4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010-2016 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.
32 #include "qemu/osdep.h"
34 #include "qapi/error.h"
35 #include "sysemu/sysemu.h"
36 #include "qemu/main-loop.h"
38 #include "qemu/sockets.h"
39 #include "qemu/cutils.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 #ifndef CONFIG_LOCALTIME_R
99 /* FIXME: add proper locking */
100 struct tm *gmtime_r(const time_t *timep, struct tm *result)
102 struct tm *p = gmtime(timep);
103 memset(result, 0, sizeof(*result));
111 /* FIXME: add proper locking */
112 struct tm *localtime_r(const time_t *timep, struct tm *result)
114 struct tm *p = localtime(timep);
115 memset(result, 0, sizeof(*result));
122 #endif /* CONFIG_LOCALTIME_R */
124 void qemu_set_block(int fd)
126 unsigned long opt = 0;
127 WSAEventSelect(fd, NULL, 0);
128 ioctlsocket(fd, FIONBIO, &opt);
131 void qemu_set_nonblock(int fd)
133 unsigned long opt = 1;
134 ioctlsocket(fd, FIONBIO, &opt);
135 qemu_fd_register(fd);
138 int socket_set_fast_reuse(int fd)
140 /* Enabling the reuse of an endpoint that was used by a socket still in
141 * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
142 * fast reuse is the default and SO_REUSEADDR does strange things. So we
143 * don't have to do anything here. More info can be found at:
144 * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
149 static int socket_error(void)
151 switch (WSAGetLastError()) {
158 case WSA_INVALID_HANDLE:
160 case WSA_NOT_ENOUGH_MEMORY:
162 case WSA_INVALID_PARAMETER:
164 case WSAENAMETOOLONG:
169 /* not using EWOULDBLOCK as we don't want code to have
170 * to check both EWOULDBLOCK and EAGAIN */
178 case WSAEDESTADDRREQ:
186 case WSAEPROTONOSUPPORT:
187 return EPROTONOSUPPORT;
190 case WSAEAFNOSUPPORT:
194 case WSAEADDRNOTAVAIL:
195 return EADDRNOTAVAIL;
202 case WSAECONNABORTED:
214 case WSAECONNREFUSED:
218 case WSAEHOSTUNREACH:
225 int inet_aton(const char *cp, struct in_addr *ia)
227 uint32_t addr = inet_addr(cp);
228 if (addr == 0xffffffff) {
235 void qemu_set_cloexec(int fd)
239 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
240 #define _W32_FT_OFFSET (116444736000000000ULL)
242 int qemu_gettimeofday(qemu_timeval *tp)
245 unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
250 GetSystemTimeAsFileTime (&_now.ft);
251 tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
252 tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
254 /* Always return 0 as per Open Group Base Specifications Issue 6.
255 Do not set errno on error. */
259 int qemu_get_thread_id(void)
261 return GetCurrentThreadId();
265 qemu_get_local_state_pathname(const char *relative_pathname)
268 char base_path[MAX_PATH+1] = "";
270 result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
271 /* SHGFP_TYPE_CURRENT */ 0, base_path);
272 if (result != S_OK) {
273 /* misconfigured environment */
274 g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
277 return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
281 void qemu_set_tty_echo(int fd, bool echo)
283 HANDLE handle = (HANDLE)_get_osfhandle(fd);
286 if (handle == INVALID_HANDLE_VALUE) {
290 GetConsoleMode(handle, &dwMode);
293 SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
295 SetConsoleMode(handle,
296 dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
300 static char exec_dir[PATH_MAX];
302 void qemu_init_exec_dir(const char *argv0)
309 len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
316 while (p != buf && *p != '\\') {
320 if (access(buf, R_OK) == 0) {
321 pstrcpy(exec_dir, sizeof(exec_dir), buf);
325 char *qemu_get_exec_dir(void)
327 return g_strdup(exec_dir);
331 * The original implementation of g_poll from glib has a problem on Windows
332 * when using timeouts < 10 ms.
334 * Whenever g_poll is called with timeout < 10 ms, it does a quick poll instead
335 * of wait. This causes significant performance degradation of QEMU.
