/* Heap management routines (including unexec) for GNU Emacs on Windows NT.
   Copyright (C) 1994, 2001-2025 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 3 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.

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

#ifndef NTHEAP_H_
#define NTHEAP_H_

#include <windows.h>

/*
 * Heap related stuff.
 */

extern unsigned char *get_data_start (void);
extern unsigned char *get_data_end (void);
extern size_t         reserved_heap_size;

extern void *mmap_realloc (void **, size_t);
extern void  mmap_free (void **);
extern void *mmap_alloc (void **, size_t);

extern void report_temacs_memory_usage (void);

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

/* Initialize heap structures for sbrk on startup.  */
extern void init_heap (bool);

/* ----------------------------------------------------------------- */
/* Useful routines for manipulating memory-mapped files.  */

typedef struct file_data {
    char          *name;
    unsigned long  size;
    HANDLE         file;
    HANDLE         file_mapping;
    unsigned char *file_base;
} file_data;

int open_input_file (file_data *p_file, char *name);
int open_output_file (file_data *p_file, char *name, unsigned long size);
void close_file_data (file_data *p_file);

/* Return pointer to section header for named section.  */
IMAGE_SECTION_HEADER * find_section (const char *, IMAGE_NT_HEADERS *);

/* Return pointer to section header for section containing the given
   relative virtual address.  */
IMAGE_SECTION_HEADER * rva_to_section (DWORD_PTR, IMAGE_NT_HEADERS *);

#endif /* NTHEAP_H_ */
