?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
doc: Expanded introductory text.
[libserialport/gsi.git] / serialport.c
blobda292ac650ffff5e1099733fe58271cf16b60248
1 /*
2 * This file is part of the libserialport project.
3 *
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5 * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de>
6 * Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li>
7 * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
8 * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
9 *
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU Lesser General Public License as
12 * published by the Free Software Foundation, either version 3 of the
13 * License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "libserialport.h"
25 #include "libserialport_internal.h"
26
27 static const struct std_baudrate std_baudrates[] = {
28 #ifdef _WIN32
29 /*
30 * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
31 * have documented CBR_* macros.
32 */
33 BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
34 BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
35 BAUD(115200), BAUD(128000), BAUD(256000),
36 #else
37 BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
38 BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
39 BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
40 BAUD(230400),
41 #if !defined(__APPLE__) && !defined(__OpenBSD__)
42 BAUD(460800),
43 #endif
44 #endif
45 };
46
47 #define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
48
49 void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;
50
51 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
52 struct sp_port_config *config);
53
54 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
55 const struct sp_port_config *config);
56
57 SP_API enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
58 {
59 struct sp_port *port;
60 #ifndef NO_PORT_METADATA
61 enum sp_return ret;
62 #endif
63 int len;
64
65 TRACE("%s, %p", portname, port_ptr);
66
67 if (!port_ptr)
68 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
69
70 *port_ptr = NULL;
71
72 if (!portname)
73 RETURN_ERROR(SP_ERR_ARG, "Null port name");
74
75 DEBUG_FMT("Building structure for port %s", portname);
76
77 if (!(port = malloc(sizeof(struct sp_port))))
78 RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed");
79
80 len = strlen(portname) + 1;
81
82 if (!(port->name = malloc(len))) {
83 free(port);
84 RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed");
85 }
86
87 memcpy(port->name, portname, len);
88
89 #ifdef _WIN32
90 port->usb_path = NULL;
91 port->hdl = INVALID_HANDLE_VALUE;
92 #else
93 port->fd = -1;
94 #endif
95
96 port->description = NULL;
97 port->transport = SP_TRANSPORT_NATIVE;
98 port->usb_bus = -1;
99 port->usb_address = -1;
100 port->usb_vid = -1;
101 port->usb_pid = -1;
102 port->usb_manufacturer = NULL;
103 port->usb_product = NULL;
104 port->usb_serial = NULL;
105 port->bluetooth_address = NULL;
106
107 #ifndef NO_PORT_METADATA
108 if ((ret = get_port_details(port)) != SP_OK) {
109 sp_free_port(port);
110 return ret;
111 }
112 #endif
113
114 *port_ptr = port;
115
116 RETURN_OK();
117 }
118
119 SP_API char *sp_get_port_name(const struct sp_port *port)
120 {
121 TRACE("%p", port);
122
123 if (!port)
124 return NULL;
125
126 RETURN_STRING(port->name);
127 }
128
129 SP_API char *sp_get_port_description(const struct sp_port *port)
130 {
131 TRACE("%p", port);
132
133 if (!port || !port->description)
134 return NULL;
135
136 RETURN_STRING(port->description);
137 }
138
139 SP_API enum sp_transport sp_get_port_transport(const struct sp_port *port)
140 {
141 TRACE("%p", port);
142
143 if (!port)
144 RETURN_ERROR(SP_ERR_ARG, "Null port");
145
146 RETURN_INT(port->transport);
147 }
148
149 SP_API enum sp_return sp_get_port_usb_bus_address(const struct sp_port *port,
150 int *usb_bus,int *usb_address)
151 {
152 TRACE("%p", port);
153
154 if (!port)
155 RETURN_ERROR(SP_ERR_ARG, "Null port");
156 if (port->transport != SP_TRANSPORT_USB)
157 RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
158 if (port->usb_bus < 0 || port->usb_address < 0)
159 RETURN_ERROR(SP_ERR_SUPP, "Bus and address values are not available");
160
161 if (usb_bus)
162 *usb_bus = port->usb_bus;
163 if (usb_address)
164 *usb_address = port->usb_address;
165
166 RETURN_OK();
167 }
168
169 SP_API enum sp_return sp_get_port_usb_vid_pid(const struct sp_port *port,
170 int *usb_vid, int *usb_pid)
171 {
172 TRACE("%p", port);
173
174 if (!port)
175 RETURN_ERROR(SP_ERR_ARG, "Null port");
176 if (port->transport != SP_TRANSPORT_USB)
177 RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
178 if (port->usb_vid < 0 || port->usb_pid < 0)
179 RETURN_ERROR(SP_ERR_SUPP, "VID:PID values are not available");
180
181 if (usb_vid)
182 *usb_vid = port->usb_vid;
183 if (usb_pid)
184 *usb_pid = port->usb_pid;
185
186 RETURN_OK();
187 }
188
189 SP_API char *sp_get_port_usb_manufacturer(const struct sp_port *port)
190 {
191 TRACE("%p", port);
192
193 if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_manufacturer)
194 return NULL;
195
196 RETURN_STRING(port->usb_manufacturer);
197 }
198
199 SP_API char *sp_get_port_usb_product(const struct sp_port *port)
200 {
201 TRACE("%p", port);
202
203 if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_product)
204 return NULL;
205
206 RETURN_STRING(port->usb_product);
207 }
208
209 SP_API char *sp_get_port_usb_serial(const struct sp_port *port)
210 {
211 TRACE("%p", port);
212
213 if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_serial)
214 return NULL;
215
216 RETURN_STRING(port->usb_serial);
217 }
218
219 SP_API char *sp_get_port_bluetooth_address(const struct sp_port *port)
220 {
221 TRACE("%p", port);
222
223 if (!port || port->transport != SP_TRANSPORT_BLUETOOTH
224 || !port->bluetooth_address)
225 return NULL;
226
227 RETURN_STRING(port->bluetooth_address);
228 }
229
230 SP_API enum sp_return sp_get_port_handle(const struct sp_port *port,
231 void *result_ptr)
232 {
233 TRACE("%p, %p", port, result_ptr);
234
235 if (!port)
236 RETURN_ERROR(SP_ERR_ARG, "Null port");
237 if (!result_ptr)
238 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
239
240 #ifdef _WIN32
241 HANDLE *handle_ptr = result_ptr;
242 *handle_ptr = port->hdl;
243 #else
244 int *fd_ptr = result_ptr;
245 *fd_ptr = port->fd;
246 #endif
247
248 RETURN_OK();
249 }
250
251 SP_API enum sp_return sp_copy_port(const struct sp_port *port,
252 struct sp_port **copy_ptr)
253 {
254 TRACE("%p, %p", port, copy_ptr);
255
256 if (!copy_ptr)
257 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
258
259 *copy_ptr = NULL;
260
261 if (!port)
262 RETURN_ERROR(SP_ERR_ARG, "Null port");
263
264 if (!port->name)
265 RETURN_ERROR(SP_ERR_ARG, "Null port name");
266
267 DEBUG("Copying port structure");
268
269 RETURN_INT(sp_get_port_by_name(port->name, copy_ptr));
270 }
271
272 SP_API void sp_free_port(struct sp_port *port)
