| /* Macros for copying by pages; used in memcpy, memmove. Mach version. |
| Copyright (C) 1995-2016 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))) |