src/w32heap.h

   1 /* Heap management routines (including unexec) for GNU Emacs on Windows NT.
   2    Copyright (C) 1994, 2001-2018 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs 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 3 of the License, or (at
   9 your option) any later version.
  10
  11 GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  18
  19    Geoff Voelker (voelker@cs.washington.edu)                         7-29-94
  20 */
  21
  22 #ifndef NTHEAP_H_
  23 #define NTHEAP_H_
  24
  25 #include <windows.h>
  26
  27 /*
  28  * Heap related stuff.
  29  */
  30
  31 extern unsigned char *get_data_start (void);
  32 extern unsigned char *get_data_end (void);
  33 extern size_t         reserved_heap_size;
  34 extern BOOL           using_dynamic_heap;
  35
  36 extern void *mmap_realloc (void **, size_t);
  37 extern void  mmap_free (void **);
  38 extern void *mmap_alloc (void **, size_t);
  39
  40 extern void report_temacs_memory_usage (void);
  41
  42 /* Emulation of Unix sbrk().  */
  43 extern void *sbrk (ptrdiff_t size);
  44
  45 /* Initialize heap structures for sbrk on startup.  */
  46 extern void init_heap (void);
  47
  48 /* ----------------------------------------------------------------- */
  49 /* Useful routines for manipulating memory-mapped files.  */
  50
  51 typedef struct file_data {
  52     char          *name;
  53     unsigned long  size;
  54     HANDLE         file;
  55     HANDLE         file_mapping;
  56     unsigned char *file_base;
  57 } file_data;
  58
  59 int open_input_file (file_data *p_file, char *name);
  60 int open_output_file (file_data *p_file, char *name, unsigned long size);
  61 void close_file_data (file_data *p_file);
  62
  63 /* Return pointer to section header for named section.  */
  64 IMAGE_SECTION_HEADER * find_section (const char *, IMAGE_NT_HEADERS *);
  65
  66 /* Return pointer to section header for section containing the given
  67    relative virtual address.  */
  68 IMAGE_SECTION_HEADER * rva_to_section (DWORD_PTR, IMAGE_NT_HEADERS *);
  69
  70 #endif /* NTHEAP_H_ */