Add stdio char device on windows
Simple implementation of an stdio char device on Windows. Signed-off-by: Fabien Chouteau <chouteau@adacore.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Fabien Chouteau
Blue Swirl
parent
070af38404
commit
db418a0a7e
227
qemu-char.c
227
qemu-char.c
@ -538,6 +538,9 @@ int send_all(int fd, const void *_buf, int len1)
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}
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#endif /* !_WIN32 */
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#define STDIO_MAX_CLIENTS 1
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static int stdio_nb_clients;
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#ifndef _WIN32
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typedef struct {
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@ -545,8 +548,6 @@ typedef struct {
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int max_size;
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} FDCharDriver;
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#define STDIO_MAX_CLIENTS 1
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static int stdio_nb_clients = 0;
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static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
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{
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@ -1451,6 +1452,8 @@ static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr)
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#else /* _WIN32 */
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static CharDriverState *stdio_clients[STDIO_MAX_CLIENTS];
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typedef struct {
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int max_size;
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HANDLE hcom, hrecv, hsend;
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@ -1459,6 +1462,14 @@ typedef struct {
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DWORD len;
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} WinCharState;
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typedef struct {
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HANDLE hStdIn;
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HANDLE hInputReadyEvent;
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HANDLE hInputDoneEvent;
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HANDLE hInputThread;
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uint8_t win_stdio_buf;
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} WinStdioCharState;
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#define NSENDBUF 2048
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#define NRECVBUF 2048
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#define MAXCONNECT 1
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@ -1809,6 +1820,217 @@ static int qemu_chr_open_win_file_out(QemuOpts *opts, CharDriverState **_chr)
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return qemu_chr_open_win_file(fd_out, _chr);
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}
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static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
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{
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HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
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DWORD dwSize;
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int len1;
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len1 = len;
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while (len1 > 0) {
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if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
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break;
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}
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buf += dwSize;
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len1 -= dwSize;
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}
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return len - len1;
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}
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static void win_stdio_wait_func(void *opaque)
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{
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CharDriverState *chr = opaque;
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WinStdioCharState *stdio = chr->opaque;
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INPUT_RECORD buf[4];
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int ret;
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DWORD dwSize;
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int i;
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ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
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&dwSize);
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if (!ret) {
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/* Avoid error storm */
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qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
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return;
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}
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for (i = 0; i < dwSize; i++) {
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KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
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if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
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int j;
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if (kev->uChar.AsciiChar != 0) {
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for (j = 0; j < kev->wRepeatCount; j++) {
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if (qemu_chr_be_can_write(chr)) {
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uint8_t c = kev->uChar.AsciiChar;
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qemu_chr_be_write(chr, &c, 1);
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}
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}
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}
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}
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}
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}
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static DWORD WINAPI win_stdio_thread(LPVOID param)
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{
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CharDriverState *chr = param;
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WinStdioCharState *stdio = chr->opaque;
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int ret;
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DWORD dwSize;
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while (1) {
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/* Wait for one byte */
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ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
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/* Exit in case of error, continue if nothing read */
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if (!ret) {
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break;
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}
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if (!dwSize) {
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continue;
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}
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/* Some terminal emulator returns \r\n for Enter, just pass \n */
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if (stdio->win_stdio_buf == '\r') {
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continue;
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}
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/* Signal the main thread and wait until the byte was eaten */
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if (!SetEvent(stdio->hInputReadyEvent)) {
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break;
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}
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if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
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!= WAIT_OBJECT_0) {
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break;
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}
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}
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qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
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return 0;
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}
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static void win_stdio_thread_wait_func(void *opaque)
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{
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CharDriverState *chr = opaque;
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WinStdioCharState *stdio = chr->opaque;
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if (qemu_chr_be_can_write(chr)) {
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qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
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}
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SetEvent(stdio->hInputDoneEvent);
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}
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static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
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{
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WinStdioCharState *stdio = chr->opaque;
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DWORD dwMode = 0;
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GetConsoleMode(stdio->hStdIn, &dwMode);
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if (echo) {
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SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
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} else {
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SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
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}
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}
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static void win_stdio_close(CharDriverState *chr)
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{
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WinStdioCharState *stdio = chr->opaque;
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if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
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CloseHandle(stdio->hInputReadyEvent);
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}
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if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
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CloseHandle(stdio->hInputDoneEvent);
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}
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if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
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TerminateThread(stdio->hInputThread, 0);
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}
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g_free(chr->opaque);
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g_free(chr);
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stdio_nb_clients--;
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}
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static int qemu_chr_open_win_stdio(QemuOpts *opts, CharDriverState **_chr)
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{
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CharDriverState *chr;
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WinStdioCharState *stdio;
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DWORD dwMode;
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int is_console = 0;
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if (stdio_nb_clients >= STDIO_MAX_CLIENTS
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|| ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) {
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return -EIO;
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}
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chr = g_malloc0(sizeof(CharDriverState));
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stdio = g_malloc0(sizeof(WinStdioCharState));
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stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
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if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "cannot open stdio: invalid handle\n");
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exit(1);
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}
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is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
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chr->opaque = stdio;
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chr->chr_write = win_stdio_write;
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chr->chr_close = win_stdio_close;
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if (stdio_nb_clients == 0) {
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if (is_console) {
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if (qemu_add_wait_object(stdio->hStdIn,
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win_stdio_wait_func, chr)) {
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fprintf(stderr, "qemu_add_wait_object: failed\n");
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}
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} else {
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DWORD dwId;
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stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
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stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
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stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
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chr, 0, &dwId);
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if (stdio->hInputThread == INVALID_HANDLE_VALUE
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|| stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
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|| stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "cannot create stdio thread or event\n");
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exit(1);
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}
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if (qemu_add_wait_object(stdio->hInputReadyEvent,
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win_stdio_thread_wait_func, chr)) {
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fprintf(stderr, "qemu_add_wait_object: failed\n");
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}
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}
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}
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dwMode |= ENABLE_LINE_INPUT;
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stdio_clients[stdio_nb_clients++] = chr;
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if (stdio_nb_clients == 1 && is_console) {
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/* set the terminal in raw mode */
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/* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
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dwMode |= ENABLE_PROCESSED_INPUT;
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}
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SetConsoleMode(stdio->hStdIn, dwMode);
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chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
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qemu_chr_fe_set_echo(chr, false);
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*_chr = chr;
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return 0;
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}
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#endif /* !_WIN32 */
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/***********************************************************/
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@ -2519,6 +2741,7 @@ static const struct {
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{ .name = "pipe", .open = qemu_chr_open_win_pipe },
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{ .name = "console", .open = qemu_chr_open_win_con },
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{ .name = "serial", .open = qemu_chr_open_win },
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{ .name = "stdio", .open = qemu_chr_open_win_stdio },
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#else
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{ .name = "file", .open = qemu_chr_open_file_out },
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{ .name = "pipe", .open = qemu_chr_open_pipe },
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