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* Add cancellation point to sem_wait() and sem_timedwait() for psharedDaniel Eischen2004-02-061-10/+18
| | | | | | | | | | | semaphores. Also add cancellation cleanup handlers to keep semaphores in a consistent state. Submitted in part by: davidxu Reviewed by: davidxu Notes: svn path=/head/; revision=125522
* Provide a userland version of non-pshared semaphores and add cancellationDaniel Eischen2004-02-032-169/+153
| | | | | | | points to sem_wait() and sem_timedwait(). Also make sem_post signal-safe. Notes: svn path=/head/; revision=125373
* Return EPERM if mutex owner is not current thread but it tries toDavid Xu2004-01-171-18/+3
| | | | | | | | | unlock the mutex, old code confuses some programs when it returns EINVAL. Noticed by: bland Notes: svn path=/head/; revision=124606
* Add a simple work-around for deadlocking on recursive read locksDaniel Eischen2004-01-083-48/+86
| | | | | | | | | | | | | on a rwlock while there are writers waiting. We normally favor writers but when a reader already has at least one other read lock, we favor the reader. We don't track all the rwlocks owned by a thread, nor all the threads that own a rwlock -- we just keep a count of all the read locks owned by a thread. PR: 24641 Notes: svn path=/head/; revision=124252
* Kernel now supports per-thread sigaltstack, follow the change toDavid Xu2004-01-031-6/+1
| | | | | | | enable sigaltstack for scope system thread. Notes: svn path=/head/; revision=124095
* Return error code in errno, not in return value.David Xu2004-01-021-3/+6
| | | | Notes: svn path=/head/; revision=124056
* Fix a typo.David Xu2004-01-021-1/+1
| | | | Notes: svn path=/head/; revision=124055
* Forgot to commit this file for last commit. :(David Xu2003-12-291-0/+4
| | | | Notes: svn path=/head/; revision=123975
* Implement sigaltstack() as per-threaded. Current only scope process threadDavid Xu2003-12-294-24/+231
| | | | | | | | | | | is supported, for scope system process, kernel signal bits need to be changed. Reviewed by: deischen Tested on : i386 amd64 ia64 Notes: svn path=/head/; revision=123974
* Correctly retrieve sigaction flags.David Xu2003-12-281-2/+2
| | | | Notes: svn path=/head/; revision=123933
* Replace a comment with more accurated one, memory heap is now protected byDavid Xu2003-12-191-3/+2
| | | | | | | new fork() wrapper. Notes: svn path=/head/; revision=123668
* Code clean up, remove unused MACROS and function prototypes.David Xu2003-12-191-18/+0
| | | | Notes: svn path=/head/; revision=123666
* accept() returns a file descriptor when it succeeds which is veryDaniel Eischen2003-12-092-2/+2
| | | | | | | | | | | | likely to be non-zero. When leaving the cancellation point, check the return value against -1 to see if cancellation should be checked. While I'm here, make the same change to connect() just to be consisitent. Pointed out by: davidxu Notes: svn path=/head/; revision=123365
* Remove an unused struct definition.Daniel Eischen2003-12-091-12/+0
| | | | Notes: svn path=/head/; revision=123356
* Add cancellation points for accept() and connect().Daniel Eischen2003-12-094-0/+102
| | | | Notes: svn path=/head/; revision=123355
* Use mutex instead of low level thread lock to implement spinlock, thisDavid Xu2003-12-091-30/+18
| | | | | | | avoids signal to be blocked when otherwise it can be handled. Notes: svn path=/head/; revision=123314
* Rename _thr_enter_cancellation_point to _thr_cancel_enter, renameDavid Xu2003-12-0930-136/+148
| | | | | | | | | | | | | | | | | | | | | | | | _thr_leave_cancellation_point to _thr_cancel_leave, add a parameter to _thr_cancel_leave to indicate whether cancellation point should be checked, this gives us an option to not check cancallation point if a syscall successfully returns to avoid any leaks, current I have creat(), open() and fcntl(F_DUPFD) to not check cancellation point after they sucessfully returned. Replace some members in structure kse with bit flags to same some memory. Conditionally compile THR_ASSERT to nothing if _PTHREAD_INVARIANTS is not defined. Inline some small functions in thr_cancel.c. Use __predict_false in thr_kern.c for some executed only once code. Reviewd by: deischen Notes: svn path=/head/; revision=123312
