mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
36 lines
1.5 KiB
C
36 lines
1.5 KiB
C
/* Macros for copying by pages; used in memcpy, memmove. Mach version.
|
|
Copyright (C) 1995-2014 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#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 <sysdeps/generic/pagecopy.h>
|