src/lib/libkse/sys, branch release/7.0.0_cvs

This commit was manufactured by cvs2svn to create tag

2008-02-24T05:45:17+00:00

'RELENG_7_0_0_RELEASE'.

This commit was manufactured to restore the state of the 7.0-RELEASE image.

MFC changes from 1.14 for sys/lock.c and 1.127+1.128 for thread/thr_kern.c

2008-02-04T20:03:36+00:00

this copes with the fact that during a fork the child may get
really screwy state in the threading system due to the
sudden vaporisation of it's sibling threads.

Approved by: re(kensmith)

Add compatibility symbol maps. libpthread (.so.1 and .so.2)

2006-03-13T00:59:51+00:00

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

Catch up with the atomic_FOO_ptr() changes and silence a few warnings.

2005-07-29T21:06:09+00:00

Change the spin lock logic to a reasonable one. We should spin when

2005-02-27T17:45:55+00:00

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

Use a generic way to back threads out of wait queues when handling

2004-12-18T18:07:37+00:00

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

Add the ability to reinitialize libpthread's internal FIFO-queueing

2003-11-04T20:01:38+00:00

locks.

Reviewed by:	davidxu

Only generate code for _LCK_ASSERT if _LCK_DEBUG is defined.

2003-10-02T03:24:26+00:00

Don't assume sizeof(long) = sizeof(int) on x86; use int

2003-09-03T17:56:26+00:00

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

Move the machine specific files from sys/Makefile.inc and put them

2003-06-23T04:28:31+00:00

in a machine specific makefile. While here, sort the sub-directories
in Makefile and remove _atomic_lock.S from all makefiles.