src/w32heap.h

   1 /* Heap management routines (including unexec) for GNU Emacs on Windows NT.
   2    Copyright (C) 1994, 2001-2012  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
   9 (at 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 <http://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 #define get_reserved_heap_size()        reserved_heap_size
  31 #define get_committed_heap_size()       (get_data_end () - get_data_start ())
  32 #define get_heap_start()                get_data_start ()
  33 #define get_heap_end()                  get_data_end ()
  34
  35 extern unsigned char *get_data_start (void);
  36 extern unsigned char *get_data_end (void);
  37 extern size_t         reserved_heap_size;
  38 extern BOOL           using_dynamic_heap;
  39
  40 /* Emulation of Unix sbrk().  */
  41 extern void *sbrk (ptrdiff_t size);
  42
  43 /* Initialize heap structures for sbrk on startup.  */
  44 extern void init_heap (void);
  45
  46 /* Round the heap to this size.  */
  47 extern void round_heap (size_t size);
  48
  49 /* ----------------------------------------------------------------- */
  50 /* Useful routines for manipulating memory-mapped files. */
  51
  52 typedef struct file_data {
  53     char          *name;
  54     unsigned long  size;
  55     HANDLE         file;
  56     HANDLE         file_mapping;
  57     unsigned char *file_base;
  58 } file_data;
  59
  60 int open_input_file (file_data *p_file, char *name);
  61 int open_output_file (file_data *p_file, char *name, unsigned long size);
  62 void close_file_data (file_data *p_file);
  63
  64 /* Return pointer to section header for named section. */
  65 IMAGE_SECTION_HEADER * find_section (char * name, IMAGE_NT_HEADERS * nt_header);
  66
  67 /* Return pointer to section header for section containing the given
  68    relative virtual address. */
  69 IMAGE_SECTION_HEADER * rva_to_section (DWORD_PTR rva, IMAGE_NT_HEADERS * nt_header);
  70
  71 #endif /* NTHEAP_H_ */