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>
58 static void serial_dump( struct object *obj, int verbose );
59 static struct fd *serial_get_fd( struct object *obj );
60 static void serial_destroy(struct object *obj);
62 static int serial_get_poll_events( struct fd *fd );
63 static void serial_poll_event( struct fd *fd, int event );
64 static int serial_get_info( struct fd *fd );
65 static int serial_flush( struct fd *fd, struct event **event );
66 static void serial_queue_async(struct fd *fd, void *ptr, unsigned int status, int type, int count);
75 unsigned int readinterval;
76 unsigned int readconst;
77 unsigned int readmult;
78 unsigned int writeconst;
79 unsigned int writemult;
81 unsigned int eventmask;
82 unsigned int commerror;
84 struct termios original;
86 struct async_queue read_q;
87 struct async_queue write_q;
88 struct async_queue wait_q;
90 /* FIXME: add dcb, comm status, handler module, sharing */
93 static const struct object_ops serial_ops =
95 sizeof(struct serial), /* size */
96 serial_dump, /* dump */
97 default_fd_add_queue, /* add_queue */
98 default_fd_remove_queue, /* remove_queue */
99 default_fd_signaled, /* signaled */
100 no_satisfied, /* satisfied */
101 serial_get_fd, /* get_fd */
102 serial_destroy /* destroy */
105 static const struct fd_ops serial_fd_ops =
107 serial_get_poll_events, /* get_poll_events */
108 serial_poll_event, /* poll_event */
109 serial_flush, /* flush */
110 serial_get_info, /* get_file_info */
111 serial_queue_async /* queue_async */
114 /* check if the given fd is a serial port */
115 int is_serial_fd( struct fd *fd )
119 return !tcgetattr( get_unix_fd(fd), &tios );
122 /* create a serial object for a given fd */
123 struct object *create_serial( struct fd *fd, unsigned int options )
125 struct serial *serial;
128 if ((unix_fd = dup( get_unix_fd(fd) )) == -1) return NULL;
130 /* set the fd back to blocking if necessary */
131 if (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT))
132 fcntl( unix_fd, F_SETFL, 0 );
134 if (!(serial = alloc_object( &serial_ops )))
139 serial->options = options;
140 serial->readinterval = 0;
141 serial->readmult = 0;
142 serial->readconst = 0;
143 serial->writemult = 0;
144 serial->writeconst = 0;
145 serial->eventmask = 0;
146 serial->commerror = 0;
147 init_async_queue(&serial->read_q);
148 init_async_queue(&serial->write_q);
149 init_async_queue(&serial->wait_q);
150 if (!(serial->fd = create_anonymous_fd( &serial_fd_ops, unix_fd, &serial->obj )))
152 release_object( serial );
158 static struct fd *serial_get_fd( struct object *obj )
160 struct serial *serial = (struct serial *)obj;
161 return (struct fd *)grab_object( serial->fd );
164 static void serial_destroy( struct object *obj)
166 struct serial *serial = (struct serial *)obj;
168 destroy_async_queue(&serial->read_q);
169 destroy_async_queue(&serial->write_q);
170 destroy_async_queue(&serial->wait_q);
171 if (serial->fd) release_object( serial->fd );
174 static void serial_dump( struct object *obj, int verbose )
176 struct serial *serial = (struct serial *)obj;
177 assert( obj->ops == &serial_ops );
178 fprintf( stderr, "Port fd=%p mask=%x\n", serial->fd, serial->eventmask );
181 static struct serial *get_serial_obj( struct process *process, obj_handle_t handle, unsigned int access )
183 return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
186 static int serial_get_poll_events( struct fd *fd )
188 struct serial *serial = get_fd_user( fd );
190 assert( serial->obj.ops == &serial_ops );
192 if(IS_READY(serial->read_q))
194 if(IS_READY(serial->write_q))
196 if(IS_READY(serial->wait_q))
199 /* fprintf(stderr,"poll events are %04x\n",events); */
