chardev/char-win-stdio.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "qapi/error.h"
  27 #include "qemu/main-loop.h"
  28 #include "qemu/module.h"
  29 #include "chardev/char-win.h"
  30 #include "chardev/char-win-stdio.h"
  31
  32 typedef struct {
  33     Chardev parent;
  34     HANDLE  hStdIn;
  35     HANDLE  hInputReadyEvent;
  36     HANDLE  hInputDoneEvent;
  37     HANDLE  hInputThread;
  38     uint8_t win_stdio_buf;
  39 } WinStdioChardev;
  40
  41 #define WIN_STDIO_CHARDEV(obj)                                          \
  42     OBJECT_CHECK(WinStdioChardev, (obj), TYPE_CHARDEV_WIN_STDIO)
  43
  44 static void win_stdio_wait_func(void *opaque)
  45 {
  46     Chardev *chr = CHARDEV(opaque);
  47     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque);
  48     INPUT_RECORD       buf[4];
  49     int                ret;
  50     DWORD              dwSize;
  51     int                i;
  52
  53     ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
  54
  55     if (!ret) {
  56         /* Avoid error storm */
  57         qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
  58         return;
  59     }
  60
  61     for (i = 0; i < dwSize; i++) {
  62         KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
  63
  64         if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
  65             int j;
  66             if (kev->uChar.AsciiChar != 0) {
  67                 for (j = 0; j < kev->wRepeatCount; j++) {
  68                     if (qemu_chr_be_can_write(chr)) {
  69                         uint8_t c = kev->uChar.AsciiChar;
  70                         qemu_chr_be_write(chr, &c, 1);
  71                     }
  72                 }
  73             }
  74         }
  75     }
  76 }
  77
  78 static DWORD WINAPI win_stdio_thread(LPVOID param)
  79 {
  80     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(param);
  81     int                ret;
  82     DWORD              dwSize;
  83
  84     while (1) {
  85
  86         /* Wait for one byte */
  87         ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
  88
  89         /* Exit in case of error, continue if nothing read */
  90         if (!ret) {
  91             break;
  92         }
  93         if (!dwSize) {
  94             continue;
  95         }
  96
  97         /* Some terminal emulator returns \r\n for Enter, just pass \n */
  98         if (stdio->win_stdio_buf == '\r') {
  99             continue;
 100         }
 101
 102         /* Signal the main thread and wait until the byte was eaten */
 103         if (!SetEvent(stdio->hInputReadyEvent)) {
 104             break;
 105         }
 106         if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
 107             != WAIT_OBJECT_0) {
 108             break;
 109         }
 110     }
 111
 112     qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
 113     return 0;
 114 }
 115
 116 static void win_stdio_thread_wait_func(void *opaque)
 117 {
 118     Chardev *chr = CHARDEV(opaque);
 119     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque);
 120
 121     if (qemu_chr_be_can_write(chr)) {
 122         qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
 123     }
 124
 125     SetEvent(stdio->hInputDoneEvent);
 126 }
 127
 128 static void qemu_chr_set_echo_win_stdio(Chardev *chr, bool echo)
 129 {
 130     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
 131     DWORD              dwMode = 0;
 132
 133     GetConsoleMode(stdio->hStdIn, &dwMode);
 134
 135     if (echo) {
 136         SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
 137     } else {
 138         SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
 139     }
 140 }
 141
 142 static void qemu_chr_open_stdio(Chardev *chr,
 143                                 ChardevBackend *backend,
 144                                 bool *be_opened,
 145                                 Error **errp)
 146 {
 147     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
 148     DWORD              dwMode;
 149     int                is_console = 0;
 150
 151     stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
 152     if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
 153         error_setg(errp, "cannot open stdio: invalid handle");
 154         return;
 155     }
 156
 157     is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
 158
 159     if (is_console) {
 160         if (qemu_add_wait_object(stdio->hStdIn,
 161                                  win_stdio_wait_func, chr)) {
 162             error_setg(errp, "qemu_add_wait_object: failed");
 163             goto err1;
 164         }
 165     } else {
 166         DWORD   dwId;
 167
 168         stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
 169         stdio->hInputDoneEvent  = CreateEvent(NULL, FALSE, FALSE, NULL);
 170         if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
 171             || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
 172             error_setg(errp, "cannot create event");
 173             goto err2;
 174         }
 175         if (qemu_add_wait_object(stdio->hInputReadyEvent,
 176                                  win_stdio_thread_wait_func, chr)) {
 177             error_setg(errp, "qemu_add_wait_object: failed");
 178             goto err2;
 179         }
 180         stdio->hInputThread     = CreateThread(NULL, 0, win_stdio_thread,
 181                                                chr, 0, &dwId);
 182
 183         if (stdio->hInputThread == INVALID_HANDLE_VALUE) {
 184             error_setg(errp, "cannot create stdio thread");
 185             goto err3;
 186         }
 187     }
 188
 189     dwMode |= ENABLE_LINE_INPUT;
 190
 191     if (is_console) {
 192         /* set the terminal in raw mode */
 193         /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
 194         dwMode |= ENABLE_PROCESSED_INPUT;
 195     }
 196
 197     SetConsoleMode(stdio->hStdIn, dwMode);
 198
 199     qemu_chr_set_echo_win_stdio(chr, false);
 200
 201     return;
 202
 203 err3:
 204     qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
 205 err2:
 206     CloseHandle(stdio->hInputReadyEvent);
 207     CloseHandle(stdio->hInputDoneEvent);
 208 err1:
 209     qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
 210 }
 211
 212 static void char_win_stdio_finalize(Object *obj)
 213 {
 214     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(obj);
 215
 216     if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
 217         CloseHandle(stdio->hInputReadyEvent);
 218     }
 219     if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
 220         CloseHandle(stdio->hInputDoneEvent);
 221     }
 222     if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
 223         TerminateThread(stdio->hInputThread, 0);
 224     }
 225 }
 226
 227 static int win_stdio_write(Chardev *chr, const uint8_t *buf, int len)
 228 {
 229     HANDLE  hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
 230     DWORD   dwSize;
 231     int     len1;
 232
 233     len1 = len;
 234
 235     while (len1 > 0) {
 236         if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
 237             break;
 238         }
 239         buf  += dwSize;
 240         len1 -= dwSize;
 241     }
 242
 243     return len - len1;
 244 }
 245
 246 static void char_win_stdio_class_init(ObjectClass *oc, void *data)
 247 {
 248     ChardevClass *cc = CHARDEV_CLASS(oc);
 249
 250     cc->open = qemu_chr_open_stdio;
 251     cc->chr_write = win_stdio_write;
 252     cc->chr_set_echo = qemu_chr_set_echo_win_stdio;
 253 }
 254
 255 static const TypeInfo char_win_stdio_type_info = {
 256     .name = TYPE_CHARDEV_WIN_STDIO,
 257     .parent = TYPE_CHARDEV,
 258     .instance_size = sizeof(WinStdioChardev),
 259     .instance_finalize = char_win_stdio_finalize,
 260     .class_init = char_win_stdio_class_init,
 261     .abstract = true,
 262 };
 263
 264 static void register_types(void)
 265 {
 266     type_register_static(&char_win_stdio_type_info);
 267 }
 268
 269 type_init(register_types);