2 * winmisc.c: miscellaneous Windows-specific things.
9 OSVERSIONINFO osVersion
;
11 void platform_get_x11_auth(char *display
, int *proto
,
12 unsigned char *data
, int *datalen
)
14 /* We don't support this at all under Windows. */
17 Filename
filename_from_str(const char *str
)
20 strncpy(ret
.path
, str
, sizeof(ret
.path
));
21 ret
.path
[sizeof(ret
.path
)-1] = '\0';
25 const char *filename_to_str(const Filename
*fn
)
30 int filename_equal(Filename f1
, Filename f2
)
32 return !strcmp(f1
.path
, f2
.path
);
35 int filename_is_null(Filename fn
)
40 char *get_username(void)
46 if (GetUserName(NULL
, &namelen
) == FALSE
)
49 user
= snewn(namelen
, char);
50 GetUserName(user
, &namelen
);
55 int SaneDialogBox(HINSTANCE hinst
,
67 wc
.style
= CS_DBLCLKS
| CS_SAVEBITS
| CS_BYTEALIGNWINDOW
;
68 wc
.lpfnWndProc
= DefDlgProc
;
70 wc
.cbWndExtra
= DLGWINDOWEXTRA
+ 8;
73 wc
.hCursor
= LoadCursor(NULL
, IDC_ARROW
);
74 wc
.hbrBackground
= (HBRUSH
) (COLOR_BACKGROUND
+1);
75 wc
.lpszMenuName
= NULL
;
76 wc
.lpszClassName
= "PuTTYConfigBox";
79 hwnd
= CreateDialog(hinst
, tmpl
, hwndparent
, lpDialogFunc
);
81 SetWindowLong(hwnd
, BOXFLAGS
, 0); /* flags */
82 SetWindowLong(hwnd
, BOXRESULT
, 0); /* result from SaneEndDialog */
84 while ((gm
=GetMessage(&msg
, NULL
, 0, 0)) > 0) {
85 flags
=GetWindowLong(hwnd
, BOXFLAGS
);
86 if (!(flags
& DF_END
) && !IsDialogMessage(hwnd
, &msg
))
87 DispatchMessage(&msg
);
93 PostQuitMessage(msg
.wParam
); /* We got a WM_QUIT, pass it on */
95 ret
=GetWindowLong(hwnd
, BOXRESULT
);
100 void SaneEndDialog(HWND hwnd
, int ret
)
102 SetWindowLong(hwnd
, BOXRESULT
, ret
);
103 SetWindowLong(hwnd
, BOXFLAGS
, DF_END
);
106 BOOL
init_winver(void)
108 ZeroMemory(&osVersion
, sizeof(osVersion
));
109 osVersion
.dwOSVersionInfoSize
= sizeof (OSVERSIONINFO
);
110 return GetVersionEx ( (OSVERSIONINFO
*) &osVersion
);
114 static FILE *debug_fp
= NULL
;
115 static HANDLE debug_hdl
= INVALID_HANDLE_VALUE
;
116 static int debug_got_console
= 0;
118 void dputs(char *buf
)
122 if (!debug_got_console
) {
123 if (AllocConsole()) {
124 debug_got_console
= 1;
125 debug_hdl
= GetStdHandle(STD_OUTPUT_HANDLE
);
129 debug_fp
= fopen("debug.log", "w");
132 if (debug_hdl
!= INVALID_HANDLE_VALUE
) {
133 WriteFile(debug_hdl
, buf
, strlen(buf
), &dw
, NULL
);
135 fputs(buf
, debug_fp
);
142 * Minefield - a Windows equivalent for Electric Fence
145 #define PAGESIZE 4096
150 * We start by reserving as much virtual address space as Windows
151 * will sensibly (or not sensibly) let us have. We flag it all as
154 * Any allocation attempt is satisfied by committing one or more
155 * pages, with an uncommitted page on either side. The returned
156 * memory region is jammed up against the _end_ of the pages.
158 * Freeing anything causes instantaneous decommitment of the pages
159 * involved, so stale pointers are caught as soon as possible.
162 static int minefield_initialised
= 0;
163 static void *minefield_region
= NULL
;
164 static long minefield_size
= 0;
165 static long minefield_npages
= 0;
166 static long minefield_curpos
= 0;
167 static unsigned short *minefield_admin
= NULL
;
168 static void *minefield_pages
= NULL
;
170 static void minefield_admin_hide(int hide
)
172 int access
= hide ? PAGE_NOACCESS
: PAGE_READWRITE
;
173 VirtualProtect(minefield_admin
, minefield_npages
* 2, access
, NULL
);
176 static void minefield_init(void)
182 for (size
= 0x40000000; size
> 0; size
= ((size
>> 3) * 7) & ~0xFFF) {
183 minefield_region
= VirtualAlloc(NULL
, size
,
184 MEM_RESERVE
, PAGE_NOACCESS
);
185 if (minefield_region
)
188 minefield_size
= size
;
191 * Firstly, allocate a section of that to be the admin block.
