public static ResultType GetWriteLock <ResultType>(ReaderWriterLock lockObj, int timeout, DoWorkFunc <ResultType> doWork)
{
RWLockStatus status = (lockObj.IsWriterLockHeld ? RWLockStatus.WRITE_LOCK : (lockObj.IsReaderLockHeld ? RWLockStatus.READ_LOCK : RWLockStatus.UNLOCKED));
LockCookie writeLock = default(LockCookie);
if (status == RWLockStatus.READ_LOCK)
{
writeLock = lockObj.UpgradeToWriterLock(timeout);
}
else if (status == RWLockStatus.UNLOCKED)
{
lockObj.AcquireWriterLock(timeout);
}
try {
return(doWork());
} finally {
if (status == RWLockStatus.READ_LOCK)
{
lockObj.DowngradeFromWriterLock(ref writeLock);
}
else if (status == RWLockStatus.UNLOCKED)
{
lockObj.ReleaseWriterLock();
}
}
}
public RWLock(ReaderWriterLock lockObj, RWLockStatus status, int timeoutMS)
{
this.lockObj = lockObj;
this.timeout = timeoutMS;
this.Status = status;
}