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68396ea @rmustacc Initial commit of d32e8d0b8d9e0ef7cf7ab2e74548982972789dfc from qemu-kvm
rmustacc authored
1 /*
2 * os-win32.c
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 Red Hat, Inc.
6 *
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:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
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
23 * THE SOFTWARE.
24 */
25 #include <windows.h>
26 #include <unistd.h>
27 #include <fcntl.h>
28 #include <signal.h>
29 #include <time.h>
30 #include <errno.h>
31 #include <sys/time.h>
32 #include "config-host.h"
33 #include "sysemu.h"
34 #include "qemu-options.h"
35
36 /***********************************************************/
37 /* Functions missing in mingw */
38
39 int setenv(const char *name, const char *value, int overwrite)
40 {
41 int result = 0;
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);
47 }
48 return result;
49 }
50
51 /***********************************************************/
52 /* Polling handling */
53
54 typedef struct PollingEntry {
55 PollingFunc *func;
56 void *opaque;
57 struct PollingEntry *next;
58 } PollingEntry;
59
60 static PollingEntry *first_polling_entry;
61
62 int qemu_add_polling_cb(PollingFunc *func, void *opaque)
63 {
64 PollingEntry **ppe, *pe;
65 pe = qemu_mallocz(sizeof(PollingEntry));
66 pe->func = func;
67 pe->opaque = opaque;
68 for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next);
69 *ppe = pe;
70 return 0;
71 }
72
73 void qemu_del_polling_cb(PollingFunc *func, void *opaque)
74 {
75 PollingEntry **ppe, *pe;
76 for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) {
77 pe = *ppe;
78 if (pe->func == func && pe->opaque == opaque) {
79 *ppe = pe->next;
80 qemu_free(pe);
81 break;
82 }
83 }
84 }
85
86 /***********************************************************/
87 /* Wait objects support */
88 typedef struct WaitObjects {
89 int num;
90 HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
91 WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
92 void *opaque[MAXIMUM_WAIT_OBJECTS + 1];
93 } WaitObjects;
94
95 static WaitObjects wait_objects = {0};
96
97 int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
98 {
99 WaitObjects *w = &wait_objects;
100
101 if (w->num >= MAXIMUM_WAIT_OBJECTS)
102 return -1;
103 w->events[w->num] = handle;
104 w->func[w->num] = func;
105 w->opaque[w->num] = opaque;
106 w->num++;
107 return 0;
108 }
109
110 void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
111 {
112 int i, found;
113 WaitObjects *w = &wait_objects;
114
115 found = 0;
116 for (i = 0; i < w->num; i++) {
117 if (w->events[i] == handle)
118 found = 1;
119 if (found) {
120 w->events[i] = w->events[i + 1];
121 w->func[i] = w->func[i + 1];
122 w->opaque[i] = w->opaque[i + 1];
123 }
124 }
125 if (found)
126 w->num--;
127 }
128
129 void os_host_main_loop_wait(int *timeout)
130 {
131 int ret, ret2, i;
132 PollingEntry *pe;
133
134 /* XXX: need to suppress polling by better using win32 events */
135 ret = 0;
136 for(pe = first_polling_entry; pe != NULL; pe = pe->next) {
137 ret |= pe->func(pe->opaque);
138 }
139 if (ret == 0) {
140 int err;
141 WaitObjects *w = &wait_objects;
142
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]);
147
148 /* Check for additional signaled events */
149 for(i = (ret - WAIT_OBJECT_0 + 1); i < w->num; i++) {
150
151 /* Check if event is signaled */
152 ret2 = WaitForSingleObject(w->events[i], 0);
153 if(ret2 == WAIT_OBJECT_0) {
154 if (w->func[i])
155 w->func[i](w->opaque[i]);
156 } else if (ret2 == WAIT_TIMEOUT) {
157 } else {
158 err = GetLastError();
159 fprintf(stderr, "WaitForSingleObject error %d %d\n", i, err);
160 }
161 }
162 } else if (ret == WAIT_TIMEOUT) {
163 } else {
164 err = GetLastError();
165 fprintf(stderr, "WaitForMultipleObjects error %d %d\n", ret, err);
166 }
167 }
168
169 *timeout = 0;
170 }
171
172 static BOOL WINAPI qemu_ctrl_handler(DWORD type)
173 {
174 exit(STATUS_CONTROL_C_EXIT);
175 return TRUE;
176 }
177
178 void os_setup_early_signal_handling(void)
179 {
180 /* Note: cpu_interrupt() is currently not SMP safe, so we force
181 QEMU to run on a single CPU */
182 HANDLE h;
183 DWORD mask, smask;
184 int i;
185
186 SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
187
188 h = GetCurrentProcess();
189 if (GetProcessAffinityMask(h, &mask, &smask)) {
190 for(i = 0; i < 32; i++) {
191 if (mask & (1 << i))
192 break;
193 }
194 if (i != 32) {
195 mask = 1 << i;
196 SetProcessAffinityMask(h, mask);
197 }
198 }
199 }
200
201 /* Look for support files in the same directory as the executable. */
202 char *os_find_datadir(const char *argv0)
203 {
204 char *p;
205 char buf[MAX_PATH];
206 DWORD len;
207
208 len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
209 if (len == 0) {
210 return NULL;
211 }
212
213 buf[len] = 0;
214 p = buf + len - 1;
215 while (p != buf && *p != '\\')
216 p--;
217 *p = 0;
218 if (access(buf, R_OK) == 0) {
219 return qemu_strdup(buf);
220 }
221 return NULL;
222 }
223
224 void os_set_line_buffering(void)
225 {
226 setbuf(stdout, NULL);
227 setbuf(stderr, NULL);
228 }
229
230 /*
231 * Parse OS specific command line options.
232 * return 0 if option handled, -1 otherwise
233 */
234 void os_parse_cmd_args(int index, const char *optarg)
235 {
236 return;
237 }
238
239 void os_pidfile_error(void)
240 {
241 fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
242 }
243
244 int qemu_create_pidfile(const char *filename)
245 {
246 char buffer[128];
247 int len;
248 HANDLE file;
249 OVERLAPPED overlap;
250 BOOL ret;
251 memset(&overlap, 0, sizeof(overlap));
252
253 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
254 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
255
256 if (file == INVALID_HANDLE_VALUE) {
257 return -1;
258 }
259 len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
260 ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
261 &overlap, NULL);
262 if (ret == 0) {
263 return -1;
264 }
265 return 0;
266 }
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