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 #if defined(CONFIG_THREAD)
  37
  38 int clock_gettime(clockid_t clock_id, struct timespec *pTimespec)
  39 {
  40   int result = 0;
  41   if (clock_id == CLOCK_REALTIME && pTimespec != 0) {
  42     DWORD t = GetTickCount();
  43     const unsigned cps = 1000;
  44     struct timespec ts;
  45     ts.tv_sec  = t / cps;
  46     ts.tv_nsec = (t % cps) * (1000000000UL / cps);
  47     *pTimespec = ts;
  48   } else {
  49     errno = EINVAL;
  50     result = -1;
  51   }
  52   return result;
  53 }
  54
  55 int pthread_sigmask(int how, const sigset_t *set, sigset_t *oldset)
  56 {
  57     /* Dummy, do nothing. */
  58     return EINVAL;
  59 }
  60
  61 int sigfillset(sigset_t *set)
  62 {
  63     int result = 0;
  64     if (set) {
  65         *(set) = (sigset_t)(-1);
  66     } else {
  67         errno = EINVAL;
  68         result = -1;
  69     }
  70     return result;
  71 }
  72
  73 #endif /* CONFIG_THREAD */
  74
  75 int setenv(const char *name, const char *value, int overwrite)
  76 {
  77     int result = 0;
  78     if (overwrite || !getenv(name)) {
  79         size_t length = strlen(name) + strlen(value) + 2;
  80         char *string = g_malloc(length);
  81         snprintf(string, length, "%s=%s", name, value);
  82         result = putenv(string);
  83
  84         /* Windows takes a copy and does not continue to use our string.
  85          * Therefore it can be safely freed on this platform.  POSIX code
  86          * typically has to leak the string because according to the spec it
  87          * becomes part of the environment.
  88          */
  89         g_free(string);
  90     }
  91     return result;
  92 }
  93
  94 static BOOL WINAPI qemu_ctrl_handler(DWORD type)
  95 {
  96     qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_SIGNAL);
  97     /* Windows 7 kills application when the function returns.
  98        Sleep here to give QEMU a try for closing.
  99        Sleep period is 10000ms because Windows kills the program
 100        after 10 seconds anyway. */
 101     Sleep(10000);
 102
 103     return TRUE;
 104 }
 105
 106 static TIMECAPS mm_tc;
 107
 108 static void os_undo_timer_resolution(void)
 109 {
 110     timeEndPeriod(mm_tc.wPeriodMin);
 111 }
 112
 113 void os_setup_early_signal_handling(void)
 114 {
 115     SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
 116     timeGetDevCaps(&mm_tc, sizeof(mm_tc));
 117     timeBeginPeriod(mm_tc.wPeriodMin);
 118     atexit(os_undo_timer_resolution);
 119 }
 120
 121 /* Look for support files in the same directory as the executable.  */
 122 char *os_find_datadir(void)
 123 {
 124     return qemu_get_exec_dir();
 125 }
 126
 127 void os_set_line_buffering(void)
 128 {
 129     setbuf(stdout, NULL);
 130     setbuf(stderr, NULL);
 131 }
 132
 133 /*
 134  * Parse OS specific command line options.
 135  * return 0 if option handled, -1 otherwise
 136  */
 137 int os_parse_cmd_args(int index, const char *optarg)
 138 {
 139     return -1;
 140 }