src/winsup/cygwin ChangeLog fhandler.h mmap.cc ...

[corinna at cygwin dot com]

CVSROOT:	/cvs/src
Module name:	src
Changes by:	corinna@sourceware.org	2005-11-29 16:28:06

Modified files:
	winsup/cygwin  : ChangeLog fhandler.h mmap.cc 
	winsup/cygwin/include/sys: mman.h 

Log message:
	* 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.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/ChangeLog.diff?cvsroot=src&r1=1.3218&r2=1.3219
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler.h.diff?cvsroot=src&r1=1.274&r2=1.275
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/mmap.cc.diff?cvsroot=src&r1=1.115&r2=1.116
http://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/include/sys/mman.h.diff?cvsroot=src&r1=1.9&r2=1.10