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 Filename filename_from_str(const char *str)
22 strncpy(ret.path, str, sizeof(ret.path));
23 ret.path[sizeof(ret.path)-1] = '\0';
27 const char *filename_to_str(const Filename *fn)
32 int filename_equal(Filename f1, Filename f2)
34 return !strcmp(f1.path, f2.path);
37 int filename_is_null(Filename fn)
42 char *get_username(void)
48 if (GetUserName(NULL, &namelen) == FALSE)
51 user = snewn(namelen, char);
52 GetUserName(user, &namelen);
57 int SaneDialogBox(HINSTANCE hinst,
69 wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
70 wc.lpfnWndProc = DefDlgProc;
72 wc.cbWndExtra = DLGWINDOWEXTRA + 8;
75 wc.hCursor = LoadCursor(NULL, IDC_ARROW);
76 wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
77 wc.lpszMenuName = NULL;
78 wc.lpszClassName = "PuTTYConfigBox";
81 hwnd = CreateDialog(hinst, tmpl, hwndparent, lpDialogFunc);
83 SetWindowLong(hwnd, BOXFLAGS, 0); /* flags */
84 SetWindowLong(hwnd, BOXRESULT, 0); /* result from SaneEndDialog */
86 while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
87 flags=GetWindowLong(hwnd, BOXFLAGS);
88 if (!(flags & DF_END) && !IsDialogMessage(hwnd, &msg))
89 DispatchMessage(&msg);
95 PostQuitMessage(msg.wParam); /* We got a WM_QUIT, pass it on */
97 ret=GetWindowLong(hwnd, BOXRESULT);
102 void SaneEndDialog(HWND hwnd, int ret)
104 SetWindowLong(hwnd, BOXRESULT, ret);
105 SetWindowLong(hwnd, BOXFLAGS, DF_END);
108 BOOL init_winver(void)
110 ZeroMemory(&osVersion, sizeof(osVersion));
111 osVersion.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
112 return GetVersionEx ( (OSVERSIONINFO *) &osVersion);
116 static FILE *debug_fp = NULL;
117 static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
118 static int debug_got_console = 0;
120 void dputs(char *buf)
124 if (!debug_got_console) {
125 if (AllocConsole()) {
126 debug_got_console = 1;
127 debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
131 debug_fp = fopen("debug.log", "w");
134 if (debug_hdl != INVALID_HANDLE_VALUE) {
135 WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
137 fputs(buf, debug_fp);
144 * Minefield - a Windows equivalent for Electric Fence
147 #define PAGESIZE 4096
152 * We start by reserving as much virtual address space as Windows
153 * will sensibly (or not sensibly) let us have. We flag it all as
156 * Any allocation attempt is satisfied by committing one or more
157 * pages, with an uncommitted page on either side. The returned
158 * memory region is jammed up against the _end_ of the pages.
160 * Freeing anything causes instantaneous decommitment of the pages
161 * involved, so stale pointers are caught as soon as possible.
164 static int minefield_initialised = 0;
165 static void *minefield_region = NULL;
166 static long minefield_size = 0;
167 static long minefield_npages = 0;
168 static long minefield_curpos = 0;
169 static unsigned short *minefield_admin = NULL;
170 static void *minefield_pages = NULL;
172 static void minefield_admin_hide(int hide)
174 int access = hide ? PAGE_NOACCESS : PAGE_READWRITE;
175 VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL);
178 static void minefield_init(void)
184 for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) {
185 minefield_region = VirtualAlloc(NULL, size,
186 MEM_RESERVE, PAGE_NOACCESS);
187 if (minefield_region)
190 minefield_size = size;
193 * Firstly, allocate a section of that to be the admin block.
194 * We'll need a two-byte field for each page.
196 minefield_admin = minefield_region;
197 minefield_npages = minefield_size / PAGESIZE;
198 admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1);
199 minefield_npages = (minefield_size - admin_size) / PAGESIZE;
200 minefield_pages = (char *) minefield_region + admin_size;
203 * Commit the admin region.
205 VirtualAlloc(minefield_admin, minefield_npages * 2,
206 MEM_COMMIT, PAGE_READWRITE);
209 * Mark all pages as unused (0xFFFF).
211 for (i = 0; i < minefield_npages; i++)
212 minefield_admin[i] = 0xFFFF;
215 * Hide the admin region.
217 minefield_admin_hide(1);
219 minefield_initialised = 1;
222 static void minefield_bomb(void)
224 div(1, *(int *) minefield_pages);
227 static void *minefield_alloc(int size)
230 int pos, lim, region_end, region_start;
234 npages = (size + PAGESIZE - 1) / PAGESIZE;
236 minefield_admin_hide(0);
239 * Search from current position until we find a contiguous
240 * bunch of npages+2 unused pages.
242 pos = minefield_curpos;
243 lim = minefield_npages;
245 /* Skip over used pages. */
246 while (pos < lim && minefield_admin[pos] != 0xFFFF)
248 /* Count unused pages. */
250 while (pos < lim && pos - start < npages + 2 &&
251 minefield_admin[pos] == 0xFFFF)
253 if (pos - start == npages + 2)
255 /* If we've reached the limit, reset the limit or stop. */
257 if (lim == minefield_npages) {
258 /* go round and start again at zero */
259 lim = minefield_curpos;
262 minefield_admin_hide(1);
268 minefield_curpos = pos - 1;
271 * We have npages+2 unused pages starting at start. We leave
272 * the first and last of these alone and use the rest.
274 region_end = (start + npages + 1) * PAGESIZE;
275 region_start = region_end - size;
276 /* FIXME: could align here if we wanted */
279 * Update the admin region.
281 for (i = start + 2; i < start + npages + 1; i++)
282 minefield_admin[i] = 0xFFFE; /* used but no region starts here */
283 minefield_admin[start + 1] = region_start % PAGESIZE;
285 minefield_admin_hide(1);
287 VirtualAlloc((char *) minefield_pages + region_start, size,
288 MEM_COMMIT, PAGE_READWRITE);
289 return (char *) minefield_pages + region_start;
292 static void minefield_free(void *ptr)
294 int region_start, i, j;
296 minefield_admin_hide(0);
298 region_start = (char *) ptr - (char *) minefield_pages;
299 i = region_start / PAGESIZE;
300 if (i < 0 || i >= minefield_npages ||
301 minefield_admin[i] != region_start % PAGESIZE)
303 for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) {
304 minefield_admin[j] = 0xFFFF;
307 VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT);
309 minefield_admin_hide(1);
312 static int minefield_get_size(void *ptr)
314 int region_start, i, j;
316 minefield_admin_hide(0);
318 region_start = (char *) ptr - (char *) minefield_pages;
319 i = region_start / PAGESIZE;
320 if (i < 0 || i >= minefield_npages ||
321 minefield_admin[i] != region_start % PAGESIZE)
323 for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++);
325 minefield_admin_hide(1);
327 return j * PAGESIZE - region_start;
330 void *minefield_c_malloc(size_t size)
332 if (!minefield_initialised)
334 return minefield_alloc(size);
337 void minefield_c_free(void *p)
339 if (!minefield_initialised)
345 * realloc _always_ moves the chunk, for rapid detection of code
346 * that assumes it won't.
348 void *minefield_c_realloc(void *p, size_t size)
352 if (!minefield_initialised)
354 q = minefield_alloc(size);
355 oldsize = minefield_get_size(p);
356 memcpy(q, p, (oldsize < size ? oldsize : size));
361 #endif /* MINEFIELD */