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* Fix typo in SEE ALSO section.Jason Evans2000-06-281-1/+1
| | | | Notes: svn path=/head/; revision=62197
* 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
* Fix a misspelling: undefied -> undefinedChris Costello2000-05-271-1/+1
| | | | Notes: svn path=/head/; revision=60985
* 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
* add MLINKS: pthread_testcancel(3) -> pthread_setcanceltype(3)Alexey Zelkin2000-05-121-0/+1
| | | | Notes: svn path=/head/; revision=60464
* "Fixed" missing include in synopsis. POSIX.1-1996 only specifiesBruce Evans2000-05-112-0/+2
| | | | | | | | including <signal.h>, but that must be a bug in POSIX.1, because it also specifies that the relevant prototype is [only] in <pthread.h>. Notes: svn path=/head/; revision=60386
* Fixed misspelling of a struct tag in a function parameter type.Bruce Evans2000-05-111-1/+1
| | | | Notes: svn path=/head/; revision=60385
* 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
* Fix miscellaneous mdoc macro argument limit infringements.Sheldon Hearn2000-05-091-1/+1
| | | | | | | | PR: 18465 Reported by: Kazu TAKAMUNE <takamune@avrl.mei.co.jp> Notes: svn path=/head/; revision=60258
* mdoc(7) cleanup:Alexey Zelkin2000-05-047-63/+79
| | | | | | | | | | | | | | . use real function names as `.Nm' macro argument in NAME section. It allows them to appear in apropos(1) or whatis(1) output. . replace empty lines with `.Pp' macro. . replace hardcoded standard names with their `.St' macro equivalents. . sort cross references in SEE ALSO section Notes: svn path=/head/; revision=59944
* Add missing .El macro.Jason Evans2000-05-031-0/+1
| | | | Notes: svn path=/head/; revision=59916
* Add missing man pages. Fix various compliance bugs, mostly having to do withJason Evans2000-05-0213-25/+875
| | | | | | | | | 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 Evans2000-04-272-1/+4
| | | | | | | PR: bin/17366 Notes: svn path=/head/; revision=59671
* Add test to detect propagation of cancellation points within libc_r.Jason Evans2000-04-262-1/+75
| | | | Notes: svn path=/head/; revision=59667
* Automated regression test harness for libc_r. Existing tests are integrated,Jason Evans2000-04-2415-3/+3356
| | | | | | | | a new test for POSIX semaphores was added, and examples of harness usage are included. Notes: svn path=/head/; revision=59612
* Introduce .Lb macro to libc_r manpages.Alexey Zelkin2000-04-2241-0/+82
| | | | Notes: svn path=/head/; revision=59501
* 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
* Remove single-space hard sentence breaks. These degrade the qualitySheldon Hearn2000-03-0213-55/+110
| | | | | | | | of the typeset output, tend to make diffs harder to read and provide bad examples for new-comers to mdoc. Notes: svn path=/head/; revision=57686
* Fix the installworld breakage from rev 1.9.Ruslan Ermilov2000-02-181-5/+4
| | | | | | | | | | Submitted by: reg Reviewed by: ru Approved by: jasone (rev 1.9) Pointy hat to: unfurl Notes: svn path=/head/; revision=57319
* fixed missing trailing \Bill Swingle2000-02-181-1/+1
| | | | | | | Submitted by: Thimble Smith <tim@mysql.com> Notes: svn path=/head/; revision=57309
* Adds missing symlinks for pthread related manpages.Bill Swingle2000-02-181-0/+3
| | | | | | | | | PR: 16537 Submitted by: AnarCat <beaupran@iro.umontreal.ca> Approved by: jasone Notes: svn path=/head/; revision=57302
* 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
* Add man pages for the sem_*() functions.Jason Evans2000-02-167-4/+516
| | | | | | | Approved by: jkh Notes: svn path=/head/; revision=57260
* 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 Evans2000-01-2733-81/+571
| | | | | | | | | | | | | | | | | | | | 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
* Fixed bitrot in synopsis. The change from "int *pshared" to "int pshared"Bruce Evans1999-12-231-1/+1
| | | | | | | hadn't reached here. Notes: svn path=/head/; revision=55041
* Fix some minor POSIX/SUSv2 compliance nits.Jason Evans1999-12-182-7/+5
| | | | | | | PR: kern/11982 Notes: svn path=/head/; revision=54757
* Fix typosAlexey Zelkin1999-12-174-5/+8
| | | | | | | | PR: docs/14858 Submitted by: OKAZAKI Tetsurou <okazaki@be.to> Notes: svn path=/head/; revision=54744
* 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
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