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428 Commits

Author SHA1 Message Date
Jason Evans
b6b7fd3e2a Fix pointer dereferencing problems in _pthread_mutex_init_calloc_cb() that 
were obscured by pseudo-opaque pthreads API pointer casting.
 2007-11-28 00:16:24 +00:00
Jason Evans
e1636e1f97 Add _pthread_mutex_init_calloc_cb() to libthr and libkse, so that malloc(3) 
(part of libc) can use pthreads mutexes without causing infinite recursion
during initialization.
 2007-11-27 03:16:44 +00:00
David Xu
da4410f25f Simplify code, fix a thread cancellation bug in sem_wait and sem_timedwait. 2007-11-23 05:42:52 +00:00
David Xu
4877aaebc1 Reuse nwaiter member field to record number of waiters, in sem_post(), 
this should reduce the chance having to do a syscall when there is no
waiter in the semaphore.
 2007-11-21 06:01:02 +00:00
David Xu
73ba600faa Remove warning level and aliasing restrictions. 2007-11-21 05:29:57 +00:00
David Xu
9e1ddd5fa0 Convert ceiling type to unsigned integer before comparing, fix compiler 
warnings.
 2007-11-21 05:25:27 +00:00
David Xu
922d56f9de Add some function prototypes. 2007-11-21 05:23:54 +00:00
David Xu
6fdfcacb4a Remove umtx_t definition, use type long directly, add wrapper function 
_thr_umtx_wait_uint() for umtx operation UMTX_OP_WAIT_UINT, use the
function in semaphore operations, this fixed compiler warnings.
 2007-11-21 05:21:58 +00:00
John Birrell
0aad0f2282 These are the things that the tinderbox has problems with because it 
doesn't use the default CFLAGS which contain -fno-strict-aliasing.

Until the code is cleaned up, just add -fno-strict-aliasing to the
CFLAGS of these for the tinderboxes' sake, allowing the rest of the
tree to have -Werror enabled again.
 2007-11-20 02:07:30 +00:00
Marius Strobl
9a2706abcc In _pthread_key_create() ensure that libthr is initialized. This 
fixes a NULL-dereference of curthread when libstdc+ initializes
the exception handling globals on archs we can't use GNU TLS due
to lack of support in binutils 2.15 (i.e. arm and sparc64), yet,
thus making threaded C++ programs compiled with GCC 4.2.1 work
again on these archs.

Reviewed by:	davidxu
MFC after:	3 days
 2007-11-06 21:50:43 +00:00
David Xu
56b45d9067 Avoid doing adaptive spinning for priority protected mutex, current 
implementation always does lock in kernel.
 2007-10-31 01:50:48 +00:00
David Xu
55f18e070f Don't do adaptive spinning if it is running on UP kernel. 2007-10-31 01:44:50 +00:00
David Xu
e8ef3c283b Restore revision 1.55, the kris's adaptive mutex type. 2007-10-31 01:37:13 +00:00
Kris Kennaway
83941f797f Adaptive mutexes should have the same deadlock detection properties that 
default (errorcheck) mutexes do.

Noticed by:          davidxu
 2007-10-30 09:24:23 +00:00
David Xu
7416cdabcd Add my recent work of adaptive spin mutex code. Use two environments variable 
to tune pthread mutex performance:
1. LIBPTHREAD_SPINLOOPS
	If a pthread mutex is being locked by another thread, this environment
	variable sets total number of spin loops before the current thread
	sleeps in kernel, this saves a syscall overhead if the mutex will be
	unlocked very soon (well written application code).
2. LIBPTHREAD_YIELDLOOPS
	If a pthread mutex is being locked by other threads, this environment
	variable sets total number of sched_yield() loops before the currrent
	thread sleeps in kernel. if a pthread mutex is locked, the current thread
	gives up cpu, but will not sleep in kernel, this means, current thread
	does not set contention bit in mutex, but let lock owner to run again
	if the owner is on kernel's run queue, and when lock owner unlocks the
	mutex, it does not need to enter kernel and do lots of work to resume
	mutex waiters, in some cases, this saves lots of syscall overheads for
	mutex owner.