204 static int serial_get_info( struct fd *fd )
207 struct serial *serial = get_fd_user( fd );
208 assert( serial->obj.ops == &serial_ops );
210 if (!(serial->options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)))
211 flags |= FD_FLAG_OVERLAPPED;
212 else if (!(serial->readinterval == MAXDWORD &&
213 serial->readmult == 0 && serial->readconst == 0))
214 flags |= FD_FLAG_TIMEOUT;
215 if (serial->readinterval == MAXDWORD &&
216 serial->readmult == 0 && serial->readconst == 0)
217 flags |= FD_FLAG_AVAILABLE;
222 static void serial_poll_event(struct fd *fd, int event)
224 struct serial *serial = get_fd_user( fd );
226 /* fprintf(stderr,"Poll event %02x\n",event); */
228 if(IS_READY(serial->read_q) && (POLLIN & event) )
229 async_notify(serial->read_q.head,STATUS_ALERTED);
231 if(IS_READY(serial->write_q) && (POLLOUT & event) )
232 async_notify(serial->write_q.head,STATUS_ALERTED);
234 if(IS_READY(serial->wait_q) && (POLLIN & event) )
235 async_notify(serial->wait_q.head,STATUS_ALERTED);
237 set_fd_events( fd, serial_get_poll_events(fd) );
240 static void serial_queue_async(struct fd *fd, void *ptr, unsigned int status, int type, int count)
242 struct serial *serial = get_fd_user( fd );
243 struct async_queue *q;
247 assert(serial->obj.ops == &serial_ops);
251 case ASYNC_TYPE_READ:
253 timeout = serial->readconst + serial->readmult*count;
255 case ASYNC_TYPE_WAIT:
259 case ASYNC_TYPE_WRITE:
260 q = &serial->write_q;
261 timeout = serial->writeconst + serial->writemult*count;
264 set_error(STATUS_INVALID_PARAMETER);
268 async = find_async ( q, current, ptr );
270 if ( status == STATUS_PENDING )
275 async = create_async ( &serial->obj, current, ptr );
279 async->status = STATUS_PENDING;
282 async_add_timeout(async,timeout);
283 async_insert(q, async);
286 /* Check if the new pending request can be served immediately */
287 events = check_fd_events( fd, serial_get_poll_events( fd ) );
290 /* serial_poll_event() calls set_select_events() */
291 serial_poll_event( fd, events );
295 else if ( async ) destroy_async ( async );
296 else set_error ( STATUS_INVALID_PARAMETER );
298 set_fd_events ( fd, serial_get_poll_events( fd ) );
301 static int serial_flush( struct fd *fd, struct event **event )
303 /* MSDN says: If hFile is a handle to a communications device,
304 * the function only flushes the transmit buffer.
306 int ret = (tcflush( get_unix_fd(fd), TCOFLUSH ) != -1);
307 if (!ret) file_set_error();
311 DECL_HANDLER(get_serial_info)
313 struct serial *serial;
315 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
318 reply->readinterval = serial->readinterval;
319 reply->readconst = serial->readconst;
320 reply->readmult = serial->readmult;
321 reply->writeconst = serial->writeconst;
322 reply->writemult = serial->writemult;
325 reply->eventmask = serial->eventmask;
327 /* comm port error status */
328 reply->commerror = serial->commerror;
330 release_object( serial );
334 DECL_HANDLER(set_serial_info)
336 struct serial *serial;
338 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
341 if(req->flags & SERIALINFO_SET_TIMEOUTS)
343 serial->readinterval = req->readinterval;
344 serial->readconst = req->readconst;
345 serial->readmult = req->readmult;
346 serial->writeconst = req->writeconst;
347 serial->writemult = req->writemult;
351 if(req->flags & SERIALINFO_SET_MASK)
353 serial->eventmask = req->eventmask;
354 if(!serial->eventmask)
356 while(serial->wait_q.head)
358 async_notify(serial->wait_q.head, STATUS_SUCCESS);
359 destroy_async(serial->wait_q.head);
364 /* comm port error status */
365 if(req->flags & SERIALINFO_SET_ERROR)
367 serial->commerror = req->commerror;
370 release_object( serial );