Date: Mon, 2 Feb 2004 21:47:19 -0800 (PST) From: Daniel Eischen <deischen@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/libc/gen sem.c Message-ID: <200402030547.i135lKKc095786@repoman.freebsd.org>
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deischen 2004/02/02 21:47:19 PST
FreeBSD src repository
Modified files:
lib/libc/gen sem.c
Log:
Modify the implementation of libc semaphores so that they can be
overridden by the threads library to provide a userland version
of non-pshared semaphores and cancellation points. Also add
a sem_timedwait().
The libc version of semaphores always uses kernel semaphores
regardless of whether pshared is set or not. When threads are
not present, it is difficult to get sem_wait() or sem_timedwait()
to do the right thing (since pthread_cond_timedwait() and
pthread_cond_wait() are stubs in libc and just return immediately).
Revision Changes Path
1.8 +132 -146 src/lib/libc/gen/sem.c
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