273 {
274 TRACE("%p", port);
275
276 if (!port) {
277 DEBUG("Null port");
278 RETURN();
279 }
280
281 DEBUG("Freeing port structure");
282
283 if (port->name)
284 free(port->name);
285 if (port->description)
286 free(port->description);
287 if (port->usb_manufacturer)
288 free(port->usb_manufacturer);
289 if (port->usb_product)
290 free(port->usb_product);
291 if (port->usb_serial)
292 free(port->usb_serial);
293 if (port->bluetooth_address)
294 free(port->bluetooth_address);
295 #ifdef _WIN32
296 if (port->usb_path)
297 free(port->usb_path);
298 #endif
299
300 free(port);
301
302 RETURN();
303 }
304
305 SP_PRIV struct sp_port **list_append(struct sp_port **list,
306 const char *portname)
307 {
308 void *tmp;
309 unsigned int count;
310
311 for (count = 0; list[count]; count++);
312 if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
313 goto fail;
314 list = tmp;
315 if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
316 goto fail;
317 list[count + 1] = NULL;
318 return list;
319
320 fail:
321 sp_free_port_list(list);
322 return NULL;
323 }
324
325 SP_API enum sp_return sp_list_ports(struct sp_port ***list_ptr)
326 {
327 #ifndef NO_ENUMERATION
328 struct sp_port **list;
329 int ret;
330 #endif
331
332 TRACE("%p", list_ptr);
333
334 if (!list_ptr)
335 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
336
337 *list_ptr = NULL;
338
339 #ifdef NO_ENUMERATION
340 RETURN_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
341 #else
342 DEBUG("Enumerating ports");
343
344 if (!(list = malloc(sizeof(struct sp_port *))))
345 RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
346
347 list[0] = NULL;
348
349 ret = list_ports(&list);
350
351 if (ret == SP_OK) {
352 *list_ptr = list;
353 } else {
354 sp_free_port_list(list);
355 *list_ptr = NULL;
356 }
357
358 RETURN_CODEVAL(ret);
359 #endif
360 }
361
362 SP_API void sp_free_port_list(struct sp_port **list)
363 {
364 unsigned int i;
365
366 TRACE("%p", list);
367
368 if (!list) {
369 DEBUG("Null list");
370 RETURN();
371 }
372
373 DEBUG("Freeing port list");
374
375 for (i = 0; list[i]; i++)
376 sp_free_port(list[i]);
377 free(list);
378
379 RETURN();
380 }
381
382 #define CHECK_PORT() do { \
383 if (!port) \
384 RETURN_ERROR(SP_ERR_ARG, "Null port"); \
385 if (!port->name) \
386 RETURN_ERROR(SP_ERR_ARG, "Null port name"); \
387 } while (0)
388 #ifdef _WIN32
389 #define CHECK_PORT_HANDLE() do { \
390 if (port->hdl == INVALID_HANDLE_VALUE) \
391 RETURN_ERROR(SP_ERR_ARG, "Invalid port handle"); \
392 } while (0)
393 #else
394 #define CHECK_PORT_HANDLE() do { \
395 if (port->fd < 0) \
396 RETURN_ERROR(SP_ERR_ARG, "Invalid port fd"); \
397 } while (0)
398 #endif
399 #define CHECK_OPEN_PORT() do { \
400 CHECK_PORT(); \
401 CHECK_PORT_HANDLE(); \
402 } while (0)
403
404 #ifdef WIN32
405 /** To be called after port receive buffer is emptied. */
406 static enum sp_return restart_wait(struct sp_port *port)
407 {
408 DWORD wait_result;
409
410 if (port->wait_running) {
411 /* Check status of running wait operation. */
412 if (GetOverlappedResult(port->hdl, &port->wait_ovl,
413 &wait_result, FALSE)) {
414 DEBUG("Previous wait completed");
415 port->wait_running = FALSE;
416 } else if (GetLastError() == ERROR_IO_INCOMPLETE) {
417 DEBUG("Previous wait still running");
418 RETURN_OK();
419 } else {
420 RETURN_FAIL("GetOverlappedResult() failed");
421 }
422 }
423
424 if (!port->wait_running) {
425 /* Start new wait operation. */
426 if (WaitCommEvent(port->hdl, &port->events,
427 &port->wait_ovl)) {
428 DEBUG("New wait returned, events already pending");
429 } else if (GetLastError() == ERROR_IO_PENDING) {
430 DEBUG("New wait running in background");
431 port->wait_running = TRUE;
432 } else {
433 RETURN_FAIL("WaitCommEvent() failed");
434 }
435 }
436
437 RETURN_OK();
438 }
439 #endif
440
441 SP_API enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
442 {
443 struct port_data data;
444 struct sp_port_config config;
445 enum sp_return ret;
446
447 TRACE("%p, 0x%x", port, flags);
448
449 CHECK_PORT();
450
451 if (flags > SP_MODE_READ_WRITE)
452 RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
453
454 DEBUG_FMT("Opening port %s", port->name);
455
456 #ifdef _WIN32
457 DWORD desired_access = 0, flags_and_attributes = 0, errors;
458 char *escaped_port_name;
459 COMSTAT status;
460
461 /* Prefix port name with '\\.\' to work with ports above COM9. */
462 if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
463 RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
464 sprintf(escaped_port_name, "\\\\.\\%s", port->name);
465
466 /* Map 'flags' to the OS-specific settings. */
467 flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
468 if (flags & SP_MODE_READ)
469 desired_access |= GENERIC_READ;
470 if (flags & SP_MODE_WRITE)
471 desired_access |= GENERIC_WRITE;
472
473 port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
474 OPEN_EXISTING, flags_and_attributes, 0);
475
476 free(escaped_port_name);
477
478 if (port->hdl == INVALID_HANDLE_VALUE)
479 RETURN_FAIL("Port CreateFile() failed");
480
481 /* All timeouts initially disabled. */
482 port->timeouts.ReadIntervalTimeout = 0;
483 port->timeouts.ReadTotalTimeoutMultiplier = 0;
484 port->timeouts.ReadTotalTimeoutConstant = 0;
485 port->timeouts.WriteTotalTimeoutMultiplier = 0;
486 port->timeouts.WriteTotalTimeoutConstant = 0;
487
488 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
489 sp_close(port);
490 RETURN_FAIL("SetCommTimeouts() failed");
491 }
492
493 /* Prepare OVERLAPPED structures. */
494 #define INIT_OVERLAPPED(ovl) do { \
495 memset(&port->ovl, 0, sizeof(port->ovl)); \
496 port->ovl.hEvent = INVALID_HANDLE_VALUE; \
497 if ((port->ovl.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL)) \
498 == INVALID_HANDLE_VALUE) { \
499 sp_close(port); \
500 RETURN_FAIL(#ovl "CreateEvent() failed"); \
501 } \
502 } while (0)
503
504 INIT_OVERLAPPED(read_ovl);
505 INIT_OVERLAPPED(write_ovl);
506 INIT_OVERLAPPED(wait_ovl);
507
508 /* Set event mask for RX and error events. */
509 if (SetCommMask(port->hdl, EV_RXCHAR | EV_ERR) == 0) {
510 sp_close(port);
511 RETURN_FAIL("SetCommMask() failed");
512 }
513
514 port->writing = FALSE;
515 port->wait_running = FALSE;
516
517 ret = restart_wait(port);
518
519 if (ret < 0) {
520 sp_close(port);
521 RETURN_CODEVAL(ret);
522 }
523 #else
524 int flags_local = O_NONBLOCK | O_NOCTTY;
525
526 /* Map 'flags' to the OS-specific settings. */
527 if ((flags & SP_MODE_READ_WRITE) == SP_MODE_READ_WRITE)
528 flags_local |= O_RDWR;
529 else if (flags & SP_MODE_READ)
530 flags_local |= O_RDONLY;
531 else if (flags & SP_MODE_WRITE)
532 flags_local |= O_WRONLY;
533
534 if ((port->fd = open(port->name, flags_local)) < 0)
535 RETURN_FAIL("open() failed");
536 #endif
537
538 ret = get_config(port, &data, &config);
539
540 if (ret < 0) {
541 sp_close(port);
542 RETURN_CODEVAL(ret);
543 }
544
