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428
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1 /* Heap management routines (including unexec) for XEmacs on Windows NT.
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2 Copyright (C) 1994 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to the Free
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18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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19 02111-1307, USA.
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20
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21 Geoff Voelker (voelker@cs.washington.edu) 7-29-94 */
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22
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23 /* Adapted for XEmacs by David Hobley <david@spook-le0.cia.com.au> */
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24 /* Synced with FSF Emacs 19.34.6 by Marc Paquette <marcpa@cam.org> */
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25
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26 #ifndef NTHEAP_H_
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27 #define NTHEAP_H_
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28
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29 #include <windows.h>
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30
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31 /*
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32 * Heap related stuff.
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33 */
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34 #define get_reserved_heap_size() reserved_heap_size
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35 #define get_committed_heap_size() (get_data_end () - get_data_start ())
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36 #define get_heap_start() get_data_start ()
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37 #define get_heap_end() get_data_end ()
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38 #define get_page_size() sysinfo_cache.dwPageSize
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39 #define get_allocation_unit() sysinfo_cache.dwAllocationGranularity
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40 #define get_processor_type() sysinfo_cache.dwProcessorType
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41 #define get_nt_major_version() nt_major_version
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42 #define get_nt_minor_version() nt_minor_version
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43
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44 extern unsigned char *get_data_start();
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45 extern unsigned char *get_data_end();
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46 extern unsigned long data_region_size;
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47 extern unsigned long reserved_heap_size;
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48 extern SYSTEM_INFO sysinfo_cache;
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49 extern int nt_major_version;
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50 extern int nt_minor_version;
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51
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52 /* To prevent zero-initialized variables from being placed into the bss
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53 section, use non-zero values to represent an uninitialized state. */
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54 #define UNINIT_PTR ((void *) 0xF0A0F0A0)
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55 #define UNINIT_LONG (0xF0A0F0A0L)
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56
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57 enum {
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58 OS_WIN95 = 1,
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59 OS_NT
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60 };
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61
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62 extern int os_subtype;
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63
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64 /* Emulation of Unix sbrk(). */
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65 extern void *sbrk (unsigned long size);
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66
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67 /* Recreate the heap created during dumping. */
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68 extern void recreate_heap (char *executable_path);
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69
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70 /* Round the heap to this size. */
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71 extern void round_heap (unsigned long size);
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72
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73 /* Load in the dumped .bss section. */
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74 extern void read_in_bss (char *name);
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75
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76 /* Map in the dumped heap. */
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77 extern void map_in_heap (char *name);
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78
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79 /* Cache system info, e.g., the NT page size. */
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80 extern void cache_system_info (void);
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81
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82 /* Round ADDRESS up to be aligned with ALIGN. */
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83 extern unsigned char *round_to_next (unsigned char *address,
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84 unsigned long align);
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85
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86 /* ----------------------------------------------------------------- */
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87 /* Useful routines for manipulating memory-mapped files. */
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88
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89 typedef struct file_data {
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90 CONST char *name;
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91 unsigned long size;
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92 HANDLE file;
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93 HANDLE file_mapping;
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94 unsigned char *file_base;
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95 } file_data;
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96
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97 #define OFFSET_TO_RVA(var,section) \
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98 (section->VirtualAddress + ((DWORD)(var) - section->PointerToRawData))
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99
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100 #define RVA_TO_OFFSET(var,section) \
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101 (section->PointerToRawData + ((DWORD)(var) - section->VirtualAddress))
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102
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103 #define RVA_TO_PTR(var,section,filedata) \
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104 ((void *)(RVA_TO_OFFSET(var,section) + (filedata).file_base))
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105
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106 int open_input_file (file_data *p_file, CONST char *name);
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107 int open_output_file (file_data *p_file, CONST char *name, unsigned long size);
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108 void close_file_data (file_data *p_file);
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109
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110 #endif /* NTHEAP_H_ */
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