mach/mach_init.h

   1 /* Declarations and macros for the basic Mach things set at startup.
   2 Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   3 This file is part of the GNU C Library.
   4
   5 The GNU C Library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 License, or (at your option) any later version.
   9
  10 The GNU C Library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #ifndef _MACH_INIT_H
  21
  22 #define _MACH_INIT_H    1
  23
  24 #include <mach/mach_types.h>
  25
  26 /* Return the current task's task port.  */
  27 extern mach_port_t __mach_task_self (void);
  28 extern mach_port_t mach_task_self (void);
  29
  30 /* This cache is initialized at startup.  */
  31 extern mach_port_t __mach_task_self_;
  32 #define __mach_task_self()      (__mach_task_self_ + 0) /* Not an lvalue.  */
  33 #define mach_task_self()        (__mach_task_self ())
  34
  35 /* Kernel page size.  */
  36 extern vm_size_t __vm_page_size;
  37 extern vm_size_t vm_page_size;
  38
  39 /* Round the address X up to a page boundary.  */
  40 #define round_page(x)   \
  41   ((((vm_offset_t) (x) + __vm_page_size - 1) / __vm_page_size) * \
  42    __vm_page_size)
  43
  44 /* Truncate the address X down to a page boundary.  */
  45 #define trunc_page(x)   \
  46   ((((vm_offset_t) (x)) / __vm_page_size) * __vm_page_size)
  47
  48 #endif  /* mach_init.h */