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OSIncrementAtomic(), lck_mtx_lock() interoperability.

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OSIncrementAtomic(), lck_mtx_lock() interoperability.

Subject: OSIncrementAtomic(), lck_mtx_lock() interoperability.
From: Matt Darland <email@hidden>
Date: Wed, 15 Nov 2006 16:04:59 -0600

If I have an integer value X that is usually incremented through OSIncrementAtomic, but in occasional cases I'm holding a mutex (via lck_mtx_lock) to a structure that contains X, and I want to increment X: Can I just ++X while holding the mutex and avoid also having to call OSIncrementAtomic in those rare cases? i.e. Do OSxxxAtomic and lck_mtx_xxx enforce the same memory coherency with respect to an integer?

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Thanks,
Matt Darland
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