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 const char platform_x11_best_transport
[] = "localhost";
19 char *platform_get_x_display(void) {
20 /* We may as well check for DISPLAY in case it's useful. */
21 return dupstr(getenv("DISPLAY"));
24 Filename
filename_from_str(const char *str
)
27 strncpy(ret
.path
, str
, sizeof(ret
.path
));
28 ret
.path
[sizeof(ret
.path
)-1] = '\0';
32 const char *filename_to_str(const Filename
*fn
)
37 int filename_equal(Filename f1
, Filename f2
)
39 return !strcmp(f1
.path
, f2
.path
);
42 int filename_is_null(Filename fn
)
47 char *get_username(void)
53 if (GetUserName(NULL
, &namelen
) == FALSE
)
56 user
= snewn(namelen
, char);
57 GetUserName(user
, &namelen
);
62 int SaneDialogBox(HINSTANCE hinst
,
74 wc
.style
= CS_DBLCLKS
| CS_SAVEBITS
| CS_BYTEALIGNWINDOW
;
75 wc
.lpfnWndProc
= DefDlgProc
;
77 wc
.cbWndExtra
= DLGWINDOWEXTRA
+ 8;
80 wc
.hCursor
= LoadCursor(NULL
, IDC_ARROW
);
81 wc
.hbrBackground
= (HBRUSH
) (COLOR_BACKGROUND
+1);
82 wc
.lpszMenuName
= NULL
;
83 wc
.lpszClassName
= "PuTTYConfigBox";
86 hwnd
= CreateDialog(hinst
, tmpl
, hwndparent
, lpDialogFunc
);
88 SetWindowLong(hwnd
, BOXFLAGS
, 0); /* flags */
89 SetWindowLong(hwnd
, BOXRESULT
, 0); /* result from SaneEndDialog */
91 while ((gm
=GetMessage(&msg
, NULL
, 0, 0)) > 0) {
92 flags
=GetWindowLong(hwnd
, BOXFLAGS
);
93 if (!(flags
& DF_END
) && !IsDialogMessage(hwnd
, &msg
))
94 DispatchMessage(&msg
);
100 PostQuitMessage(msg
.wParam
); /* We got a WM_QUIT, pass it on */
102 ret
=GetWindowLong(hwnd
, BOXRESULT
);
107 void SaneEndDialog(HWND hwnd
, int ret
)
109 SetWindowLong(hwnd
, BOXRESULT
, ret
);
110 SetWindowLong(hwnd
, BOXFLAGS
, DF_END
);
113 BOOL
init_winver(void)
115 ZeroMemory(&osVersion
, sizeof(osVersion
));
116 osVersion
.dwOSVersionInfoSize
= sizeof (OSVERSIONINFO
);
117 return GetVersionEx ( (OSVERSIONINFO
*) &osVersion
);
121 static FILE *debug_fp
= NULL
;
122 static HANDLE debug_hdl
= INVALID_HANDLE_VALUE
;
123 static int debug_got_console
= 0;
125 void dputs(char *buf
)
129 if (!debug_got_console
) {
130 if (AllocConsole()) {
131 debug_got_console
= 1;
132 debug_hdl
= GetStdHandle(STD_OUTPUT_HANDLE
);
136 debug_fp
= fopen("debug.log", "w");
139 if (debug_hdl
!= INVALID_HANDLE_VALUE
) {
140 WriteFile(debug_hdl
, buf
, strlen(buf
), &dw
, NULL
);
142 fputs(buf
, debug_fp
);
149 * Minefield - a Windows equivalent for Electric Fence
152 #define PAGESIZE 4096
157 * We start by reserving as much virtual address space as Windows
158 * will sensibly (or not sensibly) let us have. We flag it all as
161 * Any allocation attempt is satisfied by committing one or more
162 * pages, with an uncommitted page on either side. The returned
163 * memory region is jammed up against the _end_ of the pages.
165 * Freeing anything causes instantaneous decommitment of the pages
166 * involved, so stale pointers are caught as soon as possible.
169 static int minefield_initialised
= 0;
170 static void *minefield_region
= NULL
;
171 static long minefield_size
= 0;
172 static long minefield_npages
= 0;
173 static long minefield_curpos
= 0;
174 static unsigned short *minefield_admin
= NULL
;
175 static void *minefield_pages
= NULL
;
177 static void minefield_admin_hide(int hide
)
179 int access
= hide ? PAGE_NOACCESS
: PAGE_READWRITE
;
180 VirtualProtect(minefield_admin
, minefield_npages
* 2, access
, NULL
);
183 static void minefield_init(void)
189 for (size
= 0x40000000; size
> 0; size
= ((size
>> 3) * 7) & ~0xFFF) {
190 minefield_region
= VirtualAlloc(NULL
, size
,
191 MEM_RESERVE
, PAGE_NOACCESS
);
192 if (minefield_region
)
195 minefield_size
= size
;
198 * Firstly, allocate a section of that to be the admin block.
