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* The second call to _thread_kern_sig_defer() in sem_post() should be a callJason Evans2000-08-231-1/+1
| | | | | | | to _thread_kern_sig_undefer(). Notes: svn path=/head/; revision=64991
* Fix an off-by-one error in the recursive mutex handling that made itAlfred Perlstein2000-08-131-3/+3
| | | | | | | | | | prematurely release recursive mutexes. Test case provided by: Bradley T. Hughes <bhughes@trolltech.com> Reviewed by: deischen Notes: svn path=/head/; revision=64574
* Add wrapper for kevent() syscallJonathan Lemon2000-08-073-2/+3
| | | | | | | Noted as missing by: nicolas.leonard@animaths.com Notes: svn path=/head/; revision=64346
* Make sem_post() safe to call from within a signal handler, as required byJason Evans2000-08-011-0/+7
| | | | | | | POSIX/SUSv2. Notes: svn path=/head/; revision=64111
* Call _thread_init() from pthread_once() if it has not already been called.Doug Rabson2000-07-211-0/+2
| | | | | | | | | | This fixes a segfault in some C++ programs which use exceptions before main() has been called (i.e. from global constructors). Reviewed by: deischen Notes: svn path=/head/; revision=63710
* Change my email address in the copyright notices for the sake of consistencyJason Evans2000-07-1810-10/+10
| | | | | | | (jasone@canonware.com --> jasone@freebsd.org). Notes: svn path=/head/; revision=63364
* Deal correctly with statically initialized condition variables inJason Evans2000-07-171-18/+17
| | | | | | | | | | | | pthread_cond_signal(), pthread_cond_broadcast(), and pthread_cond_timedwait(). Do not dump core in pthread_cond_timedwait() (due to a NULL pointer dereference) if attempting to wait on an uninitialized condition variable. PR: bin/18099 Notes: svn path=/head/; revision=63355
* If multiple threads are blocked in sigwait() for the same signal that doesJason Evans2000-06-273-4/+37
| | | | | | | | | | | | | | | | | | not have a user-supplied signal handler, when a signal is delivered, one thread will receive the signal, and then the code reverts to having no signal handler for the signal. This can leave the other sigwait()ing threads stranded permanently if the signal is later ignored, or can result in process termination when the process should have delivered the signal to one of the threads in sigwait(). To fix this problem, maintain a count of sigwait()ers for each signal that has no default signal handler. Use the count to correctly install/uninstall dummy signal handlers. Reviewed by: deischen Notes: svn path=/head/; revision=62181
* pthread_mutex_lock(), pthread_cond_trywait(), and pthread_cond_wait() areJason Evans2000-06-146-36/+125
| | | | | | | | | | | | | not allowed to return EINTR, but use of pthread_suspend_np() could cause EINTR to be returned. To fix this, restructure pthread_suspend_np() so that it does not interrupt a thread that is waiting on a mutex or condition, and keep enough state around that pthread_resume_np() can fix things up afterwards. Reviewed by: deischen Notes: svn path=/head/; revision=61681
* Back out the previous change to the queue(3) interface.Jake Burkholder2000-05-261-20/+20
| | | | | | | | | It was not discussed and should probably not happen. Requested by: msmith and others Notes: svn path=/head/; revision=60938
* Change the way that the queue(3) structures are declared; don't assume thatJake Burkholder2000-05-231-20/+20
| | | | | | | | | | | the type argument to *_HEAD and *_ENTRY is a struct. Suggested by: phk Reviewed by: phk Approved by: mdodd Notes: svn path=/head/; revision=60833
* Fix a memory leak. pthread_set_name_np() allocates space for a name, butJason Evans2000-05-161-2/+6
| | | | | | | | | was not deallocating space for the previous name, if any. PR: misc/18504 Notes: svn path=/head/; revision=60658
* Fix a memory leak. pthread_set_name_np() allocates space for a name, butJason Evans2000-05-161-0/+4
| | | | | | | | | _thread_gc() was not deallocating it. PR: misc/18504 Notes: svn path=/head/; revision=60656
* Fixed missing consts for function parameters, so that the code matchesBruce Evans2000-05-113-3/+6
| | | | | | | | the man page and POSIX.1. Fixed nearby misformatting. Fixed a missing prototype. Notes: svn path=/head/; revision=60382
* Add missing man pages. Fix various compliance bugs, mostly having to do withJason Evans2000-05-025-21/+34
| | | | | | | | | error return values. Implement pthread_mutexattr_gettype(). PR: docs/16537, docs/17538 Notes: svn path=/head/; revision=59892
* Add a wrapper for the sendfile() system call.Jason Evans2000-04-271-0/+1
