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19113504
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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 */
d38ea87a 25#include "qemu/osdep.h"
19113504 26#include <windows.h>
0727b867 27#include <mmsystem.h>
9c17d615 28#include "sysemu/sysemu.h"
59a5264b 29#include "qemu-options.h"
19113504 30
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31/***********************************************************/
32/* Functions missing in mingw */
33
34int setenv(const char *name, const char *value, int overwrite)
35{
36 int result = 0;
37 if (overwrite || !getenv(name)) {
38 size_t length = strlen(name) + strlen(value) + 2;
7267c094 39 char *string = g_malloc(length);
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40 snprintf(string, length, "%s=%s", name, value);
41 result = putenv(string);
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42
43 /* Windows takes a copy and does not continue to use our string.
44 * Therefore it can be safely freed on this platform. POSIX code
45 * typically has to leak the string because according to the spec it
46 * becomes part of the environment.
47 */
48 g_free(string);
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49 }
50 return result;
51}
52
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53static BOOL WINAPI qemu_ctrl_handler(DWORD type)
54{
cf83f140 55 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_SIGNAL);
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56 /* Windows 7 kills application when the function returns.
57 Sleep here to give QEMU a try for closing.
58 Sleep period is 10000ms because Windows kills the program
59 after 10 seconds anyway. */
60 Sleep(10000);
61
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62 return TRUE;
63}
64
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65static TIMECAPS mm_tc;
66
67static void os_undo_timer_resolution(void)
68{
69 timeEndPeriod(mm_tc.wPeriodMin);
70}
71
fe98ac14 72void os_setup_early_signal_handling(void)
69bd73b1 73{
69bd73b1 74 SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
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75 timeGetDevCaps(&mm_tc, sizeof(mm_tc));
76 timeBeginPeriod(mm_tc.wPeriodMin);
77 atexit(os_undo_timer_resolution);
69bd73b1 78}
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79
80/* Look for support files in the same directory as the executable. */
10f5bff6 81char *os_find_datadir(void)
6170540b 82{
10f5bff6 83 return qemu_get_exec_dir();
6170540b 84}
59a5264b 85
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86void os_set_line_buffering(void)
87{
88 setbuf(stdout, NULL);
89 setbuf(stderr, NULL);
90}
91
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92/*
93 * Parse OS specific command line options.
94 * return 0 if option handled, -1 otherwise
95 */
96void os_parse_cmd_args(int index, const char *optarg)
97{
98 return;
99}
eb505be1 100
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101int qemu_create_pidfile(const char *filename)
102{
103 char buffer[128];
104 int len;
105 HANDLE file;
106 OVERLAPPED overlap;
107 BOOL ret;
108 memset(&overlap, 0, sizeof(overlap));
109
110 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
bfc763fc 111 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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112
113 if (file == INVALID_HANDLE_VALUE) {
114 return -1;
115 }
59ad3403 116 len = snprintf(buffer, sizeof(buffer), "%d\n", getpid());
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117 ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
118 NULL, &overlap);
119 CloseHandle(file);
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120 if (ret == 0) {
121 return -1;
122 }
123 return 0;
124}