SEO

i just committed the current rthreads code. this is a replacement for the
current userland thread library, libpthread. the kernel is made thread
aware and some syscalls are added to facilitate the userland library.

most of the kernel code is currently only enabled if you add RTHREADS to
the config file. it will probably remain this while for some time.

the userland library implements a subset of the pthreads API. it is
binary compatible, so it is possible to switch to it on the fly.
currently, only i386 and amd64 are supported. to add support for a new
arch, copy _atomic_lock from libpthread and write rfork_thread.

the new syscalls need to be stubbed into libc, there is a diff at the end
of this email.

there is still a lot of work to do. signals are hard. there are
functions missing from the library. but some quirks aside, i have
been using this code since may without incident.

quite a few more details about how everything fits together can be found
in the paper linked from events.html.

Index: Makefile.inc
================================================== =================
RCS file: /cvs/src/lib/libc/sys/Makefile.inc,v
retrieving revision 1.75
diff -u -r1.75 Makefile.inc
--- Makefile.inc 2005/11/29 21:29:15 1.75
+++ Makefile.inc 2005/12/03 18:26:10
@@ -57,7 +57,8 @@
sigaltstack.o socket.o socketpair.o stat.o statfs.o swapctl.o \
symlink.o sync.o sysarch.o umask.o unlink.o unmount.o \
utimes.o vadvise.o wait4.o write.o writev.o xfspioctl.o __semctl.o \
- __syscall.o __sysctl.o
+ __syscall.o __sysctl.o sched_yield.o getthrid.o thrsleep.o thrwakeup.o \
+ threxit.o thrsigdivert.o

GASM= ${ASM:.o=.go}
PASM= ${ASM:.o=.po}


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