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 #include "qom/object.h"
  32
  33 struct WinStdioChardev {
  34     Chardev parent;
  35     HANDLE  hStdIn;
  36     HANDLE  hInputReadyEvent;
  37     HANDLE  hInputDoneEvent;
  38     HANDLE  hInputThread;
  39     uint8_t win_stdio_buf;
  40 };
  41 typedef struct WinStdioChardev WinStdioChardev;
  42
  43 DECLARE_INSTANCE_CHECKER(WinStdioChardev, WIN_STDIO_CHARDEV,
  44                          TYPE_CHARDEV_WIN_STDIO)
  45
  46 static void win_stdio_wait_func(void *opaque)
  47 {
  48     Chardev *chr = CHARDEV(opaque);
  49     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque);
  50     INPUT_RECORD       buf[4];
  51     int                ret;
  52     DWORD              dwSize;
  53     int                i;
  54
  55     ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
  56
  57     if (!ret) {
  58         /* Avoid error storm */
  59         qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
  60         return;
  61     }
  62
  63     for (i = 0; i < dwSize; i++) {
  64         KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
  65
  66         if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
  67             int j;
  68             if (kev->uChar.AsciiChar != 0) {
  69                 for (j = 0; j < kev->wRepeatCount; j++) {
  70                     if (qemu_chr_be_can_write(chr)) {
  71                         uint8_t c = kev->uChar.AsciiChar;
  72                         qemu_chr_be_write(chr, &c, 1);
  73                     }
  74                 }
  75             }
  76         }
  77     }
  78 }
  79
  80 static DWORD WINAPI win_stdio_thread(LPVOID param)
  81 {
  82     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(param);
  83     int                ret;
  84     DWORD              dwSize;
  85
  86     while (1) {
  87
  88         /* Wait for one byte */
  89         ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
  90
  91         /* Exit in case of error, continue if nothing read */
  92         if (!ret) {
  93             break;
  94         }
  95         if (!dwSize) {
  96             continue;
  97         }
  98
  99         /* Some terminal emulator returns \r\n for Enter, just pass \n */
 100         if (stdio->win_stdio_buf == '\r') {
 101             continue;
 102         }
 103
 104         /* Signal the main thread and wait until the byte was eaten */
 105         if (!SetEvent(stdio->hInputReadyEvent)) {
 106             break;
 107         }
 108         if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
 109             != WAIT_OBJECT_0) {
 110             break;
 111         }
 112     }
 113
 114     qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
 115     return 0;
 116 }
 117
 118 static void win_stdio_thread_wait_func(void *opaque)
 119 {
 120     Chardev *chr = CHARDEV(opaque);
 121     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque);
 122
 123     if (qemu_chr_be_can_write(chr)) {
 124         qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
 125     }
 126
 127     SetEvent(stdio->hInputDoneEvent);
 128 }
 129
 130 static void qemu_chr_set_echo_win_stdio(Chardev *chr, bool echo)
 131 {
 132     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
 133     DWORD              dwMode = 0;
 134
 135     GetConsoleMode(stdio->hStdIn, &dwMode);
 136
 137     if (echo) {
 138         SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
 139     } else {
 140         SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
 141     }
 142 }
 143
 144 static void qemu_chr_open_stdio(Chardev *chr,
 145                                 ChardevBackend *backend,
 146                                 bool *be_opened,
 147                                 Error **errp)
 148 {
 149     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
 150     DWORD              dwMode;
 151     int                is_console = 0;
 152
 153     stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
 154     if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
 155         error_setg(errp, "cannot open stdio: invalid handle");
 156         return;
 157     }
 158
 159     is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
 160
 161     if (is_console) {
 162         if (qemu_add_wait_object(stdio->hStdIn,
 163                                  win_stdio_wait_func, chr)) {
 164             error_setg(errp, "qemu_add_wait_object: failed");
 165             goto err1;
 166         }
 167     } else {
 168         DWORD   dwId;
 169
 170         stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
 171         stdio->hInputDoneEvent  = CreateEvent(NULL, FALSE, FALSE, NULL);
 172         if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
 173             || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
 174             error_setg(errp, "cannot create event");
 175             goto err2;
 176         }
 177         if (qemu_add_wait_object(stdio->hInputReadyEvent,
 178                                  win_stdio_thread_wait_func, chr)) {
 179             error_setg(errp, "qemu_add_wait_object: failed");
 180             goto err2;
 181         }
 182         stdio->hInputThread     = CreateThread(NULL, 0, win_stdio_thread,
 183                                                chr, 0, &dwId);
 184
 185         if (stdio->hInputThread == INVALID_HANDLE_VALUE) {
 186             error_setg(errp, "cannot create stdio thread");
 187             goto err3;
 188         }
 189     }
 190
 191     dwMode |= ENABLE_LINE_INPUT;
 192
 193     if (is_console) {
 194         /* set the terminal in raw mode */
 195         /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
 196         dwMode |= ENABLE_PROCESSED_INPUT;
 197     }
 198
 199     SetConsoleMode(stdio->hStdIn, dwMode);
 200
 201     qemu_chr_set_echo_win_stdio(chr, false);
 202
 203     return;
 204
 205 err3:
 206     qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
 207 err2:
 208     CloseHandle(stdio->hInputReadyEvent);
 209     CloseHandle(stdio->hInputDoneEvent);
 210 err1:
 211     qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
 212 }
 213
 214 static void char_win_stdio_finalize(Object *obj)
 215 {
 216     WinStdioChardev *stdio = WIN_STDIO_CHARDEV(obj);
 217
 218     if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
 219         CloseHandle(stdio->hInputReadyEvent);
 220     }
 221     if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
 222         CloseHandle(stdio->hInputDoneEvent);
 223     }
 224     if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
 225         TerminateThread(stdio->hInputThread, 0);
 226     }
 227 }
 228
 229 static int win_stdio_write(Chardev *chr, const uint8_t *buf, int len)
 230 {
 231     HANDLE  hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
 232     DWORD   dwSize;
 233     int     len1;
 234
 235     len1 = len;
 236
 237     while (len1 > 0) {
 238         if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
 239             break;
 240         }
 241         buf  += dwSize;
 242         len1 -= dwSize;
 243     }
 244
 245     return len - len1;
 246 }
 247
 248 static void char_win_stdio_class_init(ObjectClass *oc, void *data)
 249 {
 250     ChardevClass *cc = CHARDEV_CLASS(oc);
 251
 252     cc->open = qemu_chr_open_stdio;
 253     cc->chr_write = win_stdio_write;
 254     cc->chr_set_echo = qemu_chr_set_echo_win_stdio;
 255 }
 256
 257 static const TypeInfo char_win_stdio_type_info = {
 258     .name = TYPE_CHARDEV_WIN_STDIO,
 259     .parent = TYPE_CHARDEV,
 260     .instance_size = sizeof(WinStdioChardev),
 261     .instance_finalize = char_win_stdio_finalize,
 262     .class_init = char_win_stdio_class_init,
 263     .abstract = true,
 264 };
 265
 266 static void register_types(void)
 267 {
 268     type_register_static(&char_win_stdio_type_info);
 269 }
 270
 271 type_init(register_types);