545 /* Set sane port settings. */
546 #ifdef _WIN32
547 data.dcb.fBinary = TRUE;
548 data.dcb.fDsrSensitivity = FALSE;
549 data.dcb.fErrorChar = FALSE;
550 data.dcb.fNull = FALSE;
551 data.dcb.fAbortOnError = FALSE;
552 #else
553 /* Turn off all fancy termios tricks, give us a raw channel. */
554 data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
555 #ifdef IUCLC
556 data.term.c_iflag &= ~IUCLC;
557 #endif
558 data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
559 #ifdef OLCUC
560 data.term.c_oflag &= ~OLCUC;
561 #endif
562 #ifdef NLDLY
563 data.term.c_oflag &= ~NLDLY;
564 #endif
565 #ifdef CRDLY
566 data.term.c_oflag &= ~CRDLY;
567 #endif
568 #ifdef TABDLY
569 data.term.c_oflag &= ~TABDLY;
570 #endif
571 #ifdef BSDLY
572 data.term.c_oflag &= ~BSDLY;
573 #endif
574 #ifdef VTDLY
575 data.term.c_oflag &= ~VTDLY;
576 #endif
577 #ifdef FFDLY
578 data.term.c_oflag &= ~FFDLY;
579 #endif
580 #ifdef OFILL
581 data.term.c_oflag &= ~OFILL;
582 #endif
583 data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
584 data.term.c_cc[VMIN] = 0;
585 data.term.c_cc[VTIME] = 0;
586
587 /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
588 data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
589 #endif
590
591 #ifdef _WIN32
592 if (ClearCommError(port->hdl, &errors, &status) == 0)
593 RETURN_FAIL("ClearCommError() failed");
594 #endif
595
596 ret = set_config(port, &data, &config);
597
598 if (ret < 0) {
599 sp_close(port);
600 RETURN_CODEVAL(ret);
601 }
602
603 RETURN_OK();
604 }
605
606 SP_API enum sp_return sp_close(struct sp_port *port)
607 {
608 TRACE("%p", port);
609
610 CHECK_OPEN_PORT();
611
612 DEBUG_FMT("Closing port %s", port->name);
613
614 #ifdef _WIN32
615 /* Returns non-zero upon success, 0 upon failure. */
616 if (CloseHandle(port->hdl) == 0)
617 RETURN_FAIL("Port CloseHandle() failed");
618 port->hdl = INVALID_HANDLE_VALUE;
619
620 /* Close event handles for overlapped structures. */
621 #define CLOSE_OVERLAPPED(ovl) do { \
622 if (port->ovl.hEvent != INVALID_HANDLE_VALUE && \
623 CloseHandle(port->ovl.hEvent) == 0) \
624 RETURN_FAIL(# ovl "event CloseHandle() failed"); \
625 } while (0)
626 CLOSE_OVERLAPPED(read_ovl);
627 CLOSE_OVERLAPPED(write_ovl);
628 CLOSE_OVERLAPPED(wait_ovl);
629
630 #else
631 /* Returns 0 upon success, -1 upon failure. */
632 if (close(port->fd) == -1)
633 RETURN_FAIL("close() failed");
634 port->fd = -1;
635 #endif
636
637 RETURN_OK();
638 }
639
640 SP_API enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
641 {
642 TRACE("%p, 0x%x", port, buffers);
643
644 CHECK_OPEN_PORT();
645
646 if (buffers > SP_BUF_BOTH)
647 RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
648
649 const char *buffer_names[] = {"no", "input", "output", "both"};
650
651 DEBUG_FMT("Flushing %s buffers on port %s",
652 buffer_names[buffers], port->name);
653
654 #ifdef _WIN32
655 DWORD flags = 0;
656 if (buffers & SP_BUF_INPUT)
657 flags |= PURGE_RXCLEAR;
658 if (buffers & SP_BUF_OUTPUT)
659 flags |= PURGE_TXCLEAR;
660
661 /* Returns non-zero upon success, 0 upon failure. */
662 if (PurgeComm(port->hdl, flags) == 0)
663 RETURN_FAIL("PurgeComm() failed");
664
665 if (buffers & SP_BUF_INPUT)
666 TRY(restart_wait(port));
667 #else
668 int flags = 0;
669 if (buffers == SP_BUF_BOTH)
670 flags = TCIOFLUSH;
671 else if (buffers == SP_BUF_INPUT)
672 flags = TCIFLUSH;
673 else if (buffers == SP_BUF_OUTPUT)
674 flags = TCOFLUSH;
675
676 /* Returns 0 upon success, -1 upon failure. */
677 if (tcflush(port->fd, flags) < 0)
678 RETURN_FAIL("tcflush() failed");
679 #endif
680 RETURN_OK();
681 }
682
683 SP_API enum sp_return sp_drain(struct sp_port *port)
684 {
685 TRACE("%p", port);
686
687 CHECK_OPEN_PORT();
688
689 DEBUG_FMT("Draining port %s", port->name);
690
691 #ifdef _WIN32
692 /* Returns non-zero upon success, 0 upon failure. */
693 if (FlushFileBuffers(port->hdl) == 0)
694 RETURN_FAIL("FlushFileBuffers() failed");
695 RETURN_OK();
696 #else
697 int result;
698 while (1) {
699 #ifdef __ANDROID__
700 int arg = 1;
701 result = ioctl(port->fd, TCSBRK, &arg);
702 #else
703 result = tcdrain(port->fd);
704 #endif
705 if (result < 0) {
706 if (errno == EINTR) {
707 DEBUG("tcdrain() was interrupted");
708 continue;
709 } else {
710 RETURN_FAIL("tcdrain() failed");
711 }
712 } else {
713 RETURN_OK();
714 }
715 }
716 #endif
717 }
718
719 SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
720 size_t count, unsigned int timeout_ms)
721 {
722 TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
723
724 CHECK_OPEN_PORT();
725
726 if (!buf)
727 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
728
729 if (timeout_ms)
730 DEBUG_FMT("Writing %d bytes to port %s, timeout %d ms",
731 count, port->name, timeout_ms);
732 else
733 DEBUG_FMT("Writing %d bytes to port %s, no timeout",
734 count, port->name);
735
736 if (count == 0)
737 RETURN_INT(0);
738
739 #ifdef _WIN32
740 DWORD bytes_written = 0;
741 BOOL result;
742
743 /* Wait for previous non-blocking write to complete, if any. */
744 if (port->writing) {
745 DEBUG("Waiting for previous write to complete");
746 result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
747 port->writing = 0;
748 if (!result)
749 RETURN_FAIL("Previous write failed to complete");
750 DEBUG("Previous write completed");
751 }
752
753 /* Set timeout. */
754 if (port->timeouts.WriteTotalTimeoutConstant != timeout_ms) {
755 port->timeouts.WriteTotalTimeoutConstant = timeout_ms;
756 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
757 RETURN_FAIL("SetCommTimeouts() failed");
758 }
759
760 /* Start write. */
761 if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl)) {
762 DEBUG("Write completed immediately");
763 RETURN_INT(count);
764 } else if (GetLastError() == ERROR_IO_PENDING) {
765 DEBUG("Waiting for write to complete");
766 if (GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE) == 0)
767 RETURN_FAIL("GetOverlappedResult() failed");
768 DEBUG_FMT("Write completed, %d/%d bytes written", bytes_written, count);
769 RETURN_INT(bytes_written);
770 } else {
771 RETURN_FAIL("WriteFile() failed");
772 }
773 #else
774 size_t bytes_written = 0;
775 unsigned char *ptr = (unsigned char *) buf;
776 struct timeval start, delta, now, end = {0, 0};
777 int started = 0;
778 fd_set fds;
779 int result;
780
781 if (timeout_ms) {
782 /* Get time at start of operation. */
783 gettimeofday(&start, NULL);
784 /* Define duration of timeout. */
785 delta.tv_sec = timeout_ms / 1000;
786 delta.tv_usec = (timeout_ms % 1000) * 1000;
787 /* Calculate time at which we should give up. */
788 timeradd(&start, &delta, &end);
789 }
790
791 FD_ZERO(&fds);
792 FD_SET(port->fd, &fds);
793
794 /* Loop until we have written the requested number of bytes. */
795 while (bytes_written < count) {
796 /*
797 * Check timeout only if we have run select() at least once,
798 * to avoid any issues if a short timeout is reached before
799 * select() is even run.
