4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 Red Hat, Inc.
7 * QEMU library functions for win32 which are shared between QEMU and
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
28 * The implementation of g_poll (functions poll_rest, g_poll) at the end of
29 * this file are based on code from GNOME glib-2 and use a different license,
30 * see the license comment there.
35 #include "config-host.h"
36 #include "sysemu/sysemu.h"
37 #include "qemu/main-loop.h"
39 #include "qemu/sockets.h"
41 /* this must come after including "trace.h" */
44 void *qemu_oom_check(void *ptr)
47 fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
53 void *qemu_try_memalign(size_t alignment, size_t size)
60 ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
61 trace_qemu_memalign(alignment, size, ptr);
65 void *qemu_memalign(size_t alignment, size_t size)
67 return qemu_oom_check(qemu_try_memalign(alignment, size));
70 void *qemu_anon_ram_alloc(size_t size, uint64_t *align)
74 /* FIXME: this is not exactly optimal solution since VirtualAlloc
75 has 64Kb granularity, but at least it guarantees us that the
76 memory is page aligned. */
77 ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
78 trace_qemu_anon_ram_alloc(size, ptr);
82 void qemu_vfree(void *ptr)
84 trace_qemu_vfree(ptr);
86 VirtualFree(ptr, 0, MEM_RELEASE);
90 void qemu_anon_ram_free(void *ptr, size_t size)
92 trace_qemu_anon_ram_free(ptr, size);
94 VirtualFree(ptr, 0, MEM_RELEASE);
98 /* FIXME: add proper locking */
99 struct tm *gmtime_r(const time_t *timep, struct tm *result)
101 struct tm *p = gmtime(timep);
102 memset(result, 0, sizeof(*result));
110 /* FIXME: add proper locking */
111 struct tm *localtime_r(const time_t *timep, struct tm *result)
113 struct tm *p = localtime(timep);
114 memset(result, 0, sizeof(*result));
122 void qemu_set_block(int fd)
124 unsigned long opt = 0;
125 WSAEventSelect(fd, NULL, 0);
126 ioctlsocket(fd, FIONBIO, &opt);
129 void qemu_set_nonblock(int fd)
131 unsigned long opt = 1;
132 ioctlsocket(fd, FIONBIO, &opt);
133 qemu_fd_register(fd);
136 int socket_set_fast_reuse(int fd)
138 /* Enabling the reuse of an endpoint that was used by a socket still in
139 * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
140 * fast reuse is the default and SO_REUSEADDR does strange things. So we
141 * don't have to do anything here. More info can be found at:
142 * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
146 int inet_aton(const char *cp, struct in_addr *ia)
148 uint32_t addr = inet_addr(cp);
149 if (addr == 0xffffffff) {
156 void qemu_set_cloexec(int fd)
160 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
161 #define _W32_FT_OFFSET (116444736000000000ULL)
163 int qemu_gettimeofday(qemu_timeval *tp)
166 unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
171 GetSystemTimeAsFileTime (&_now.ft);
172 tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
173 tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
175 /* Always return 0 as per Open Group Base Specifications Issue 6.
176 Do not set errno on error. */
180 int qemu_get_thread_id(void)
182 return GetCurrentThreadId();
186 qemu_get_local_state_pathname(const char *relative_pathname)
189 char base_path[MAX_PATH+1] = "";
191 result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
192 /* SHGFP_TYPE_CURRENT */ 0, base_path);
193 if (result != S_OK) {
194 /* misconfigured environment */
195 g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
198 return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
202 void qemu_set_tty_echo(int fd, bool echo)
204 HANDLE handle = (HANDLE)_get_osfhandle(fd);
207 if (handle == INVALID_HANDLE_VALUE) {
211 GetConsoleMode(handle, &dwMode);
214 SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
216 SetConsoleMode(handle,
217 dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
221 static char exec_dir[PATH_MAX];
223 void qemu_init_exec_dir(const char *argv0)
230 len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
237 while (p != buf && *p != '\\') {
241 if (access(buf, R_OK) == 0) {
242 pstrcpy(exec_dir, sizeof(exec_dir), buf);
246 char *qemu_get_exec_dir(void)
248 return g_strdup(exec_dir);
252 * The original implementation of g_poll from glib has a problem on Windows
253 * when using timeouts < 10 ms.
255 * Whenever g_poll is called with timeout < 10 ms, it does a quick poll instead
256 * of wait. This causes significant performance degradation of QEMU.
258 * The following code is a copy of the original code from glib/gpoll.c
259 * (glib commit 20f4d1820b8d4d0fc4447188e33efffd6d4a88d8 from 2014-02-19).
260 * Some debug code was removed and the code was reformatted.
261 * All other code modifications are marked with 'QEMU'.
265 * gpoll.c: poll(2) abstraction
266 * Copyright 1998 Owen Taylor
267 * Copyright 2008 Red Hat, Inc.
269 * This library is free software; you can redistribute it and/or
270 * modify it under the terms of the GNU Lesser General Public
271 * License as published by the Free Software Foundation; either
272 * version 2 of the License, or (at your option) any later version.
274 * This library is distributed in the hope that it will be useful,
275 * but WITHOUT ANY WARRANTY; without even the implied warranty of
276 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
277 * Lesser General Public License for more details.
