diff options
Diffstat (limited to 'chardev/char-win-stdio.c')
| -rw-r--r-- | chardev/char-win-stdio.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/chardev/char-win-stdio.c b/chardev/char-win-stdio.c new file mode 100644 index 0000000..eb44afc --- /dev/null +++ b/chardev/char-win-stdio.c @@ -0,0 +1,266 @@ +/* + * QEMU System Emulator + * + * Copyright (c) 2003-2008 Fabrice Bellard + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "char-win.h" +#include "char-win-stdio.h" + +typedef struct { + Chardev parent; + HANDLE hStdIn; + HANDLE hInputReadyEvent; + HANDLE hInputDoneEvent; + HANDLE hInputThread; + uint8_t win_stdio_buf; +} WinStdioChardev; + +#define WIN_STDIO_CHARDEV(obj) \ + OBJECT_CHECK(WinStdioChardev, (obj), TYPE_CHARDEV_WIN_STDIO) + +static void win_stdio_wait_func(void *opaque) +{ + Chardev *chr = CHARDEV(opaque); + WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque); + INPUT_RECORD buf[4]; + int ret; + DWORD dwSize; + int i; + + ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize); + + if (!ret) { + /* Avoid error storm */ + qemu_del_wait_object(stdio->hStdIn, NULL, NULL); + return; + } + + for (i = 0; i < dwSize; i++) { + KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent; + + if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) { + int j; + if (kev->uChar.AsciiChar != 0) { + for (j = 0; j < kev->wRepeatCount; j++) { + if (qemu_chr_be_can_write(chr)) { + uint8_t c = kev->uChar.AsciiChar; + qemu_chr_be_write(chr, &c, 1); + } + } + } + } + } +} + +static DWORD WINAPI win_stdio_thread(LPVOID param) +{ + WinStdioChardev *stdio = WIN_STDIO_CHARDEV(param); + int ret; + DWORD dwSize; + + while (1) { + + /* Wait for one byte */ + ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL); + + /* Exit in case of error, continue if nothing read */ + if (!ret) { + break; + } + if (!dwSize) { + continue; + } + + /* Some terminal emulator returns \r\n for Enter, just pass \n */ + if (stdio->win_stdio_buf == '\r') { + continue; + } + + /* Signal the main thread and wait until the byte was eaten */ + if (!SetEvent(stdio->hInputReadyEvent)) { + break; + } + if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE) + != WAIT_OBJECT_0) { + break; + } + } + + qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL); + return 0; +} + +static void win_stdio_thread_wait_func(void *opaque) +{ + Chardev *chr = CHARDEV(opaque); + WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque); + + if (qemu_chr_be_can_write(chr)) { + qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1); + } + + SetEvent(stdio->hInputDoneEvent); +} + +static void qemu_chr_set_echo_win_stdio(Chardev *chr, bool echo) +{ + WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr); + DWORD dwMode = 0; + + GetConsoleMode(stdio->hStdIn, &dwMode); + + if (echo) { + SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT); + } else { + SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT); + } +} + +static void qemu_chr_open_stdio(Chardev *chr, + ChardevBackend *backend, + bool *be_opened, + Error **errp) +{ + WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr); + DWORD dwMode; + int is_console = 0; + + stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE); + if (stdio->hStdIn == INVALID_HANDLE_VALUE) { + error_setg(errp, "cannot open stdio: invalid handle"); + return; + } + + is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0; + + if (is_console) { + if (qemu_add_wait_object(stdio->hStdIn, + win_stdio_wait_func, chr)) { + error_setg(errp, "qemu_add_wait_object: failed"); + goto err1; + } + } else { + DWORD dwId; + + stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE + || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) { + error_setg(errp, "cannot create event"); + goto err2; + } + if (qemu_add_wait_object(stdio->hInputReadyEvent, + win_stdio_thread_wait_func, chr)) { + error_setg(errp, "qemu_add_wait_object: failed"); + goto err2; + } + stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread, + chr, 0, &dwId); + + if (stdio->hInputThread == INVALID_HANDLE_VALUE) { + error_setg(errp, "cannot create stdio thread"); + goto err3; + } + } + + dwMode |= ENABLE_LINE_INPUT; + + if (is_console) { + /* set the terminal in raw mode */ + /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */ + dwMode |= ENABLE_PROCESSED_INPUT; + } + + SetConsoleMode(stdio->hStdIn, dwMode); + + qemu_chr_set_echo_win_stdio(chr, false); + + return; + +err3: + qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL); +err2: + CloseHandle(stdio->hInputReadyEvent); + CloseHandle(stdio->hInputDoneEvent); +err1: + qemu_del_wait_object(stdio->hStdIn, NULL, NULL); +} + +static void char_win_stdio_finalize(Object *obj) +{ + WinStdioChardev *stdio = WIN_STDIO_CHARDEV(obj); + + if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) { + CloseHandle(stdio->hInputReadyEvent); + } + if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) { + CloseHandle(stdio->hInputDoneEvent); + } + if (stdio->hInputThread != INVALID_HANDLE_VALUE) { + TerminateThread(stdio->hInputThread, 0); + } +} + +static int win_stdio_write(Chardev *chr, const uint8_t *buf, int len) +{ + HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE); + DWORD dwSize; + int len1; + + len1 = len; + + while (len1 > 0) { + if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) { + break; + } + buf += dwSize; + len1 -= dwSize; + } + + return len - len1; +} + +static void char_win_stdio_class_init(ObjectClass *oc, void *data) +{ + ChardevClass *cc = CHARDEV_CLASS(oc); + + cc->open = qemu_chr_open_stdio; + cc->chr_write = win_stdio_write; + cc->chr_set_echo = qemu_chr_set_echo_win_stdio; +} + +static const TypeInfo char_win_stdio_type_info = { + .name = TYPE_CHARDEV_WIN_STDIO, + .parent = TYPE_CHARDEV, + .instance_size = sizeof(WinStdioChardev), + .instance_finalize = char_win_stdio_finalize, + .class_init = char_win_stdio_class_init, + .abstract = true, +}; + +static void register_types(void) +{ + type_register_static(&char_win_stdio_type_info); +} + +type_init(register_types); |