On Mon, 4 Feb 2008, Dag-Erling Smørgrav wrote:
Dag-Erling Smorgrav <[EMAIL PROTECTED]> writes:
Log:
Add pthread_mutex_islocked_np(), a cheap way to verify that a mutex is
locked. This is intended primarily to support the userland equivalent
of the various *_ASSERT_LOCKED() macros we have in the kernel.
I'm having second thoughts about this one. There is a significant risk
of false positives if the mutex is currently locked by another thread.
I'm wondering whether to a) change the implementation so it only returns
true if the mutex is owned by the current thread, or b) change the
interface so you can specify a specific thread, or NULL for "any".
I thought you wanted to know if it was locked regardless of who
locked it. If you want to know if the current thread has it
locked, it should be called pthread_mutex_isowned_np().
I don't really see the utility in any other behavior, and almost
question the need for _isowned. I wonder if all the _np() functions
should be in the FBSDprivate namespace...
--
DE
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