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.
33 #include "qemu/osdep.h"
35 #include "qemu-common.h"
36 #include "qapi/error.h"
37 #include "sysemu/sysemu.h"
38 #include "qemu/main-loop.h"
40 #include "qemu/sockets.h"
41 #include "qemu/cutils.h"
43 /* this must come after including "trace.h" */
46 void *qemu_oom_check(void *ptr)
49 fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
55 void *qemu_try_memalign(size_t alignment, size_t size)
62 ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
63 trace_qemu_memalign(alignment, size, ptr);
67 void *qemu_memalign(size_t alignment, size_t size)
69 return qemu_oom_check(qemu_try_memalign(alignment, size));
72 static int get_allocation_granularity(void)
74 SYSTEM_INFO system_info;
76 GetSystemInfo(&system_info);
77 return system_info.dwAllocationGranularity;
80 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared)
84 ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
85 trace_qemu_anon_ram_alloc(size, ptr);
88 *align = MAX(get_allocation_granularity(), getpagesize());
93 void qemu_vfree(void *ptr)
95 trace_qemu_vfree(ptr);
97 VirtualFree(ptr, 0, MEM_RELEASE);
101 void qemu_anon_ram_free(void *ptr, size_t size)
103 trace_qemu_anon_ram_free(ptr, size);
105 VirtualFree(ptr, 0, MEM_RELEASE);
109 #ifndef CONFIG_LOCALTIME_R
110 /* FIXME: add proper locking */
111 struct tm *gmtime_r(const time_t *timep, struct tm *result)
113 struct tm *p = gmtime(timep);
114 memset(result, 0, sizeof(*result));
122 /* FIXME: add proper locking */
123 struct tm *localtime_r(const time_t *timep, struct tm *result)
125 struct tm *p = localtime(timep);
126 memset(result, 0, sizeof(*result));
133 #endif /* CONFIG_LOCALTIME_R */
135 static int socket_error(void)
137 switch (WSAGetLastError()) {
144 case WSA_INVALID_HANDLE:
146 case WSA_NOT_ENOUGH_MEMORY:
148 case WSA_INVALID_PARAMETER:
150 case WSAENAMETOOLONG:
155 /* not using EWOULDBLOCK as we don't want code to have
156 * to check both EWOULDBLOCK and EAGAIN */
164 case WSAEDESTADDRREQ:
172 case WSAEPROTONOSUPPORT:
173 return EPROTONOSUPPORT;
176 case WSAEAFNOSUPPORT:
180 case WSAEADDRNOTAVAIL:
181 return EADDRNOTAVAIL;
188 case WSAECONNABORTED:
200 case WSAECONNREFUSED:
204 case WSAEHOSTUNREACH:
211 void qemu_set_block(int fd)
213 unsigned long opt = 0;
214 WSAEventSelect(fd, NULL, 0);
215 ioctlsocket(fd, FIONBIO, &opt);
218 int qemu_try_set_nonblock(int fd)
220 unsigned long opt = 1;
221 if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
222 return -socket_error();
224 qemu_fd_register(fd);
228 void qemu_set_nonblock(int fd)
230 (void)qemu_try_set_nonblock(fd);
233 int socket_set_fast_reuse(int fd)
235 /* Enabling the reuse of an endpoint that was used by a socket still in
236 * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
237 * fast reuse is the default and SO_REUSEADDR does strange things. So we
238 * don't have to do anything here. More info can be found at:
239 * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
243 int inet_aton(const char *cp, struct in_addr *ia)
245 uint32_t addr = inet_addr(cp);
246 if (addr == 0xffffffff) {
253 void qemu_set_cloexec(int fd)
257 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
258 #define _W32_FT_OFFSET (116444736000000000ULL)
260 int qemu_gettimeofday(qemu_timeval *tp)
263 unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
268 GetSystemTimeAsFileTime (&_now.ft);
269 tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
270 tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
272 /* Always return 0 as per Open Group Base Specifications Issue 6.
273 Do not set errno on error. */
277 int qemu_get_thread_id(void)
279 return GetCurrentThreadId();
283 qemu_get_local_state_pathname(const char *relative_pathname)
286 char base_path[MAX_PATH+1] = "";
288 result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
289 /* SHGFP_TYPE_CURRENT */ 0, base_path);
290 if (result != S_OK) {
291 /* misconfigured environment */
292 g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
295 return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
299 void qemu_set_tty_echo(int fd, bool echo)
301 HANDLE handle = (HANDLE)_get_osfhandle(fd);
304 if (handle == INVALID_HANDLE_VALUE) {
308 GetConsoleMode(handle, &dwMode);
311 SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
313 SetConsoleMode(handle,
314 dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
318 static char exec_dir[PATH_MAX];
320 void qemu_init_exec_dir(const char *argv0)
327 len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
334 while (p != buf && *p != '\\') {
338 if (access(buf, R_OK) == 0) {
339 pstrcpy(exec_dir, sizeof(exec_dir), buf);
343 char *qemu_get_exec_dir(void)
345 return g_strdup(exec_dir);
348 #if !GLIB_CHECK_VERSION(2, 50, 0)
350 * The original implementation of g_poll from glib has a problem on Windows
351 * when using timeouts < 10 ms.
