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Use .Rv where possible. Some manual pages claimed that the error "is
returned", but RTFS and some quick testing indicate that this is wrong.
The commit message from 2003 says that:
Note our current implementation mis-matches [man pages] slightly
(error codes are stuffed into errno, where they should simply be
returned by these calls). This will be addressed shortly.
That hasn't happened in the 20 years, so we might as well make the man
pages reflect the reality.
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if it is a relative timestamp, as discussed in tech-kern.
XXX: pullup-8
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hint pointer, but do so in a way that remains compatible with older
pthread libraries. This can be used to wake another thread before the
calling thread goes asleep, saving at least one syscall + involuntary
context switch. This turns out to be a fairly large win on the condvar
benchmarks that I have tried.
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- Fix date.
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