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copied!<p>What you need here are condition variables. I don't know specifically for .NET but in general you will have something like this</p> <pre><code>Condition cond; Mutex lock; public Cancel() { lock.lock() _cancelled = true; cond.signal(lock); lock.unlock(); } public Weight Resolve(){ _cancelled = false; lock.lock(); while(_source.CurrentWeight < threshold) { if(_cancelled) { lock.unlock(); throw new CancelledOperationException(); } cond.timedWait(lock, 100); // Wait until one of the above conditions is met } lock.unlock(); return _source.CurrentWeight } </code></pre> <p>even better would be if your WeightResolver signalled on the same condition when the weight changed. e.g.</p> <pre><code>Condition cond; Mutex lock; public Cancel() { lock.lock() _cancelled = true; cond.signal(lock); lock.unlock(); } public Weight Resolve(){ _cancelled = false; lock.lock(); while(_source.CurrentWeight < threshold) { if(_cancelled) { lock.unlock(); throw new CancelledOperationException(); } cond.wait(lock); // Wait until one of the above conditions is met } lock.unlock(); return _source.CurrentWeight } </code></pre> <p>and in the WeightMonitor Class, you had something like this.</p> <pre><code>public void updateWeight() { lock.lock(); ...update weight; cond.signal(lock); lock.unlock(); } </code></pre> <p>where the Conditionvariable and lock are the same. in both classes.</p> <p>This is a pretty standard use for condition variables, this is also how join is generally implemented.</p>

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