353 * Whenever g_poll is called with timeout < 10 ms, it does a quick poll instead
354 * of wait. This causes significant performance degradation of QEMU.
356 * The following code is a copy of the original code from glib/gpoll.c
357 * (glib commit 20f4d1820b8d4d0fc4447188e33efffd6d4a88d8 from 2014-02-19).
358 * Some debug code was removed and the code was reformatted.
359 * All other code modifications are marked with 'QEMU'.
363 * gpoll.c: poll(2) abstraction
364 * Copyright 1998 Owen Taylor
365 * Copyright 2008 Red Hat, Inc.
367 * This library is free software; you can redistribute it and/or
368 * modify it under the terms of the GNU Lesser General Public
369 * License as published by the Free Software Foundation; either
370 * version 2 of the License, or (at your option) any later version.
372 * This library is distributed in the hope that it will be useful,
373 * but WITHOUT ANY WARRANTY; without even the implied warranty of
374 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
375 * Lesser General Public License for more details.
377 * You should have received a copy of the GNU Lesser General Public
378 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
381 static int poll_rest(gboolean poll_msgs, HANDLE *handles, gint nhandles,
382 GPollFD *fds, guint nfds, gint timeout)
389 /* Wait for either messages or handles
390 * -> Use MsgWaitForMultipleObjectsEx
392 ready = MsgWaitForMultipleObjectsEx(nhandles, handles, timeout,
393 QS_ALLINPUT, MWMO_ALERTABLE);
395 if (ready == WAIT_FAILED) {
396 gchar *emsg = g_win32_error_message(GetLastError());
397 g_warning("MsgWaitForMultipleObjectsEx failed: %s", emsg);
400 } else if (nhandles == 0) {
401 /* No handles to wait for, just the timeout */
402 if (timeout == INFINITE) {
405 SleepEx(timeout, TRUE);
406 ready = WAIT_TIMEOUT;
409 /* Wait for just handles
410 * -> Use WaitForMultipleObjectsEx
413 WaitForMultipleObjectsEx(nhandles, handles, FALSE, timeout, TRUE);
414 if (ready == WAIT_FAILED) {
415 gchar *emsg = g_win32_error_message(GetLastError());
416 g_warning("WaitForMultipleObjectsEx failed: %s", emsg);
421 if (ready == WAIT_FAILED) {
423 } else if (ready == WAIT_TIMEOUT || ready == WAIT_IO_COMPLETION) {
425 } else if (poll_msgs && ready == WAIT_OBJECT_0 + nhandles) {
426 for (f = fds; f < &fds[nfds]; ++f) {
427 if (f->fd == G_WIN32_MSG_HANDLE && f->events & G_IO_IN) {
428 f->revents |= G_IO_IN;
432 /* If we have a timeout, or no handles to poll, be satisfied
433 * with just noticing we have messages waiting.
435 if (timeout != 0 || nhandles == 0) {
439 /* If no timeout and handles to poll, recurse to poll them,
442 recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
443 return (recursed_result == -1) ? -1 : 1 + recursed_result;
444 } else if (/* QEMU: removed the following unneeded statement which causes
445 * a compiler warning: ready >= WAIT_OBJECT_0 && */
446 ready < WAIT_OBJECT_0 + nhandles) {
447 for (f = fds; f < &fds[nfds]; ++f) {
448 if ((HANDLE) f->fd == handles[ready - WAIT_OBJECT_0]) {
449 f->revents = f->events;
453 /* If no timeout and polling several handles, recurse to poll
456 if (timeout == 0 && nhandles > 1) {
457 /* Remove the handle that fired */
459 for (i = ready - WAIT_OBJECT_0 + 1; i < nhandles; i++) {
460 handles[i-1] = handles[i];
463 recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
464 return (recursed_result == -1) ? -1 : 1 + recursed_result;
472 gint g_poll(GPollFD *fds, guint nfds, gint timeout)
474 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
475 gboolean poll_msgs = FALSE;
480 for (f = fds; f < &fds[nfds]; ++f) {
481 if (f->fd == G_WIN32_MSG_HANDLE && (f->events & G_IO_IN)) {
483 } else if (f->fd > 0) {
484 /* Don't add the same handle several times into the array, as
485 * docs say that is not allowed, even if it actually does seem
490 for (i = 0; i < nhandles; i++) {
491 if (handles[i] == (HANDLE) f->fd) {
497 if (nhandles == MAXIMUM_WAIT_OBJECTS) {
498 g_warning("Too many handles to wait for!\n");
501 handles[nhandles++] = (HANDLE) f->fd;
507 for (f = fds; f < &fds[nfds]; ++f) {
515 /* Polling for several things? */
516 if (nhandles > 1 || (nhandles > 0 && poll_msgs)) {
517 /* First check if one or several of them are immediately
520 retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, 0);
522 /* If not, and we have a significant timeout, poll again with
523 * timeout then. Note that this will return indication for only
524 * one event, or only for messages. We ignore timeouts less than
525 * ten milliseconds as they are mostly pointless on Windows, the
526 * MsgWaitForMultipleObjectsEx() call will timeout right away
529 * Modification for QEMU: replaced timeout >= 10 by timeout > 0.
