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* Don't lock scheduler lock twice.David Xu2003-06-181-2/+1
| | | | Notes: svn path=/head/; revision=116514
* After selecting a thread to handle a signal and takingDaniel Eischen2003-06-081-3/+8
| | | | | | | | | | | its scheduling lock, make sure that the thread still has the signal unmasked. Make a debug statement conditional on debugging being enabled. Notes: svn path=/head/; revision=116061
* Insert threads at the end of the free thread list so thatDaniel Eischen2003-06-081-1/+1
| | | | | | | | | | the chance of getting the same thread id when allocating a new thread is reduced. This won't work if the application creates a new thread for every time a thread exits, but we're still within the allowances of POSIX. Notes: svn path=/head/; revision=116060
* Only init _thread_sigact once, needn't init it again after a fork().David Xu2003-06-041-31/+31
| | | | | | | Obtained from: deischen Notes: svn path=/head/; revision=115828
* Despite whether threaded mode is turned on, always save thread'sDavid Xu2003-06-041-4/+6
| | | | | | | signal mask. Notes: svn path=/head/; revision=115827
* KMF_DONE is now in /sys/sys/kse.h, no longer need to define it here.David Xu2003-06-042-7/+0
| | | | Notes: svn path=/head/; revision=115798
* Free memory of internal low level lock when mutex and condition variableDavid Xu2003-06-032-0/+9
| | | | | | | | | are destroyed. Submitted by: tegge Notes: svn path=/head/; revision=115761
* Save THR_FLAGS_IN_TDLIST in signal frame, otherwise if a thread receivedDavid Xu2003-05-301-1/+2
| | | | | | | | | | a signal will can not be removed from thread list after it exited. Reviewed by: deischen Approved by: re (jhb) Notes: svn path=/head/; revision=115413
* Attempt to eliminate PLT relocations from rwlock aquire/releaseAlexander Kabaev2003-05-308-21/+192
| | | | | | | | | | | | | | path, making them suitable for direct use by the dynamic loader. Register libpthread-specific locking API with rtld on startup. This still has some rough edges with signals which should be addresses later. Approved by: re (scottl) Notes: svn path=/head/; revision=115399
* Call the __sys_sigprocmask(the system call) when sigprocmask()Daniel Eischen2003-05-301-1/+4
| | | | | | | | | | | | is called and the application is not threaded. This works around a problem when an application that hasn't yet become threaded tries to jump out of a signal handler. Reported by: mbr Approved by: re@ (rwatson) Notes: svn path=/head/; revision=115398
* Don't really spin on a spinlock; silently convert it to the sameDaniel Eischen2003-05-294-16/+71
| | | | | | | | | | | | | | | low-level lock used by the libpthread implementation. In the future, we'll eliminate spinlocks from libc but that will wait until after 5.1-release. Don't call an application signal handler if the handler is the same as the library-installed handler. This seems to be possible after a fork and is the cause of konsole hangs. Approved by: re@ (jhb) Notes: svn path=/head/; revision=115381
* Change low-level locking a bit so that we can tell ifDaniel Eischen2003-05-2410-134/+263
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | a lock is being waitied on. Fix a races in join and cancellation. When trying to wait on a CV and the library is not yet threaded, make it threaded so that waiting actually works. When trying to nanosleep() and we're not threaded, just call the system call nanosleep instead of adding the thread to the wait queue. Clean up adding/removing new threads to the "all threads queue", assigning them unique ids, and tracking how many active threads there are. Do it all when the thread is added to the scheduling queue instead of making pthread_create() know how to do it. Fix a race where a thread could be marked for signal delivery but it could be exited before we actually add the signal to it. Other minor cleanups and bug fixes. Submitted by: davidxu Approved by: re@ (blanket for libpthread) Notes: svn path=/head/; revision=115278
* Eek, staticize a couple of functions that shouldn'tDaniel Eischen2003-05-193-23/+21
