LXR qemu/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#include "qemu/osdep.h"
  26#include <windows.h>
  27#include <mmsystem.h>
  28#include "sysemu/sysemu.h"
  29#include "qemu-options.h"
  30
  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;
  39        char *string = g_malloc(length);
  40        snprintf(string, length, "%s=%s", name, value);
  41        result = putenv(string);
  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);
  49    }
  50    return result;
  51}
  52
  53static BOOL WINAPI qemu_ctrl_handler(DWORD type)
  54{
  55    qemu_system_shutdown_request();
  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
  62    return TRUE;
  63}
  64
  65static TIMECAPS mm_tc;
  66
  67static void os_undo_timer_resolution(void)
  68{
  69    timeEndPeriod(mm_tc.wPeriodMin);
  70}
  71
  72void os_setup_early_signal_handling(void)
  73{
  74    SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
  75    timeGetDevCaps(&mm_tc, sizeof(mm_tc));
  76    timeBeginPeriod(mm_tc.wPeriodMin);
  77    atexit(os_undo_timer_resolution);
  78}
  79
  80/* Look for support files in the same directory as the executable.  */
  81char *os_find_datadir(void)
  82{
  83    return qemu_get_exec_dir();
  84}
  85
  86void os_set_line_buffering(void)
  87{
  88    setbuf(stdout, NULL);
  89    setbuf(stderr, NULL);
  90}
  91
  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}
 100
 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,
 111                      OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 112
 113    if (file == INVALID_HANDLE_VALUE) {
 114        return -1;
 115    }
 116    len = snprintf(buffer, sizeof(buffer), "%d\n", getpid());
 117    ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
 118                    NULL, &overlap);
 119    CloseHandle(file);
 120    if (ret == 0) {
 121        return -1;
 122    }
 123    return 0;
 124}
 125