In my practice, sometimes LIBPTHREAD_YIELDLOOPS can massively improve performance
than LIBPTHREAD_SPINLOOPS, this depends on application. These two environments
are global to all pthread mutex, there is no interface to set them for each
pthread mutex, the default values are zero, this means spinning is turned off
by default.
 2007-10-30 05:57:37 +00:00
Kris Kennaway
2017a7cdfe Add a new "non-portable" mutex type, PTHREAD_MUTEX_ADAPTIVE_NP. This 
is also implemented in glibc and is used by a number of existing
applications (mysql, firefox, etc).

This mutex type is a default mutex with the additional property that
it spins briefly when attempting to acquire a contested lock, doing
trylock operations in userland before entering the kernel to block if
eventually unsuccessful.

The expectation is that applications requesting this mutex type know
that the mutex is likely to be only held for very brief periods, so it
is faster to spin in userland and probably succeed in acquiring the
mutex, than to enter the kernel and sleep, only to be woken up almost
immediately.  This can help significantly in certain cases when
pthread mutexes are heavily contended and held for brief durations
(such as mysql).

Spin up to 200 times before entering the kernel, which represents only
a few us on modern CPUs.  No performance degradation was observed with
this value and it is sufficient to avoid a large performance drop in
mysql performance in the heavily contended pthread mutex case.

The libkse implementation is a NOP.

Reviewed by:      jeff
MFC after:        3 days
 2007-10-29 21:01:47 +00:00
Ruslan Ermilov
886659fe14 - Stop calling libthr alternative as it's now the default 
threading library.

- Now that libpthread is a symlink, it's no longer possible
  to link applications with libpthread and have libmap.conf(5)
  select the desired threading library; applications will be
  linked to the default threading library, libkse or libthr.
  Remove an obsolete paragraph.

- Mention that improvements can be seen compared to libkse.

Reviewed by:	deischen, davidxu
 2007-10-22 10:13:38 +00:00
David Xu
5150e987d2 Use macro THR_CLEANUP_PUSH/POP, they are cheaper than pthread_cleanup_push/pop. 2007-10-16 07:46:15 +00:00
David Xu
286b41104d Reverse the logic of UP and SMP. 
Submitted by: jasone
 2007-10-16 07:36:02 +00:00
David E. O'Brien
946367b8e2 Tweak the handling of "WITHOUT_LIBPTHREAD". Also remove the accidental 
treatment of 'LIBKSE' as an "old style" knob.

Submitted by:	ru
Approved by:	re(kensmith)
 2007-10-09 23:31:11 +00:00
Ruslan Ermilov
948809b1ae Always install libpthread.* symlinks if at least one of 
the threading libraries is built.  This simplifies the
logic in makefiles that need to check if the pthreads
support is present.  It also fixes a bug where we would
build a threading library that we shouldn't have built:
for example, building with WITHOUT_LIBTHR and the default
value of DEFAULT_THREADING_LIB (libthr) would mistakenly
build the libthr library, but not install it.

Approved by:	re (kensmith)
 2007-10-01 18:29:55 +00:00
David Xu
4aa80591b6 Output error message to STDERR_FILENO. 
Approved by: re (bmah)
 2007-08-07 04:50:14 +00:00
David Xu
44a31c2d7f Set warning level to 2. 2007-06-08 02:21:13 +00:00
Daniel Eischen
419ecd5dee Bump library versions in preparation for 7.0. 
Ok'd by:	kan
 2007-05-21 02:49:08 +00:00
Ruslan Ermilov
539e7a7770 Fix a logic bug I re-introduced in my patch I sent to Daniel 
that would cause the selected shared threading library to be
overwritten with its 32-bit version on amd64.

PR:		amd64/112509
 2007-05-18 12:25:48 +00:00
Daniel Eischen
683f4c0a40 Allow DEFAULT_THREAD_LIB to be set from /etc/src.conf. 
Submitted by:	ru
 2007-05-17 04:54:35 +00:00
Daniel Eischen
00fb440c1a Enable symbol versioning by default. Use WITHOUT_SYMVER to disable it. 
Warning, after symbol versioning is enabled, going back is not easy
(use WITHOUT_SYMVER at your own risk).

Change the default thread library to libthr.

