2 * Server-side serial port communications management
4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2000,2001 Mike McCormack
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include "wine/port.h"
33 #include <sys/types.h>
42 #ifdef HAVE_SYS_IOCTL_H
43 #include <sys/ioctl.h>
60 static void serial_dump( struct object *obj, int verbose );
61 static struct fd *serial_get_fd( struct object *obj );
62 static void serial_destroy(struct object *obj);
64 static int serial_get_poll_events( struct fd *fd );
65 static void serial_poll_event( struct fd *fd, int event );
66 static int serial_get_info( struct fd *fd );
67 static int serial_flush( struct fd *fd, struct event **event );
68 static void serial_queue_async( struct fd *fd, void *apc, void *user, void *iosb, int type, int count );
69 static void serial_cancel_async( struct fd *fd );
78 unsigned int readinterval;
79 unsigned int readconst;
80 unsigned int readmult;
81 unsigned int writeconst;
82 unsigned int writemult;
84 unsigned int eventmask;
85 unsigned int commerror;
87 struct termios original;
93 /* FIXME: add dcb, comm status, handler module, sharing */
96 static const struct object_ops serial_ops =
98 sizeof(struct serial), /* size */
99 serial_dump, /* dump */
100 default_fd_add_queue, /* add_queue */
101 default_fd_remove_queue, /* remove_queue */
102 default_fd_signaled, /* signaled */
103 no_satisfied, /* satisfied */
104 serial_get_fd, /* get_fd */
105 serial_destroy /* destroy */
108 static const struct fd_ops serial_fd_ops =
110 serial_get_poll_events, /* get_poll_events */
111 serial_poll_event, /* poll_event */
112 serial_flush, /* flush */
113 serial_get_info, /* get_file_info */
114 serial_queue_async, /* queue_async */
115 serial_cancel_async /* cancel_async */
118 /* check if the given fd is a serial port */
119 int is_serial_fd( struct fd *fd )
123 return !tcgetattr( get_unix_fd(fd), &tios );
126 /* create a serial object for a given fd */
127 struct object *create_serial( struct fd *fd, unsigned int options )
129 struct serial *serial;
132 if ((unix_fd = dup( get_unix_fd(fd) )) == -1) return NULL;
134 /* set the fd back to blocking if necessary */
135 if (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT))
136 fcntl( unix_fd, F_SETFL, 0 );
138 if (!(serial = alloc_object( &serial_ops )))
143 serial->options = options;
144 serial->readinterval = 0;
145 serial->readmult = 0;
146 serial->readconst = 0;
147 serial->writemult = 0;
148 serial->writeconst = 0;
149 serial->eventmask = 0;
150 serial->commerror = 0;
151 list_init( &serial->read_q );
152 list_init( &serial->write_q );
153 list_init( &serial->wait_q );
154 if (!(serial->fd = create_anonymous_fd( &serial_fd_ops, unix_fd, &serial->obj )))
156 release_object( serial );
162 static struct fd *serial_get_fd( struct object *obj )
164 struct serial *serial = (struct serial *)obj;
165 return (struct fd *)grab_object( serial->fd );
168 static void serial_destroy( struct object *obj)
170 struct serial *serial = (struct serial *)obj;
172 async_terminate_queue( &serial->read_q, STATUS_CANCELLED );
173 async_terminate_queue( &serial->write_q, STATUS_CANCELLED );
174 async_terminate_queue( &serial->wait_q, STATUS_CANCELLED );
175 if (serial->fd) release_object( serial->fd );
178 static void serial_dump( struct object *obj, int verbose )
180 struct serial *serial = (struct serial *)obj;
181 assert( obj->ops == &serial_ops );
182 fprintf( stderr, "Port fd=%p mask=%x\n", serial->fd, serial->eventmask );
185 static struct serial *get_serial_obj( struct process *process, obj_handle_t handle, unsigned int access )
187 return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
190 static int serial_get_poll_events( struct fd *fd )
192 struct serial *serial = get_fd_user( fd );
194 assert( serial->obj.ops == &serial_ops );
196 if (!list_empty( &serial->read_q )) events |= POLLIN;
197 if (!list_empty( &serial->write_q )) events |= POLLOUT;
