xref: /openbmc/qemu/os-win32.c (revision 54d31236b906c8f03eb011717de7bc47000720c3)
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  }
102