Date: Fri, 23 Feb 1996 10:49:27 -0800 (PST) From: Peter Wemm <peter> To: CVS-committers, cvs-all, cvs-sys Subject: cvs commit: src/sys/sys shm.h param.h filedesc.h src/sys/vm vm_extern.h vm_glue.c vm_mmap.c src/sys/kern kern_descrip.c kern_fork.c sysv_ipc.c sysv_shm.c Message-ID: <199602231849.KAA29307@freefall.freebsd.org>
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peter 96/02/23 10:49:26
Modified: sys/kern kern_descrip.c kern_fork.c sysv_ipc.c sysv_shm.c
sys/sys shm.h param.h filedesc.h
sys/vm vm_extern.h vm_glue.c vm_mmap.c
Log:
kern_descrip.c: add fdshare()/fdcopy()
kern_fork.c: add the tiny bit of code for rfork operation.
kern/sysv_*: shmfork() takes one less arg, it was never used.
sys/shm.h: drop "isvfork" arg from shmfork() prototype
sys/param.h: declare rfork args.. (this is where OpenBSD put it..)
sys/filedesc.h: protos for fdshare/fdcopy.
vm/vm_mmap.c: add minherit code, add rounding to mmap() type args where
it makes sense.
vm/*: drop unused isvfork arg.
Note: this rfork() implementation copies the address space mappings,
it does not connect the mappings together. ie: once the two processes
have split, the pages may be shared, but the address space is not. If one
does a mmap() etc, it does not appear in the other. This makes it not
useful for pthreads, but it is useful in it's own right for having
light-weight threads in a static shared address space.
Obtained from: Original by Ron Minnich, extended by OpenBSD
Revision Changes Path
1.26 +45 -1 src/sys/kern/kern_descrip.c
1.17 +61 -12 src/sys/kern/kern_fork.c
1.4 +2 -3 src/sys/kern/sysv_ipc.c
1.18 +2 -3 src/sys/kern/sysv_shm.c
1.8 +2 -2 src/sys/sys/shm.h
1.12 +17 -1 src/sys/sys/param.h
1.8 +3 -1 src/sys/sys/filedesc.h
1.24 +2 -2 src/sys/vm/vm_extern.h
1.40 +3 -7 src/sys/vm/vm_glue.c
1.36 +110 -17 src/sys/vm/vm_mmap.c
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