code.delx.au - gnu-emacs/blob - src/w32heap.h

   1 /* Heap management routines (including unexec) for GNU Emacs on Windows NT.
   2    Copyright (C) 1994 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 2, or (at your option)
   9 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; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.
  20
  21    Geoff Voelker (voelker@cs.washington.edu)                         7-29-94
  22 */
  23
  24 #ifndef NTHEAP_H_
  25 #define NTHEAP_H_
  26
  27 #include <windows.h>
  28
  29 /*
  30  * Heap related stuff.
  31  */
  32 #define get_reserved_heap_size()        reserved_heap_size
  33 #define get_committed_heap_size()       (get_data_end () - get_data_start ())
  34 #define get_heap_start()                get_data_start ()
  35 #define get_heap_end()                  get_data_end ()
  36 #define get_page_size()                 sysinfo_cache.dwPageSize
  37 #define get_allocation_unit()           sysinfo_cache.dwAllocationGranularity
  38 #define get_processor_type()            sysinfo_cache.dwProcessorType
  39 #define get_w32_major_version()         w32_major_version
  40 #define get_w32_minor_version()         w32_minor_version
  41
  42 extern unsigned char *get_data_start();
  43 extern unsigned char *get_data_end();
  44 extern unsigned long  data_region_size;
  45 extern unsigned long  reserved_heap_size;
  46 extern SYSTEM_INFO    sysinfo_cache;
  47 extern BOOL           need_to_recreate_heap;
  48 extern int            w32_major_version;
  49 extern int            w32_minor_version;
  50
  51 enum {
  52   OS_WIN95 = 1,
  53   OS_NT
  54 };
  55
  56 extern int os_subtype;
  57
  58 /* Emulation of Unix sbrk().  */
  59 extern void *sbrk (unsigned long size);
  60
  61 /* Recreate the heap created during dumping.  */
  62 extern void recreate_heap (char *executable_path);
  63
  64 /* Round the heap to this size.  */
  65 extern void round_heap (unsigned long size);
  66
  67 /* Load in the dumped .bss section.  */
  68 extern void read_in_bss (char *name);
  69
  70 /* Map in the dumped heap.  */
  71 extern void map_in_heap (char *name);
  72
  73 /* Cache system info, e.g., the NT page size.  */
  74 extern void cache_system_info (void);
  75
  76 /* Round ADDRESS up to be aligned with ALIGN.  */
  77 extern unsigned char *round_to_next (unsigned char *address,
  78                                      unsigned long align);
  79
  80 /* Report a fatal error during dumped heap management.  */
  81 void w32_fatal_reload_error (char *step);
  82
  83 /* ----------------------------------------------------------------- */
  84 /* Useful routines for manipulating memory-mapped files. */
  85
  86 typedef struct file_data {
  87     char          *name;
  88     unsigned long  size;
  89     HANDLE         file;
  90     HANDLE         file_mapping;
  91     unsigned char *file_base;
  92 } file_data;
  93
  94 #define OFFSET_TO_RVA(var,section) \
  95           (section->VirtualAddress + ((DWORD)(var) - section->PointerToRawData))
  96
  97 #define RVA_TO_OFFSET(var,section) \
  98           (section->PointerToRawData + ((DWORD)(var) - section->VirtualAddress))
  99
 100 #define RVA_TO_PTR(var,section,filedata) \
 101           ((void *)(RVA_TO_OFFSET(var,section) + (filedata).file_base))
 102
 103 int open_input_file (file_data *p_file, char *name);
 104 int open_output_file (file_data *p_file, char *name, unsigned long size);
 105 void close_file_data (file_data *p_file);
 106
 107 unsigned long get_section_size (PIMAGE_SECTION_HEADER p_section);
 108
 109 /* Return pointer to section header for named section. */
 110 IMAGE_SECTION_HEADER * find_section (char * name, IMAGE_NT_HEADERS * nt_header);
 111
 112 /* Return pointer to section header for section containing the given
 113    relative virtual address. */
 114 IMAGE_SECTION_HEADER * rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header);
 115
 116 #endif /* NTHEAP_H_ */