(setf aname (make-system-buffer length))
(alien-funcall afunc aname (addr length))))
(cast-and-free aname))))
+
+;; File mapping support routines
+(define-alien-routine (#!+sb-unicode "CreateFileMappingW"
+ #!-sb-unicode "CreateFileMappingA"
+ create-file-mapping)
+ handle
+ (handle handle)
+ (security-attributes (* t))
+ (protection dword)
+ (maximum-size-high dword)
+ (maximum-size-low dword)
+ (name (c-string #!+sb-unicode #!+sb-unicode :external-format :ucs-2)))
+
+(define-alien-routine ("MapViewOfFile" map-view-of-file)
+ system-area-pointer
+ (file-mapping handle)
+ (desired-access dword)
+ (offset-high dword)
+ (offset-low dword)
+ (size dword))
+
+(define-alien-routine ("UnmapViewOfFile" unmap-view-of-file) bool
+ (address (* t)))
+
+(define-alien-routine ("FlushViewOfFile" flush-view-of-file) bool
+ (address (* t))
+ (length dword))
+
+;; Constants for CreateFile `disposition'.
+(defconstant file-create-new 1)
+(defconstant file-create-always 2)
+(defconstant file-open-existing 3)
+(defconstant file-open-always 4)
+(defconstant file-truncate-existing 5)
+
+;; access rights
+(defconstant access-generic-read #x80000000)
+(defconstant access-generic-write #x40000000)
+(defconstant access-generic-execute #x20000000)
+(defconstant access-generic-all #x10000000)
+(defconstant access-file-append-data #x4)
+
+;; share modes
+(defconstant file-share-delete #x04)
+(defconstant file-share-read #x01)
+(defconstant file-share-write #x02)
+
+;; CreateFile (the real file-opening workhorse)
+(define-alien-routine (#!+sb-unicode "CreateFileW"
+ #!-sb-unicode "CreateFileA"
+ create-file)
+ handle
+ (name (c-string #!+sb-unicode #!+sb-unicode :external-format :ucs-2))
+ (desired-access dword)
+ (share-mode dword)
+ (security-attributes (* t))
+ (creation-disposition dword)
+ (flags-and-attributes dword)
+ (template-file handle))
+
+(defconstant file-attribute-readonly #x1)
+(defconstant file-attribute-hidden #x2)
+(defconstant file-attribute-system #x4)
+(defconstant file-attribute-directory #x10)
+(defconstant file-attribute-archive #x20)
+(defconstant file-attribute-device #x40)
+(defconstant file-attribute-normal #x80)
+(defconstant file-attribute-temporary #x100)
+(defconstant file-attribute-sparse #x200)
+(defconstant file-attribute-reparse-point #x400)
+(defconstant file-attribute-reparse-compressed #x800)
+(defconstant file-attribute-reparse-offline #x1000)
+(defconstant file-attribute-not-content-indexed #x2000)
+(defconstant file-attribute-encrypted #x4000)
+
+(defconstant file-flag-overlapped #x40000000)
+
+;; GetFileAttribute is like a tiny subset of fstat(),
+;; enough to distinguish directories from anything else.
+(define-alien-routine (#!+sb-unicode "GetFileAttributesW"
+ #!-sb-unicode "GetFileAttributesA"
+ get-file-attributes)
+ dword
+ (name (c-string #!+sb-unicode #!+sb-unicode :external-format :ucs-2)))
+
+(define-alien-routine ("CloseHandle" close-handle) bool
+ (handle handle))