There most likely still needs to be a version bump for at least the
thread libraries.  If necessary, this will happen later.
 2007-05-13 14:12:40 +00:00
David Xu
00784f8b10 backout experimental adaptive spinning mutex for product use. 2007-05-09 08:39:33 +00:00
Daniel Eischen
5f864214bb Use C comments since we now preprocess these files with CPP. 2007-04-29 14:05:22 +00:00
David Xu
6839e793cf If a thread who's name is being set is not the current thread, use macros 
THR_THREAD_LOCK and THR_THREAD_UNLOCK instead, this should fix wrong
lock level problem.

Bug reported by: ed dot maste at gmail dot com
 2007-04-05 07:20:31 +00:00
Warner Losh
fed32d7544 Remove 3rd clause, renumber, ok per email 2007-01-12 07:26:21 +00:00
David Xu
03779e5c2b Insert mutex at tail if it has highest ceiling. 2007-01-05 03:57:11 +00:00
David Xu
da20a63dbb Oops, don't corrupt the list. 2007-01-05 03:33:47 +00:00
David Xu
5470bb56fc Check if the PP mutex is recursive, if we have already locked it, place the 
mutex in right order sorted by priority ceiling.
 2007-01-05 03:29:15 +00:00
David Xu
74c751131b get LIBPTHREAD_ADAPTIVE_SPIN early, so it can be used for some global 
mutexes.
 2006-12-20 05:05:44 +00:00
David Xu
842a092b74 Check environment variable PTHREAD_ADAPTIVE_SPIN, if it is set, use 
it as a default spin cycle count.
 2006-12-20 04:43:34 +00:00
David Xu
d99f6dac14 - Remove variable _thr_scope_system, all threads are system scope. 
- Rename _thr_smp_cpus to boolean variable _thr_is_smp.
- Define CPU_SPINWAIT macro for each arch, only X86 supports it.
 2006-12-15 11:52:01 +00:00
David Xu
8a8178c010 Create inline function _thr_umutex_trylock2 to only try one atomic 
operation, if it is failed, we call syscall directly, this saves
one atomic operation per lock contention.
 2006-12-14 13:22:02 +00:00
David Xu
9e8a8aa551 Correctly check failed syscall. 2006-12-12 05:26:39 +00:00
David Xu
347126a2e2 Move checking for c_has_waiters into low level _thr_ucond_signal and 
_thr_ucond_broadcast, clear condition variable pointer in cancellation
info after returing from _thr_ucond_wait, since kernel has already
dropped the internal lock, so we don't need to unlock it in cancellation
handler again.
 2006-12-12 03:08:49 +00:00
David Xu
b774466b61 test cancel_pending to save a thr_wake call in some specical cases. 2006-12-06 00:15:35 +00:00
David Xu
a8a343d2e6 _thr_ucond_wait drops lock, we should pick it up again. 2006-12-05 23:46:11 +00:00
David Xu
3b8a017442 the c_has_waiters is lazily updated, temporarily disable the false 
alarm code.
 2006-12-05 07:23:58 +00:00
David Xu
4d617f2d10 Use ucond to implement barrier. 2006-12-05 06:54:25 +00:00
David Xu
670b44d65a Add _thr_ucond_init(). 2006-12-05 06:53:44 +00:00
David Xu
3ce4e91d4e Tweak _thr_cancel_leave_defer a bit to fix a possible race. 2006-12-05 05:01:57 +00:00
David Xu
3c61d00ab6 Fix typo, I was using a wrong header file, and the typo is not detected 
by compiler.
 2006-12-04 14:27:42 +00:00
David Xu
2bd2c90703 Use kernel provided userspace condition variable to implement pthread 
condition variable.
 2006-12-04 14:20:41 +00:00
David Xu
6f54e82927 If a thread was detached, return EINVAL instead, the error code 
is also returned by pthread_detach() if a thread was already
detached, the error code was already documented:

