hosthooks.h

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/* The host_hooks data structure.
   Copyright (C) 2003-2026 Free Software Foundation, Inc.
 
This file is part of GCC.
 
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
 
GCC 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 General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */
 
#ifndef GCC_HOST_HOOKS_H
#define GCC_HOST_HOOKS_H
 
struct host_hooks
{
  void (*extra_signals) (void);
 
  /* Identify an address that's likely to be free in a subsequent invocation
     of the compiler.  The area should be able to hold SIZE bytes.  FD is an
     open file descriptor if the host would like to probe with mmap.  */
  void * (*gt_pch_get_address) (size_t size, int fd);
 
  /* ADDR is an address returned by gt_pch_get_address.  Attempt to allocate
     SIZE bytes at the same address (preferably) or some other address
     and load it with the data from FD at OFFSET.  Return -1 if we couldn't
     allocate memory, otherwise update ADDR to the actual address where it got
     allocated, return 0 if the memory is allocated but the data not loaded,
     return 1 if done.  */
  int (*gt_pch_use_address) (void *&addr, size_t size, int fd, size_t offset);
 
  /*  Return the alignment required for allocating virtual memory. Usually
      this is the same as pagesize.  */
  size_t (*gt_pch_alloc_granularity) (void);
 
  /* Whenever you add entries here, make sure you adjust hosthooks-def.h.  */
};
 
/* Each host provides its own.  */
extern const struct host_hooks host_hooks;
 
#endif /* GCC_HOST_HOOKS_H */