800 */
801 if (timeout_ms && started) {
802 gettimeofday(&now, NULL);
803 if (timercmp(&now, &end, >))
804 /* Timeout has expired. */
805 break;
806 timersub(&end, &now, &delta);
807 }
808 result = select(port->fd + 1, NULL, &fds, NULL, timeout_ms ? &delta : NULL);
809 started = 1;
810 if (result < 0) {
811 if (errno == EINTR) {
812 DEBUG("select() call was interrupted, repeating");
813 continue;
814 } else {
815 RETURN_FAIL("select() failed");
816 }
817 } else if (result == 0) {
818 /* Timeout has expired. */
819 break;
820 }
821
822 /* Do write. */
823 result = write(port->fd, ptr, count - bytes_written);
824
825 if (result < 0) {
826 if (errno == EAGAIN)
827 /* This shouldn't happen because we did a select() first, but handle anyway. */
828 continue;
829 else
830 /* This is an actual failure. */
831 RETURN_FAIL("write() failed");
832 }
833
834 bytes_written += result;
835 ptr += result;
836 }
837
838 if (bytes_written < count)
839 DEBUG("Write timed out");
840
841 RETURN_INT(bytes_written);
842 #endif
843 }
844
845 SP_API enum sp_return sp_nonblocking_write(struct sp_port *port,
846 const void *buf, size_t count)
847 {
848 TRACE("%p, %p, %d", port, buf, count);
849
850 CHECK_OPEN_PORT();
851
852 if (!buf)
853 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
854
855 DEBUG_FMT("Writing up to %d bytes to port %s", count, port->name);
856
857 if (count == 0)
858 RETURN_INT(0);
859
860 #ifdef _WIN32
861 DWORD written = 0;
862 BYTE *ptr = (BYTE *) buf;
863
864 /* Check whether previous write is complete. */
865 if (port->writing) {
866 if (HasOverlappedIoCompleted(&port->write_ovl)) {
867 DEBUG("Previous write completed");
868 port->writing = 0;
869 } else {
870 DEBUG("Previous write not complete");
871 /* Can't take a new write until the previous one finishes. */
872 RETURN_INT(0);
873 }
874 }
875
876 /* Set timeout. */
877 if (port->timeouts.WriteTotalTimeoutConstant != 0) {
878 port->timeouts.WriteTotalTimeoutConstant = 0;
879 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
880 RETURN_FAIL("SetCommTimeouts() failed");
881 }
882
883 /*
884 * Keep writing data until the OS has to actually start an async IO
885 * for it. At that point we know the buffer is full.
886 */
887 while (written < count) {
888 /* Copy first byte of user buffer. */
889 port->pending_byte = *ptr++;
890
891 /* Start asynchronous write. */
892 if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
893 if (GetLastError() == ERROR_IO_PENDING) {
894 if (HasOverlappedIoCompleted(&port->write_ovl)) {
895 DEBUG("Asynchronous write completed immediately");
896 port->writing = 0;
897 written++;
898 continue;
899 } else {
900 DEBUG("Asynchronous write running");
901 port->writing = 1;
902 RETURN_INT(++written);
903 }
904 } else {
905 /* Actual failure of some kind. */
906 RETURN_FAIL("WriteFile() failed");
907 }
908 } else {
909 DEBUG("Single byte written immediately");
910 written++;
911 }
912 }
913
914 DEBUG("All bytes written immediately");
915
916 RETURN_INT(written);
917 #else
918 /* Returns the number of bytes written, or -1 upon failure. */
919 ssize_t written = write(port->fd, buf, count);
920
921 if (written < 0)
922 RETURN_FAIL("write() failed");
923 else
924 RETURN_INT(written);
925 #endif
926 }
927
928 #ifdef _WIN32
929 /* Restart wait operation if buffer was emptied. */
930 static enum sp_return restart_wait_if_needed(struct sp_port *port, unsigned int bytes_read)
931 {
932 DWORD errors;
933 COMSTAT comstat;
934
935 if (bytes_read == 0)
936 RETURN_OK();
937
938 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
939 RETURN_FAIL("ClearCommError() failed");
940
941 if (comstat.cbInQue == 0)
942 TRY(restart_wait(port));
943
944 RETURN_OK();
945 }
946 #endif
947
948 SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
949 size_t count, unsigned int timeout_ms)
950 {
951 TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
952
953 CHECK_OPEN_PORT();
954
955 if (!buf)
956 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
957
958 if (timeout_ms)
959 DEBUG_FMT("Reading %d bytes from port %s, timeout %d ms",
960 count, port->name, timeout_ms);
961 else
962 DEBUG_FMT("Reading %d bytes from port %s, no timeout",
963 count, port->name);
964
965 if (count == 0)
966 RETURN_INT(0);
967
968 #ifdef _WIN32
969 DWORD bytes_read = 0;
970
971 /* Set timeout. */
972 if (port->timeouts.ReadIntervalTimeout != 0 ||
973 port->timeouts.ReadTotalTimeoutMultiplier != 0 ||
974 port->timeouts.ReadTotalTimeoutConstant != timeout_ms) {
975 port->timeouts.ReadIntervalTimeout = 0;
976 port->timeouts.ReadTotalTimeoutMultiplier = 0;
977 port->timeouts.ReadTotalTimeoutConstant = timeout_ms;
978 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
979 RETURN_FAIL("SetCommTimeouts() failed");
980 }
981
982 /* Start read. */
983 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl)) {
984 DEBUG("Read completed immediately");
985 bytes_read = count;
986 } else if (GetLastError() == ERROR_IO_PENDING) {
987 DEBUG("Waiting for read to complete");
988 if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
989 RETURN_FAIL("GetOverlappedResult() failed");
990 DEBUG_FMT("Read completed, %d/%d bytes read", bytes_read, count);
991 } else {
992 RETURN_FAIL("ReadFile() failed");
993 }
994
995 TRY(restart_wait_if_needed(port, bytes_read));
996
997 RETURN_INT(bytes_read);
998
999 #else
1000 size_t bytes_read = 0;
1001 unsigned char *ptr = (unsigned char *) buf;
1002 struct timeval start, delta, now, end = {0, 0};
1003 int started = 0;
1004 fd_set fds;
1005 int result;
1006
1007 if (timeout_ms) {
1008 /* Get time at start of operation. */
1009 gettimeofday(&start, NULL);
1010 /* Define duration of timeout. */
1011 delta.tv_sec = timeout_ms / 1000;
1012 delta.tv_usec = (timeout_ms % 1000) * 1000;
1013 /* Calculate time at which we should give up. */
1014 timeradd(&start, &delta, &end);
1015 }
1016
1017 FD_ZERO(&fds);
1018 FD_SET(port->fd, &fds);
1019
1020 /* Loop until we have the requested number of bytes. */
1021 while (bytes_read < count) {
1022 /*
1023 * Check timeout only if we have run select() at least once,
1024 * to avoid any issues if a short timeout is reached before
1025 * select() is even run.
1026 */
1027 if (timeout_ms && started) {
1028 gettimeofday(&now, NULL);
1029 if (timercmp(&now, &end, >))
1030 /* Timeout has expired. */
1031 break;
1032 timersub(&end, &now, &delta);
1033 }
1034 result = select(port->fd + 1, &fds, NULL, NULL, timeout_ms ? &delta : NULL);
1035 started = 1;
1036 if (result < 0) {
1037 if (errno == EINTR) {
1038 DEBUG("select() call was interrupted, repeating");
1039 continue;
1040 } else {
1041 RETURN_FAIL("select() failed");
1042 }
1043 } else if (result == 0) {
1044 /* Timeout has expired. */
1045 break;
1046 }
1047
1048 /* Do read. */
1049 result = read(port->fd, ptr, count - bytes_read);
1050
1051 if (result < 0) {
1052 if (errno == EAGAIN)
1053 /*
1054 * This shouldn't happen because we did a
1055 * select() first, but handle anyway.