| | | | | | | PR: bin/17366 Notes: svn path=/head/; revision=59671
* Explicitly include sys/cdefs.h to get the definition of __strong_reference(),Jason Evans2000-03-181-0/+1
| | | | | | | rather than getting lucky due to header dependencies. Notes: svn path=/head/; revision=58259
* Fix pthread_suspend_np/pthread_resume_np. For the record, suspending aDaniel Eischen2000-03-159-31/+125
| | | | | | | | | | | | | | | | | thread waiting on an event (I/O, condvar, etc) will, when resumed using pthread_resume_np, return with EINTR. For example, suspending and resuming a thread blocked on read() will not requeue the thread for the read, but will return -1 with errno = EINTR. If the suspended thread is in a critical region, the thread is suspended as soon as it leaves the critical region. Fix a bogon in pthread_kill() where a signal was being delivered twice to threads waiting in sigwait(). Reported by (suspend/resume bug): jdp Reviewed by: jasone Notes: svn path=/head/; revision=58094
* For errors, return -1 and set errno to indicate the error type, rather thanJason Evans2000-02-161-16/+33
| | | | | | | | | | | | returning the error directly. For sem_post(), make sure that the correct thread is woken up. This has unfortunate performance implications, but is necessary for POSIX compliance. Approved by: jkh Notes: svn path=/head/; revision=57261
* Use __strong_reference() instead of __weak_reference() to assure that theJason Evans2000-01-2911-11/+11
| | | | | | | weak symbols of the same name are not used. Notes: svn path=/head/; revision=56888
* Use _fcntl() (not fcntl()) inside of fcntl().Jason Evans2000-01-281-3/+3
| | | | | | | Reported by: green Notes: svn path=/head/; revision=56771
* Simplify sytem call renaming. Instead of _foo() <-- _libc_foo <-- foo(),Jason Evans2000-01-2732-80/+570
| | | | | | | | | | | | | | | | | | | | just use _foo() <-- foo(). In the case of a libpthread that doesn't do call conversion (such as linuxthreads and our upcoming libpthread), this is adequate. In the case of libc_r, we still need three names, which are now _thread_sys_foo() <-- _foo() <-- foo(). Convert all internal libc usage of: aio_suspend(), close(), fsync(), msync(), nanosleep(), open(), fcntl(), read(), and write() to _foo() instead of foo(). Remove all internal libc usage of: creat(), pause(), sleep(), system(), tcdrain(), wait(), and waitpid(). Make thread cancellation fully POSIX-compliant. Suggested by: deischen Notes: svn path=/head/; revision=56698
* Fix millisecond to nanosecond conversion.Jason Evans2000-01-221-1/+1
| | | | | | | PR: misc/16245 Notes: svn path=/head/; revision=56388
* Minor *jmp() cleanups.Jason Evans2000-01-201-2/+3
| | | | Notes: svn path=/head/; revision=56344
* Add sem_*() functions. Named semaphores and process-shared semaphoresJason Evans2000-01-203-0/+237
| | | | | | | | | | are not supported by this implementation, and the error return values from sem_init(), sem_open(), sem_close(), and sem_unlink() reflect this. Approved by: jkh Notes: svn path=/head/; revision=56320
* Do signal deferral for pthread_kill() as it was done in the old days.Jason Evans2000-01-203-30/+6
| | | | | | | Submitted by: deischen Notes: svn path=/head/; revision=56310
* Implement continuations to correctly handle [sig|_]longjmp() inside of aJason Evans2000-01-1912-61/+374
| | | | | | | | | | | | | | | | | | | | | | | | | signal handler. Explicitly check for jumps to anywhere other than the current stack, since such jumps are undefined according to POSIX. While we're at it, convert thread cancellation to use continuations, since it's cleaner than the original cancellation code. Avoid delivering a signal to a thread twice. This was a pre-existing bug, but was likely unexposed until these other changes were made. Defer signals generated by pthread_kill() so that they can be delivered on the appropriate stack. deischen claims that this is unnecessary, which is likely true, but without this change, pthread_kill() can cause undefined priority queue states and/or PANICs in [sig|_]longjmp(), so I'm leaving this in for now. To compile this code out and exercise the bug, define the _NO_UNDISPATCH cpp macro. Defining _PTHREADS_INVARIANTS as well will cause earlier crashes. PR: kern/14685 Collaboration with: deischen Notes: svn path=/head/; revision=56277
* Properly initialize the last active time of the initial thread. This fixesDaniel Eischen2000-01-181-0/+6
| | | | | | | | | | the case that a CPU hungry main thread is prevented from being preempted due to a negative calculation of its time slice. Reported by: Alexander Litvin <archer@lucky.net> Notes: svn path=/head/; revision=56236
