src/lib/libc_r/uthread/uthread_kill.c, branch release/3.3.0_cvs

This commit was manufactured by cvs2svn to create tag

1999-09-16T08:26:13+00:00

'RELENG_3_3_0_RELEASE'.

This commit was manufactured to restore the state of the 3.3-RELEASE image.
Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs.

$Id$ -> $FreeBSD$

1999-08-29T15:04:30+00:00

MFC: Bring in both bug fixes, performance improvements, and enhancements

1999-07-23T13:00:35+00:00

(addition of wrapped poll).

This should fix MySQL problems.

MFC: (mostly) Realtime scheduling patches from Dan Eischen.

1999-05-09T07:48:53+00:00

Interrupt threads waiting in select etc.

1998-11-15T10:01:34+00:00

Submitted by: Alec Wolman

Implementation of an additional state called SIGWAIT (with the previous

1998-09-30T06:27:31+00:00

one renamed to SIGSUSPEND) to fix sigwait().

Submitted by: Daniel M. Eischen

Fix for sigwait problem.

1998-08-25T11:19:14+00:00

Submitted by: Daniel M. Eischen 
PR:           misc/7039

Change signal model to match POSIX (i.e. one set of signal handlers

1998-04-29T09:59:34+00:00

for the process, not a separate set for each thread). By default, the
process now only has signal handlers installed for SIGVTALRM, SIGINFO
and SIGCHLD. The thread kernel signal handler is installed for other
signals on demand. This means that SIG_IGN and SIG_DFL processing is now
left to the kernel, not the thread kernel.

Change the signal dispatch to no longer use a signal thread, and
call the signal handler using the stack of the thread that has the
signal pending.

Change the atomic lock method to use test-and-set asm code with
a yield if blocked. This introduces separate locks for each type
of object instead of blocking signals to prevent a context
switch. It was this blocking of signals that caused the performance
degradation the people have noted.

This is a *big* change!

Submitted by: John Birrell

1997-02-05T23:26:09+00:00

uthreads update from the author.