>    [EINVAL]	The implementation has detected that the value speci-
>		fied by thread does not refer to a joinable thread.
 2006-11-28 11:05:31 +00:00
Ruslan Ermilov
8af480aec1 - When building world WITHOUT_LIBPTHREAD, link libthr to libpthread. 
- Don't build ngctl(8) and cached(8) if threading libs aren't built.
- Fix various issues in a cached(8) makefile.
 2006-11-26 14:36:34 +00:00
David Xu
f08e1bf682 Eliminate atomic operations in thread cancellation functions, it should 
reduce overheads of cancellation points.
 2006-11-24 09:57:38 +00:00
David Xu
58c7bab332 Move code calculating new inherited priority into single function. 2006-11-11 13:33:47 +00:00
David Xu
5656b5fafa Don't inherit THR_FLAGS_NEED_SUSPEND for child process, child process 
only has one thread, setting the flag can cause the thread to be
suspended and no another thread will resume it.
 2006-10-14 13:40:08 +00:00
David Xu
8042f26d52 o Make _thr_umutex_init a function. 
o Eliminate unused parameter for some functions.
o Convert type of first parameter to void * for _thr_umtx_wait
  and _thr_umtx_wake.
 2006-10-13 22:31:00 +00:00
David Xu
0b90fa4ad0 Use type pthread_state for thread state. 2006-10-13 12:45:21 +00:00
David Xu
e6747c7ce1 use rtprio_thread system call to get or set thread priority. 2006-09-21 04:21:30 +00:00
David Xu
ddaf6689e3 Use return value of _thr_umutex_lock instead of using zero. 2006-09-08 09:29:14 +00:00
David Xu
bddd24cd9c Replace internal usage of struct umtx with umutex which can supports 
real-time if we want, no functionality is changed.
 2006-09-06 04:04:10 +00:00
David Xu
8549079365 Same as pthread_setschedparam, use sizeof(struct sched_param) instead. 2006-09-05 14:39:06 +00:00
David Xu
be0bfdd207 Pass correct parameter size. 2006-09-05 14:37:22 +00:00
Marcel Moolenaar
be2f4bda88 Stylize: avoid using a global register variable. 2006-09-01 21:01:11 +00:00
Marcel Moolenaar
cc79b334de Rename TLS_TP_OFFSET back to TP_OFFSET. The former clashes with rtld. 2006-09-01 06:36:00 +00:00
Marcel Moolenaar
8e61dbecfc Stylize. 2006-09-01 06:15:00 +00:00
Marcel Moolenaar
35ca217bf0 Stylize. 2006-08-31 23:31:18 +00:00
Marcel Moolenaar
9f7b8b0d3c TLS fixes: 
o  The TLS pointer (r2) points 0x7000 after the *end* of the TCB.
o  _rtld_allocate_tls() gets a pointer to the current TCB, not the
   current TLS pointer.
o  _rtld_free_tls() gets the size of the TCB structure.
 2006-08-31 19:16:47 +00:00
Marcel Moolenaar
91705de0c2 Fix harmless bug: sizeof(tcb) equals sizeof(void*) not sizeof(struct tcb). 
The argument is (currently) not used by _rtld_free_tls().
 2006-08-31 19:06:30 +00:00
Marcel Moolenaar
57c2251d5c o Set TP using inline assembly to avoid dead code elimination. 
o  Eliminate _tcb.
 2006-08-30 03:31:32 +00:00
David Xu
fd2b89c48c Remove unused file. 2006-08-29 13:01:23 +00:00
David Xu
215318a7a3 pthread_sigmask is in thr_sig.c, remove this file. 2006-08-28 12:29:54 +00:00
David Xu
6361212beb Kill unused files. 2006-08-28 05:01:31 +00:00
David Xu
8ab9d78b9d Use umutex APIs to implement pthread_mutex, member pp_mutexq is added 
into pthread structure to keep track of locked PTHREAD_PRIO_PROTECT mutex,
no real mutex code is changed, the mutex locking and unlocking code should
has same performance as before.
 2006-08-28 04:52:50 +00:00
David Xu
cf13ecda6a Add umutex APIs. 2006-08-28 04:47:27 +00:00
Ruslan Ermilov
2b46c64c9c Remove alpha left-overs. 2006-08-22 08:03:01 +00:00
David Xu
065dbdc130 Axe unused member field. 2006-08-08 05:04:43 +00:00
David Xu
6b73f08519 Get number of CPUs and ignore spin count on single processor machine. 2006-08-08 04:42:41 +00:00
David Xu
05c3a5eab4 1. Don't override underscore version of aio_suspend(), system(), 
wait(), waitpid() and usleep(), they are internal versions and
   should not be cancellation points.
2. Make wait3() as a cancellation point.
3. Move raise() and pause() into file thr_sig.c.
4. Add functions _sigsuspend, _sigwait, _sigtimedwait and _sigwaitinfo,
   remove SIGCANCEL bit in wait-set for those functions, the signal is
   used internally to implement thread cancellation.
 2006-07-25 12:50:05 +00:00
Xin LI
da84584390 Unexpand two TAILQ_FOREACH_SAFE cases. 
Ok'ed by:	davidxu
 2006-07-17 09:23:44 +00:00
David Xu
e2dc286c1c Caching scheduling policy and priority in userland, a critical but baddly 
written application is frequently changing thread priority for SCHED_OTHER
policy.
 2006-07-13 22:45:19 +00:00
David Xu
561a89f945 Use thr_setscheduler, thr_getscheduler and thr_setschedparam to implement 
pthread functions.
 2006-07-13 06:35:43 +00:00
David Xu
7b4f8f037f Use kernel facilities to support real-time scheduling. 2006-07-12 06:13:18 +00:00
David Xu
9bbc6c7f54 __error could be called too early before libthr is initialized, test 
this case and return global varible errno instead.
 2006-07-12 03:44:05 +00:00
David Xu
7fabe0b5cc Remove unused member. 2006-06-03 00:19:40 +00:00
David Xu
b971a73040 Remove unused member field m_queue. 2006-06-02 08:37:01 +00:00
Xin LI
631574e7dc Explicitly request pre-zeroed memory instead of memset'ing our 
own.

