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 #define ROUND_UP(p, align)   (((DWORD_PTR)(p) + (align)-1) & ~((DWORD_PTR)(align)-1))
  28 #define ROUND_DOWN(p, align) ((DWORD_PTR)(p) & ~((DWORD_PTR)(align)-1))
  29
  30 /*
  31  * Heap related stuff.
  32  */
  33 #define get_reserved_heap_size()        reserved_heap_size
  34 #define get_committed_heap_size()       (get_data_end () - get_data_start ())
  35 #define get_heap_start()                get_data_start ()
  36 #define get_heap_end()                  get_data_end ()
  37 #define get_page_size()                 sysinfo_cache.dwPageSize
  38 #define get_allocation_unit()           sysinfo_cache.dwAllocationGranularity
  39 #define get_processor_type()            sysinfo_cache.dwProcessorType
  40 #define get_w32_major_version()         w32_major_version
  41 #define get_w32_minor_version()         w32_minor_version
  42
  43 extern unsigned char *get_data_start (void);
  44 extern unsigned char *get_data_end (void);
  45 extern size_t         reserved_heap_size;
  46 extern SYSTEM_INFO    sysinfo_cache;
  47 extern OSVERSIONINFO  osinfo_cache;
  48 extern BOOL           using_dynamic_heap;
  49 extern int            w32_major_version;
  50 extern int            w32_minor_version;
  51 extern int            w32_build_number;
  52
  53 enum {
  54   OS_9X = 1,
  55   OS_NT
  56 };
  57
  58 extern int os_subtype;
  59
  60 /* Emulation of Unix sbrk().  */
  61 extern void *sbrk (ptrdiff_t size);
  62
  63 /* Initialize heap structures for sbrk on startup.  */
  64 extern void init_heap (void);
  65
  66 /* Round the heap to this size.  */
  67 extern void round_heap (size_t size);
  68
  69 /* Cache system info, e.g., the NT page size.  */
  70 extern void cache_system_info (void);
  71
  72 /* ----------------------------------------------------------------- */
  73 /* Useful routines for manipulating memory-mapped files. */
  74
  75 typedef struct file_data {
  76     char          *name;
  77     unsigned long  size;
  78     HANDLE         file;
  79     HANDLE         file_mapping;
  80     unsigned char *file_base;
  81 } file_data;
  82
  83 int open_input_file (file_data *p_file, char *name);
  84 int open_output_file (file_data *p_file, char *name, unsigned long size);
  85 void close_file_data (file_data *p_file);
  86
  87 /* Return pointer to section header for named section. */
  88 IMAGE_SECTION_HEADER * find_section (char * name, IMAGE_NT_HEADERS * nt_header);
  89
  90 /* Return pointer to section header for section containing the given
  91    relative virtual address. */
  92 IMAGE_SECTION_HEADER * rva_to_section (DWORD_PTR rva, IMAGE_NT_HEADERS * nt_header);
  93
  94 #endif /* NTHEAP_H_ */