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| author | Corinna Vinschen <corinna@vinschen.de> | 2005-11-29 16:28:05 +0000 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2005-11-29 16:28:05 +0000 |
| commit | a020c74a8d0a0b3399530731a58530b5cbe5297b (patch) | |
| tree | 712ed3cdcb60499c2f7c99e10279934cbe4f905e /winsup/cygwin/include/sys/mman.h | |
| parent | f90e23f2714cb3173d57ee470f6fdc631561cd13 (diff) | |
| download | cygnal-a020c74a8d0a0b3399530731a58530b5cbe5297b.tar.gz cygnal-a020c74a8d0a0b3399530731a58530b5cbe5297b.tar.bz2 cygnal-a020c74a8d0a0b3399530731a58530b5cbe5297b.zip | |
* fhandler.h (fhandler_dev_zero::mmap): Add method.
(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.
Diffstat (limited to 'winsup/cygwin/include/sys/mman.h')
| -rw-r--r-- | winsup/cygwin/include/sys/mman.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/winsup/cygwin/include/sys/mman.h b/winsup/cygwin/include/sys/mman.h index d81e22215..f501b7b75 100644 --- a/winsup/cygwin/include/sys/mman.h +++ b/winsup/cygwin/include/sys/mman.h @@ -31,11 +31,10 @@ extern "C" { #define MAP_ANONYMOUS 0x20 #define MAP_ANON MAP_ANONYMOUS /* Non-standard flag */ -#if 0 /* Not yet implemented */ #define MAP_NORESERVE 0x4000 /* Don't reserve swap space for this mapping. Page protection must be set explicitely - to access page. */ -#endif + to access page. Only supported for anonymous + private mappings. */ #define MAP_AUTOGROW 0x8000 /* Grow underlying object to mapping size. File must be opened for writing. */ |