1  /* Declarations and macros for the basic Mach things set at startup.
       2     Copyright (C) 1993-2023 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 */