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 "sysemu/runstate.h"
  30
  31 static BOOL WINAPI qemu_ctrl_handler(DWORD type)
  32 {
  33     qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_SIGNAL);
  34     /* Windows 7 kills application when the function returns.
  35        Sleep here to give QEMU a try for closing.
  36        Sleep period is 10000ms because Windows kills the program
  37        after 10 seconds anyway. */
  38     Sleep(10000);
  39
  40     return TRUE;
  41 }
  42
  43 static TIMECAPS mm_tc;
  44
  45 static void os_undo_timer_resolution(void)
  46 {
  47     timeEndPeriod(mm_tc.wPeriodMin);
  48 }
  49
  50 void os_setup_early_signal_handling(void)
  51 {
  52     SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
  53     timeGetDevCaps(&mm_tc, sizeof(mm_tc));
  54     timeBeginPeriod(mm_tc.wPeriodMin);
  55     atexit(os_undo_timer_resolution);
  56 }
  57
  58 void os_set_line_buffering(void)
  59 {
  60     setbuf(stdout, NULL);
  61     setbuf(stderr, NULL);
  62 }