Date: Sat, 28 Jun 2003 02:55:03 -0700 (PDT) From: David Xu <davidxu@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/libpthread pthread.mapsrc/lib/libpthread/support thr_support.c src/lib/libpthread/thread thr_info.c thr_init.c thr_kern.c thr_kill.c thr_private.h thr_sig.c thr_sigaction.c... Message-ID: <200306280955.h5S9t3sI062019@repoman.freebsd.org>
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davidxu 2003/06/28 02:55:02 PDT
FreeBSD src repository
Modified files:
lib/libpthread pthread.map
lib/libpthread/support thr_support.c
lib/libpthread/thread thr_info.c thr_init.c thr_kern.c
thr_kill.c thr_private.h thr_sig.c
thr_sigaction.c thr_sigmask.c
thr_sigpending.c thr_sigprocmask.c
thr_sigsuspend.c thr_sigwait.c
Log:
o Use a daemon thread to monitor signal events in kernel, if pending
signals were changed in kernel, it will retrieve the pending set and
try to find a thread to dispatch the signal. The dispatching process
can be rolled back if the signal is no longer in kernel.
o Create two functions _thr_signal_init() and _thr_signal_deinit(),
all signal action settings are retrieved from kernel when threading
mode is turned on, after a fork(), child process will reset them to
user settings by calling _thr_signal_deinit(). when threading mode
is not turned on, all signal operations are direct past to kernel.
o When a thread generated a synchoronous signals and its context returned
from completed list, UTS will retrieve the signal from its mailbox and try
to deliver the signal to thread.
o Context signal mask is now only used when delivering signals, thread's
current signal mask is always the one in pthread structure.
o Remove have_signals field in pthread structure, replace it with
psf_valid in pthread_signal_frame. when psf_valid is true, in context
switch time, thread will backout itself from some mutex/condition
internal queues, then begin to process signals. when a thread is not
at blocked state and running, check_pending indicates there are signals
for the thread, after preempted and then resumed time, UTS will try to
deliver signals to the thread.
o At signal delivering time, not only pending signals in thread will be
scanned, process's pending signals will be scanned too.
o Change sigwait code a bit, remove field sigwait in pthread_wait_data,
replace it with oldsigmask in pthread structure, when a thread calls
sigwait(), its current signal mask is backuped to oldsigmask, and waitset
is copied to its signal mask and when the thread gets a signal in the
waitset range, its current signal mask is restored from oldsigmask,
these are done in atomic fashion.
o Two additional POSIX APIs are implemented, sigwaitinfo() and sigtimedwait().
o Signal code locking is better than previous, there is fewer race conditions.
o Temporary disable most of code in _kse_single_thread as it is not safe
after fork().
Revision Changes Path
1.2 +4 -0 src/lib/libpthread/pthread.map
1.3 +3 -0 src/lib/libpthread/support/thr_support.c
1.24 +16 -1 src/lib/libpthread/thread/thr_info.c
1.56 +4 -39 src/lib/libpthread/thread/thr_init.c
1.72 +138 -96 src/lib/libpthread/thread/thr_kern.c
1.16 +1 -1 src/lib/libpthread/thread/thr_kill.c
1.91 +19 -14 src/lib/libpthread/thread/thr_private.h
1.56 +443 -345 src/lib/libpthread/thread/thr_sig.c
1.19 +10 -3 src/lib/libpthread/thread/thr_sigaction.c
1.14 +11 -14 src/lib/libpthread/thread/thr_sigmask.c
1.13 +6 -1 src/lib/libpthread/thread/thr_sigpending.c
1.16 +3 -2 src/lib/libpthread/thread/thr_sigprocmask.c
1.19 +15 -4 src/lib/libpthread/thread/thr_sigsuspend.c
1.26 +143 -69 src/lib/libpthread/thread/thr_sigwait.c
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