198 if (!list_empty( &serial->wait_q )) events |= POLLIN;
200 /* fprintf(stderr,"poll events are %04x\n",events); */
205 static int serial_get_info( struct fd *fd )
208 struct serial *serial = get_fd_user( fd );
209 assert( serial->obj.ops == &serial_ops );
211 if (!(serial->options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)))
212 flags |= FD_FLAG_OVERLAPPED;
213 else if (!(serial->readinterval == MAXDWORD &&
214 serial->readmult == 0 && serial->readconst == 0))
215 flags |= FD_FLAG_TIMEOUT;
216 if (serial->readinterval == MAXDWORD &&
217 serial->readmult == 0 && serial->readconst == 0)
218 flags |= FD_FLAG_AVAILABLE;
223 static void serial_poll_event(struct fd *fd, int event)
225 struct serial *serial = get_fd_user( fd );
227 /* fprintf(stderr,"Poll event %02x\n",event); */
229 if (!list_empty( &serial->read_q ) && (POLLIN & event) )
230 async_terminate_head( &serial->read_q, STATUS_ALERTED );
232 if (!list_empty( &serial->write_q ) && (POLLOUT & event) )
233 async_terminate_head( &serial->write_q, STATUS_ALERTED );
235 if (!list_empty( &serial->wait_q ) && (POLLIN & event) )
236 async_terminate_head( &serial->wait_q, STATUS_ALERTED );
238 set_fd_events( fd, serial_get_poll_events(fd) );
241 static void serial_queue_async( struct fd *fd, void *apc, void *user, void *iosb,
242 int type, int count )
244 struct serial *serial = get_fd_user( fd );
249 assert(serial->obj.ops == &serial_ops);
253 case ASYNC_TYPE_READ:
254 queue = &serial->read_q;
255 timeout = serial->readconst + serial->readmult*count;
257 case ASYNC_TYPE_WAIT:
258 queue = &serial->wait_q;
261 case ASYNC_TYPE_WRITE:
262 queue = &serial->write_q;
263 timeout = serial->writeconst + serial->writemult*count;
266 set_error(STATUS_INVALID_PARAMETER);
270 if (!create_async( fd, current, timeout, queue, apc, user, iosb ))
273 /* Check if the new pending request can be served immediately */
274 events = check_fd_events( fd, serial_get_poll_events( fd ) );
277 /* serial_poll_event() calls set_select_events() */
278 serial_poll_event( fd, events );
282 set_fd_events( fd, serial_get_poll_events( fd ) );
285 static void serial_cancel_async( struct fd *fd )
287 struct serial *serial = get_fd_user( fd );
288 assert(serial->obj.ops == &serial_ops);
290 async_terminate_queue( &serial->read_q, STATUS_CANCELLED );
291 async_terminate_queue( &serial->write_q, STATUS_CANCELLED );
292 async_terminate_queue( &serial->wait_q, STATUS_CANCELLED );
295 static int serial_flush( struct fd *fd, struct event **event )
297 /* MSDN says: If hFile is a handle to a communications device,
298 * the function only flushes the transmit buffer.
300 int ret = (tcflush( get_unix_fd(fd), TCOFLUSH ) != -1);
301 if (!ret) file_set_error();
305 DECL_HANDLER(get_serial_info)
307 struct serial *serial;
309 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
312 reply->readinterval = serial->readinterval;
313 reply->readconst = serial->readconst;
314 reply->readmult = serial->readmult;
315 reply->writeconst = serial->writeconst;
316 reply->writemult = serial->writemult;
319 reply->eventmask = serial->eventmask;
321 /* comm port error status */
322 reply->commerror = serial->commerror;
324 release_object( serial );
328 DECL_HANDLER(set_serial_info)
330 struct serial *serial;
332 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
335 if (req->flags & SERIALINFO_SET_TIMEOUTS)
337 serial->readinterval = req->readinterval;
338 serial->readconst = req->readconst;
339 serial->readmult = req->readmult;
340 serial->writeconst = req->writeconst;
341 serial->writemult = req->writemult;
345 if (req->flags & SERIALINFO_SET_MASK)
347 serial->eventmask = req->eventmask;
348 if (!serial->eventmask)
350 async_terminate_queue( &serial->wait_q, STATUS_SUCCESS );
354 /* comm port error status */
355 if (req->flags & SERIALINFO_SET_ERROR)
357 serial->commerror = req->commerror;
360 release_object( serial );