| /* Macros for copying by pages; used in memcpy, memmove. |
| Copyright (C) 1995-2018 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/>. */ |
| |
| /* The macro PAGE_COPY_FWD_MAYBE defined in memcopy.h is used in memmove if the |
| PAGE_COPY_THRESHOLD macro is set to a non-zero value. The default is 0, |
| that is copying by pages is not implemented. |
| |
| System-specific pagecopy.h files that want to support page copying should |
| define these macros: |
| |
| PAGE_COPY_THRESHOLD |
| -- A non-zero minimum size for which virtual copying by pages is worthwhile. |
| |
| PAGE_SIZE |
| -- Size of a page. |
| |
| PAGE_COPY_FWD (dstp, srcp, nbytes_left, nbytes) |
| -- Macro to perform the virtual copy operation. |
| The pointers will be aligned to PAGE_SIZE bytes. |
| */ |
| |
| #define PAGE_COPY_THRESHOLD 0 |