* Track libc's three-tier symbol naming. libc_r must currently implementJason Evans2000-01-1226-32/+75
| | | | | | | | the _libc_*() entry points and add *() weak aliases. This will all change for the better when libc_r becomes libpthread. Notes: svn path=/head/; revision=55838
* Make sched_param parameter a const to comply with POSIX and SUSv2 specs.Daniel Eischen2000-01-101-1/+1
| | | | | | | | | | This doesn't need to be applied to stable, because somehow -stable seems to have gotten it right. Reviewed by: jasone Notes: svn path=/head/; revision=55708
* Don't explicitly mmap() red zones at the bottom of thread stacks (exceptJason Evans1999-12-293-16/+26
| | | | | | | | | | | | | the initial thread). Instead, just leave an unmapped gap between thread stacks and make sure that the thread stacks won't grow into these gaps, simply by limiting the size of the stacks with the 'len' argument to mmap(). This (if I understand correctly) reduces VM overhead considerably. Reviewed by: deischen Notes: svn path=/head/; revision=55222
* -Wall and minor style(9) cleanups.Daniel Eischen1999-12-287-16/+14
| | | | Notes: svn path=/head/; revision=55194
* Change stack allocation algorithm to make better use of memoryDaniel Eischen1999-12-282-22/+20
| | | | | | | | (it was leaving an unused block). Also protect the global stack pointer from context changes while fiddling with it. Notes: svn path=/head/; revision=55193
* Don't wakeup threads when there is a process signal and no installedDaniel Eischen1999-12-281-23/+37
| | | | | | | | | | | handler. Thread-to-thread signals (pthread_signal) are treated differently than process signals; a pthread_signal can wakeup a blocked thread if a signal handler is not installed for that signal. Found by: ACE tests Notes: svn path=/head/; revision=55192
* Fix some minor POSIX/SUSv2 compliance nits.Jason Evans1999-12-181-7/+4
| | | | | | | PR: kern/11982 Notes: svn path=/head/; revision=54757
* Fix problems with cancellation while in critical regions.Daniel Eischen1999-12-176-8/+21
| | | | | | | | | | | | | | o Cancellation flags were not getting properly set/cleared. o Loops waiting for internal locks were not being exited correctly by a cancelled thread. o Minor spelling (cancelation -> cancellation) and formatting corrections (missing tab). Found by: tg Reviewed by: jasone Notes: svn path=/head/; revision=54708
* Fixes for signal handling:Daniel Eischen1999-12-175-147/+208
| | | | | | | | | | | | | | | | | o Don't call signal handlers with the signal handler access lock held. o Remove pending signals before calling signal handlers. If pending signals were not removed prior to handling them, invocation of the handler could cause the handler to be called more than once for the same signal. Found by: JB o When SIGCHLD arrives, wake up all threads in PS_WAIT_WAIT (wait4). PR: bin/15328 Reviewed by: jasone Notes: svn path=/head/; revision=54707
* Avoid an infinite loop if the last element of the iov array passed toJason Evans1999-12-161-1/+13
| | | | | | | | | writev() has an iov_len of 0. PR: bin/8281 Notes: svn path=/head/; revision=54701
* Change signal handling to conform to POSIX specified semantics.Daniel Eischen1999-12-044-27/+79
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this change, a signal was delivered to each thread that didn't have the signal masked. Signals also improperly woke up threads waiting on I/O. With this change, signals are now handled in the following way: o If a thread is waiting in a sigwait for the signal, then the thread is woken up. o If no threads are sigwait'ing on the signal and a thread is in a sigsuspend waiting for the signal, then the thread is woken up. o In the case that no threads are waiting or suspended on the signal, then the signal is delivered to the first thread we find that has the signal unmasked. o If no threads are waiting or suspended on the signal, and no threads have the signal unmasked, then the signal is added to the process wide pending signal set. The signal will be delivered to the first thread that unmasks the signal. If there is an installed signal handler, it is only invoked if the chosen thread was not in a sigwait. In the case that multiple threads are waiting or suspended on a signal, or multiple threads have the signal unmasked, we wake up/deliver the signal to the first thread we find. The above rules still apply. Reported by: Scott Hess <scott@avantgo.com> Reviewed by: jb, jasone Notes: svn path=/head/; revision=54138