| | | | | | | | | | | | | | | be external (initialize()!). Remove cancellation points from _pthread_cond_wait and _pthread_cond_timedwait (single underscore versions are libc private functions). Point the weak reference(!) for these functions to the versions with cancellation points. Approved by: re@(blanket till 5/19) Pointed out by: kan (cancellation point bug) Notes: svn path=/head/; revision=115173
* Add a method of yielding the current thread with the schedulerDaniel Eischen2003-05-1612-285/+311
| | | | | | | | | | | | | | | | | | | | | | | | | | lock held (_thr_sched_switch_unlocked()) and use this to avoid dropping the scheduler lock and having the scheduler retake the same lock again. Add a better way of detecting if a low-level lock is in use. When switching out a thread due to blocking in the UTS, don't switch to the KSE's scheduler stack only to switch back to another thread. If possible switch to the new thread directly from the old thread and avoid the overhead of the extra context switch. Check for pending signals on a thread when entering the scheduler and add them to the threads signal frame. This includes some other minor signal fixes. Most of this was a joint effor between davidxu and myself. Reviewed by: davidxu Approved by: re@ (blanket for libpthread) Notes: svn path=/head/; revision=115080
* Make pthread_join() async-cancel-safe. David was going to commitDaniel Eischen2003-05-061-9/+0
| | | | | | | | | | this, but I think he's asleep and want to be sure it gets in before the freeze. Submitted by: davidxu Notes: svn path=/head/; revision=114767
* call dump_queues() only when DEBUG_THREAD_KERN is defined, save someDavid Xu2003-05-051-0/+2
| | | | | | | cpu cycles. Notes: svn path=/head/; revision=114688
* Fix suspend and resume.Daniel Eischen2003-05-046-43/+47
| | | | | | | Submitted (in part) by: Kazuaki Oda <kaakun@highway.ne.jp> Notes: svn path=/head/; revision=114664
* Handle thread canceled case, it is same as signal caused backout,David Xu2003-05-021-1/+1
| | | | | | | but will break out of loop. Notes: svn path=/head/; revision=114524
* Move the mailbox to the beginning of the thread and align theDaniel Eischen2003-04-304-7/+21
| | | | | | | thread so that the context (SSE FPU state) is also aligned. Notes: svn path=/head/; revision=114295
* Call kse_wakeup_mutli() after remove current thread from RUNQ to avoidDavid Xu2003-04-301-1/+1
| | | | | | | doing unnecessary idle kse wakeup. Notes: svn path=/head/; revision=114267
* Call kse_wakeup_multi() to wakeup idle KSEs when there are threads readyDavid Xu2003-04-301-0/+1
| | | | | | | to run. Notes: svn path=/head/; revision=114266
* Create the thread signal lock as a KSE lock (as opposed toDaniel Eischen2003-04-293-22/+23
| | | | | | | | | | | | | | | a thread lock). Better protect access to thread state while searching for threads to handle a signal. Better protect access to process pending signals while processing a thread in sigwait(). Submitted by: davidxu Notes: svn path=/head/; revision=114254
* o Don't add a scope system thread's KSE to the list of availableDaniel Eischen2003-04-2817-157/+318
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | KSEs when it's thread exits; allow the GC handler to do that. o Make spinlock/spinlock critical regions. The following were submitted by davidxu o Alow thr_switch() to take a null mailbox argument. o Better protect cancellation checks. o Don't set KSE specific data when creating new KSEs; rely on the first upcall of the KSE to set it. o Add the ability to set the maximum concurrency level and do this automatically. We should have a way to enable/disable this with some sort of tunable because some applications may not want this to be the default. o Hold the scheduling lock across thread switch calls. o If scheduling of a thread fails, make sure to remove it from the list of active threads. o Better protect accesses to a joining threads when the target thread is exited and detached. o Remove some macro definitions that are now provided by <sys/kse.h>. o Don't leave the library in threaded mode if creation of the initial KSE fails. o Wakeup idle KSEs when there are threads ready to run. o Maintain the number of threads active in the priority queue. Notes: svn path=/head/; revision=114187