* More reliably check timeout for pthread_mutex_timedlock.David Xu2003-12-091-1/+1
| | | | Notes: svn path=/head/; revision=123310
* Go back to using rev 1.18 where thread locks are used instead of KSEDaniel Eischen2003-12-081-17/+16
| | | | | | | | | | locks for [libc] spinlock implementation. This was previously backed out because it exposed a bug in ia64 implementation. OK'd by: marcel Notes: svn path=/head/; revision=123297
* 1.Macro optimizing KSE_LOCK_ACQUIRE and THR_LOCK_ACQUIRE to use static fallDavid Xu2003-11-292-99/+31
| | | | | | | | | | | | | | | | | through branch predict as suggested in INTEL IA32 optimization guide. 2.Allocate siginfo arrary separately to avoid pthread to be allocated at 2K boundary, which hits L1 address alias problem and causes context switch to be slow down. 3.Simplify context switch code by removing redundant code, code size is reduced, so it is expected to run faster. Reviewed by: deischen Approved by: re (scottl) Notes: svn path=/head/; revision=123048
* Remove surplus mmap() call for stack guard page in init_private, it is doneDavid Xu2003-11-291-25/+0
| | | | | | | | | | | in init_main_thread. Also don't initialize lock and lockuser again for initial thread, it is already done by _thr_alloc(). Reviewed by: deischen Approved by: re (scottl) Notes: svn path=/head/; revision=123047
* Back out last change and go back to using KSE locks instead of threadDaniel Eischen2003-11-161-16/+17
| | | | | | | | | locks until we know why this breaks ia64. Reported by: marcel Notes: svn path=/head/; revision=122801
* If a thread in critical region got a synchronous signal, according currentDavid Xu2003-11-091-0/+2
| | | | | | | | | signal handling mode, there is no chance to handle the signal, something must be wrong in the library, just call kse_thr_interrupt to dump its core. I have the code for a long time, but forgot to commit it. Notes: svn path=/head/; revision=122338
* Use THR lock instead of KSE lock to avoid scheduler be blocked in spinlock.David Xu2003-11-081-17/+16
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=122299
* style(9)Daniel Eischen2003-11-051-40/+53
| | | | | | | Reviewed by: bde Notes: svn path=/head/; revision=122131
* Don't declare the malloc lock; use the declaration provided in libc.Daniel Eischen2003-11-051-1/+6
| | | | | | | Noticed by: bde Notes: svn path=/head/; revision=122130
* Add pthread_atfork() source code. Dan forgot to commit this file.David Xu2003-11-051-0/+56
| | | | Notes: svn path=/head/; revision=122089
* Add an implementation for pthread_atfork().Daniel Eischen2003-11-045-6/+71
| | | | | | | | | | | Aside from the POSIX requirements for pthread_atfork(), when fork()ing, take the malloc lock to keep malloc state consistent in the child. Reviewed by: davidxu Notes: svn path=/head/; revision=122075
* Add the ability to reinitialize a spinlock (libc/libpthreadDaniel Eischen2003-11-041-12/+17
| | | | | | | | | internal lock, not a pthread spinlock). Reviewed by: davidxu Notes: svn path=/head/; revision=122073
* s/foo()/foo(void)/Daniel Eischen2003-11-041-2/+3
| | | | | | | Add a blank line after a variable declaration. Notes: svn path=/head/; revision=122072
* Libpthread uses the convention that all of its (non-weak) symbolsDaniel Eischen2003-11-041-5/+11
| | | | | | | | begin with underscores and provide weak definitions without underscores. Make the pthread spinlock conform to this convention. Notes: svn path=/head/; revision=122071
* Add the ability to reinitialize a mutex (internally, not a userlandDaniel Eischen2003-11-041-7/+20
| | | | | | | | | API). Reviewed by: davidxu Notes: svn path=/head/; revision=122070
* Fix some comments for last commit.David Xu2003-10-081-5/+4
| | | | Notes: svn path=/head/; revision=120897
* Complete cancellation support for M:N threads, check cancelling flag whenDavid Xu2003-10-082-69/+157
| | | | | | | | | | thread state is changed from RUNNING to WAIT state and do some cancellation operations for every cancellable state. Reviewed by: deischen Notes: svn path=/head/; revision=120896
