1 /* Heap management routines (including unexec) for GNU Emacs on Windows NT.
2 Copyright (C) 1994, 2001-2011 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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.
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.
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/>.
19 Geoff Voelker (voelker@cs.washington.edu) 7-29-94
27 #define ROUND_UP(p, align) (((DWORD)(p) + (align)-1) & ~((align)-1))
28 #define ROUND_DOWN(p, align) ((DWORD)(p) & ~((align)-1))
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
43 extern unsigned char *get_data_start (void);
44 extern unsigned char *get_data_end (void);
45 extern unsigned long 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
;
58 extern int os_subtype
;
60 /* Emulation of Unix sbrk(). */
61 extern void *sbrk (unsigned long size
);
63 /* Initialize heap structures for sbrk on startup. */
64 extern void init_heap (void);
66 /* Round the heap to this size. */
67 extern void round_heap (unsigned long size
);
69 /* Cache system info, e.g., the NT page size. */
70 extern void cache_system_info (void);
72 /* ----------------------------------------------------------------- */
73 /* Useful routines for manipulating memory-mapped files. */
75 typedef struct file_data
{
80 unsigned char *file_base
;
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
);
87 /* Return pointer to section header for named section. */
88 IMAGE_SECTION_HEADER
* find_section (char * name
, IMAGE_NT_HEADERS
* nt_header
);
90 /* Return pointer to section header for section containing the given
91 relative virtual address. */
92 IMAGE_SECTION_HEADER
* rva_to_section (DWORD rva
, IMAGE_NT_HEADERS
* nt_header
);
94 #endif /* NTHEAP_H_ */