Ok'ed by:	davidxu
 2006-05-31 00:31:38 +00:00
David Xu
e92b415c5a Add symbol versions: FBSD_1.0 and FBSDprivate. 2006-05-11 07:02:52 +00:00
David Xu
0a5fa45560 s/long/int. 2006-04-27 08:25:13 +00:00
David Xu
245116cafc - Use same priority range returned by kernel's sched_get_priority_min() 
and sched_get_priority_max() syscalls.
- Remove unused fields from structure pthread_attr.
 2006-04-27 08:18:23 +00:00
David Xu
d96413eaa4 Remove multiple _get_curthread() calls. 2006-04-23 11:23:37 +00:00
Ruslan Ermilov
84e709f1f1 Install shared libpthread library into /lib; needed by some 
/sbin programs.
 2006-04-12 19:42:20 +00:00
David Xu
a97944597b Do not check validity of timeout if a mutex can be acquired immediately. 
Completly drop recursive mutex in pthread_cond_wait and restore recursive
after resumption. Reorganize code to make gcc to generate better code.
 2006-04-08 13:24:44 +00:00
David Xu
b7e118b1e0 Remove declaration of _thr_initial from MD header file, it is no longer 
needed.
 2006-04-04 03:35:26 +00:00
David Xu
7bd761788d Simplify _get_curthread() and _tcb_ctor because libc and rtld now 
already allocate thread pointer space in tls block for initial thread.
Only i386 and amd64 have been done, others still have to be tested.
 2006-04-04 03:26:06 +00:00
David Xu
37a6356bbe WARNS level 4 cleanup. 2006-04-04 02:57:49 +00:00
Dag-Erling Smørgrav
552585665b Fix prototype mismatch. 2006-03-28 21:46:55 +00:00
David Xu
9ad4b64459 Remove priority mutex code because it does not work correctly, 
to make it work, turnstile like mechanism to support priority
propagating and other realtime scheduling options in kernel
should be available to userland mutex, for the moment, I just
want to make libthr be simple and efficient thread library.

