diff options
Diffstat (limited to 'chardev/char-win.c')
| -rw-r--r-- | chardev/char-win.c | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/chardev/char-win.c b/chardev/char-win.c new file mode 100644 index 0000000000..e4b6957ded --- /dev/null +++ b/chardev/char-win.c @@ -0,0 +1,265 @@ +/* + * 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 "qemu-common.h" +#include "qapi/error.h" +#include "char-win.h" + +static void win_chr_readfile(Chardev *chr) +{ + WinChardev *s = WIN_CHARDEV(chr); + + int ret, err; + uint8_t buf[CHR_READ_BUF_LEN]; + DWORD size; + + ZeroMemory(&s->orecv, sizeof(s->orecv)); + s->orecv.hEvent = s->hrecv; + ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv); + if (!ret) { + err = GetLastError(); + if (err == ERROR_IO_PENDING) { + ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE); + } + } + + if (size > 0) { + qemu_chr_be_write(chr, buf, size); + } +} + +static void win_chr_read(Chardev *chr) +{ + WinChardev *s = WIN_CHARDEV(chr); + + if (s->len > s->max_size) { + s->len = s->max_size; + } + if (s->len == 0) { + return; + } + + win_chr_readfile(chr); +} + +static int win_chr_read_poll(Chardev *chr) +{ + WinChardev *s = WIN_CHARDEV(chr); + + s->max_size = qemu_chr_be_can_write(chr); + return s->max_size; +} + +static int win_chr_poll(void *opaque) +{ + Chardev *chr = CHARDEV(opaque); + WinChardev *s = WIN_CHARDEV(opaque); + COMSTAT status; + DWORD comerr; + + ClearCommError(s->hcom, &comerr, &status); + if (status.cbInQue > 0) { + s->len = status.cbInQue; + win_chr_read_poll(chr); + win_chr_read(chr); + return 1; + } + return 0; +} + +int win_chr_init(Chardev *chr, const char *filename, Error **errp) +{ + WinChardev *s = WIN_CHARDEV(chr); + COMMCONFIG comcfg; + COMMTIMEOUTS cto = { 0, 0, 0, 0, 0}; + COMSTAT comstat; + DWORD size; + DWORD err; + + s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hsend) { + error_setg(errp, "Failed CreateEvent"); + goto fail; + } + s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); + if (!s->hrecv) { + error_setg(errp, "Failed CreateEvent"); + goto fail; + } + + s->hcom = CreateFile(filename, GENERIC_READ | GENERIC_WRITE, 0, NULL, + OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); + if (s->hcom == INVALID_HANDLE_VALUE) { + error_setg(errp, "Failed CreateFile (%lu)", GetLastError()); + s->hcom = NULL; + goto fail; + } + + if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) { + error_setg(errp, "Failed SetupComm"); + goto fail; + } + + ZeroMemory(&comcfg, sizeof(COMMCONFIG)); + size = sizeof(COMMCONFIG); + GetDefaultCommConfig(filename, &comcfg, &size); + comcfg.dcb.DCBlength = sizeof(DCB); + CommConfigDialog(filename, NULL, &comcfg); + + if (!SetCommState(s->hcom, &comcfg.dcb)) { + error_setg(errp, "Failed SetCommState"); + goto fail; + } + + if (!SetCommMask(s->hcom, EV_ERR)) { + error_setg(errp, "Failed SetCommMask"); + goto fail; + } + + cto.ReadIntervalTimeout = MAXDWORD; + if (!SetCommTimeouts(s->hcom, &cto)) { + error_setg(errp, "Failed SetCommTimeouts"); + goto fail; + } + + if (!ClearCommError(s->hcom, &err, &comstat)) { + error_setg(errp, "Failed ClearCommError"); + goto fail; + } + qemu_add_polling_cb(win_chr_poll, chr); + return 0; + + fail: + return -1; +} + +int win_chr_pipe_poll(void *opaque) +{ + Chardev *chr = CHARDEV(opaque); + WinChardev *s = WIN_CHARDEV(opaque); + DWORD size; + + PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL); + if (size > 0) { + s->len = size; + win_chr_read_poll(chr); + win_chr_read(chr); + return 1; + } + return 0; +} + +/* Called with chr_write_lock held. */ +static int win_chr_write(Chardev *chr, const uint8_t *buf, int len1) +{ + WinChardev *s = WIN_CHARDEV(chr); + DWORD len, ret, size, err; + + len = len1; + ZeroMemory(&s->osend, sizeof(s->osend)); + s->osend.hEvent = s->hsend; + while (len > 0) { + if (s->hsend) { + ret = WriteFile(s->hcom, buf, len, &size, &s->osend); + } else { + ret = WriteFile(s->hcom, buf, len, &size, NULL); + } + if (!ret) { + err = GetLastError(); + if (err == ERROR_IO_PENDING) { + ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE); + if (ret) { + buf += size; + len -= size; + } else { + break; + } + } else { + break; + } + } else { + buf += size; + len -= size; + } + } + return len1 - len; +} + +static void char_win_finalize(Object *obj) +{ + Chardev *chr = CHARDEV(obj); + WinChardev *s = WIN_CHARDEV(chr); + + if (s->skip_free) { + return; + } + + if (s->hsend) { + CloseHandle(s->hsend); + } + if (s->hrecv) { + CloseHandle(s->hrecv); + } + if (s->hcom) { + CloseHandle(s->hcom); + } + if (s->fpipe) { + qemu_del_polling_cb(win_chr_pipe_poll, chr); + } else { + qemu_del_polling_cb(win_chr_poll, chr); + } + + qemu_chr_be_event(chr, CHR_EVENT_CLOSED); +} + +void qemu_chr_open_win_file(Chardev *chr, HANDLE fd_out) +{ + WinChardev *s = WIN_CHARDEV(chr); + + s->skip_free = true; + s->hcom = fd_out; +} + +static void char_win_class_init(ObjectClass *oc, void *data) +{ + ChardevClass *cc = CHARDEV_CLASS(oc); + + cc->chr_write = win_chr_write; +} + +static const TypeInfo char_win_type_info = { + .name = TYPE_CHARDEV_WIN, + .parent = TYPE_CHARDEV, + .instance_size = sizeof(WinChardev), + .instance_finalize = char_win_finalize, + .class_init = char_win_class_init, + .abstract = true, +}; + +static void register_types(void) +{ + type_register_static(&char_win_type_info); +} + +type_init(register_types); |