1056 */
1057 continue;
1058 else
1059 /* This is an actual failure. */
1060 RETURN_FAIL("read() failed");
1061 }
1062
1063 bytes_read += result;
1064 ptr += result;
1065 }
1066
1067 if (bytes_read < count)
1068 DEBUG("Read timed out");
1069
1070 RETURN_INT(bytes_read);
1071 #endif
1072 }
1073
1074 SP_API enum sp_return sp_blocking_read_next(struct sp_port *port, void *buf,
1075 size_t count, unsigned int timeout_ms)
1076 {
1077 TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
1078
1079 CHECK_OPEN_PORT();
1080
1081 if (!buf)
1082 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1083
1084 if (count == 0)
1085 RETURN_ERROR(SP_ERR_ARG, "Zero count");
1086
1087 if (timeout_ms)
1088 DEBUG_FMT("Reading next max %d bytes from port %s, timeout %d ms",
1089 count, port->name, timeout_ms);
1090 else
1091 DEBUG_FMT("Reading next max %d bytes from port %s, no timeout",
1092 count, port->name);
1093
1094 #ifdef _WIN32
1095 DWORD bytes_read = 0;
1096
1097 /* If timeout_ms == 0, set maximum timeout. */
1098 DWORD timeout_val = (timeout_ms == 0 ? MAXDWORD - 1 : timeout_ms);
1099
1100 /* Set timeout. */
1101 if (port->timeouts.ReadIntervalTimeout != MAXDWORD ||
1102 port->timeouts.ReadTotalTimeoutMultiplier != MAXDWORD ||
1103 port->timeouts.ReadTotalTimeoutConstant != timeout_val) {
1104 port->timeouts.ReadIntervalTimeout = MAXDWORD;
1105 port->timeouts.ReadTotalTimeoutMultiplier = MAXDWORD;
1106 port->timeouts.ReadTotalTimeoutConstant = timeout_val;
1107 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1108 RETURN_FAIL("SetCommTimeouts() failed");
1109 }
1110
1111 /* Loop until we have at least one byte, or timeout is reached. */
1112 while (bytes_read == 0) {
1113 /* Start read. */
1114 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl)) {
1115 DEBUG("Read completed immediately");
1116 bytes_read = count;
1117 } else if (GetLastError() == ERROR_IO_PENDING) {
1118 DEBUG("Waiting for read to complete");
1119 if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
1120 RETURN_FAIL("GetOverlappedResult() failed");
1121 if (bytes_read > 0) {
1122 DEBUG("Read completed");
1123 } else if (timeout_ms > 0) {
1124 DEBUG("Read timed out");
1125 break;
1126 } else {
1127 DEBUG("Restarting read");
1128 }
1129 } else {
1130 RETURN_FAIL("ReadFile() failed");
1131 }
1132 }
1133
1134 TRY(restart_wait_if_needed(port, bytes_read));
1135
1136 RETURN_INT(bytes_read);
1137
1138 #else
1139 size_t bytes_read = 0;
1140 struct timeval start, delta, now, end = {0, 0};
1141 int started = 0;
1142 fd_set fds;
1143 int result;
1144
1145 if (timeout_ms) {
1146 /* Get time at start of operation. */
1147 gettimeofday(&start, NULL);
1148 /* Define duration of timeout. */
1149 delta.tv_sec = timeout_ms / 1000;
1150 delta.tv_usec = (timeout_ms % 1000) * 1000;
1151 /* Calculate time at which we should give up. */
1152 timeradd(&start, &delta, &end);
1153 }
1154
1155 FD_ZERO(&fds);
1156 FD_SET(port->fd, &fds);
1157
1158 /* Loop until we have at least one byte, or timeout is reached. */
1159 while (bytes_read == 0) {
1160 /*
1161 * Check timeout only if we have run select() at least once,
1162 * to avoid any issues if a short timeout is reached before
1163 * select() is even run.
1164 */
1165 if (timeout_ms && started) {
1166 gettimeofday(&now, NULL);
1167 if (timercmp(&now, &end, >))
1168 /* Timeout has expired. */
1169 break;
1170 timersub(&end, &now, &delta);
1171 }
1172 result = select(port->fd + 1, &fds, NULL, NULL, timeout_ms ? &delta : NULL);
1173 started = 1;
1174 if (result < 0) {
1175 if (errno == EINTR) {
1176 DEBUG("select() call was interrupted, repeating");
1177 continue;
1178 } else {
1179 RETURN_FAIL("select() failed");
1180 }
1181 } else if (result == 0) {
1182 /* Timeout has expired. */
1183 break;
1184 }
1185
1186 /* Do read. */
1187 result = read(port->fd, buf, count);
1188
1189 if (result < 0) {
1190 if (errno == EAGAIN)
1191 /* This shouldn't happen because we did a select() first, but handle anyway. */
1192 continue;
1193 else
1194 /* This is an actual failure. */
1195 RETURN_FAIL("read() failed");
1196 }
1197
1198 bytes_read = result;
1199 }
1200
1201 if (bytes_read == 0)
1202 DEBUG("Read timed out");
1203
1204 RETURN_INT(bytes_read);
1205 #endif
1206 }
1207
1208 SP_API enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf,
1209 size_t count)
1210 {
1211 TRACE("%p, %p, %d", port, buf, count);
1212
1213 CHECK_OPEN_PORT();
1214
1215 if (!buf)
1216 RETURN_ERROR(SP_ERR_ARG, "Null buffer");
1217
1218 DEBUG_FMT("Reading up to %d bytes from port %s", count, port->name);
1219
1220 #ifdef _WIN32
1221 DWORD bytes_read;
1222
1223 /* Set timeout. */
1224 if (port->timeouts.ReadIntervalTimeout != MAXDWORD ||
1225 port->timeouts.ReadTotalTimeoutMultiplier != 0 ||
1226 port->timeouts.ReadTotalTimeoutConstant != 0) {
1227 port->timeouts.ReadIntervalTimeout = MAXDWORD;
1228 port->timeouts.ReadTotalTimeoutMultiplier = 0;
1229 port->timeouts.ReadTotalTimeoutConstant = 0;
1230 if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
1231 RETURN_FAIL("SetCommTimeouts() failed");
1232 }
1233
1234 /* Do read. */
1235 if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
1236 RETURN_FAIL("ReadFile() failed");
1237
1238 /* Get number of bytes read. */
1239 if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
1240 RETURN_FAIL("GetOverlappedResult() failed");
1241
1242 TRY(restart_wait_if_needed(port, bytes_read));
1243
1244 RETURN_INT(bytes_read);
1245 #else
1246 ssize_t bytes_read;
1247
1248 /* Returns the number of bytes read, or -1 upon failure. */
1249 if ((bytes_read = read(port->fd, buf, count)) < 0) {
1250 if (errno == EAGAIN)
1251 /* No bytes available. */
1252 bytes_read = 0;
1253 else
1254 /* This is an actual failure. */
1255 RETURN_FAIL("read() failed");
1256 }
1257 RETURN_INT(bytes_read);
1258 #endif
1259 }
1260
1261 SP_API enum sp_return sp_input_waiting(struct sp_port *port)
1262 {
1263 TRACE("%p", port);
1264
1265 CHECK_OPEN_PORT();
1266
1267 DEBUG_FMT("Checking input bytes waiting on port %s", port->name);
1268
1269 #ifdef _WIN32
1270 DWORD errors;
1271 COMSTAT comstat;
1272
1273 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1274 RETURN_FAIL("ClearCommError() failed");
1275 RETURN_INT(comstat.cbInQue);
1276 #else
1277 int bytes_waiting;
1278 if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
1279 RETURN_FAIL("TIOCINQ ioctl failed");
1280 RETURN_INT(bytes_waiting);
1281 #endif
1282 }
1283
1284 SP_API enum sp_return sp_output_waiting(struct sp_port *port)
1285 {
1286 TRACE("%p", port);
1287
1288 CHECK_OPEN_PORT();
1289
1290 DEBUG_FMT("Checking output bytes waiting on port %s", port->name);
