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<p style="margin: 10px 0 0 0">I'll change the comment, but I think I may leave the lock - just as a way of slowing down the locking threads.</p>
<p style="margin: 10px 0 0 0">I thought hard about moving the uppdate of m_filestamp to after the refresh of the data</p>
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refresh loop:
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stat the file
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exit if the file hasn't changed since m_filestamp
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update from the file
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update m_filestamp (under a write lock)
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loop
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<p style="margin: 10px 0 0 0">while the other threads are going</p>
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lock
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stat the file
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kick the thread if file is more recent than filestamp
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<p style="margin: 10px 0 0 0">This will result in the thread being kick slightly more often. It is more obvious, but I cannot think of a situation in which it matters. if the filestamp has been moved forward but the load has completed then the fact that the locking thread kicks the reload thread is irrelevant since it will be using out of date data and the data is going to be updated anyway. If the file gets updates twice we are still OK because we state before we update.</p>
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