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"look good" tedu@
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signal is already pending in the calling thread or the main thread
and there's no longer a race condition where the signal could be
diverted but sigwait() would still block. There were some off-by-one
errors too.
(The checking of the main thread's pending list is just until a
pending list for the process can be added to struct process. For
now, such signals end up as pending on the main thread.)
oks tedu@ and art@
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instead of crashing
ok kurt@
first observed by Jung <moorang at gmail.com>
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unblocks the pthread_join() for this thread until the exiting thread is
completely done with its thread structure, as the joining thread will
free it once unblocked. Also, don't bother to call _sem_post() if the
thread is detached.
ok kurt@
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structure, as the 'tid' member there is used by other parts of
librthread to determine whether the current thread is the initial thread
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Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code that NetBSD has claimed for itself without attributing to the
actual authors.
OK deraadt@
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- Make an effort to protect important libc and ld.so critical areas during
the fork(2)/vfork(2) sys call.
- Add pthread_atfork(3) implementation based on Daniel Eischen's code.
Original diff by Philip Guenther <guenther at gmail.com> with some
additions and refinements by me. Positive test report from brad@ with
many kde apps. fork(2) and pthread_atfork(3) pthread regresses pass.
okay tedu@, kettenis@, marc@
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sigprocmask(2) in threaded programs.
From Philip Guenther <guenther at sendmail.com> via PR library/5795.
okay marc@
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_thread_atexit_unlock(). okay tedu@
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instead of the generic pthread macros since free(3) uses __arc4_getbyte()
when freeing small sized allocations and the generic pthread macros call
malloc(3).
- eliminate passing pointers to a static variable with global scope (rs)
for additional code clarity and reduction.
- shlib minor bumps for libc and libpthread due to new functions.
From andreas@ with some bits from me. okay tedu@ marc@ w/some spot
checking from millert@
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pthread_stackseg_np(). With input and okay marc@
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isolate its usage to libpthread only and replace with generic non-static
mutex support in the one place it is needed:
- remove _FD_LOCK/UNLOCK from lseek and ftruncate in libc and make the
functions weak so that libpthread can override with its own new
versions that do the locking.
- remove _thread_fd_lock/unlock() weak functions from libc and adjust
libpthread for the change.
- add generic _thread_mutex_lock/unlock/destroy() weak functions in libc
to support non-static mutexes in libc and add libpthread and librthread
implementations for them. libc can utilize non-static mutexes via the
new _MUTEX_LOCK/UNLOCK/DESTROY() macros. Actually these new macros can
support both static and non-static mutexes but currently only using
them for non-static.
- make opendir/closedir/readdir/readdir_r/seekdir/telldir() thread-safe
for both thread libraries by using a non-static mutex in the struct
_dirdesc (typedef DIR), utilizing it in the *dir functions and remove
remaining and incorrect _FD_LOCK/UNLOCK() use in libc.
- add comments to both thread libraries to indicate libc depends on the
current implementation of static mutex initialization. suggested by
marc@
- major bump libc and libpthread due to function removal, structure
change and weak symbol conversions.
okay marc@, tedu@
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drahn@ ok (long time ago)
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pthreads header changed, char * -> const char *
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can be set in the environment using RTHREAD_DEBUG.
ok, tedu@
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didn't like it.
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prototype for _atomic_lock
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with ourself and only free thread after a succesful join. ok marc@
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ok drahn@
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and check user stack for proper alignment. ok tedu@ marc@
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Minor tweaks to compile with the above, primarily in fixing
the conflicts between semaphore.h and rthread.h
"i like the additional warnings" tedu@
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not use a separate reaper thread. ok tedu@ marc@
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do not allow a join to a detached thread
"it looks good" otto@
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size (and guard zone size) to be set using pthread_attr. Guard
zones are specified in bytes, but implemented in terms of a
page size.
OK Otto@
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ok tedu@ marc@
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_rthread_debug(3, "foo = %s", foo);
where output is to stderr and will only be printed if the current
debug level is >= 3. Messages with a debug level of 0 are always
printed. The level can be set from the environment (not enabled yet)
or with gdb by modifying variable _rthread_debug_level.
"Fine with me" -Otto
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be fully saved in resisters, if left on the parents stack, it could be
overwritten before the child runs. pointed out by miod.
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ok otto@
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With this, java seems to be operational. Also make threads_ready
non-static, which is needed for an upcoming diff. ok tedu@
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and fix a bug in thread creation error path. ok tedu@
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will make the right thing happen. verified by kettenis and drahn
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update for new thrwakeup that takes a count argument
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pthread_stackseg_np(), from existing pthread lib.
discussed with tedu@ ok marc@
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