1/* The host_hooks data structure.
2   Copyright 2003, 2004 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10
11GCC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING.  If not, write to
18the Free Software Foundation, 51 Franklin Street, Fifth Floor,
19Boston, MA 02110-1301, USA.  */
20
21#ifndef GCC_HOST_HOOKS_H
22#define GCC_HOST_HOOKS_H
23
24struct 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.  */
47extern const struct host_hooks host_hooks;
48
49#endif /* GCC_LANG_HOOKS_H */
50