337 * The following code is a copy of the original code from glib/gpoll.c
338 * (glib commit 20f4d1820b8d4d0fc4447188e33efffd6d4a88d8 from 2014-02-19).
339 * Some debug code was removed and the code was reformatted.
340 * All other code modifications are marked with 'QEMU'.
344 * gpoll.c: poll(2) abstraction
345 * Copyright 1998 Owen Taylor
346 * Copyright 2008 Red Hat, Inc.
348 * This library is free software; you can redistribute it and/or
349 * modify it under the terms of the GNU Lesser General Public
350 * License as published by the Free Software Foundation; either
351 * version 2 of the License, or (at your option) any later version.
353 * This library is distributed in the hope that it will be useful,
354 * but WITHOUT ANY WARRANTY; without even the implied warranty of
355 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
356 * Lesser General Public License for more details.
358 * You should have received a copy of the GNU Lesser General Public
359 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
362 static int poll_rest(gboolean poll_msgs, HANDLE *handles, gint nhandles,
363 GPollFD *fds, guint nfds, gint timeout)
370 /* Wait for either messages or handles
371 * -> Use MsgWaitForMultipleObjectsEx
373 ready = MsgWaitForMultipleObjectsEx(nhandles, handles, timeout,
374 QS_ALLINPUT, MWMO_ALERTABLE);
376 if (ready == WAIT_FAILED) {
377 gchar *emsg = g_win32_error_message(GetLastError());
378 g_warning("MsgWaitForMultipleObjectsEx failed: %s", emsg);
381 } else if (nhandles == 0) {
382 /* No handles to wait for, just the timeout */
383 if (timeout == INFINITE) {
386 SleepEx(timeout, TRUE);
387 ready = WAIT_TIMEOUT;
390 /* Wait for just handles
391 * -> Use WaitForMultipleObjectsEx
394 WaitForMultipleObjectsEx(nhandles, handles, FALSE, timeout, TRUE);
395 if (ready == WAIT_FAILED) {
396 gchar *emsg = g_win32_error_message(GetLastError());
397 g_warning("WaitForMultipleObjectsEx failed: %s", emsg);
402 if (ready == WAIT_FAILED) {
404 } else if (ready == WAIT_TIMEOUT || ready == WAIT_IO_COMPLETION) {
406 } else if (poll_msgs && ready == WAIT_OBJECT_0 + nhandles) {
407 for (f = fds; f < &fds[nfds]; ++f) {
408 if (f->fd == G_WIN32_MSG_HANDLE && f->events & G_IO_IN) {
409 f->revents |= G_IO_IN;
413 /* If we have a timeout, or no handles to poll, be satisfied
414 * with just noticing we have messages waiting.
416 if (timeout != 0 || nhandles == 0) {
420 /* If no timeout and handles to poll, recurse to poll them,
423 recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
424 return (recursed_result == -1) ? -1 : 1 + recursed_result;
425 } else if (/* QEMU: removed the following unneeded statement which causes
426 * a compiler warning: ready >= WAIT_OBJECT_0 && */
427 ready < WAIT_OBJECT_0 + nhandles) {
428 for (f = fds; f < &fds[nfds]; ++f) {
429 if ((HANDLE) f->fd == handles[ready - WAIT_OBJECT_0]) {
430 f->revents = f->events;
434 /* If no timeout and polling several handles, recurse to poll
437 if (timeout == 0 && nhandles > 1) {
438 /* Remove the handle that fired */
440 if (ready < nhandles - 1) {
441 for (i = ready - WAIT_OBJECT_0 + 1; i < nhandles; i++) {
442 handles[i-1] = handles[i];
446 recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
447 return (recursed_result == -1) ? -1 : 1 + recursed_result;
455 gint g_poll(GPollFD *fds, guint nfds, gint timeout)
457 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
458 gboolean poll_msgs = FALSE;
463 for (f = fds; f < &fds[nfds]; ++f) {
464 if (f->fd == G_WIN32_MSG_HANDLE && (f->events & G_IO_IN)) {
466 } else if (f->fd > 0) {
467 /* Don't add the same handle several times into the array, as
468 * docs say that is not allowed, even if it actually does seem
473 for (i = 0; i < nhandles; i++) {
474 if (handles[i] == (HANDLE) f->fd) {
480 if (nhandles == MAXIMUM_WAIT_OBJECTS) {
481 g_warning("Too many handles to wait for!\n");
484 handles[nhandles++] = (HANDLE) f->fd;
490 for (f = fds; f < &fds[nfds]; ++f) {
498 /* Polling for several things? */
499 if (nhandles > 1 || (nhandles > 0 && poll_msgs)) {
500 /* First check if one or several of them are immediately
503 retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, 0);
505 /* If not, and we have a significant timeout, poll again with
506 * timeout then. Note that this will return indication for only
507 * one event, or only for messages. We ignore timeouts less than
508 * ten milliseconds as they are mostly pointless on Windows, the
509 * MsgWaitForMultipleObjectsEx() call will timeout right away
512 * Modification for QEMU: replaced timeout >= 10 by timeout > 0.
