John Birrell b847980f15 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
..
arpa
protocols	64bit clean now	1998-11-08 08:27:16 +00:00
rpc	#ifdef out DES ioctls which don't exist in FreeBSD. These originated	1998-09-26 01:29:51 +00:00
rpcsvc	Make rcsid a const char[] instead of char[] to avoid compiler warnings	1998-12-06 08:15:08 +00:00
_ctype.h
a.out.h
ar.h
assert.h
bitstring.h
ctype.h
db.h
dirent.h
disktab.h
dlfcn.h
elf-hints.h	Add hints file structures and defines.	1998-09-05 00:53:53 +00:00
elf.h	Add hints file structures and defines.	1998-09-05 00:53:53 +00:00
err.h	Don't forget to use the appropriate __printf*like attribute for verr*	1998-11-22 05:12:27 +00:00
fnmatch.h
fstab.h
fts.h
glob.h
grp.h
histedit.h
ieeefp.h	Use __i386__ instead of i386 in an ifdef.	1999-03-05 18:15:05 +00:00
iso646.h
kvm.h	Removed evil typedef kvm_swap_t and all uses of it (not many).	1999-01-27 11:29:15 +00:00
limits.h
link.h
locale.h
Makefile	Nuke old copies of /usr/include/timepps.h	1999-03-22 12:58:15 +00:00
malloc.h
math.h
memory.h
mpool.h
ndbm.h
netdb.h
nl_types.h
nlist.h
objformat.h	Add a new library function getobjformat(). It checks all the	1998-09-09 01:21:25 +00:00
paths.h	Move nologin from /etc to /var/run. This means one less file that has	1999-01-11 09:07:42 +00:00
pthread_np.h	o Runnable threads are now maintained in priority queues. The	1999-03-23 05:11:30 +00:00
pthread.h	o Runnable threads are now maintained in priority queues. The	1999-03-23 05:11:30 +00:00
pwd.h	Use the correct type for uid and gid in struct passwd. Document it.	1999-01-18 02:14:20 +00:00
ranlib.h
regex.h
regexp.h
resolv.h	Remove the extern decl of ``h_errno''. It's already	1998-09-07 19:54:08 +00:00
rune.h
runetype.h
setjmp.h
sgtty.h
signal.h
stab.h
stddef.h
stdio.h	Added functions fseeko() and ftello() (from susv2).	1999-02-08 21:32:38 +00:00
stdlib.h	Little reorganization:	1998-12-19 00:02:34 +00:00
strhash.h
string.h	Add a prototype for strtok_r().	1999-01-20 21:21:26 +00:00
stringlist.h
strings.h
struct.h
sysexits.h
tar.h
time.h	Make ctime_r, asctime_r, gmtime_r, and localtime_r available in libc.	1999-01-04 20:45:20 +00:00
timers.h
ttyent.h
unistd.h	optreset is a POSIX extension, make it visible in POSIX_SOURCE scope.	1999-01-11 11:32:35 +00:00
utime.h
utmp.h
vis.h