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 34 int 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 53 static 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 65 static TIMECAPS mm_tc; 66 67 static void os_undo_timer_resolution(void) 68 { 69 timeEndPeriod(mm_tc.wPeriodMin); 70 } 71 72 void 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. */ 81 char *os_find_datadir(void) 82 { 83 return qemu_get_exec_dir(); 84 } 85 86 void 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 */ 96 void os_parse_cmd_args(int index, const char *optarg) 97 { 98 return; 99 } 100 101 int 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