514 if (retval == 0 && (timeout == INFINITE || timeout > 0)) {
515 retval = poll_rest(poll_msgs, handles, nhandles,
519 /* Just polling for one thing, so no need to check first if
520 * available immediately
522 retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, timeout);
526 for (f = fds; f < &fds[nfds]; ++f) {
534 int getpagesize(void)
536 SYSTEM_INFO system_info;
538 GetSystemInfo(&system_info);
539 return system_info.dwPageSize;
542 void os_mem_prealloc(int fd, char *area, size_t memory, Error **errp)
545 size_t pagesize = getpagesize();
547 memory = (memory + pagesize - 1) & -pagesize;
548 for (i = 0; i < memory / pagesize; i++) {
549 memset(area + pagesize * i, 0, 1);
554 /* XXX: put correct support for win32 */
555 int qemu_read_password(char *buf, int buf_size)
559 printf("Password: ");
567 } else if (c == '\n') {
569 } else if (i < (buf_size - 1)) {
578 char *qemu_get_pid_name(pid_t pid)
580 /* XXX Implement me */
585 pid_t qemu_fork(Error **errp)
588 error_setg_errno(errp, errno,
589 "cannot fork child process");
595 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
599 ret = connect(sockfd, addr, addrlen);
601 errno = socket_error();
608 int qemu_listen_wrap(int sockfd, int backlog)
611 ret = listen(sockfd, backlog);
613 errno = socket_error();
620 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
624 ret = bind(sockfd, addr, addrlen);
626 errno = socket_error();
633 int qemu_socket_wrap(int domain, int type, int protocol)
636 ret = socket(domain, type, protocol);
638 errno = socket_error();
645 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
649 ret = accept(sockfd, addr, addrlen);
651 errno = socket_error();
658 int qemu_shutdown_wrap(int sockfd, int how)
661 ret = shutdown(sockfd, how);
663 errno = socket_error();
670 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
673 ret = ioctlsocket(fd, req, val);
675 errno = socket_error();
682 int qemu_closesocket_wrap(int fd)
685 ret = closesocket(fd);
687 errno = socket_error();
694 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
695 void *optval, socklen_t *optlen)
698 ret = getsockopt(sockfd, level, optname, optval, optlen);
700 errno = socket_error();
707 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
708 const void *optval, socklen_t optlen)
711 ret = setsockopt(sockfd, level, optname, optval, optlen);
713 errno = socket_error();
720 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
724 ret = getpeername(sockfd, addr, addrlen);
726 errno = socket_error();
733 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
737 ret = getsockname(sockfd, addr, addrlen);
739 errno = socket_error();
746 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
749 ret = send(sockfd, buf, len, flags);
751 errno = socket_error();
758 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
759 const struct sockaddr *addr, socklen_t addrlen)
762 ret = sendto(sockfd, buf, len, flags, addr, addrlen);
764 errno = socket_error();
771 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
774 ret = recv(sockfd, buf, len, flags);
776 errno = socket_error();
783 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
784 struct sockaddr *addr, socklen_t *addrlen)
787 ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
789 errno = socket_error();