Discussed with: deischen, julian
 2006-03-27 23:50:21 +00:00
David Xu
649814dd6c Comment out -g compiler option, found by 'FreeBSD Build Options Survey'. 2006-03-27 05:58:58 +00:00
David Xu
d448272d3c Check cancellation state carefully to see we really need to call 
_pthread_testcancel(). Preserve errno in _thr_suspend_check().
 2006-03-26 01:57:03 +00:00
David Xu
efe33769b9 Don't cancel thread if it is in critical region. 2006-03-25 07:03:13 +00:00
David Xu
f656ae703e Only wake up writer if the lock is free. 2006-03-25 05:14:21 +00:00
David Xu
07c7c80074 Compile thr_rtld.c 2006-03-25 05:00:54 +00:00
David Xu
b6b894f66b Add locking support for rtld. 2006-03-25 04:49:07 +00:00
David Xu
c147998f53 set an upper limit for thread structures which can be allocated. 2006-03-24 04:34:06 +00:00
David Xu
6f79c82641 Set default contention scope to system. 2006-03-20 03:14:14 +00:00
Ruslan Ermilov
5740a2b62d Convert NO_PROFILE and NO_LIB32 to new style. 2006-03-18 21:37:05 +00:00
David Xu
d3de1dcae7 Remove mqueue and timer, now they are in librt. 2006-03-08 23:47:04 +00:00
Daniel Eischen
f4cd2a5b5c Add some more pthread stubs so that librt can use them. 
The thread jump table has been resorted, so you need to
keep libc, libpthread, and libthr in sync.

Submitted by:	xu
 2006-03-05 18:10:28 +00:00
David Xu
7b8797d300 Reimplement mutex_init to get rid of compile warning. 2006-02-28 06:06:19 +00:00
David Xu
b620798174 Disable POSIX SIGEV_THREAD notification support, soon we will have a common 
library which can be reused both for libthr and libpthread.
 2006-02-22 02:52:22 +00:00
David Xu
bab012a948 Read cycle count before sending signal, this fixes a userland thread 
suspension bug.

MFC after: 3 days
 2006-02-20 09:02:40 +00:00
David Xu
6f716c2f82 Rework last change of pthread_once, create a function _thr_once_init to 
reinitialize its internal locks.
 2006-02-15 23:05:03 +00:00
David Xu
c5d2fb8df7 After fork(), reinitialize internal locks for pthread_once(). 2006-02-15 13:41:02 +00:00
David Xu
8956297a57 Now, thread name is stored in kernel, userland no longer has to keep it. 2006-02-05 03:04:54 +00:00
David Xu
3f7dda33b7 use syscall thr_set_name to implement pthread_set_name_np. 2006-02-05 02:26:17 +00:00
David Xu
5f9df00649 Add missing symbol pthread_set_name_np. 2006-01-23 06:11:23 +00:00
David Xu
1c9db39d88 Eliminate unused code. 2006-01-16 05:33:48 +00:00
David Xu
add2da0db1 Enable mutex inheritance code in mutex_fork, I forgot to turn on it. 
while here, add some comments about process shared mutex.
 2006-01-14 11:33:43 +00:00
Jason Evans
90dc795234 Increase the number of spinlocks, since libc's malloc implementation is 
about to significantly increase the number of spinlocks used.

Approved by:	markm (mentor)
 2006-01-13 06:14:04 +00:00
Jason Evans
52828c0e9c In preparation for a new malloc implementation: 
* Add posix_memalign().

  * Move calloc() from calloc.c to malloc.c.  Add a calloc() implementation in
    rtld-elf in order to make the loader happy (even though calloc() isn't
    used in rtld-elf).

  * Add _malloc_prefork() and _malloc_postfork(), and use them instead of
    directly manipulating __malloc_lock.

