockingStrategy * s ) : l_( s->m_ )
private:
boost::mutex::scoped_lock l_;
}
class write_lock_type
{
public:
writelock_type( MutexLockingStrategy * s ) : l_( s->m_ )
private:
boost::mutex::scoped_lock l_;
}
};
// etc.
--
Hamish Mackenzie <[EMAIL PROTECTED]>
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