199 * We'll need a two-byte field for each page.
201 minefield_admin
= minefield_region
;
202 minefield_npages
= minefield_size
/ PAGESIZE
;
203 admin_size
= (minefield_npages
* 2 + PAGESIZE
- 1) & ~(PAGESIZE
- 1);
204 minefield_npages
= (minefield_size
- admin_size
) / PAGESIZE
;
205 minefield_pages
= (char *) minefield_region
+ admin_size
;
208 * Commit the admin region.
210 VirtualAlloc(minefield_admin
, minefield_npages
* 2,
211 MEM_COMMIT
, PAGE_READWRITE
);
214 * Mark all pages as unused (0xFFFF).
216 for (i
= 0; i
< minefield_npages
; i
++)
217 minefield_admin
[i
] = 0xFFFF;
220 * Hide the admin region.
222 minefield_admin_hide(1);
224 minefield_initialised
= 1;
227 static void minefield_bomb(void)
229 div(1, *(int *) minefield_pages
);
232 static void *minefield_alloc(int size
)
235 int pos
, lim
, region_end
, region_start
;
239 npages
= (size
+ PAGESIZE
- 1) / PAGESIZE
;
241 minefield_admin_hide(0);
244 * Search from current position until we find a contiguous
245 * bunch of npages+2 unused pages.
247 pos
= minefield_curpos
;
248 lim
= minefield_npages
;
250 /* Skip over used pages. */
251 while (pos
< lim
&& minefield_admin
[pos
] != 0xFFFF)
253 /* Count unused pages. */
255 while (pos
< lim
&& pos
- start
< npages
+ 2 &&
256 minefield_admin
[pos
] == 0xFFFF)
258 if (pos
- start
== npages
+ 2)
260 /* If we've reached the limit, reset the limit or stop. */
262 if (lim
== minefield_npages
) {
263 /* go round and start again at zero */
264 lim
= minefield_curpos
;
267 minefield_admin_hide(1);
273 minefield_curpos
= pos
- 1;
276 * We have npages+2 unused pages starting at start. We leave
277 * the first and last of these alone and use the rest.
279 region_end
= (start
+ npages
+ 1) * PAGESIZE
;
280 region_start
= region_end
- size
;
281 /* FIXME: could align here if we wanted */
284 * Update the admin region.
286 for (i
= start
+ 2; i
< start
+ npages
+ 1; i
++)
287 minefield_admin
[i
] = 0xFFFE; /* used but no region starts here */
288 minefield_admin
[start
+ 1] = region_start
% PAGESIZE
;
290 minefield_admin_hide(1);
292 VirtualAlloc((char *) minefield_pages
+ region_start
, size
,
293 MEM_COMMIT
, PAGE_READWRITE
);
294 return (char *) minefield_pages
+ region_start
;
297 static void minefield_free(void *ptr
)
299 int region_start
, i
, j
;
301 minefield_admin_hide(0);
303 region_start
= (char *) ptr
- (char *) minefield_pages
;
304 i
= region_start
/ PAGESIZE
;
305 if (i
< 0 || i
>= minefield_npages
||
306 minefield_admin
[i
] != region_start
% PAGESIZE
)
308 for (j
= i
; j
< minefield_npages
&& minefield_admin
[j
] != 0xFFFF; j
++) {
309 minefield_admin
[j
] = 0xFFFF;
312 VirtualFree(ptr
, j
* PAGESIZE
- region_start
, MEM_DECOMMIT
);
314 minefield_admin_hide(1);
317 static int minefield_get_size(void *ptr
)
319 int region_start
, i
, j
;
321 minefield_admin_hide(0);
323 region_start
= (char *) ptr
- (char *) minefield_pages
;
324 i
= region_start
/ PAGESIZE
;
325 if (i
< 0 || i
>= minefield_npages
||
326 minefield_admin
[i
] != region_start
% PAGESIZE
)
328 for (j
= i
; j
< minefield_npages
&& minefield_admin
[j
] != 0xFFFF; j
++);
330 minefield_admin_hide(1);
332 return j
* PAGESIZE
- region_start
;
335 void *minefield_c_malloc(size_t size
)
337 if (!minefield_initialised
)
339 return minefield_alloc(size
);
342 void minefield_c_free(void *p
)
344 if (!minefield_initialised
)
350 * realloc _always_ moves the chunk, for rapid detection of code
351 * that assumes it won't.
353 void *minefield_c_realloc(void *p
, size_t size
)
357 if (!minefield_initialised
)
359 q
= minefield_alloc(size
);
360 oldsize
= minefield_get_size(p
);
361 memcpy(q
, p
, (oldsize
< size ? oldsize
: size
));
366 #endif /* MINEFIELD */