mach/mach_init.h

   1 /* Declarations and macros for the basic Mach things set at startup.
   2    Copyright (C) 1993-2024 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _MACH_INIT_H
  20
  21 #define _MACH_INIT_H    1
  22
  23 #include <mach/mach_types.h>
  24
  25 /* Return the current task's task port.  */
  26 extern mach_port_t __mach_task_self (void);
  27 extern mach_port_t mach_task_self (void);
  28
  29 /* This cache is initialized at startup.  */
  30 extern mach_port_t __mach_task_self_;
  31 #define __mach_task_self()      (__mach_task_self_ + 0) /* Not an lvalue.  */
  32 #define mach_task_self()        (__mach_task_self ())
  33
  34 /* This cache is initialized at startup.  */
  35 extern mach_port_t __mach_host_self_;
  36 #define __mach_host_self()      (__mach_host_self_ + 0) /* Not an lvalue.  */
  37 #define mach_host_self()        (__mach_host_self ())
  38
  39 /* Kernel page size.  */
  40 extern vm_size_t __vm_page_size;
  41 extern vm_size_t vm_page_size;
  42
  43 /* Round the address X up to a page boundary.  */
  44 #define round_page(x)   \
  45   ((((vm_offset_t) (x) + __vm_page_size - 1) / __vm_page_size) * \
  46    __vm_page_size)
  47
  48 /* Truncate the address X down to a page boundary.  */
  49 #define trunc_page(x)   \
  50   ((((vm_offset_t) (x)) / __vm_page_size) * __vm_page_size)
  51
  52 #endif  /* mach_init.h */