text: /* Declarations and macros for the basic Mach things set at startup.
     Copyright (C) 1993-2015 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/>.  */
  
  #ifndef	_MACH_INIT_H
  
  #define	_MACH_INIT_H	1
  
  #include <mach/mach_types.h>
  
  /* Return the current task's task port.  */
  extern mach_port_t __mach_task_self (void);
  extern mach_port_t mach_task_self (void);
  
  /* This cache is initialized at startup.  */
  extern mach_port_t __mach_task_self_;
  #define __mach_task_self()	(__mach_task_self_ + 0)	/* Not an lvalue.  */
  #define mach_task_self()	(__mach_task_self ())
  
  /* Kernel page size.  */
  extern vm_size_t __vm_page_size;
  extern vm_size_t vm_page_size;
  
  /* Round the address X up to a page boundary.  */
  #define round_page(x)	\
    ((((vm_offset_t) (x) + __vm_page_size - 1) / __vm_page_size) * \
     __vm_page_size)
  
  /* Truncate the address X down to a page boundary.  */
  #define trunc_page(x)	\
    ((((vm_offset_t) (x)) / __vm_page_size) * __vm_page_size)
  
  #endif	/* mach_init.h */
  