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Is there a way to test if the current thread is holding a monitor lock on an object? I.e. an equivalent to the Thread.holdsLock in Java.
Thanks,
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You can check the lock on the particular object by calling wait() or notify() method on that object. If the object does not hold the lock, then it will throw llegalMonitorStateException . 2- By calling holdsLock(Object o) method. This will return the boolean value.
You can always call the static TryEnter method on the Monitor class using a value of 0 for the value to wait. If it is locked, then the call will return false.
The java. lang. Thread. holdsLock() method returns true if and only if the current thread holds the monitor lock on the specified object.
A thread that tries to acquire a lock that is held by another thread spins for a short while. While it spins, the thread continuously checks whether the lock it needs is still held by the other thread. This is the default behavior on multiple-CPU systems. Such a lock is called a thin lock.
I don't believe there is. There are grotty hack things you could do like calling Monitor.Wait(monitor, 0) and catching the SynchronizationLockException, but that's pretty horrible (and could theoretically "catch" a pulse that another thread was waiting for).
I suggest you try to redesign so that you don't need this, I'm afraid.
EDIT: In .NET 4.5, this is available with Monitor.IsEntered.
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The relevant information is stored by the SyncBlock structure used by the CLR and can be viewed during debugging with e.g. WinDbg + sos. To my knowledge there is no way to obtain the information from managed code, but it may be possible from unsafe code assuming you can somehow (and in a reliable manner) obtain a pointer to the relevant data used by the CLR.
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