Commit Graph

33 Commits

Author SHA1 Message Date
deischen
9dcd92a867 When reinitializing a lockuser, don't assume that the lock is in
use.  If it is in use, use the watched request, otherwise use the
lockuser's own request.  Only allocate a lockuser request if both
requests are null.

PR:	119920
Tested by (6.x):	Landon Fuller <landonf -at- bikemonkey -dot- org>
2008-01-31 19:38:26 +00:00
deischen
8cf2d070a8 Remove hacks to allow libkse to export its symbols in the LIBTHREAD_1_0
version namespace which was needed before the library version was
bumped.
2007-12-16 23:29:57 +00:00
deischen
f1ac56b04d WARNS=3'ify. 2007-11-30 17:20:29 +00:00
jasone
21bb948195 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
deischen
cc69a08fbf Add compatibility symbol maps. libpthread (.so.1 and .so.2)
used LIBTHREAD_1_0 as its version definition, but now needs
to define its symbols in the same namespace used by libc.
The compatibility hooks allows you to use libraries and
binaries built and linked to libpthread before libc was
built with symbol versioning.  The shims can be removed if
libpthread is given a version bump.

Reviewed by:	davidxu
2006-03-13 00:59:51 +00:00
deischen
46ccea61c3 Catch up with the atomic_FOO_ptr() changes and silence a few warnings. 2005-07-29 21:06:09 +00:00
delphij
55c4c85b99 Change the spin lock logic to a reasonable one. We should spin when
the lock is held by other thread, but not when nobody owns it.  According
to deischen@, this part of code will never be hit in our threads
library, since it does not use locks without wait/wakeup functions.

Spotted by:	mingyanguo via ChinaUnix.net forum
Reviewed by:	deischen
2005-02-27 17:45:55 +00:00
deischen
a5b13ff571 Use a generic way to back threads out of wait queues when handling
signals instead of having more intricate knowledge of thread state
within signal handling.

Simplify signal code because of above (by David Xu).

Use macros for libpthread usage of pthread_cleanup_push() and
pthread_cleanup_pop().  This removes some instances of malloc()
and free() from the semaphore and pthread_once() implementations.

When single threaded and forking(), make sure that the current
thread's signal mask is inherited by the forked thread.

Use private mutexes for libc and libpthread.  Signals are
deferred while threads hold private mutexes.  This fix also
breaks www/linuxpluginwrapper; a patch that fixes it is at
http://people.freebsd.org/~deischen/kse/linuxpluginwrapper.diff

Fix race condition in condition variables where handling a
signal (pthread_kill() or kill()) may not see a wakeup
(pthread_cond_signal() or pthread_cond_broadcast()).

In collaboration with:	davidxu
2004-12-18 18:07:37 +00:00
deischen
573b809044 Add the ability to reinitialize libpthread's internal FIFO-queueing
locks.

Reviewed by:	davidxu
2003-11-04 20:01:38 +00:00
davidxu
bde7cb88e1 Only generate code for _LCK_ASSERT if _LCK_DEBUG is defined. 2003-10-02 03:24:26 +00:00
deischen
919bc52171 Don't assume sizeof(long) = sizeof(int) on x86; use int
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
2003-09-03 17:56:26 +00:00
marcel
8ff698074b Move the machine specific files from sys/Makefile.inc and put them
in a machine specific makefile. While here, sort the sub-directories
in Makefile and remove _atomic_lock.S from all makefiles.
2003-06-23 04:28:31 +00:00
kan
a22cad65cc Attempt to eliminate PLT relocations from rwlock aquire/release
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)
2003-05-30 00:21:52 +00:00
deischen
dc5114efb5 Change low-level locking a bit so that we can tell if
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)
2003-05-24 02:29:25 +00:00
deischen
7f206ad4bb Add a method of yielding the current thread with the scheduler
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)
2003-05-16 19:58:30 +00:00
deischen
3cb9ba9e43 Protect against a race between granting a lock and accessing
other parts of the lock.

Submitted by:	davidxu
2003-05-04 22:29:09 +00:00
deischen
f8027ceb95 Protect thread errno from being changed while operating
on behalf of the KSE.

