diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/pagecopy.h')
| -rw-r--r-- | REORG.TODO/sysdeps/mach/pagecopy.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/pagecopy.h b/REORG.TODO/sysdeps/mach/pagecopy.h new file mode 100644 index 0000000000..4d9cb688d6 --- /dev/null +++ b/REORG.TODO/sysdeps/mach/pagecopy.h @@ -0,0 +1,32 @@ +/* Macros for copying by pages; used in memcpy, memmove. Mach version. + Copyright (C) 1995-2017 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))) |