* string/Makefile (distribute): Add pagecopy.h.

	* sysdeps/mach/pagecopy.h: New file.
	* sysdeps/generic/pagecopy.h: New file.
	* sysdeps/generic/memcpy.c: Include pagecopy.h; call
 	PAGE_COPY_FWD_MAYBE first when word aligned.
	* sysdeps/generic/memmove.c: Likewise.

1 files changed, 36 insertions, 0 deletions

diff --git a/sysdeps/mach/pagecopy.h b/sysdeps/mach/pagecopy.h
new file mode 100644
index 0000000000..e75c064f06
--- /dev/null
+++ b/sysdeps/mach/pagecopy.h
@@ -0,0 +1,36 @@
+/* Macros for copying by pages; used in memcpy, memmove.  Mach version.
+Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <mach.h>
+
+/* Threshold at which vm_copy is more efficient than well-optimized copying
+   by words.  This parameter should be tuned as necessary.  */
+#define PAGE_THRESHOLD		(2 * PAGE_SIZE)	/* XXX ? */
+
+#define PAGE_SIZE		__vm_page_size
+#define PAGE_COPY_FWD(dstp, srcp, nbytes_left, nbytes)			      \
+  ((nbytes_left) = ((nbytes) -						      \
+		    (__vm_copy (__mach_task_self (),			      \
+				(vm_address_t) srcp, trunc_page (nbytes),     \
+				(vm_address_t) dstp) == KERN_SUCCESS	      \
+		     ? trunc_page (nbytes)				      \
+		     : 0)))
+
+/* Get the generic macro.  */
+#include_next <pagecopy.h>