2 * winmisc.c: miscellaneous Windows-specific things.
11 OSVERSIONINFO osVersion;
13 void platform_get_x11_auth(char *display, int *proto,
14 unsigned char *data, int *datalen)
16 /* We don't support this at all under Windows. */
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 int SaneDialogBox(HINSTANCE hinst,
54 wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
55 wc.lpfnWndProc = DefDlgProc;
57 wc.cbWndExtra = DLGWINDOWEXTRA + 8;
60 wc.hCursor = LoadCursor(NULL, IDC_ARROW);
61 wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
62 wc.lpszMenuName = NULL;
63 wc.lpszClassName = "PuTTYConfigBox";
66 hwnd = CreateDialog(hinst, tmpl, hwndparent, lpDialogFunc);
68 SetWindowLong(hwnd, BOXFLAGS, 0); /* flags */
69 SetWindowLong(hwnd, BOXRESULT, 0); /* result from SaneEndDialog */
71 while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
72 flags=GetWindowLong(hwnd, BOXFLAGS);
73 if (!(flags & DF_END) && !IsDialogMessage(hwnd, &msg))
74 DispatchMessage(&msg);
80 PostQuitMessage(msg.wParam); /* We got a WM_QUIT, pass it on */
82 ret=GetWindowLong(hwnd, BOXRESULT);
87 void SaneEndDialog(HWND hwnd, int ret)
89 SetWindowLong(hwnd, BOXRESULT, ret);
90 SetWindowLong(hwnd, BOXFLAGS, DF_END);
93 BOOL init_winver(void)
95 ZeroMemory(&osVersion, sizeof(osVersion));
96 osVersion.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
97 return GetVersionEx ( (OSVERSIONINFO *) &osVersion);
101 static FILE *debug_fp = NULL;
102 static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
103 static int debug_got_console = 0;
105 void dputs(char *buf)
109 if (!debug_got_console) {
110 if (AllocConsole()) {
111 debug_got_console = 1;
112 debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
116 debug_fp = fopen("debug.log", "w");
119 if (debug_hdl != INVALID_HANDLE_VALUE) {
120 WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
122 fputs(buf, debug_fp);
129 * Minefield - a Windows equivalent for Electric Fence
132 #define PAGESIZE 4096
137 * We start by reserving as much virtual address space as Windows
138 * will sensibly (or not sensibly) let us have. We flag it all as
141 * Any allocation attempt is satisfied by committing one or more
142 * pages, with an uncommitted page on either side. The returned
143 * memory region is jammed up against the _end_ of the pages.
145 * Freeing anything causes instantaneous decommitment of the pages
146 * involved, so stale pointers are caught as soon as possible.
149 static int minefield_initialised = 0;
150 static void *minefield_region = NULL;
151 static long minefield_size = 0;
152 static long minefield_npages = 0;
153 static long minefield_curpos = 0;
154 static unsigned short *minefield_admin = NULL;
155 static void *minefield_pages = NULL;
157 static void minefield_admin_hide(int hide)
159 int access = hide ? PAGE_NOACCESS : PAGE_READWRITE;
160 VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL);
163 static void minefield_init(void)
169 for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) {
170 minefield_region = VirtualAlloc(NULL, size,
171 MEM_RESERVE, PAGE_NOACCESS);
172 if (minefield_region)
175 minefield_size = size;
178 * Firstly, allocate a section of that to be the admin block.
179 * We'll need a two-byte field for each page.
181 minefield_admin = minefield_region;
182 minefield_npages = minefield_size / PAGESIZE;
183 admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1);
184 minefield_npages = (minefield_size - admin_size) / PAGESIZE;
185 minefield_pages = (char *) minefield_region + admin_size;
188 * Commit the admin region.
190 VirtualAlloc(minefield_admin, minefield_npages * 2,
191 MEM_COMMIT, PAGE_READWRITE);
194 * Mark all pages as unused (0xFFFF).
196 for (i = 0; i < minefield_npages; i++)
197 minefield_admin[i] = 0xFFFF;
200 * Hide the admin region.
202 minefield_admin_hide(1);
204 minefield_initialised = 1;
207 static void minefield_bomb(void)
209 div(1, *(int *) minefield_pages);
212 static void *minefield_alloc(int size)
215 int pos, lim, region_end, region_start;
219 npages = (size + PAGESIZE - 1) / PAGESIZE;
221 minefield_admin_hide(0);
224 * Search from current position until we find a contiguous
225 * bunch of npages+2 unused pages.
227 pos = minefield_curpos;
228 lim = minefield_npages;
230 /* Skip over used pages. */
231 while (pos < lim && minefield_admin[pos] != 0xFFFF)
233 /* Count unused pages. */
235 while (pos < lim && pos - start < npages + 2 &&
236 minefield_admin[pos] == 0xFFFF)
238 if (pos - start == npages + 2)
240 /* If we've reached the limit, reset the limit or stop. */
242 if (lim == minefield_npages) {
243 /* go round and start again at zero */
244 lim = minefield_curpos;
247 minefield_admin_hide(1);
253 minefield_curpos = pos - 1;
256 * We have npages+2 unused pages starting at start. We leave
257 * the first and last of these alone and use the rest.
259 region_end = (start + npages + 1) * PAGESIZE;
260 region_start = region_end - size;
261 /* FIXME: could align here if we wanted */
264 * Update the admin region.
266 for (i = start + 2; i < start + npages + 1; i++)
267 minefield_admin[i] = 0xFFFE; /* used but no region starts here */
268 minefield_admin[start + 1] = region_start % PAGESIZE;
270 minefield_admin_hide(1);
272 VirtualAlloc((char *) minefield_pages + region_start, size,
273 MEM_COMMIT, PAGE_READWRITE);
274 return (char *) minefield_pages + region_start;
277 static void minefield_free(void *ptr)
279 int region_start, i, j;
281 minefield_admin_hide(0);
283 region_start = (char *) ptr - (char *) minefield_pages;
284 i = region_start / PAGESIZE;
285 if (i < 0 || i >= minefield_npages ||
286 minefield_admin[i] != region_start % PAGESIZE)
288 for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) {
289 minefield_admin[j] = 0xFFFF;
292 VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT);
294 minefield_admin_hide(1);
297 static int minefield_get_size(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++);
310 minefield_admin_hide(1);
312 return j * PAGESIZE - region_start;
315 void *minefield_c_malloc(size_t size)
317 if (!minefield_initialised)
319 return minefield_alloc(size);
322 void minefield_c_free(void *p)
324 if (!minefield_initialised)
330 * realloc _always_ moves the chunk, for rapid detection of code
331 * that assumes it won't.
333 void *minefield_c_realloc(void *p, size_t size)
337 if (!minefield_initialised)
339 q = minefield_alloc(size);
340 oldsize = minefield_get_size(p);
341 memcpy(q, p, (oldsize < size ? oldsize : size));
346 #endif /* MINEFIELD */