1  /* The host_hooks data structure.
       2     Copyright (C) 2003-2023 Free Software Foundation, Inc.
       3  
       4  This file is part of GCC.
       5  
       6  GCC is free software; you can redistribute it and/or modify
       7  it under the terms of the GNU General Public License as published by
       8  the Free Software Foundation; either version 3, or (at your option)
       9  any later version.
      10  
      11  GCC is distributed in the hope that it will be useful,
      12  but WITHOUT ANY WARRANTY; without even the implied warranty of
      13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14  GNU General Public License for more details.
      15  
      16  You should have received a copy of the GNU General Public License
      17  along with GCC; see the file COPYING3.  If not see
      18  <http://www.gnu.org/licenses/>.  */
      19  
      20  #ifndef GCC_HOST_HOOKS_H
      21  #define GCC_HOST_HOOKS_H
      22  
      23  struct host_hooks
      24  {
      25    void (*extra_signals) (void);
      26  
      27    /* Identify an address that's likely to be free in a subsequent invocation
      28       of the compiler.  The area should be able to hold SIZE bytes.  FD is an
      29       open file descriptor if the host would like to probe with mmap.  */
      30    void * (*gt_pch_get_address) (size_t size, int fd);
      31  
      32    /* ADDR is an address returned by gt_pch_get_address.  Attempt to allocate
      33       SIZE bytes at the same address (preferrably) or some other address
      34       and load it with the data from FD at OFFSET.  Return -1 if we couldn't
      35       allocate memory, otherwise update ADDR to the actual address where it got
      36       allocated, return 0 if the memory is allocated but the data not loaded,
      37       return 1 if done.  */
      38    int (*gt_pch_use_address) (void *&addr, size_t size, int fd, size_t offset);
      39  
      40    /*  Return the alignment required for allocating virtual memory. Usually
      41        this is the same as pagesize.  */
      42    size_t (*gt_pch_alloc_granularity) (void);
      43  
      44    /* Whenever you add entries here, make sure you adjust hosthooks-def.h.  */
      45  };
      46  
      47  /* Each host provides its own.  */
      48  extern const struct host_hooks host_hooks;
      49  
      50  #endif /* GCC_LANG_HOOKS_H */