61955ab830
fork. (On my machine, fork is about 240usecs, vfork is 78usecs.) Implement rfork(!RFPROC !RFMEM), which allows a thread to divorce its memory from the other threads of a group. Implement rfork(!RFPROC RFCFDG), which closes all file descriptors, eliminating possible existing shares with other threads/processes. Implement rfork(!RFPROC RFFDG), which divorces the file descriptors for a thread from the rest of the group. Fix the case where a thread does an exec. It is almost nonsense for a thread to modify the other threads address space by an exec, so we now automatically divorce the address space before modifying it.
106 lines
4.7 KiB
C
106 lines
4.7 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vm_extern.h 8.2 (Berkeley) 1/12/94
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* $Id: vm_extern.h,v 1.33 1997/04/07 07:16:04 peter Exp $
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*/
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#ifndef _VM_EXTERN_H_
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#define _VM_EXTERN_H_
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struct buf;
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struct proc;
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struct vmspace;
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struct vmtotal;
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struct mount;
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struct vnode;
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#ifdef KERNEL
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#ifdef TYPEDEF_FOR_UAP
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int getpagesize __P((struct proc * p, void *, int *));
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int madvise __P((struct proc *, void *, int *));
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int mincore __P((struct proc *, void *, int *));
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int mprotect __P((struct proc *, void *, int *));
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int msync __P((struct proc *, void *, int *));
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int munmap __P((struct proc *, void *, int *));
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int obreak __P((struct proc *, void *, int *));
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int sbrk __P((struct proc *, void *, int *));
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int smmap __P((struct proc *, void *, int *));
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int sstk __P((struct proc *, void *, int *));
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int swapon __P((struct proc *, void *, int *));
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#endif
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void faultin __P((struct proc *p));
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int grow __P((struct proc *, u_int));
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int kernacc __P((caddr_t, int, int));
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vm_offset_t kmem_alloc __P((vm_map_t, vm_size_t));
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vm_offset_t kmem_alloc_pageable __P((vm_map_t, vm_size_t));
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vm_offset_t kmem_alloc_wait __P((vm_map_t, vm_size_t));
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void kmem_free __P((vm_map_t, vm_offset_t, vm_size_t));
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void kmem_free_wakeup __P((vm_map_t, vm_offset_t, vm_size_t));
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void kmem_init __P((vm_offset_t, vm_offset_t));
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vm_offset_t kmem_malloc __P((vm_map_t, vm_size_t, boolean_t));
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vm_map_t kmem_suballoc __P((vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t, boolean_t));
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void munmapfd __P((struct proc *, int));
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int pager_cache __P((vm_object_t, boolean_t));
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int swaponvp __P((struct proc *, struct vnode *, dev_t , u_long));
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void swapout_procs __P((void));
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int useracc __P((caddr_t, int, int));
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int vm_fault __P((vm_map_t, vm_offset_t, vm_prot_t, int));
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void vm_fault_copy_entry __P((vm_map_t, vm_map_t, vm_map_entry_t, vm_map_entry_t));
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void vm_fault_unwire __P((vm_map_t, vm_offset_t, vm_offset_t));
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int vm_fault_wire __P((vm_map_t, vm_offset_t, vm_offset_t));
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int vm_fault_user_wire __P((vm_map_t, vm_offset_t, vm_offset_t));
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void vm_fork __P((struct proc *, struct proc *, int));
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int vm_mmap __P((vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, vm_prot_t, int, caddr_t, vm_ooffset_t));
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vm_offset_t vm_page_alloc_contig __P((vm_offset_t, vm_offset_t, vm_offset_t, vm_offset_t));
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void vm_set_page_size __P((void));
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void vmmeter __P((void));
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struct vmspace *vmspace_alloc __P((vm_offset_t, vm_offset_t, int));
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struct vmspace *vmspace_fork __P((struct vmspace *));
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void vmspace_exec __P((struct proc *));
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void vmspace_unshare __P((struct proc *));
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void vmspace_free __P((struct vmspace *));
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void vnode_pager_setsize __P((struct vnode *, vm_ooffset_t));
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void vnode_pager_umount __P((struct mount *));
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void vnode_pager_uncache __P((struct vnode *, struct proc *));
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void vslock __P((caddr_t, u_int));
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void vsunlock __P((caddr_t, u_int, int));
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void vm_object_print __P((/* db_expr_t */ int, boolean_t, /* db_expr_t */ int,
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char *));
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void vm_fault_quick __P((caddr_t v, int prot));
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#endif /* KERNEL */
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#endif /* !_VM_EXTERN_H_ */
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