531 if (retval == 0 && (timeout == INFINITE || timeout > 0)) {
532 retval = poll_rest(poll_msgs, handles, nhandles,
536 /* Just polling for one thing, so no need to check first if
537 * available immediately
539 retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, timeout);
543 for (f = fds; f < &fds[nfds]; ++f) {
552 int getpagesize(void)
554 SYSTEM_INFO system_info;
556 GetSystemInfo(&system_info);
557 return system_info.dwPageSize;
560 void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
564 size_t pagesize = qemu_real_host_page_size;
566 memory = (memory + pagesize - 1) & -pagesize;
567 for (i = 0; i < memory / pagesize; i++) {
568 memset(area + pagesize * i, 0, 1);
572 char *qemu_get_pid_name(pid_t pid)
574 /* XXX Implement me */
579 pid_t qemu_fork(Error **errp)
582 error_setg_errno(errp, errno,
583 "cannot fork child process");
589 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
593 ret = connect(sockfd, addr, addrlen);
595 if (WSAGetLastError() == WSAEWOULDBLOCK) {
598 errno = socket_error();
606 int qemu_listen_wrap(int sockfd, int backlog)
609 ret = listen(sockfd, backlog);
611 errno = socket_error();
618 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
622 ret = bind(sockfd, addr, addrlen);
624 errno = socket_error();
631 int qemu_socket_wrap(int domain, int type, int protocol)
634 ret = socket(domain, type, protocol);
636 errno = socket_error();
643 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
647 ret = accept(sockfd, addr, addrlen);
649 errno = socket_error();
656 int qemu_shutdown_wrap(int sockfd, int how)
659 ret = shutdown(sockfd, how);
661 errno = socket_error();
668 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
671 ret = ioctlsocket(fd, req, val);
673 errno = socket_error();
680 int qemu_closesocket_wrap(int fd)
683 ret = closesocket(fd);
685 errno = socket_error();
692 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
693 void *optval, socklen_t *optlen)
696 ret = getsockopt(sockfd, level, optname, optval, optlen);
698 errno = socket_error();
705 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
706 const void *optval, socklen_t optlen)
709 ret = setsockopt(sockfd, level, optname, optval, optlen);
711 errno = socket_error();
718 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
722 ret = getpeername(sockfd, addr, addrlen);
724 errno = socket_error();
731 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
735 ret = getsockname(sockfd, addr, addrlen);
737 errno = socket_error();
744 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
747 ret = send(sockfd, buf, len, flags);
749 errno = socket_error();
756 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
757 const struct sockaddr *addr, socklen_t addrlen)
760 ret = sendto(sockfd, buf, len, flags, addr, addrlen);
762 errno = socket_error();
769 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
772 ret = recv(sockfd, buf, len, flags);
774 errno = socket_error();
781 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
782 struct sockaddr *addr, socklen_t *addrlen)
785 ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
787 errno = socket_error();
792 bool qemu_write_pidfile(const char *filename, Error **errp)
799 memset(&overlap, 0, sizeof(overlap));
801 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
802 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
804 if (file == INVALID_HANDLE_VALUE) {
805 error_setg(errp, "Failed to create PID file");
808 len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
809 ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
813 error_setg(errp, "Failed to write PID file");
819 char *qemu_get_host_name(Error **errp)
821 wchar_t tmp[MAX_COMPUTERNAME_LENGTH + 1];
822 DWORD size = G_N_ELEMENTS(tmp);
824 if (GetComputerNameW(tmp, &size) == 0) {
825 error_setg_win32(errp, GetLastError(), "failed close handle");
829 return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL);
832 size_t qemu_get_host_physmem(void)
834 MEMORYSTATUSEX statex;
835 statex.dwLength = sizeof(statex);
837 if (GlobalMemoryStatusEx(&statex)) {
838 return statex.ullTotalPhys;