279 * You should have received a copy of the GNU Lesser General Public
280 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
283 static int poll_rest(gboolean poll_msgs, HANDLE *handles, gint nhandles,
284 GPollFD *fds, guint nfds, gint timeout)
291 /* Wait for either messages or handles
292 * -> Use MsgWaitForMultipleObjectsEx
294 ready = MsgWaitForMultipleObjectsEx(nhandles, handles, timeout,
295 QS_ALLINPUT, MWMO_ALERTABLE);
297 if (ready == WAIT_FAILED) {
298 gchar *emsg = g_win32_error_message(GetLastError());
299 g_warning("MsgWaitForMultipleObjectsEx failed: %s", emsg);
302 } else if (nhandles == 0) {
303 /* No handles to wait for, just the timeout */
304 if (timeout == INFINITE) {
307 SleepEx(timeout, TRUE);
308 ready = WAIT_TIMEOUT;
311 /* Wait for just handles
312 * -> Use WaitForMultipleObjectsEx
315 WaitForMultipleObjectsEx(nhandles, handles, FALSE, timeout, TRUE);
316 if (ready == WAIT_FAILED) {
317 gchar *emsg = g_win32_error_message(GetLastError());
318 g_warning("WaitForMultipleObjectsEx failed: %s", emsg);
323 if (ready == WAIT_FAILED) {
325 } else if (ready == WAIT_TIMEOUT || ready == WAIT_IO_COMPLETION) {
327 } else if (poll_msgs && ready == WAIT_OBJECT_0 + nhandles) {
328 for (f = fds; f < &fds[nfds]; ++f) {
329 if (f->fd == G_WIN32_MSG_HANDLE && f->events & G_IO_IN) {
330 f->revents |= G_IO_IN;
334 /* If we have a timeout, or no handles to poll, be satisfied
335 * with just noticing we have messages waiting.
337 if (timeout != 0 || nhandles == 0) {
341 /* If no timeout and handles to poll, recurse to poll them,
344 recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
345 return (recursed_result == -1) ? -1 : 1 + recursed_result;
346 } else if (/* QEMU: removed the following unneeded statement which causes
347 * a compiler warning: ready >= WAIT_OBJECT_0 && */
348 ready < WAIT_OBJECT_0 + nhandles) {
349 for (f = fds; f < &fds[nfds]; ++f) {
350 if ((HANDLE) f->fd == handles[ready - WAIT_OBJECT_0]) {
351 f->revents = f->events;
355 /* If no timeout and polling several handles, recurse to poll
358 if (timeout == 0 && nhandles > 1) {
359 /* Remove the handle that fired */
361 if (ready < nhandles - 1) {
362 for (i = ready - WAIT_OBJECT_0 + 1; i < nhandles; i++) {
363 handles[i-1] = handles[i];
367 recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
368 return (recursed_result == -1) ? -1 : 1 + recursed_result;
376 gint g_poll(GPollFD *fds, guint nfds, gint timeout)
378 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
379 gboolean poll_msgs = FALSE;
384 for (f = fds; f < &fds[nfds]; ++f) {
385 if (f->fd == G_WIN32_MSG_HANDLE && (f->events & G_IO_IN)) {
387 } else if (f->fd > 0) {
388 /* Don't add the same handle several times into the array, as
389 * docs say that is not allowed, even if it actually does seem
394 for (i = 0; i < nhandles; i++) {
395 if (handles[i] == (HANDLE) f->fd) {
401 if (nhandles == MAXIMUM_WAIT_OBJECTS) {
402 g_warning("Too many handles to wait for!\n");
405 handles[nhandles++] = (HANDLE) f->fd;
411 for (f = fds; f < &fds[nfds]; ++f) {
419 /* Polling for several things? */
420 if (nhandles > 1 || (nhandles > 0 && poll_msgs)) {
421 /* First check if one or several of them are immediately
424 retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, 0);
426 /* If not, and we have a significant timeout, poll again with
427 * timeout then. Note that this will return indication for only
428 * one event, or only for messages. We ignore timeouts less than
429 * ten milliseconds as they are mostly pointless on Windows, the
430 * MsgWaitForMultipleObjectsEx() call will timeout right away
433 * Modification for QEMU: replaced timeout >= 10 by timeout > 0.
435 if (retval == 0 && (timeout == INFINITE || timeout > 0)) {
436 retval = poll_rest(poll_msgs, handles, nhandles,
440 /* Just polling for one thing, so no need to check first if
441 * available immediately
443 retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, timeout);
447 for (f = fds; f < &fds[nfds]; ++f) {
455 size_t getpagesize(void)
457 SYSTEM_INFO system_info;
459 GetSystemInfo(&system_info);
460 return system_info.dwPageSize;
463 void os_mem_prealloc(int fd, char *area, size_t memory)
466 size_t pagesize = getpagesize();
468 memory = (memory + pagesize - 1) & -pagesize;
469 for (i = 0; i < memory / pagesize; i++) {
470 memset(area + pagesize * i, 0, 1);
475 /* XXX: put correct support for win32 */
476 int qemu_read_password(char *buf, int buf_size)
480 printf("Password: ");
488 } else if (c == '\n') {
490 } else if (i < (buf_size - 1)) {