gcc/hosthooks.h

   1 /* The host_hooks data structure.
   2    Copyright 2003, 2004 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 2, 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 COPYING.  If not, write to
  18 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  19 Boston, MA 02110-1301, USA.  */
  20
  21 #ifndef GCC_HOST_HOOKS_H
  22 #define GCC_HOST_HOOKS_H
  23
  24 struct host_hooks
  25 {
  26   void (*extra_signals) (void);
  27
  28   /* Identify an address that's likely to be free in a subsequent invocation
  29      of the compiler.  The area should be able to hold SIZE bytes.  FD is an
  30      open file descriptor if the host would like to probe with mmap.  */
  31   void * (*gt_pch_get_address) (size_t size, int fd);
  32
  33   /* ADDR is an address returned by gt_pch_get_address.  Attempt to allocate
  34      SIZE bytes at the same address and load it with the data from FD at
  35      OFFSET.  Return -1 if we couldn't allocate memory at ADDR, return 0
  36      if the memory is allocated but the data not loaded, return 1 if done.  */
  37   int (*gt_pch_use_address) (void *addr, size_t size, int fd, size_t offset);
  38
  39   /*  Return the alignment required for allocating virtual memory. Usually
  40       this is the same as pagesize.  */
  41   size_t (*gt_pch_alloc_granularity) (void);
  42
  43   /* Whenever you add entries here, make sure you adjust hosthooks-def.h.  */
  44 };
  45
  46 /* Each host provides its own.  */
  47 extern const struct host_hooks host_hooks;
  48
  49 #endif /* GCC_LANG_HOOKS_H */