Approved by:	phk, markm (mentor)
 2006-01-12 07:28:21 +00:00
David Xu
07a263153e The thr_new sysscall was already in libc, don't generate it. 2006-01-11 06:10:05 +00:00
David Xu
9572a73405 Use macro STATIC_LIB_REQUIRE to declare a symbol should be linked into 
static binary.
 2006-01-10 04:53:03 +00:00
David Xu
e35e2ebd24 Rescue pthread_set_name_np for compatible reason, remove unused code. 2006-01-09 08:07:22 +00:00
David Xu
a53747d8fe Tweak macro THR_LOCK_RELEASE a bit for non-PTHREAD_INVARIANTS case. 2006-01-09 07:32:22 +00:00
David Xu
4160cda0dc Return real detached state. 2006-01-09 03:59:51 +00:00
David Xu
1775714935 Fix a bug recently introduced, the _thread_active_count should be 
decreased if thread can not be created.
 2006-01-08 10:13:18 +00:00
David Xu
23db0a33f7 Allow background threads to be suspended. 2006-01-08 01:49:31 +00:00
David Xu
0d29c148eb Try to reduce total time needed for suspending all threads, 
first broadcast signals to all threads, then enter a wait loop.
 2006-01-08 01:48:51 +00:00
David Xu
d827aa478d Remove functions i386_get_gsbase and i386_set_gsbase, they were already 
in libc.
 2006-01-07 06:01:43 +00:00
David Xu
bc414752d3 Refine thread suspension code, now thread suspension is a blockable 
operation, the caller is blocked util target threads are really
suspended, also avoid suspending a thread when it is holding a
critical lock.
Fix a bug in _thr_ref_delete which tests a never set flag.
 2006-01-05 13:51:22 +00:00
David Xu
5131df80a5 1. Add SIGEV_THREAD notification for mq_notify. 
2. Reuse current timer code and abstract some common code to
   to support both timer and mqueue.
 2006-01-04 11:48:02 +00:00
David Xu
97986a2ea0 Remove in-progress wait code to sync with libpthread's behavior. 2006-01-03 13:30:23 +00:00
David Xu
e6262545cf Let _mutex_cv_lock call internal functiona mutex_lock_common. 2005-12-21 05:14:07 +00:00
David Xu
8429e73473 Hide umtx API symbols as well. 2005-12-21 03:53:29 +00:00
David Xu
cf905a1575 1. Retire macro SCLASS, instead simply use language keyword and 
put variables in thr_init.c.
2. Hide all global symbols which won't be exported.
 2005-12-21 03:14:06 +00:00
David Xu
7a65760923 Follow the mistake in libpthread, the first version name in libpthread 
is LIBTHREAD_1_0, but really it should be LIBPTHREAD_1_0.
Fix it so libmap.conf works again (it was broken by recent versioning
code in rtld_elf).
 2005-12-21 02:34:20 +00:00
David Xu
597dc824a0 Clear return code to zero if joiner successfully waited joinee. 
Bug reported by: jasone at connonware when using ports lang/onyx
MFC after: 3 days
 2005-12-19 03:20:55 +00:00
David Xu
df2cf82178 Update copyright. 2005-12-17 09:42:45 +00:00
David Xu
e6a9baa280 Remove unused _get_curthread() call. 2005-12-12 07:14:57 +00:00
David Xu
8f0371f19d Fix name compatible problem with POSIX standard. the sigval_ptr and 
sigval_int really should be sival_ptr and sival_int.
Also sigev_notify_function accepts a union sigval value but not a
pointer.
 2005-11-04 09:41:00 +00:00
David Xu
e89510b152 Remove a redundant _get_curthread() call. 2005-11-02 14:06:29 +00:00
David Xu
7f838bf429 In raise(), use a shortcut to directly send signal to current thread. 2005-11-02 13:52:48 +00:00
David Xu
bff49d66ab Fix some comments, eliminate a memory leak. 2005-11-01 13:05:47 +00:00
David Xu
6cae59b1e7 Use TIMERS_UNLOCK. 2005-11-01 07:05:32 +00:00
David Xu
53bbdf8646 Add code to handle timer_delete(). The timer wrapper code is completely 
rewritten, now timers created with same sigev_notify_attributes will
run in same thread, this allows user to organize which timers can
run in same thread to save some thread resource.
 2005-11-01 06:53:22 +00:00
David Xu
7a81302ce7 Add thread exit handler in timer_loop to handle broken buggy code which 
could lead to memory leak.
 2005-10-30 23:59:01 +00:00
David Xu
4a050d016e Add timer_create wrapper. 2005-10-30 03:16:30 +00:00
David Xu
c09df63bb9 Remove unused variable. 
Reviewed by: cognet
 2005-10-29 13:40:31 +00:00
David Xu
babdcc8d78 Kill unused variable declaration. 2005-10-29 03:08:43 +00:00
David Xu
55ac4c3523 Link libthr to libpthread on Alpha and Sparc. 2005-10-27 10:21:23 +00:00
David Xu
07b6889426 Add experiment code to implement POSIX timer's SIGEV_THREAD notification. 2005-10-26 11:08:32 +00:00
David Xu
d7f119abd5 Follow the change in kernel, joiner thread just waits at thread id 
address, let kernel wake it up.
 2005-10-26 07:11:43 +00:00