Add a kse_reinit function to reinitialize a reused KSE.

Submitted by:	davidxu
2003-04-23 21:46:50 +00:00
deischen
d729efd111 Sorry folks; I accidentally committed a patch from what I was working
on a couple of days ago.  This should be the most recent changes.

Noticed by:	davidxu
2003-04-18 07:09:43 +00:00
deischen
e68f624d87 Add FIFO queueing locking operations based on atomic swap.
Modify thread errno for the new libpthread changes.

Reviewed by:	davidxu
2003-04-18 05:02:39 +00:00
fjoe
52bbb9400b remove #ifdef _THREAD_SAFE 2003-01-24 01:46:30 +00:00
mini
ee4068ef29 Use KSE to schedule threads. 2002-10-30 06:07:18 +00:00
mini
a116d71409 Make the changes needed for libpthread to compile in its new home.
The new libpthread will provide POSIX threading support using KSE.
These files were previously repo-copied from src/lib/libc_r.

Reviewed by:	deischen
Approved by:	-arch
2002-09-16 08:45:36 +00:00
peter
76f0c923fe $Id$ -> $FreeBSD$ 1999-08-28 00:22:10 +00:00
deischen
3999d50769 Add RCS IDs to those files without them.
Fix copyrights (s/REGENTS/AUTHOR).

Suggested by:	tg
Approved by:	jb
1999-08-05 12:15:30 +00:00
jb
0b5bef5fb7 Change the name of this source file so that libc_r builds it instead
of the one in libc that contains the weak symbol for __error. FreeBSD's
make accumulates paths to the point that it can find *anything*, possibly
including the car keys.
1998-04-30 09:04:10 +00:00
jb
338768eab3 Add spinlock. 1998-04-29 11:03:34 +00:00
jb
f4c65c7dd6 Use libc makefiles from now on instead of duplicating them in libc_r.
Added Id strings too. It's useful to know who last made a change.
1997-05-03 03:57:21 +00:00
alex
70149f12e3 Sync with libc.
Submitted by:	John Birrell <jb@cimlogic.com.au>
1996-12-29 03:04:08 +00:00
julian
2e80ac2e78 Submitted by: john birell (jb@cimlogic.com.au)
fixups for makefiles
and for Thread-safe sycalls
1996-08-22 04:25:09 +00:00
julian
7350d1d3b2 Submitted by: John Birrell <cimaxp1!jb@werple.net.au>
Here are the diffs for libc_r to get it one step closer to P1003.1c
These make most of the thread/mutex/condvar structures opaque to the
user. There are three functions which have been renamed with _np
suffixes because they are extensions to P1003.1c (I did them for JAVA,
which needs to suspend/resume threads and also start threads suspended).

I've created a new header (pthread_np.h) for the non-POSIX stuff.

The egrep tags stuff in /usr/src/lib/libc_r/Makefile that I uncommented
doesn't work. I think its best to delete it. I don't think libc_r needs
tags anyway, 'cause most of the source is in libc which does have tags.

also:

Here's the first batch of man pages for the thread functions.
The diff to /usr/src/lib/libc_r/Makefile removes some stuff that was
inherited from /usr/src/lib/libc/Makefile that should only be done with
libc.

also:

I should have sent this diff with the pthread(3) man page.
It allows people to type

make -DWANT_LIBC_R world

to get libc_r built with the rest of the world. I put this in the
pthread(3) man page.  The default is still not to build libc_r.


also:
The diff attached adds a pthread(3) man page to /usr/src/share/man/man3.
The idea is that without libc_r installed, this man page will give people
enough info to know that they have to build libc_r.
1996-08-20 08:22:01 +00:00
wosch
9f795376b3 `mv'' -> `mv -f''
``rm'' -> ``rm -f''
so mv/rm may not ask for confirmation if you are not root
1996-05-07 23:19:49 +00:00
peter
63279fb570 Sync libc_r with libc changes.. 1996-05-05 08:22:20 +00:00
julian
529743d354 Reviewed by: julian
Submitted by:	 john birrel

One version of the pthreads library
another will follow with differnt actions under some cases..
not QUITE complete
1996-01-22 00:23:58 +00:00