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Publish minor changes to readme and configure files in main directory. Main directory and code directory licence texts are now fully updated. Copied from Perforce Change: 196994
83 lines
3 KiB
C
83 lines
3 KiB
C
/* vm.h: VIRTUAL MEMORY INTERFACE
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*
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* $Id$
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* Copyright (c) 2014-2020 Ravenbrook Limited. See end of file for license.
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*/
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#ifndef vm_h
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#define vm_h
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#include "mpmtypes.h"
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/* VMStruct -- virtual memory structure
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*
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* Unlike most other datatypes we permit this structure to be moved
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* around in memory, and in particular, allocated temporarily on the
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* stack, to help with bootstrapping. Look for uses of VMCopy.
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*/
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#define VMSig ((Sig)0x519B3999) /* SIGnature VM */
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typedef struct VMStruct {
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Sig sig; /* <design/sig> */
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Size pageSize; /* operating system page size */
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void *block; /* unaligned base of mmap'd memory */
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Addr base, limit; /* aligned boundaries of reserved space */
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Size reserved; /* total reserved address space */
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Size mapped; /* total mapped memory */
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} VMStruct;
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#define VMPageSize(vm) RVALUE((vm)->pageSize)
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#define VMBase(vm) RVALUE((vm)->base)
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#define VMLimit(vm) RVALUE((vm)->limit)
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#define VMReserved(vm) RVALUE((vm)->reserved)
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#define VMMapped(vm) RVALUE((vm)->mapped)
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extern Size PageSize(void);
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extern Size (VMPageSize)(VM vm);
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extern Bool VMCheck(VM vm);
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extern Res VMParamFromArgs(void *params, size_t paramSize, ArgList args);
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extern Res VMInit(VM vmReturn, Size size, Size grainSize, void *params);
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extern void VMFinish(VM vm);
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extern Addr (VMBase)(VM vm);
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extern Addr (VMLimit)(VM vm);
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extern Res VMMap(VM vm, Addr base, Addr limit);
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extern void VMUnmap(VM vm, Addr base, Addr limit);
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extern Size (VMReserved)(VM vm);
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extern Size (VMMapped)(VM vm);
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extern void VMCopy(VM dest, VM src);
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#endif /* vm_h */
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2014-2020 Ravenbrook Limited <http://www.ravenbrook.com/>.
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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 are
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* met:
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*
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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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*
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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
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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