* Use the correct link entry for walking the list of threads.Daniel Eischen2003-04-281-9/+2
| | | | | | | | | | | While I'm here, use the TAILQ_FOREACH macro instead of a more manual method which was inherited from libc_r (so we could remove elements from the list which isn't needed for libpthread). Submitted by: Kazuaki Oda <kaakun@highway.ne.jp> Notes: svn path=/head/; revision=114180
* Protect thread errno from being changed while operatingDaniel Eischen2003-04-232-0/+33
| | | | | | | | | | | on behalf of the KSE. Add a kse_reinit function to reinitialize a reused KSE. Submitted by: davidxu Notes: svn path=/head/; revision=113942
* Set the quantum for scope system threads to 0 (no quantum).Daniel Eischen2003-04-221-0/+2
| | | | Notes: svn path=/head/; revision=113881
* Add a working pthread_[gs]etconcurrency. Initial null implementationDaniel Eischen2003-04-222-0/+121
| | | | | | | | | | | | provided by Sergey A. Osokin <osa@freebsd.org.ru>. In order to test this on a single CPU machine, you need to: sysctl kern.threads.debug=1 sysctl kern.threads.virtual_cpu=2 Notes: svn path=/head/; revision=113871
* Add a couple asserts to pthread_cond_foo to ensure the (low-level)Daniel Eischen2003-04-225-21/+72
| | | | | | | | | | | | | | | | | | lock level is 0. Thus far, the threads implementation doesn't use mutexes or condition variables so the lock level should be 0. Save the return value when trying to schedule a new thread and use this to return an error from pthread_create(). Change the max sleep time for an idle KSE to 1 minute from 2 minutes. Maintain a count of the number of KSEs within a KSEG. With these changes scope system threads seem to work, but heavy use of them crash the kernel (supposedly VM bugs). Notes: svn path=/head/; revision=113870
* Add an i386-specifc hack to always set %gs. There still seemsDaniel Eischen2003-04-216-182/+284
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | to be instances where the kernel doesn't properly save and/or restore it. Use noupcall and nocompleted flags in the KSE mailbox. These require kernel changes to work which will be committed sometime later. Things still work without the changes. Remove the general kse entry function and use two different functions -- one for scope system threads and one for scope process threads. The scope system function is not yet enabled and we use the same function for all threads at the moment. Keep a copy of the KSE stack for the case that a KSE runs a scope system thread and uses the same stack as the thread (no upcalls are generated, so a separate stack isn't needed). This isn't enabled yet. Use a separate field for the KSE waiting flag. It isn't correct to use the mailbox flags field. The following fixes were provided by David Xu: o Initialize condition variable locks with thread versions of the low-level locking functions instead of the kse versions. o Enable threading before creating the first thread instead of after. o Don't enter critical regions when trying to malloc/free or call functions that malloc/free. o Take the scheduling lock when inheriting thread attributes. o Check the attribute's stack pointer instead of the attributes stack size for null when allocating a thread's stack. o Add a kseg reinit function so we don't have to destroy and then recreate the same lock. o Check the return value of kse_create() and return an appropriate error if it fails. o Don't forget to destroy a thread's locks when freeing it. o Examine the correct flags word for checking to see if a thread is in a synchronization queue. Things should now work on an SMP kernel. Notes: svn path=/head/; revision=113786
* Remove duplicate $FreeBSD$ id.Daniel Eischen2003-04-181-3/+1
| | | | Notes: svn path=/head/; revision=113662
* Sorry folks; I accidentally committed a patch from what I was workingDaniel Eischen2003-04-1811-186/+306
