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 }