Commit Graph

15 Commits

Author SHA1 Message Date
alfred
e7efcb5302 add pthread_cancel, obtained from OpenBSD.
eischen (Daniel Eischen) added wrappers to protect against cancled
threads orphaning internal resources.

the cancelability code is still a bit fuzzy but works for test
programs of my own, OpenBSD's and some examples from ORA's books.

add readdir_r to both libc and libc_r

add some 'const' attributes to function parameters

Reviewed by: eischen, jasone
1999-11-28 05:38:13 +00:00
peter
d4e3ebaf0a $Id$ -> $FreeBSD$ 1999-08-27 23:45:13 +00:00
rse
39fb552a02 Cleanups to the pthread header files.
Submitted by:   Ralf S. Engelschall <rse@engelschall.com>
Reviewed by:    John Birrell <jb@cimlogic.com.au>
1999-07-31 08:36:07 +00:00
deischen
7d55c97821 Hide pthread cancellation routines behind #ifdef NOT_YET. They are
not currently supported.  Also corrected the declaration for
pthread_testcancel which incorrectly returned int when POSIX and
SUSv2 both say it should be void.

Submitted by:	Ralf S. Engelschall <rse@engelschall.com>
Reviewed by:	John Birrell <jb@freebsd.org>
1999-07-27 03:29:01 +00:00
jb
e071fcc31a o Runnable threads are now maintained in priority queues. The
implementation requires two things:

      1.) The priority queues must be protected during insertion
          and removal of threads.  Since the kernel scheduler
          must modify the priority queues, a spinlock for
          protection cannot be used.   The functions
          _thread_kern_sched_defer() and _thread_kern_sched_undefer()
          were added to {un}defer kernel scheduler activation.

      2.) A thread (active) priority change can be performed only
          when the thread is removed from the priority queue.  The
          implementation uses a threads active priority when
          inserting it into the queue.

    A by-product is that thread switches are much faster.  A
    separate queue is used for waiting and/or blocked threads,
    and it is searched at most 2 times in the kernel scheduler
    when there are active threads.  It should be possible to
    reduce this to once by combining polling of threads waiting
    on I/O with the loop that looks for timed out threads and
    the minimum timeout value.

  o Functions to defer kernel scheduler activation were added.  These
    are _thread_kern_sched_defer() and _thread_kern_sched_undefer()
    and may be called recursively.  These routines do not block the
    scheduling signal, but latch its occurrence.  The signal handler
    will not call the kernel scheduler when the running thread has
    deferred scheduling, but it will be called when running thread
    undefers scheduling.

  o Added support for _POSIX_THREAD_PRIORITY_SCHEDULING.  All the
    POSIX routines required by this should now be implemented.
    One note, SCHED_OTHER, SCHED_FIFO, and SCHED_RR are required
    to be defined by including pthread.h.  These defines are currently
    in sched.h.  I modified pthread.h to include sched.h but don't
    know if this is the proper thing to do.

  o Added support for priority protection and inheritence mutexes.
    This allows definition of _POSIX_THREAD_PRIO_PROTECT and
    _POSIX_THREAD_PRIO_INHERIT.

  o Added additional error checks required by POSIX for mutexes and
    condition variables.

  o Provided a wrapper for sigpending which is marked as a hidden
    syscall.

  o Added a non-portable function as a debugging aid to allow an
    application to monitor thread context switches.  An application
    can install a routine that gets called everytime a thread
    (explicitly created by the application) gets context switched.
    The routine gets passed the pthread IDs of the threads that are
    being switched in and out.  I found this useful, but we can
    get rid of it if you want.

Submitted by: Dan Eischen <eischen@vigrid.com>
1999-03-23 05:11:30 +00:00
eivind
083b0d7688 Add support for pthread_mutexattr_settype(). As a side effect of
testing this, fix MUTEX_TYPE_COUNTING_FAST.  Recursive locks now work.
1998-11-28 23:52:58 +00:00
alex
fe02148d3f Implement pthread read/write locks as defined by Version 2 of the Single
UNIX Specification.

As with our standard mutexes, process shared locks are not supported at
this time.
1998-09-07 19:01:43 +00:00
jb
0982c14667 Add static initializer defines as specified by POSIX. 1998-04-04 10:59:42 +00:00
alex
370393763b Changed pthread_detach to conform to POSIX, i.e. the single argument
provided is of type pthread_t instead of pthread_t *.

PR:		4320

Return EINVAL instead of ESRCH if attempting to detach an already
detached thread.
1997-12-25 05:07:20 +00:00
bde
173bd2da2e Fixed missing __P() to complete the K&R support in this header. 1997-05-07 00:58:23 +00:00
alex
2194c5e96a Comment out _POSIX_THREAD_PRIORITY_SCHEDULING since it's not supported
at this time.

Reviewed by:	John Birrell <jb@cimlogic.com.au>
1997-03-04 01:30:50 +00:00
julian
c2f7c3e489 Submitted by: John Birrell
uthreads update from the author.
1997-02-05 23:26:09 +00:00
hsu
4b9077f2b9 Moved pthread_mutexattr_default inside #ifndef PTHREAD_KERNEL now that
we use it in the uthreads implementation.
Moved enum pthread_mutextype here from libc_r/uthread/pthread_private.h.
Change prototype for pthread_getspecific().
1996-11-11 09:19:54 +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
julian
b7e7147a0b Submitted by: john birrel
Obtained from: uthread package

thrreads definitions
1996-01-22 00:24:56 +00:00