复制代码 代码如下:

/// <summary>共享锁</summary>

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); } }

/// <summary>释放所有锁</summary>

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); }

}

}