* Use thread lock instead of scheduler lock to eliminate lock contentionDavid Xu2003-10-081-18/+21
| | | | | | | | | for all wrapped syscalls under SMP. Reviewed by: deischen Notes: svn path=/head/; revision=120895
* When concurrency level is reduced and a kse is exiting, make sure no otherDavid Xu2003-09-291-0/+13
| | | | | | | | | threads are still referencing the kse by migrating them to initial kse. Reviewed by: deischen Notes: svn path=/head/; revision=120567
* Remove unused variable.David Xu2003-09-281-2/+0
| | | | Notes: svn path=/head/; revision=120554
* pthread API should return error code in return value not in errno.David Xu2003-09-251-2/+2
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=120436
* If syscall failed, restore old sigaction and return error to thread.David Xu2003-09-251-11/+19
| | | | Notes: svn path=/head/; revision=120429
* As comments in _mutex_lock_backout state, only current threadDavid Xu2003-09-241-6/+4
| | | | | | | | | | | | | | | | | can clear the pointer to mutex, not the thread doing mutex handoff. Because _mutex_lock_backout does not hold scheduler lock while testing THR_FLAGS_IN_SYNCQ and then reading mutex pointer, it is possible mutex owner begin to unlock and handoff the mutex to the current thread, and mutex pointer will be cleared to NULL before current thread reading it, so current thread will end up with deferencing a NULL pointer, Fix the race by making mutex waiters to clear their mutex pointers. While I am here, also save inherited priority in mutex for PTHREAD_PRIO_INERIT mutex in mutex_trylock_common just like what we did in mutex_lock_common. Notes: svn path=/head/; revision=120403
* Free thread name memory if there is.David Xu2003-09-231-0/+4
| | | | Notes: svn path=/head/; revision=120370
* Save and restore timeout field for signal frame just like what we didDavid Xu2003-09-222-1/+4
| | | | | | | | | for interrupted field. Also in _thr_sig_handler, retrieve current signal mask from kernel not from ucp, the later is pre-unioned mask, not current signal mask. Notes: svn path=/head/; revision=120338
* Print waitset correctly.David Xu2003-09-221-1/+1
| | | | Notes: svn path=/head/; revision=120325
* Make KSE_STACKSIZE machine dependent by moving it from thr_kern.c toMarcel Moolenaar2003-09-191-2/+0
| | | | | | | | | pthread_md.h. This commit only moves the definition; it does not change it for any of the platforms. This more easily allows 64-bit architectures (in particular) to pick a slightly larger stack size. Notes: svn path=/head/; revision=120263
* pthread api should return error code in return value, not in errno.David Xu2003-09-181-2/+1
| | | | Notes: svn path=/head/; revision=120197
* Fix a typo. Also turn on PTHREAD_SCOPE_SYSTEM after fork().David Xu2003-09-161-1/+2
| | | | Notes: svn path=/head/; revision=120109
* Fix bogus comment and assign sigmask in critical region, useDavid Xu2003-09-151-2/+4
| | | | | | | SIG_CANTMASK to remove unmaskable signal masks. Notes: svn path=/head/; revision=120079
* Fix a bogus comment, sigmask must be maintained correctly,David Xu2003-09-151-1/+1
| | | | | | | it will be inherited in pthread_create. Notes: svn path=/head/; revision=120078
* 1. Allocating and freeing lock related resource in _thr_alloc and _thr_freeDavid Xu2003-09-144-94/+87
| | | | | | | | | | | | | | to avoid potential memory leak, also fix a bug in pthread_create, contention scope should be inherited when PTHREAD_INHERIT_SCHED is set, and also check right field for PTHREAD_INHERIT_SCHED, scheduling inherit flag is in sched_inherit. 2. Execute hooks registered by atexit() on thread stack but not on scheduler stack. 3. Simplify some code in _kse_single_thread by calling xxx_destroy functions. Reviewed by: deischen Notes: svn path=/head/; revision=120074
* When invoking an old style signal handler, use true traditional BSD style toDavid Xu2003-09-141-6/+13
| | | | | | | | | invoke signal handler. Reviewed by: deischen Notes: svn path=/head/; revision=120073
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