Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging
[qemu.git] / os-win32.c
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
26 #include "qemu/osdep.h"
27 #include <windows.h>
28 #include <mmsystem.h>
29 #include "qemu-common.h"
30 #include "qemu-options.h"
31 #include "sysemu/runstate.h"
32
33 /***********************************************************/
34 /* Functions missing in mingw */
35
36 int setenv(const char *name, const char *value, int overwrite)
37 {
38 int result = 0;
39 if (overwrite || !getenv(name)) {
40 size_t length = strlen(name) + strlen(value) + 2;
41 char *string = g_malloc(length);
42 snprintf(string, length, "%s=%s", name, value);
43 result = putenv(string);
44
45 /* Windows takes a copy and does not continue to use our string.
46 * Therefore it can be safely freed on this platform. POSIX code
47 * typically has to leak the string because according to the spec it
48 * becomes part of the environment.
49 */
50 g_free(string);
51 }
52 return result;
53 }
54
55 static BOOL WINAPI qemu_ctrl_handler(DWORD type)
56 {
57 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_SIGNAL);
58 /* Windows 7 kills application when the function returns.
59 Sleep here to give QEMU a try for closing.
60 Sleep period is 10000ms because Windows kills the program
61 after 10 seconds anyway. */
62 Sleep(10000);
63
64 return TRUE;
65 }
66
67 static TIMECAPS mm_tc;
68
69 static void os_undo_timer_resolution(void)
70 {
71 timeEndPeriod(mm_tc.wPeriodMin);
72 }
73
74 void os_setup_early_signal_handling(void)
75 {
76 SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
77 timeGetDevCaps(&mm_tc, sizeof(mm_tc));
78 timeBeginPeriod(mm_tc.wPeriodMin);
79 atexit(os_undo_timer_resolution);
80 }
81
82 /* Look for support files in the same directory as the executable. */
83 char *os_find_datadir(void)
84 {
85 return qemu_get_exec_dir();
86 }
87
88 void os_set_line_buffering(void)
89 {
90 setbuf(stdout, NULL);
91 setbuf(stderr, NULL);
92 }
93
94 /*
95 * Parse OS specific command line options.
96 * return 0 if option handled, -1 otherwise
97 */
98 int os_parse_cmd_args(int index, const char *optarg)
99 {
100 return -1;
101 }