1291
1292 #ifdef _WIN32
1293 DWORD errors;
1294 COMSTAT comstat;
1295
1296 if (ClearCommError(port->hdl, &errors, &comstat) == 0)
1297 RETURN_FAIL("ClearCommError() failed");
1298 RETURN_INT(comstat.cbOutQue);
1299 #else
1300 int bytes_waiting;
1301 if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
1302 RETURN_FAIL("TIOCOUTQ ioctl failed");
1303 RETURN_INT(bytes_waiting);
1304 #endif
1305 }
1306
1307 SP_API enum sp_return sp_new_event_set(struct sp_event_set **result_ptr)
1308 {
1309 struct sp_event_set *result;
1310
1311 TRACE("%p", result_ptr);
1312
1313 if (!result_ptr)
1314 RETURN_ERROR(SP_ERR_ARG, "Null result");
1315
1316 *result_ptr = NULL;
1317
1318 if (!(result = malloc(sizeof(struct sp_event_set))))
1319 RETURN_ERROR(SP_ERR_MEM, "sp_event_set malloc() failed");
1320
1321 memset(result, 0, sizeof(struct sp_event_set));
1322
1323 *result_ptr = result;
1324
1325 RETURN_OK();
1326 }
1327
1328 static enum sp_return add_handle(struct sp_event_set *event_set,
1329 event_handle handle, enum sp_event mask)
1330 {
1331 void *new_handles;
1332 enum sp_event *new_masks;
1333
1334 TRACE("%p, %d, %d", event_set, handle, mask);
1335
1336 if (!(new_handles = realloc(event_set->handles,
1337 sizeof(event_handle) * (event_set->count + 1))))
1338 RETURN_ERROR(SP_ERR_MEM, "Handle array realloc() failed");
1339
1340 event_set->handles = new_handles;
1341
1342 if (!(new_masks = realloc(event_set->masks,
1343 sizeof(enum sp_event) * (event_set->count + 1))))
1344 RETURN_ERROR(SP_ERR_MEM, "Mask array realloc() failed");
1345
1346 event_set->masks = new_masks;
1347
1348 ((event_handle *) event_set->handles)[event_set->count] = handle;
1349 event_set->masks[event_set->count] = mask;
1350
1351 event_set->count++;
1352
1353 RETURN_OK();
1354 }
1355
1356 SP_API enum sp_return sp_add_port_events(struct sp_event_set *event_set,
1357 const struct sp_port *port, enum sp_event mask)
1358 {
1359 TRACE("%p, %p, %d", event_set, port, mask);
1360
1361 if (!event_set)
1362 RETURN_ERROR(SP_ERR_ARG, "Null event set");
1363
1364 if (!port)
1365 RETURN_ERROR(SP_ERR_ARG, "Null port");
1366
1367 if (mask > (SP_EVENT_RX_READY | SP_EVENT_TX_READY | SP_EVENT_ERROR))
1368 RETURN_ERROR(SP_ERR_ARG, "Invalid event mask");
1369
1370 if (!mask)
1371 RETURN_OK();
1372
1373 #ifdef _WIN32
1374 enum sp_event handle_mask;
1375 if ((handle_mask = mask & SP_EVENT_TX_READY))
1376 TRY(add_handle(event_set, port->write_ovl.hEvent, handle_mask));
1377 if ((handle_mask = mask & (SP_EVENT_RX_READY | SP_EVENT_ERROR)))
1378 TRY(add_handle(event_set, port->wait_ovl.hEvent, handle_mask));
1379 #else
1380 TRY(add_handle(event_set, port->fd, mask));
1381 #endif
1382
1383 RETURN_OK();
1384 }
1385
1386 SP_API void sp_free_event_set(struct sp_event_set *event_set)
1387 {
1388 TRACE("%p", event_set);
1389
1390 if (!event_set) {
1391 DEBUG("Null event set");
1392 RETURN();
1393 }
1394
1395 DEBUG("Freeing event set");
1396
1397 if (event_set->handles)
1398 free(event_set->handles);
1399 if (event_set->masks)
1400 free(event_set->masks);
1401
1402 free(event_set);
1403
1404 RETURN();
1405 }
1406
1407 SP_API enum sp_return sp_wait(struct sp_event_set *event_set,
1408 unsigned int timeout_ms)
1409 {
1410 TRACE("%p, %d", event_set, timeout_ms);
1411
1412 if (!event_set)
1413 RETURN_ERROR(SP_ERR_ARG, "Null event set");
1414
1415 #ifdef _WIN32
1416 if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE,
1417 timeout_ms ? timeout_ms : INFINITE) == WAIT_FAILED)
1418 RETURN_FAIL("WaitForMultipleObjects() failed");
1419
1420 RETURN_OK();
1421 #else
1422 struct timeval start, delta, now, end = {0, 0};
1423 int started = 0;
1424 int result, timeout_remaining_ms;
1425 struct pollfd *pollfds;
1426 unsigned int i;
1427
1428 if (!(pollfds = malloc(sizeof(struct pollfd) * event_set->count)))
1429 RETURN_ERROR(SP_ERR_MEM, "pollfds malloc() failed");
1430
1431 for (i = 0; i < event_set->count; i++) {
1432 pollfds[i].fd = ((int *) event_set->handles)[i];
1433 pollfds[i].events = 0;
1434 pollfds[i].revents = 0;
1435 if (event_set->masks[i] & SP_EVENT_RX_READY)
1436 pollfds[i].events |= POLLIN;
1437 if (event_set->masks[i] & SP_EVENT_TX_READY)
1438 pollfds[i].events |= POLLOUT;
1439 if (event_set->masks[i] & SP_EVENT_ERROR)
1440 pollfds[i].events |= POLLERR;
1441 }
1442
1443 if (timeout_ms) {
1444 /* Get time at start of operation. */
1445 gettimeofday(&start, NULL);
1446 /* Define duration of timeout. */
1447 delta.tv_sec = timeout_ms / 1000;
1448 delta.tv_usec = (timeout_ms % 1000) * 1000;
1449 /* Calculate time at which we should give up. */
1450 timeradd(&start, &delta, &end);
1451 }
1452
1453 /* Loop until an event occurs. */
1454 while (1) {
1455 /*
1456 * Check timeout only if we have run poll() at least once,
1457 * to avoid any issues if a short timeout is reached before
1458 * poll() is even run.
1459 */
1460 if (timeout_ms && started) {
1461 gettimeofday(&now, NULL);
1462 if (timercmp(&now, &end, >)) {
1463 DEBUG("Wait timed out");
1464 break;
1465 }
1466 timersub(&end, &now, &delta);
1467 timeout_remaining_ms = delta.tv_sec * 1000 + delta.tv_usec / 1000;
1468 }
1469
1470 result = poll(pollfds, event_set->count, timeout_ms ? timeout_remaining_ms : -1);
1471 started = 1;
1472
1473 if (result < 0) {
1474 if (errno == EINTR) {
1475 DEBUG("poll() call was interrupted, repeating");
1476 continue;
1477 } else {
1478 free(pollfds);
1479 RETURN_FAIL("poll() failed");
1480 }
1481 } else if (result == 0) {
1482 DEBUG("poll() timed out");
1483 break;
1484 } else {
1485 DEBUG("poll() completed");
1486 break;
1487 }
1488 }
1489
1490 free(pollfds);
1491 RETURN_OK();
1492 #endif
1493 }
1494
1495 #ifdef USE_TERMIOS_SPEED
1496 static enum sp_return get_baudrate(int fd, int *baudrate)
1497 {
1498 void *data;
1499
1500 TRACE("%d, %p", fd, baudrate);
1501
1502 DEBUG("Getting baud rate");
1503
1504 if (!(data = malloc(get_termios_size())))
1505 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1506
1507 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1508 free(data);
1509 RETURN_FAIL("Getting termios failed");
1510 }
1511
1512 *baudrate = get_termios_speed(data);
1513
1514 free(data);
1515
1516 RETURN_OK();
1517 }
1518
1519 static enum sp_return set_baudrate(int fd, int baudrate)
1520 {
1521 void *data;
1522
1523 TRACE("%d, %d", fd, baudrate);
1524
1525 DEBUG("Getting baud rate");
1526
1527 if (!(data = malloc(get_termios_size())))
1528 RETURN_ERROR(SP_ERR_MEM, "termios malloc failed");
1529
1530 if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
1531 free(data);
1532 RETURN_FAIL("Getting termios failed");
1533 }
1534
1535 DEBUG("Setting baud rate");