192 * We'll need a two-byte field for each page.
194 minefield_admin
= minefield_region
;
195 minefield_npages
= minefield_size
/ PAGESIZE
;
196 admin_size
= (minefield_npages
* 2 + PAGESIZE
- 1) & ~(PAGESIZE
- 1);
197 minefield_npages
= (minefield_size
- admin_size
) / PAGESIZE
;
198 minefield_pages
= (char *) minefield_region
+ admin_size
;
201 * Commit the admin region.
203 VirtualAlloc(minefield_admin
, minefield_npages
* 2,
204 MEM_COMMIT
, PAGE_READWRITE
);
207 * Mark all pages as unused (0xFFFF).
209 for (i
= 0; i
< minefield_npages
; i
++)
210 minefield_admin
[i
] = 0xFFFF;
213 * Hide the admin region.
215 minefield_admin_hide(1);
217 minefield_initialised
= 1;
220 static void minefield_bomb(void)
222 div(1, *(int *) minefield_pages
);
225 static void *minefield_alloc(int size
)
228 int pos
, lim
, region_end
, region_start
;
232 npages
= (size
+ PAGESIZE
- 1) / PAGESIZE
;
234 minefield_admin_hide(0);
237 * Search from current position until we find a contiguous
238 * bunch of npages+2 unused pages.
240 pos
= minefield_curpos
;
241 lim
= minefield_npages
;
243 /* Skip over used pages. */
244 while (pos
< lim
&& minefield_admin
[pos
] != 0xFFFF)
246 /* Count unused pages. */
248 while (pos
< lim
&& pos
- start
< npages
+ 2 &&
249 minefield_admin
[pos
] == 0xFFFF)
251 if (pos
- start
== npages
+ 2)
253 /* If we've reached the limit, reset the limit or stop. */
255 if (lim
== minefield_npages
) {
256 /* go round and start again at zero */
257 lim
= minefield_curpos
;
260 minefield_admin_hide(1);
266 minefield_curpos
= pos
- 1;
269 * We have npages+2 unused pages starting at start. We leave
270 * the first and last of these alone and use the rest.
272 region_end
= (start
+ npages
+ 1) * PAGESIZE
;
273 region_start
= region_end
- size
;
274 /* FIXME: could align here if we wanted */
277 * Update the admin region.
279 for (i
= start
+ 2; i
< start
+ npages
+ 1; i
++)
280 minefield_admin
[i
] = 0xFFFE; /* used but no region starts here */
281 minefield_admin
[start
+ 1] = region_start
% PAGESIZE
;
283 minefield_admin_hide(1);
285 VirtualAlloc((char *) minefield_pages
+ region_start
, size
,
286 MEM_COMMIT
, PAGE_READWRITE
);
287 return (char *) minefield_pages
+ region_start
;
290 static void minefield_free(void *ptr
)
292 int region_start
, i
, j
;
294 minefield_admin_hide(0);
296 region_start
= (char *) ptr
- (char *) minefield_pages
;
297 i
= region_start
/ PAGESIZE
;
298 if (i
< 0 || i
>= minefield_npages
||
299 minefield_admin
[i
] != region_start
% PAGESIZE
)
301 for (j
= i
; j
< minefield_npages
&& minefield_admin
[j
] != 0xFFFF; j
++) {
302 minefield_admin
[j
] = 0xFFFF;
305 VirtualFree(ptr
, j
* PAGESIZE
- region_start
, MEM_DECOMMIT
);
307 minefield_admin_hide(1);
310 static int minefield_get_size(void *ptr
)
312 int region_start
, i
, j
;
314 minefield_admin_hide(0);
316 region_start
= (char *) ptr
- (char *) minefield_pages
;
317 i
= region_start
/ PAGESIZE
;
318 if (i
< 0 || i
>= minefield_npages
||
319 minefield_admin
[i
] != region_start
% PAGESIZE
)
321 for (j
= i
; j
< minefield_npages
&& minefield_admin
[j
] != 0xFFFF; j
++);
323 minefield_admin_hide(1);
325 return j
* PAGESIZE
- region_start
;
328 void *minefield_c_malloc(size_t size
)
330 if (!minefield_initialised
)
332 return minefield_alloc(size
);
335 void minefield_c_free(void *p
)
337 if (!minefield_initialised
)
343 * realloc _always_ moves the chunk, for rapid detection of code
344 * that assumes it won't.
346 void *minefield_c_realloc(void *p
, size_t size
)
350 if (!minefield_initialised
)
352 q
= minefield_alloc(size
);
353 oldsize
= minefield_get_size(p
);
354 memcpy(q
, p
, (oldsize
< size ? oldsize
: size
));
359 #endif /* MINEFIELD */