4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 Red Hat, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
32 #include "config-host.h"
34 #include "qemu-options.h"
36 /***********************************************************/
37 /* Functions missing in mingw */
39 int setenv(const char *name, const char *value, int overwrite)
42 if (overwrite || !getenv(name)) {
43 size_t length = strlen(name) + strlen(value) + 2;
44 char *string = qemu_malloc(length);
45 snprintf(string, length, "%s=%s", name, value);
46 result = putenv(string);
51 /***********************************************************/
52 /* Polling handling */
54 typedef struct PollingEntry {
57 struct PollingEntry *next;
60 static PollingEntry *first_polling_entry;
62 int qemu_add_polling_cb(PollingFunc *func, void *opaque)
64 PollingEntry **ppe, *pe;
65 pe = qemu_mallocz(sizeof(PollingEntry));
68 for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next);
73 void qemu_del_polling_cb(PollingFunc *func, void *opaque)
75 PollingEntry **ppe, *pe;
76 for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) {
78 if (pe->func == func && pe->opaque == opaque) {
86 /***********************************************************/
87 /* Wait objects support */
88 typedef struct WaitObjects {
90 HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
91 WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
92 void *opaque[MAXIMUM_WAIT_OBJECTS + 1];
95 static WaitObjects wait_objects = {0};
97 int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
99 WaitObjects *w = &wait_objects;
101 if (w->num >= MAXIMUM_WAIT_OBJECTS)
103 w->events[w->num] = handle;
104 w->func[w->num] = func;
105 w->opaque[w->num] = opaque;
110 void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
113 WaitObjects *w = &wait_objects;
116 for (i = 0; i < w->num; i++) {
117 if (w->events[i] == handle)
120 w->events[i] = w->events[i + 1];
121 w->func[i] = w->func[i + 1];
122 w->opaque[i] = w->opaque[i + 1];
129 void os_host_main_loop_wait(int *timeout)
134 /* XXX: need to suppress polling by better using win32 events */
136 for(pe = first_polling_entry; pe != NULL; pe = pe->next) {
137 ret |= pe->func(pe->opaque);
141 WaitObjects *w = &wait_objects;
143 ret = WaitForMultipleObjects(w->num, w->events, FALSE, *timeout);
144 if (WAIT_OBJECT_0 + 0 <= ret && ret <= WAIT_OBJECT_0 + w->num - 1) {
145 if (w->func[ret - WAIT_OBJECT_0])
146 w->func[ret - WAIT_OBJECT_0](w->opaque[ret - WAIT_OBJECT_0]);
148 /* Check for additional signaled events */
149 for(i = (ret - WAIT_OBJECT_0 + 1); i < w->num; i++) {
151 /* Check if event is signaled */
152 ret2 = WaitForSingleObject(w->events[i], 0);
153 if(ret2 == WAIT_OBJECT_0) {
155 w->func[i](w->opaque[i]);
156 } else if (ret2 == WAIT_TIMEOUT) {
158 err = GetLastError();
159 fprintf(stderr, "WaitForSingleObject error %d %d\n", i, err);
162 } else if (ret == WAIT_TIMEOUT) {
164 err = GetLastError();
165 fprintf(stderr, "WaitForMultipleObjects error %d %d\n", ret, err);
172 static BOOL WINAPI qemu_ctrl_handler(DWORD type)
174 exit(STATUS_CONTROL_C_EXIT);
178 void os_setup_early_signal_handling(void)
180 /* Note: cpu_interrupt() is currently not SMP safe, so we force
181 QEMU to run on a single CPU */
186 SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
188 h = GetCurrentProcess();
189 if (GetProcessAffinityMask(h, &mask, &smask)) {
190 for(i = 0; i < 32; i++) {
196 SetProcessAffinityMask(h, mask);
201 /* Look for support files in the same directory as the executable. */
202 char *os_find_datadir(const char *argv0)
208 len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
215 while (p != buf && *p != '\\')
218 if (access(buf, R_OK) == 0) {
219 return qemu_strdup(buf);
224 void os_set_line_buffering(void)
226 setbuf(stdout, NULL);
227 setbuf(stderr, NULL);
231 * Parse OS specific command line options.
232 * return 0 if option handled, -1 otherwise
234 void os_parse_cmd_args(int index, const char *optarg)
239 void os_pidfile_error(void)
241 fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
244 int qemu_create_pidfile(const char *filename)
251 memset(&overlap, 0, sizeof(overlap));
253 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
254 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
256 if (file == INVALID_HANDLE_VALUE) {
259 len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
260 ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,