共享锁using范围的实现方法

复制代码 代码如下:
///

共享锁

public class ShareLock
{
    ReaderWriterLock Lock;
    IDisposable readLock, writeLock;

    public IDisposable ReadLock { get { Lock.AcquireReaderLock(-1); return readLock; } }
    public IDisposable WriteLock { get { Lock.AcquireWriterLock(-1); return writeLock; } }
    public IDisposable UpgradeLock { get { return new UpgraderLocked(Lock); } }
    ///

释放所有锁

    public void ReleaseLock() { Lock.ReleaseLock(); }

    public ShareLock()
    {
        this.Lock = new ReaderWriterLock();
        this.readLock = new Locked(Lock.ReleaseReaderLock);
        this.writeLock = new Locked(Lock.ReleaseWriterLock);
    }
    class Locked : IDisposable
    {
        ThreadStart ReleaseLock;
        public Locked(ThreadStart ReleaseLock) { this.ReleaseLock = ReleaseLock; }
        public void Dispose() { this.ReleaseLock(); }
    }
    class UpgraderLocked : IDisposable
    {
        delegate void ReleaseLockHandler(ref Lockcookie lockcookie);

        ReleaseLockHandler ReleaseLock;
        Lockcookie cookie;
        public UpgraderLocked(ReaderWriterLock locker)
        {
            cookie = locker.UpgradeToWriterLock(-1);
            this.ReleaseLock = locker.DowngradeFromWriterLock;
        }
        public void Dispose() { this.ReleaseLock(ref cookie); }
    }
}