1536
1537 set_termios_speed(data, baudrate);
1538
1539 if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
1540 free(data);
1541 RETURN_FAIL("Setting termios failed");
1542 }
1543
1544 free(data);
1545
1546 RETURN_OK();
1547 }
1548 #endif /* USE_TERMIOS_SPEED */
1549
1550 #ifdef USE_TERMIOX
1551 static enum sp_return get_flow(int fd, struct port_data *data)
1552 {
1553 void *termx;
1554
1555 TRACE("%d, %p", fd, data);
1556
1557 DEBUG("Getting advanced flow control");
1558
1559 if (!(termx = malloc(get_termiox_size())))
1560 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1561
1562 if (ioctl(fd, TCGETX, termx) < 0) {
1563 free(termx);
1564 RETURN_FAIL("Getting termiox failed");
1565 }
1566
1567 get_termiox_flow(termx, &data->rts_flow, &data->cts_flow,
1568 &data->dtr_flow, &data->dsr_flow);
1569
1570 free(termx);
1571
1572 RETURN_OK();
1573 }
1574
1575 static enum sp_return set_flow(int fd, struct port_data *data)
1576 {
1577 void *termx;
1578
1579 TRACE("%d, %p", fd, data);
1580
1581 DEBUG("Getting advanced flow control");
1582
1583 if (!(termx = malloc(get_termiox_size())))
1584 RETURN_ERROR(SP_ERR_MEM, "termiox malloc failed");
1585
1586 if (ioctl(fd, TCGETX, termx) < 0) {
1587 free(termx);
1588 RETURN_FAIL("Getting termiox failed");
1589 }
1590
1591 DEBUG("Setting advanced flow control");
1592
1593 set_termiox_flow(termx, data->rts_flow, data->cts_flow,
1594 data->dtr_flow, data->dsr_flow);
1595
1596 if (ioctl(fd, TCSETX, termx) < 0) {
1597 free(termx);
1598 RETURN_FAIL("Setting termiox failed");
1599 }
1600
1601 free(termx);
1602
1603 RETURN_OK();
1604 }
1605 #endif /* USE_TERMIOX */
1606
1607 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
1608 struct sp_port_config *config)
1609 {
1610 unsigned int i;
1611
1612 TRACE("%p, %p, %p", port, data, config);
1613
1614 DEBUG_FMT("Getting configuration for port %s", port->name);
1615
1616 #ifdef _WIN32
1617 if (!GetCommState(port->hdl, &data->dcb))
1618 RETURN_FAIL("GetCommState() failed");
1619
1620 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1621 if (data->dcb.BaudRate == std_baudrates[i].index) {
1622 config->baudrate = std_baudrates[i].value;
1623 break;
1624 }
1625 }
1626
1627 if (i == NUM_STD_BAUDRATES)
1628 /* BaudRate field can be either an index or a custom baud rate. */
1629 config->baudrate = data->dcb.BaudRate;
1630
1631 config->bits = data->dcb.ByteSize;
1632
1633 if (data->dcb.fParity)
1634 switch (data->dcb.Parity) {
1635 case NOPARITY:
1636 config->parity = SP_PARITY_NONE;
1637 break;
1638 case ODDPARITY:
1639 config->parity = SP_PARITY_ODD;
1640 break;
1641 case EVENPARITY:
1642 config->parity = SP_PARITY_EVEN;
1643 break;
1644 case MARKPARITY:
1645 config->parity = SP_PARITY_MARK;
1646 break;
1647 case SPACEPARITY:
1648 config->parity = SP_PARITY_SPACE;
1649 break;
1650 default:
1651 config->parity = -1;
1652 }
1653 else
1654 config->parity = SP_PARITY_NONE;
1655
1656 switch (data->dcb.StopBits) {
1657 case ONESTOPBIT:
1658 config->stopbits = 1;
1659 break;
1660 case TWOSTOPBITS:
1661 config->stopbits = 2;
1662 break;
1663 default:
1664 config->stopbits = -1;
1665 }
1666
1667 switch (data->dcb.fRtsControl) {
1668 case RTS_CONTROL_DISABLE:
1669 config->rts = SP_RTS_OFF;
1670 break;
1671 case RTS_CONTROL_ENABLE:
1672 config->rts = SP_RTS_ON;
1673 break;
1674 case RTS_CONTROL_HANDSHAKE:
1675 config->rts = SP_RTS_FLOW_CONTROL;
1676 break;
1677 default:
1678 config->rts = -1;
1679 }
1680
1681 config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1682
1683 switch (data->dcb.fDtrControl) {
1684 case DTR_CONTROL_DISABLE:
1685 config->dtr = SP_DTR_OFF;
1686 break;
1687 case DTR_CONTROL_ENABLE:
1688 config->dtr = SP_DTR_ON;
1689 break;
1690 case DTR_CONTROL_HANDSHAKE:
1691 config->dtr = SP_DTR_FLOW_CONTROL;
1692 break;
1693 default:
1694 config->dtr = -1;
1695 }
1696
1697 config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1698
1699 if (data->dcb.fInX) {
1700 if (data->dcb.fOutX)
1701 config->xon_xoff = SP_XONXOFF_INOUT;
1702 else
1703 config->xon_xoff = SP_XONXOFF_IN;
1704 } else {
1705 if (data->dcb.fOutX)
1706 config->xon_xoff = SP_XONXOFF_OUT;
1707 else
1708 config->xon_xoff = SP_XONXOFF_DISABLED;
1709 }
1710
1711 #else // !_WIN32
1712
1713 if (tcgetattr(port->fd, &data->term) < 0)
1714 RETURN_FAIL("tcgetattr() failed");
1715
1716 if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
1717 RETURN_FAIL("TIOCMGET ioctl failed");
1718
1719 #ifdef USE_TERMIOX
1720 int ret = get_flow(port->fd, data);
1721
1722 if (ret == SP_ERR_FAIL && errno == EINVAL)
1723 data->termiox_supported = 0;
1724 else if (ret < 0)
1725 RETURN_CODEVAL(ret);
1726 else
1727 data->termiox_supported = 1;
1728 #else
1729 data->termiox_supported = 0;
1730 #endif
1731
1732 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1733 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
1734 config->baudrate = std_baudrates[i].value;
1735 break;
1736 }
1737 }
1738
1739 if (i == NUM_STD_BAUDRATES) {
1740 #ifdef __APPLE__
1741 config->baudrate = (int)data->term.c_ispeed;
1742 #elif defined(USE_TERMIOS_SPEED)
1743 TRY(get_baudrate(port->fd, &config->baudrate));
1744 #else
1745 config->baudrate = -1;
1746 #endif
1747 }
1748
1749 switch (data->term.c_cflag & CSIZE) {
1750 case CS8:
1751 config->bits = 8;
1752 break;
1753 case CS7:
1754 config->bits = 7;
1755 break;
1756 case CS6:
1757 config->bits = 6;
1758 break;
1759 case CS5:
1760 config->bits = 5;
1761 break;
1762 default:
1763 config->bits = -1;
1764 }
1765
1766 if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
1767 config->parity = SP_PARITY_NONE;
1768 else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
1769 config->parity = -1;
1770 #ifdef CMSPAR
1771 else if (data->term.c_cflag & CMSPAR)
1772 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
1773 #endif
1774 else
1775 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
1776
1777 config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
1778
1779 if (data->term.c_cflag & CRTSCTS) {
1780 config->rts = SP_RTS_FLOW_CONTROL;
1781 config->cts = SP_CTS_FLOW_CONTROL;
1782 } else {
1783 if (data->termiox_supported && data->rts_flow)
1784 config->rts = SP_RTS_FLOW_CONTROL;
1785 else
1786 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
1787
1788 config->cts = (data->termiox_supported && data->cts_flow) ?
1789 SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
1790 }
1791
1792 if (data->termiox_supported && data->dtr_flow)
1793 config->dtr = SP_DTR_FLOW_CONTROL;
1794 else
1795 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
1796
1797 config->dsr = (data->termiox_supported && data->dsr_flow) ?
