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 /* Emacs takes care of ensuring that these are defined.  */
  29 #ifdef max
  30 #undef max
  31 #undef min
  32 #endif
  33
  34 #define ROUND_UP(p, align)   (((DWORD)(p) + (align)-1) & ~((align)-1))
  35 #define ROUND_DOWN(p, align) ((DWORD)(p) & ~((align)-1))
  36
  37 /*
  38  * Heap related stuff.
  39  */
  40 #define get_reserved_heap_size()        reserved_heap_size
  41 #define get_committed_heap_size()       (get_data_end () - get_data_start ())
  42 #define get_heap_start()                get_data_start ()
  43 #define get_heap_end()                  get_data_end ()
  44 #define get_page_size()                 sysinfo_cache.dwPageSize
  45 #define get_allocation_unit()           sysinfo_cache.dwAllocationGranularity
  46 #define get_processor_type()            sysinfo_cache.dwProcessorType
  47 #define get_w32_major_version()         w32_major_version
  48 #define get_w32_minor_version()         w32_minor_version
  49
  50 extern unsigned char *get_data_start();
  51 extern unsigned char *get_data_end();
  52 extern unsigned long  reserved_heap_size;
  53 extern SYSTEM_INFO    sysinfo_cache;
  54 extern OSVERSIONINFO  osinfo_cache;
  55 extern BOOL           using_dynamic_heap;
  56 extern int            w32_major_version;
  57 extern int            w32_minor_version;
  58
  59 enum {
  60   OS_WIN95 = 1,
  61   OS_NT
  62 };
  63
  64 extern int os_subtype;
  65
  66 /* Emulation of Unix sbrk().  */
  67 extern void *sbrk (unsigned long size);
  68
  69 /* Initialize heap structures for sbrk on startup.  */
  70 extern void init_heap ();
  71
  72 /* Round the heap to this size.  */
  73 extern void round_heap (unsigned long size);
  74
  75 /* Cache system info, e.g., the NT page size.  */
  76 extern void cache_system_info (void);
  77
  78 /* ----------------------------------------------------------------- */
  79 /* Useful routines for manipulating memory-mapped files. */
  80
  81 typedef struct file_data {
  82     char          *name;
  83     unsigned long  size;
  84     HANDLE         file;
  85     HANDLE         file_mapping;
  86     unsigned char *file_base;
  87 } file_data;
  88
  89 #define OFFSET_TO_RVA(var,section) \
  90           (section->VirtualAddress + ((DWORD)(var) - section->PointerToRawData))
  91
  92 #define RVA_TO_OFFSET(var,section) \
  93           (section->PointerToRawData + ((DWORD)(var) - section->VirtualAddress))
  94
  95 #define RVA_TO_PTR(var,section,filedata) \
  96           ((void *)(RVA_TO_OFFSET(var,section) + (filedata).file_base))
  97
  98 int open_input_file (file_data *p_file, char *name);
  99 int open_output_file (file_data *p_file, char *name, unsigned long size);
 100 void close_file_data (file_data *p_file);
 101
 102 /* Return pointer to section header for named section. */
 103 IMAGE_SECTION_HEADER * find_section (char * name, IMAGE_NT_HEADERS * nt_header);
 104
 105 /* Return pointer to section header for section containing the given
 106    relative virtual address. */
 107 IMAGE_SECTION_HEADER * rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header);
 108
 109 #endif /* NTHEAP_H_ */