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Diffstat (limited to 'sysdeps/mach/pagecopy.h')
| -rw-r--r-- | sysdeps/mach/pagecopy.h | 36 |
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> |