Source

emacs / src / w32heap.h

/* Heap management routines (including unexec) for GNU Emacs on Windows NT.
   Copyright (C) 1994 Free Software Foundation, Inc.

   This file is part of GNU Emacs.

   GNU Emacs 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 2, or (at your option) any later
   version.

   GNU Emacs 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 GNU Emacs; see the file COPYING.  If not, write to the Free Software
   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

   Geoff Voelker (voelker@cs.washington.edu)			     7-29-94
*/

#ifndef NTHEAP_H_
#define NTHEAP_H_

#include <windows.h>

/*
 * Heap related stuff.
 */
#define get_data_region_base()		(char *) 0x00030000
#define get_reserved_heap_size()	(0x00d00000 - 0x00030000)
#define get_committed_heap_size()	(get_data_end () - get_data_start ())
#define get_heap_start()		get_data_start ()
#define get_heap_end()			get_data_end ()
#define get_page_size()			sysinfo_cache.dwPageSize
#define get_allocation_unit()		sysinfo_cache.dwAllocationGranularity
#define get_processor_type()		sysinfo_cache.dwProcessorType
#define get_nt_major_version()  	nt_major_version
#define get_nt_minor_version()  	nt_minor_version

extern unsigned char *get_data_start();
extern unsigned char *get_data_end();
extern unsigned long  data_region_size;
extern SYSTEM_INFO    sysinfo_cache;
extern BOOL   	      need_to_recreate_heap;
extern int    	      nt_major_version;
extern int    	      nt_minor_version;

/* Emulation of Unix sbrk().  */
extern void *sbrk (unsigned long size);

/* Recreate the heap created during dumping.  */
extern void recreate_heap (char *executable_path);

/* Round the heap to this size.  */
extern void round_heap (unsigned long size);

/* Load in the dumped .bss section.  */
extern void read_in_bss (char *name);

/* Map in the dumped heap.  */
extern void map_in_heap (char *name);

/* Cache system info, e.g., the NT page size.  */
extern void cache_system_info (void);

/* Round ADDRESS up to be aligned with ALIGN.  */
extern unsigned char *round_to_next (unsigned char *address, 
				     unsigned long align);

#endif /* NTHEAP_H_ */
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