| | | | | | | | | on a couple of days ago. This should be the most recent changes. Noticed by: davidxu Notes: svn path=/head/; revision=113661
* Revamp libpthread so that it has a chance of working in an SMPDaniel Eischen2003-04-1874-3888/+5324
| | | | | | | | | | | | | | | | | | | | | | environment. This includes support for multiple KSEs and KSEGs. The ability to create more than 1 KSE via pthread_setconcurrency() is in the works as well as support for PTHREAD_SCOPE_SYSTEM threads. Those should come shortly. There are still some known issues which davidxu and I are working on, but it'll make it easier for us by committing what we have. This library now passes all of the ACE tests that libc_r passes with the exception of one. It also seems to work OK with KDE including konqueror, kwrite, etc. I haven't been able to get mozilla to run due to lack of java plugin, so I'd be interested to see how it works with that. Reviewed by: davidxu Notes: svn path=/head/; revision=113658
* - Define a _spinunlock() function so that threading implementations may doJeff Roberson2003-03-261-0/+7
| | | | | | | | | more complicated things than just setting the lock to 0. - Implement stubs for this function in libc and the two threading libraries that are currently in the tree. Notes: svn path=/head/; revision=112665
* Backout last commit.David Xu2003-03-151-1/+1
| | | | | | | Requested by: jhb Notes: svn path=/head/; revision=112253
* Fix a bug in rwlock. When a rwlock was locked by reader threads, aDavid Xu2003-03-141-1/+1
| | | | | | | writter thread can block reader threads to get read lock. Notes: svn path=/head/; revision=112218
* Fix cut'n'paste errorAlexey Zelkin2003-03-051-1/+1
| | | | | | | Noticed by: julian Notes: svn path=/head/; revision=111928
* MFlibc_r: add and document pthread_attr_get_np() function.Alexey Zelkin2003-03-032-0/+58
| | | | Notes: svn path=/head/; revision=111846
* Fix compiling error.David Xu2003-02-261-1/+1
| | | | Notes: svn path=/head/; revision=111542
* Insert threads interrupted by a signal while running onto the run queue.Jonathan Mini2003-02-232-26/+3
| | | | Notes: svn path=/head/; revision=111360
* Add signal logic to the build.Jonathan Mini2003-02-231-0/+2
| | | | Notes: svn path=/head/; revision=111359
* Deliver signals posted via an upcall to the appropriate thread.Jonathan Mini2003-02-176-525/+274
| | | | Notes: svn path=/head/; revision=111035
* Actually link in the attr_{set,get}stack.Alfred Perlstein2003-02-111-0/+2
| | | | Notes: svn path=/head/; revision=110677
* Add pthread_attr_getstack() and pthread_attr_setstack().Alfred Perlstein2003-02-102-0/+117
| | | | | | | Submitted by: Craig Rodrigues <rodrigc@attbi.com> Notes: svn path=/head/; revision=110636
* Schedule spinlocked threads by moving them through the work queue, insteadJonathan Mini2002-11-241-2/+15
| | | | | | | | | | of the wait queue. Approved by: re (blanket) Stolen from: davidxu Notes: svn path=/head/; revision=107202
* Get the wall clock time from the KSE mailbox, rather than doing anotherJonathan Mini2002-11-241-2/+2
| | | | | | | syscall. Notes: svn path=/head/; revision=107201
* Fix idle timeout bug, use correct current time of day.David Xu2002-11-201-2/+2
| | | | Notes: svn path=/head/; revision=107102
* Schedule an idle context to block until timeouts expire without blockingJonathan Mini2002-11-123-107/+89
| | | | | | | further upcalls. Notes: svn path=/head/; revision=106786
* Make pthread_sigmask(3) operate on the thread signal mask, not the processJonathan Mini2002-10-301-1/+27
| | | | | | | signal mask. Notes: svn path=/head/; revision=106193
* Use KSE to schedule threads.Jonathan Mini2002-10-307-257/+366
| | | | Notes: svn path=/head/; revision=106191
* Add the 'restrict' type qualifier to the prototypes of `sigaction',Robert Drehmel2002-10-021-1/+1
| | | | | | | | | `sigprocmask', `sigaltstack', and `sigwait' as well as to the prototypes of the apparantly unimplemented functions `sigtimedwait' and `sigwaitinfo'. This complies with IEEE Std 1003.1-2001. Notes: svn path=/head/; revision=104368
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