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>
57 static void serial_dump( struct object *obj, int verbose );
58 static struct fd *serial_get_fd( struct object *obj );
59 static void serial_destroy(struct object *obj);
61 static int serial_get_poll_events( struct fd *fd );
62 static void serial_poll_event( struct fd *fd, int event );
63 static int serial_get_info( struct fd *fd );
64 static int serial_flush( struct fd *fd, struct event **event );
65 static void serial_queue_async( struct fd *fd, void *apc, void *user, void *iosb, int type, int count );
66 static void serial_cancel_async( struct fd *fd );
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;
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 no_signal, /* signal */
102 serial_get_fd, /* get_fd */
103 no_close_handle, /* close_handle */
104 serial_destroy /* destroy */
107 static const struct fd_ops serial_fd_ops =
109 serial_get_poll_events, /* get_poll_events */
110 serial_poll_event, /* poll_event */
111 serial_flush, /* flush */
112 serial_get_info, /* get_file_info */
113 serial_queue_async, /* queue_async */
114 serial_cancel_async /* cancel_async */
117 /* check if the given fd is a serial port */
118 int is_serial_fd( struct fd *fd )
122 return !tcgetattr( get_unix_fd(fd), &tios );
125 /* create a serial object for a given fd */
126 struct object *create_serial( struct fd *fd, unsigned int options )
128 struct serial *serial;
131 if ((unix_fd = dup( get_unix_fd(fd) )) == -1) return NULL;
133 /* set the fd back to blocking if necessary */
134 if (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT))
135 fcntl( unix_fd, F_SETFL, 0 );
137 if (!(serial = alloc_object( &serial_ops )))
142 serial->options = options;
143 serial->readinterval = 0;
144 serial->readmult = 0;
145 serial->readconst = 0;
146 serial->writemult = 0;
147 serial->writeconst = 0;
148 serial->eventmask = 0;
149 serial->commerror = 0;
150 list_init( &serial->read_q );
151 list_init( &serial->write_q );
152 list_init( &serial->wait_q );
153 if (!(serial->fd = create_anonymous_fd( &serial_fd_ops, unix_fd, &serial->obj )))
155 release_object( serial );
161 static struct fd *serial_get_fd( struct object *obj )
163 struct serial *serial = (struct serial *)obj;
164 return (struct fd *)grab_object( serial->fd );
167 static void serial_destroy( struct object *obj)
169 struct serial *serial = (struct serial *)obj;
171 async_terminate_queue( &serial->read_q, STATUS_CANCELLED );
172 async_terminate_queue( &serial->write_q, STATUS_CANCELLED );
173 async_terminate_queue( &serial->wait_q, STATUS_CANCELLED );
174 if (serial->fd) release_object( serial->fd );
177 static void serial_dump( struct object *obj, int verbose )
179 struct serial *serial = (struct serial *)obj;
180 assert( obj->ops == &serial_ops );
181 fprintf( stderr, "Port fd=%p mask=%x\n", serial->fd, serial->eventmask );
184 static struct serial *get_serial_obj( struct process *process, obj_handle_t handle, unsigned int access )
186 return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
189 static int serial_get_poll_events( struct fd *fd )
191 struct serial *serial = get_fd_user( fd );
193 assert( serial->obj.ops == &serial_ops );
195 if (!list_empty( &serial->read_q )) events |= POLLIN;
196 if (!list_empty( &serial->write_q )) events |= POLLOUT;
197 if (!list_empty( &serial->wait_q )) events |= POLLIN;
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 (!list_empty( &serial->read_q ) && (POLLIN & event) )
229 async_terminate_head( &serial->read_q, STATUS_ALERTED );
231 if (!list_empty( &serial->write_q ) && (POLLOUT & event) )
232 async_terminate_head( &serial->write_q, STATUS_ALERTED );
234 if (!list_empty( &serial->wait_q ) && (POLLIN & event) )
235 async_terminate_head( &serial->wait_q, STATUS_ALERTED );
237 set_fd_events( fd, serial_get_poll_events(fd) );
240 static void serial_queue_async( struct fd *fd, void *apc, void *user, void *iosb,
241 int type, int count )
243 struct serial *serial = get_fd_user( fd );
248 assert(serial->obj.ops == &serial_ops);
252 case ASYNC_TYPE_READ:
253 queue = &serial->read_q;
254 timeout = serial->readconst + serial->readmult*count;
256 case ASYNC_TYPE_WAIT:
257 queue = &serial->wait_q;
260 case ASYNC_TYPE_WRITE:
261 queue = &serial->write_q;
262 timeout = serial->writeconst + serial->writemult*count;
265 set_error(STATUS_INVALID_PARAMETER);
269 if (!create_async( current, &timeout, queue, apc, user, iosb ))
272 /* Check if the new pending request can be served immediately */
273 events = check_fd_events( fd, serial_get_poll_events( fd ) );
276 /* serial_poll_event() calls set_select_events() */
277 serial_poll_event( fd, events );
281 set_fd_events( fd, serial_get_poll_events( fd ) );
284 static void serial_cancel_async( struct fd *fd )
286 struct serial *serial = get_fd_user( fd );
287 assert(serial->obj.ops == &serial_ops);
289 async_terminate_queue( &serial->read_q, STATUS_CANCELLED );
290 async_terminate_queue( &serial->write_q, STATUS_CANCELLED );
291 async_terminate_queue( &serial->wait_q, STATUS_CANCELLED );
294 static int serial_flush( struct fd *fd, struct event **event )
296 /* MSDN says: If hFile is a handle to a communications device,
297 * the function only flushes the transmit buffer.
299 int ret = (tcflush( get_unix_fd(fd), TCOFLUSH ) != -1);
300 if (!ret) file_set_error();
304 DECL_HANDLER(get_serial_info)
306 struct serial *serial;
308 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
311 reply->readinterval = serial->readinterval;
312 reply->readconst = serial->readconst;
313 reply->readmult = serial->readmult;
314 reply->writeconst = serial->writeconst;
315 reply->writemult = serial->writemult;
318 reply->eventmask = serial->eventmask;
320 /* comm port error status */
321 reply->commerror = serial->commerror;
323 release_object( serial );
327 DECL_HANDLER(set_serial_info)
329 struct serial *serial;
331 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
334 if (req->flags & SERIALINFO_SET_TIMEOUTS)
336 serial->readinterval = req->readinterval;
337 serial->readconst = req->readconst;
338 serial->readmult = req->readmult;
339 serial->writeconst = req->writeconst;
340 serial->writemult = req->writemult;
344 if (req->flags & SERIALINFO_SET_MASK)
346 serial->eventmask = req->eventmask;
347 if (!serial->eventmask)
349 async_terminate_queue( &serial->wait_q, STATUS_SUCCESS );
353 /* comm port error status */
354 if (req->flags & SERIALINFO_SET_ERROR)
356 serial->commerror = req->commerror;
359 release_object( serial );