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PODeclarative thread safety in .NET
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copied!<p>I need to make an existing app thread safe. Due circumstances (see below), I decided to use one single ReaderWriterLock for the entire graph of business objects. All methods/properties must look like these:</p> <pre><code>public int MyReadOperation(string inputParam) { rwLock.AcquireReaderLock(10000); try { // do all read operations ... } finally { rwLock.ReleaseReaderLock(); } } public void MyWriteOperation(string input) { rwLock.AcquireWriterLock(10000); try { // do all write operations ... } finally { rwLock.ReleaseWriterLock(); } } </code></pre> <p>But I have immense amount of methods to cover and I am freaked out from the idea of copy/pasting. Inspired by MethodImplAttribute, I would prefer to have a code like this while behave as the code above:</p> <pre><code>[ReadOperation] public int MyReadOperation(string inputParam) { // do all read operations ... } [WriteOperation] public void MyWriteOperation(string input) { // do all write operations ... } </code></pre> <p>Is there a way to interrupt Thread execution before/after entering into a property or a method and adding the thread-safety precautions? Or somehow utilizing the functional language features of C#, embedding the productive body of the methods into a generic ReaderWriterLock aquiring "frame"?</p> <p>A bit of background:</p> <p>I am working on a project where data carrier business objects are exposed via .NET Remoting. However, these data classes are not serializable but MarshalByRef-s. That means that ALL clients actually read/write the very same business objects. This cannot be changed, it is carved in stone. The hope for thread-safety is that these remoted business objects are read-only in the eyes of the remoting clients (thought they do loop many lists) and all write operations are nicely separated into a dedicated facade. I expect rare writes and frequent reads. The business objects are highly connected, they are very "graphy".</p>

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