src/w32heap.h

   1 /* Heap management routines (including unexec) for GNU Emacs on Windows NT.
   2    Copyright (C) 1994, 2001, 2002, 2003, 2004, 2005,
   3                  2006, 2007, 2008  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.
  21
  22    Geoff Voelker (voelker@cs.washington.edu)                         7-29-94
  23 */
  24
  25 #ifndef NTHEAP_H_
  26 #define NTHEAP_H_
  27
  28 #include <windows.h>
  29
  30 #define ROUND_UP(p, align)   (((DWORD)(p) + (align)-1) & ~((align)-1))
  31 #define ROUND_DOWN(p, align) ((DWORD)(p) & ~((align)-1))
  32
  33 /*
  34  * Heap related stuff.
  35  */
  36 #define get_reserved_heap_size()        reserved_heap_size
  37 #define get_committed_heap_size()       (get_data_end () - get_data_start ())
  38 #define get_heap_start()                get_data_start ()
  39 #define get_heap_end()                  get_data_end ()
  40 #define get_page_size()                 sysinfo_cache.dwPageSize
  41 #define get_allocation_unit()           sysinfo_cache.dwAllocationGranularity
  42 #define get_processor_type()            sysinfo_cache.dwProcessorType
  43 #define get_w32_major_version()         w32_major_version
  44 #define get_w32_minor_version()         w32_minor_version
  45
  46 extern unsigned char *get_data_start();
  47 extern unsigned char *get_data_end();
  48 extern unsigned long  reserved_heap_size;
  49 extern SYSTEM_INFO    sysinfo_cache;
  50 extern OSVERSIONINFO  osinfo_cache;
  51 extern BOOL           using_dynamic_heap;
  52 extern int            w32_major_version;
  53 extern int            w32_minor_version;
  54 extern int            w32_build_number;
  55
  56 enum {
  57   OS_WIN95 = 1,
  58   OS_NT
  59 };
  60
  61 extern int os_subtype;
  62
  63 /* Emulation of Unix sbrk().  */
  64 extern void *sbrk (unsigned long size);
  65
  66 /* Initialize heap structures for sbrk on startup.  */
  67 extern void init_heap ();
  68
  69 /* Round the heap to this size.  */
  70 extern void round_heap (unsigned long size);
  71
  72 /* Cache system info, e.g., the NT page size.  */
  73 extern void cache_system_info (void);
  74
  75 /* ----------------------------------------------------------------- */
  76 /* Useful routines for manipulating memory-mapped files. */
  77
  78 typedef struct file_data {
  79     char          *name;
  80     unsigned long  size;
  81     HANDLE         file;
  82     HANDLE         file_mapping;
  83     unsigned char *file_base;
  84 } file_data;
  85
  86 int open_input_file (file_data *p_file, char *name);
  87 int open_output_file (file_data *p_file, char *name, unsigned long size);
  88 void close_file_data (file_data *p_file);
  89
  90 /* Return pointer to section header for named section. */
  91 IMAGE_SECTION_HEADER * find_section (char * name, IMAGE_NT_HEADERS * nt_header);
  92
  93 /* Return pointer to section header for section containing the given
  94    relative virtual address. */
  95 IMAGE_SECTION_HEADER * rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header);
  96
  97 #endif /* NTHEAP_H_ */
  98
  99 /* arch-tag: 3ba4cbe1-8a09-4a41-8f37-fd31f7426b3c
 100    (do not change this comment) */