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* 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
* Respect POSIX specification, a value return from pthread_attr_getguardsizeDavid Xu2003-09-142-16/+18
| | | | | | | | | | | | should be a value past to pthread_attr_setguardsize, not a rounded up value. Also fix a stack size matching bug in thr_stack.c, now stack matching code uses number of pages but not bytes length to match stack size, so for example, size 512 bytes and size 513 bytes should both match 1 page stack size. Reviewed by: deischen Notes: svn path=/head/; revision=120072
* Avoid garbage bits in c_flags by direct assigning value.David Xu2003-09-141-1/+1
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=120069
* If user is seting scope process flag, clear PTHREAD_SCOPE_SYSTEM bitDavid Xu2003-09-141-2/+4
| | | | | | | | | accordingly. Reviewed by: deischen Notes: svn path=/head/; revision=120068
* Check invalid parameter and return EINVAL.David Xu2003-09-141-0/+3
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=120066
* Original pthread_once code has memory leak if pthread_once_t is used inDavid Xu2003-09-092-9/+52
| | | | | | | | | | | | | | | | | | a shared library or any other dyanmic allocated data block, once pthread_once_t is initialized, a mutex is allocated, if we unload the shared library or free those data block, then there is no way to deallocate the mutex, result is memory leak. To fix this problem, we don't use mutex field in pthread_once_t, instead, we use its state field and an internal mutex and conditional variable in libkse to do any synchronization, we introduce a third state IN_PROGRESS to wait if another thread is already in invoking init_routine(). Also while I am here, make pthread_once() conformed to pthread cancellation point specification. Reviewed by: deischen Notes: svn path=/head/; revision=119928
* Add code to support pthread spin lock.David Xu2003-09-093-0/+161
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=119909
* Add small piece of code to support pthread_rwlock_timedrdlock andDavid Xu2003-09-061-8/+43
| | | | | | | pthread_rwlock_timedrwlock. Notes: svn path=/head/; revision=119790
* Add code to support barrier synchronous object and implementDavid Xu2003-09-046-6/+346
| | | | | | | | | pthread_mutex_timedlock(). Reviewed by: deischen Notes: svn path=/head/; revision=119736
* Remove repeated macro THR_IN_CONDQ.David Xu2003-09-041-1/+0
| | | | Notes: svn path=/head/; revision=119733
* Allow hooks registered by atexit() to run with current thread pointer set,David Xu2003-09-041-1/+4
| | | | | | | without this change, my atexit test dumps core. Notes: svn path=/head/; revision=119732
* Don't assume sizeof(long) = sizeof(int) on x86; use intDaniel Eischen2003-09-038-0/+17
| | | | | | | | | | | | | | | instead of long types for low-level locks. Add prototypes for some internal libc functions that are wrapped by the library as cancellation points. Add memory barriers to alpha atomic swap functions (submitted by davidxu). Requested by: bde Notes: svn path=/head/; revision=119723
* Move kse_wakeup_multi call to just before KSE_SCHED_UNLOCK.David Xu2003-09-031-4/+2
| | | | | | | Tested on: SMP Notes: svn path=/head/; revision=119700
* Allow the concurrency level to be reduced.Daniel Eischen2003-08-303-35/+63
| | | | | | | Reviewed by: davidxu Notes: svn path=/head/; revision=119577
* Repost masked signal to kernel for scope system thread, it hardly happensDavid Xu2003-08-211-6/+25
| | | | | | | | | in real world. Reviewed by: deischen Notes: svn path=/head/; revision=119249
* _thr_sig_check_pending is also called by scope system thread when it leavesDavid Xu2003-08-201-0/+3
| | | | | | | | | | | | critical region, we wrap some syscalls for thread cancellation point, and when syscalls returns, we call _thr_leave_cancellation_point, at the time if a signal comes in, it would be buffered, and when the thread leaves _thr_leave_cancellation_point, buffered signals will be processed, to avoid messing up normal syscall errno, we should save and restore errno around signal handling code. Notes: svn path=/head/; revision=119177
* Add back a loop for up to PTHREAD_DESTRUCTOR_ITERATIONS toDaniel Eischen2003-08-201-12/+20
| | | | | | | | | | destroy thread-specific data. Display a warning when thread specific data remains after PTHREAD_DESTRUCTOR_ITERATIONS. Reviewed by: davidxu Notes: svn path=/head/; revision=119154
* Support printing 64 bits pointer and long integer.David Xu2003-08-191-10/+27
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=119117
* Save and restore errno around sigprocmask.David Xu2003-08-191-1/+5
| | | | Notes: svn path=/head/; revision=119099
* Direct call exit if thread was never created. This makes it safe to callDavid Xu2003-08-181-0/+2
| | | | | | | | | pthread_exit in main() without creating any thread. Tessted by: deischen Notes: svn path=/head/; revision=119064
* Treat initial thread as scope system thread when KSE mode is not activatedDavid Xu2003-08-1812-81/+47
| | | | | | | | | | | | yet, so we can protect some locking code from being interrupted by signal handling. When KSE mode is turned on, reset the thread flag to scope process except we are running in 1:1 mode which we needn't turn it off. Also remove some unused member variables in structure kse. Tested by: deischen Notes: svn path=/head/; revision=119063
* If threaded mode is not turned on yet, direct call __sys_sched_yield.David Xu2003-08-161-2/+3
| | | | Notes: svn path=/head/; revision=118989
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