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* Added bool to the AutoLocker constructor indicating that the object

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has already been locked. Defaults to false, of course.
* `Abused' the AutoLocker for partition registration/unregistration
  (PartitionRegistrar).


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3631 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2003-06-23 23:42:15 +00:00
parent 966528dcbc
commit b8777f30dc
1 changed files with 28 additions and 6 deletions
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34
headers/private/kernel/disk_device_manager/KDiskDeviceUtils.h
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@ -88,18 +88,20 @@ class AutoLocker {
private:
typedef AutoLocker<Lockable, Locking> ThisClass;
public:
inline AutoLocker(Lockable *lockable)
inline AutoLocker(Lockable *lockable, bool alreadyLocked = false)
: fLockable(lockable),
fLocked(false)
fLocked(fLockable && alreadyLocked)
{
_Lock();
if (!fLocked)
_Lock();
}
inline AutoLocker(Lockable &lockable)
inline AutoLocker(Lockable &lockable, bool alreadyLocked = false)
: fLockable(&lockable),
fLocked(false)
fLocked(fLockable && alreadyLocked)
{
_Lock();
if (!fLocked)
_Lock();
}
inline ~AutoLocker()
@ -149,6 +151,7 @@ private:
// instantiations
class KDiskDevice;
class KDiskDeviceManager;
class KPartition;
typedef AutoLocker<KDiskDevice, AutoLockerReadLocking<KDiskDevice> >
DeviceReadLocker;
@ -156,6 +159,25 @@ typedef AutoLocker<KDiskDevice, AutoLockerWriteLocking<KDiskDevice> >
DeviceWriteLocker;
typedef AutoLocker<KDiskDeviceManager > ManagerLocker;
// AutoLockerPartitionRegistration
template<const int dummy = 0>
class AutoLockerPartitionRegistration {
public:
inline bool Lock(KPartition *partition)
{
partition->Register();
return true;
}
inline void Unlock(KPartition *partition)
{
partition->Unregister();
}
};
typedef AutoLocker<KPartition, AutoLockerPartitionRegistration<> >
PartitionRegistrar;
} // namespace DiskDevice
} // namespace BPrivate