* * Fix the stack allocation code so that it works for alpha. Change itDoug Rabson1999-11-282-6/+26
| | | | | | | | | | | | to use mmap(..., MAP_STACK, ...) on alpha too since that should work now. * Add hooks to allow GDB to access the internals of pthreads without having to know the exact layout of struct pthread. Reviewed by: deischen Notes: svn path=/head/; revision=53847
* add pthread_cancel, obtained from OpenBSD.Alfred Perlstein1999-11-2826-69/+501
| | | | | | | | | | | | | | | | | eischen (Daniel Eischen) added wrappers to protect against cancled threads orphaning internal resources. the cancelability code is still a bit fuzzy but works for test programs of my own, OpenBSD's and some examples from ORA's books. add readdir_r to both libc and libc_r add some 'const' attributes to function parameters Reviewed by: eischen, jasone Notes: svn path=/head/; revision=53812
* Add the proper headers so that the SIGNOTEMPTY and SIGSETANDMarcel Moolenaar1999-09-301-0/+2
| | | | | | | macros are defined. Notes: svn path=/head/; revision=51816
* sigset_t change (part 5 of 5)Marcel Moolenaar1999-09-298-17/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------- Most of the userland changes are in libc. For both the alpha and the i386 setjmp has been changed to accomodate for the new sigset_t. Internally, libc is mostly rewritten to use the new syscalls. The exception is in compat-43/sigcompat.c The POSIX thread library has also been rewritten to use the new sigset_t. Except, that it currently only handles NSIG signals instead of the maximum _SIG_MAXSIG. This should not be a problem because current applications don't use any signals higher than NSIG. There are version bumps for the following libraries: libdialog libreadline libc libc_r libedit libftpio libss These libraries either a) have one of the modified structures visible in the interface, or b) use sigset_t internally and may cause breakage if new binaries are used against libraries that don't have the sigset_t change. This not an immediate issue, but will be as soon as applications start using the new range to its fullest. NOTE: libncurses already had an version bump and has not been given one now. NOTE: doscmd is a real casualty and has been disconnected for the moment. Reconnection will eventually happen after doscmd has been fixed. I'm aware that being the last one to touch it, I'm automaticly promoted to being maintainer. According to good taste this means that I will receive a badge which either will be glued or mechanically stapled, drilled or otherwise violently forced onto me :-) NOTE: pcvt/vttest cannot be compiled with -traditional. The change cause sys/types to be included along the way which contains the const and volatile modifiers. I don't consider this a solution, but more a workaround. Notes: svn path=/head/; revision=51794
* Fix a memory leak: free the thread-specific poll_data, used in the select()Dmitrij Tejblum1999-08-301-0/+6
| | | | | | | | | | implementation. PR: 13368 Submitted by: Steve Bernacki, Jr. <steve@copacetic.net> Notes: svn path=/head/; revision=50660
* When checking for valid timevals in the wrapped select() and poll()Daniel Eischen1999-08-303-9/+14
| | | | | | | | routines, don't return EINVAL but set errno to EINVAL and return -1. Added a check in pthread_cond_timedwait for a null timespec pointer. Notes: svn path=/head/; revision=50601
* $Id$ -> $FreeBSD$Peter Wemm1999-08-2878-78/+78
| | | | Notes: svn path=/head/; revision=50476
* move sanity check of timeval struct so as not to segfault when passedAlfred Perlstein1999-08-201-5/+5
| | | | | | | | | | a null pointer. Pointed out by: Thomas Gellekum <tg@ihf.rwth-aachen.de> Reviewed by: eivind Notes: svn path=/head/; revision=50093
* When checking if there is a stack to free, observe the fact that itJohn Birrell1999-08-201-6/+23
| | | | | | | | | | | might have been mmapped, and if so, passing the pointer to free() is really not a good idea. [ In the next millenium, when I've taken over the world, I'm going to ban 8 character tabs. You've been warned. ] Notes: svn path=/head/; revision=50083
* time_to_sleep->tv_nsec > 1000000000Alfred Perlstein1999-08-191-2/+2
| | | | | | | | -to- time_to_sleep->tv_nsec >= 1000000000 Notes: svn path=/head/; revision=50066
* Sanity check time structures passed in, return EINVAL like the systemAlfred Perlstein1999-08-194-6/+18
| | | | | | | | | | | calls do to avoid corrupting the thread library's concept of wakeup time. PR: kern/12141 Reviewed by: deischen, eivind Notes: svn path=/head/; revision=50065
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