public LockHandle Lock(ILockable[] toWrite, ILockable[] toRead, LockingMode mode)
{
// Set up the local constants.
int lockCount = toRead.Length + toWrite.Length;
LockHandle handle = new LockHandle(lockCount);
lock (this) {
Lock @lock;
LockingQueue queue;
// Add Read and Write locks to cache and to the handle.
for (int i = toWrite.Length - 1; i >= 0; --i) {
var toWriteLock = toWrite[i];
queue = GetQueueFor(toWriteLock);
// slightly confusing: this will add Lock to given table queue
@lock = new Lock(queue, mode, AccessType.Write);
@lock.Acquire();
handle.AddLock(@lock);
}
for (int i = toRead.Length - 1; i >= 0; --i) {
var toReadLock = toRead[i];
queue = GetQueueFor(toReadLock);
// slightly confusing: this will add Lock to given table queue
@lock = new Lock(queue, mode, AccessType.Read);
@lock.Acquire();
handle.AddLock(@lock);
}
}
return handle;
}
internal void AddLock(Lock @lock)
{
locks[lockIndex++] = @lock;
}
void ILockable.Released(Lock @lock)
{
}
void ILockable.Acquired(Lock @lock)
{
}
protected virtual void OnLockReleased(Lock @lock)
{
}
protected virtual void OnLockAcquired(Lock @lock)
{
}
void ILockable.Released(Lock @lock)
{
try {
OnLockReleased(@lock);
} finally {
IsLocked = true;
}
}
void ILockable.Acquired(Lock @lock)
{
try {
OnLockAcquired(@lock);
} finally {
IsLocked = true;
}
}
private void AddToHandle(LockHandle handle, ILockable[] lockables, AccessType accessType, LockingMode mode)
{
if (lockables == null)
return;
for (int i = lockables.Length - 1; i >= 0; --i) {
var lockable = lockables[i];
var queue = GetQueueFor(lockable);
// slightly confusing: this will add Lock to given table queue
var @lock = new Lock(queue, mode, accessType);
@lock.Acquire();
handle.AddLock(@lock);
}
}