a020c74a8d
(fhandler_dev_zero::munmap): Ditto. (fhandler_dev_zero::msync): Ditto. (fhandler_dev_zero::fixup_mmap_after_fork): Ditto. * mmap.cc: Implement anonymous mapping using fhandler_dev_zero class. Implement private anonymous maps using VirtualAlloc/VirtualFree. Fix or add some more comments. (fh_paging_file): Change to type fhandler_dev_zero. (priv): New static inline function to avoid having lots of flag bit tests in the code. Use throughout were appropriate. (fixed): Ditto. (anonymous): Ditto. (noreserve): Ditto. (autogrow): Ditto. (gen_protect): Never generate PAGE_WRITECOPY protection for private anonymous maps. (gen_access): Drop FILE_MAP_EXECUTE handling since it's not supported correctly on 9x. (VirtualProt9x): Move comment from mmap64 here. (mmap_record::mmap_record): Gegerate correct device entry for anonymous maps, though unused right now. (mmap_record::priv): Call global priv function. (mmap_record::fixed): Call global fixed function. (mmap_record::anonymous): Call global anonymous function. (mmap_record::noreserve): Call global noreserve function. (mmap_record::autogrow): Call global autogrow function. (list::anonymous): New method. Use throughout were appropriate. (mmap_record::compatible_flags): Drop now useless ifdef. (mmap_record::alloc_page_map): Accomodate private anonymous maps. (mmap_record::map_pages): Accomodate MAP_NORESERVE mappings. (mmap_record::unmap_pages): Accomodate private anonymous maps. (mmap64): Simplify argument check. Don't remove the MAP_PRIVATE flag for anonymous mappings on 9x anymore since that's now handled gracefully. (mprotect): Accomodate MAP_NORESERVE mappings. Fix case when non-mmap areas are just MEM_RESERVEd. (fhandler_dev_zero::mmap): Implement anonymous mapping here. (fhandler_dev_zero::munmap): Ditto. (fhandler_dev_zero::msyn): Ditto. (fhandler_dev_zero::fixup_mmap_after_fork): Ditto. (fixup_mmaps_after_fork): Accomodate private anonymous maps. Enhance debug output in case VirtualProtect fails. * include/sys/mman.h: Really define MAP_NORESERVE now.
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/* sys/mman.h
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Copyright 1996, 1997, 1998, 2000, 2001 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _SYS_MMAN_H_
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#define _SYS_MMAN_H_
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#include <stddef.h>
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#include <sys/types.h>
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#define PROT_NONE 0
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define PROT_EXEC 4
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#define MAP_FILE 0
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#define MAP_SHARED 1
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#define MAP_PRIVATE 2
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#define MAP_TYPE 0xF
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#define MAP_FIXED 0x10
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#define MAP_ANONYMOUS 0x20
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#define MAP_ANON MAP_ANONYMOUS
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/* Non-standard flag */
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#define MAP_NORESERVE 0x4000 /* Don't reserve swap space for this mapping.
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Page protection must be set explicitely
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to access page. Only supported for anonymous
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private mappings. */
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#define MAP_AUTOGROW 0x8000 /* Grow underlying object to mapping size.
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File must be opened for writing. */
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#define MAP_FAILED ((void *)-1)
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/*
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* Flags for msync.
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*/
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#define MS_ASYNC 1
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#define MS_SYNC 2
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#define MS_INVALIDATE 4
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#ifndef __INSIDE_CYGWIN__
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extern void *mmap (void *__addr, size_t __len, int __prot, int __flags, int __fd, off_t __off);
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#endif
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extern int munmap (void *__addr, size_t __len);
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extern int mprotect (void *__addr, size_t __len, int __prot);
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extern int msync (void *__addr, size_t __len, int __flags);
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extern int mlock (const void *__addr, size_t __len);
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extern int munlock (const void *__addr, size_t __len);
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#ifdef __cplusplus
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};
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#endif /* __cplusplus */
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#endif /* _SYS_MMAN_H_ */
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