1798 SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
1799
1800 if (data->term.c_iflag & IXOFF) {
1801 if (data->term.c_iflag & IXON)
1802 config->xon_xoff = SP_XONXOFF_INOUT;
1803 else
1804 config->xon_xoff = SP_XONXOFF_IN;
1805 } else {
1806 if (data->term.c_iflag & IXON)
1807 config->xon_xoff = SP_XONXOFF_OUT;
1808 else
1809 config->xon_xoff = SP_XONXOFF_DISABLED;
1810 }
1811 #endif
1812
1813 RETURN_OK();
1814 }
1815
1816 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
1817 const struct sp_port_config *config)
1818 {
1819 unsigned int i;
1820 #ifdef __APPLE__
1821 BAUD_TYPE baud_nonstd;
1822
1823 baud_nonstd = B0;
1824 #endif
1825 #ifdef USE_TERMIOS_SPEED
1826 int baud_nonstd = 0;
1827 #endif
1828
1829 TRACE("%p, %p, %p", port, data, config);
1830
1831 DEBUG_FMT("Setting configuration for port %s", port->name);
1832
1833 #ifdef _WIN32
1834 if (config->baudrate >= 0) {
1835 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1836 if (config->baudrate == std_baudrates[i].value) {
1837 data->dcb.BaudRate = std_baudrates[i].index;
1838 break;
1839 }
1840 }
1841
1842 if (i == NUM_STD_BAUDRATES)
1843 data->dcb.BaudRate = config->baudrate;
1844 }
1845
1846 if (config->bits >= 0)
1847 data->dcb.ByteSize = config->bits;
1848
1849 if (config->parity >= 0) {
1850 switch (config->parity) {
1851 case SP_PARITY_NONE:
1852 data->dcb.Parity = NOPARITY;
1853 break;
1854 case SP_PARITY_ODD:
1855 data->dcb.Parity = ODDPARITY;
1856 break;
1857 case SP_PARITY_EVEN:
1858 data->dcb.Parity = EVENPARITY;
1859 break;
1860 case SP_PARITY_MARK:
1861 data->dcb.Parity = MARKPARITY;
1862 break;
1863 case SP_PARITY_SPACE:
1864 data->dcb.Parity = SPACEPARITY;
1865 break;
1866 default:
1867 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
1868 }
1869 }
1870
1871 if (config->stopbits >= 0) {
1872 switch (config->stopbits) {
1873 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
1874 case 1:
1875 data->dcb.StopBits = ONESTOPBIT;
1876 break;
1877 case 2:
1878 data->dcb.StopBits = TWOSTOPBITS;
1879 break;
1880 default:
1881 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bit setting");
1882 }
1883 }
1884
1885 if (config->rts >= 0) {
1886 switch (config->rts) {
1887 case SP_RTS_OFF:
1888 data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
1889 break;
1890 case SP_RTS_ON:
1891 data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
1892 break;
1893 case SP_RTS_FLOW_CONTROL:
1894 data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
1895 break;
1896 default:
1897 RETURN_ERROR(SP_ERR_ARG, "Invalid RTS setting");
1898 }
1899 }
1900
1901 if (config->cts >= 0) {
1902 switch (config->cts) {
1903 case SP_CTS_IGNORE:
1904 data->dcb.fOutxCtsFlow = FALSE;
1905 break;
1906 case SP_CTS_FLOW_CONTROL:
1907 data->dcb.fOutxCtsFlow = TRUE;
1908 break;
1909 default:
1910 RETURN_ERROR(SP_ERR_ARG, "Invalid CTS setting");
1911 }
1912 }
1913
1914 if (config->dtr >= 0) {
1915 switch (config->dtr) {
1916 case SP_DTR_OFF:
1917 data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
1918 break;
1919 case SP_DTR_ON:
1920 data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
1921 break;
1922 case SP_DTR_FLOW_CONTROL:
1923 data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
1924 break;
1925 default:
1926 RETURN_ERROR(SP_ERR_ARG, "Invalid DTR setting");
1927 }
1928 }
1929
1930 if (config->dsr >= 0) {
1931 switch (config->dsr) {
1932 case SP_DSR_IGNORE:
1933 data->dcb.fOutxDsrFlow = FALSE;
1934 break;
1935 case SP_DSR_FLOW_CONTROL:
1936 data->dcb.fOutxDsrFlow = TRUE;
1937 break;
1938 default:
1939 RETURN_ERROR(SP_ERR_ARG, "Invalid DSR setting");
1940 }
1941 }
1942
1943 if (config->xon_xoff >= 0) {
1944 switch (config->xon_xoff) {
1945 case SP_XONXOFF_DISABLED:
1946 data->dcb.fInX = FALSE;
1947 data->dcb.fOutX = FALSE;
1948 break;
1949 case SP_XONXOFF_IN:
1950 data->dcb.fInX = TRUE;
1951 data->dcb.fOutX = FALSE;
1952 break;
1953 case SP_XONXOFF_OUT:
1954 data->dcb.fInX = FALSE;
1955 data->dcb.fOutX = TRUE;
1956 break;
1957 case SP_XONXOFF_INOUT:
1958 data->dcb.fInX = TRUE;
1959 data->dcb.fOutX = TRUE;
1960 break;
1961 default:
1962 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
1963 }
1964 }
1965
1966 if (!SetCommState(port->hdl, &data->dcb))
1967 RETURN_FAIL("SetCommState() failed");
1968
1969 #else /* !_WIN32 */
1970
1971 int controlbits;
1972
1973 if (config->baudrate >= 0) {
1974 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1975 if (config->baudrate == std_baudrates[i].value) {
1976 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
1977 RETURN_FAIL("cfsetospeed() failed");
1978
1979 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
1980 RETURN_FAIL("cfsetispeed() failed");
1981 break;
1982 }
1983 }
1984
1985 /* Non-standard baud rate */
1986 if (i == NUM_STD_BAUDRATES) {
1987 #ifdef __APPLE__
1988 /* Set "dummy" baud rate. */
1989 if (cfsetspeed(&data->term, B9600) < 0)
1990 RETURN_FAIL("cfsetspeed() failed");
1991 baud_nonstd = config->baudrate;
1992 #elif defined(USE_TERMIOS_SPEED)
1993 baud_nonstd = 1;
1994 #else
1995 RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
1996 #endif
1997 }
1998 }
1999
2000 if (config->bits >= 0) {
2001 data->term.c_cflag &= ~CSIZE;
2002 switch (config->bits) {
2003 case 8:
2004 data->term.c_cflag |= CS8;
2005 break;
2006 case 7:
2007 data->term.c_cflag |= CS7;
2008 break;
2009 case 6:
2010 data->term.c_cflag |= CS6;
2011 break;
2012 case 5:
2013 data->term.c_cflag |= CS5;
2014 break;
2015 default:
2016 RETURN_ERROR(SP_ERR_ARG, "Invalid data bits setting");
2017 }
2018 }
2019
2020 if (config->parity >= 0) {
2021 data->term.c_iflag &= ~IGNPAR;
2022 data->term.c_cflag &= ~(PARENB | PARODD);
2023 #ifdef CMSPAR
2024 data->term.c_cflag &= ~CMSPAR;
2025 #endif
2026 switch (config->parity) {
2027 case SP_PARITY_NONE:
2028 data->term.c_iflag |= IGNPAR;
2029 break;
2030 case SP_PARITY_EVEN:
2031 data->term.c_cflag |= PARENB;
2032 break;
2033 case SP_PARITY_ODD:
2034 data->term.c_cflag |= PARENB | PARODD;
2035 break;
2036 #ifdef CMSPAR
2037 case SP_PARITY_MARK:
2038 data->term.c_cflag |= PARENB | PARODD;
2039 data->term.c_cflag |= CMSPAR;
2040 break;
2041 case SP_PARITY_SPACE:
2042 data->term.c_cflag |= PARENB;
2043 data->term.c_cflag |= CMSPAR;
2044 break;
2045 #else
2046 case SP_PARITY_MARK:
2047 case SP_PARITY_SPACE:
2048 RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
2049 #endif
2050 default:
2051 RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
2052 }
2053 }
2054
2055 if (config->stopbits >= 0) {
2056 data->term.c_cflag &= ~CSTOPB;
2057 switch (config->stopbits) {
2058 case 1:
2059 data->term.c_cflag &= ~CSTOPB;
2060 break;
2061 case 2:
2062 data->term.c_cflag |= CSTOPB;
2063 break;
2064 default:
2065 RETURN_ERROR(SP_ERR_ARG, "Invalid stop bits setting");
2066 }
2067 }
2068
2069 if (config->rts >= 0 || config->cts >= 0) {
2070 if (data->termiox_supported) {
2071 data->rts_flow = data->cts_flow = 0;
2072 switch (config->rts) {
2073 case SP_RTS_OFF:
2074 case SP_RTS_ON:
2075 controlbits = TIOCM_RTS;
2076 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
2077 RETURN_FAIL("Setting RTS signal level failed");
2078 break;
2079 case SP_RTS_FLOW_CONTROL:
2080 data->rts_flow = 1;
2081 break;
2082 default:
2083 break;
2084 }
2085 if (config->cts == SP_CTS_FLOW_CONTROL)
2086 data->cts_flow = 1;
2087
2088 if (data->rts_flow && data->cts_flow)
2089 data->term.c_iflag |= CRTSCTS;
2090 else
2091 data->term.c_iflag &= ~CRTSCTS;
2092 } else {
2093 /* Asymmetric use of RTS/CTS not supported. */
2094 if (data->term.c_iflag & CRTSCTS) {
2095 /* Flow control can only be disabled for both RTS & CTS together. */
2096 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
2097 if (config->cts != SP_CTS_IGNORE)
2098 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
2099 }
2100 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
2101 if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
2102 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be disabled together");
2103 }
2104 } else {
2105 /* Flow control can only be enabled for both RTS & CTS together. */
2106 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
2107 ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
2108 RETURN_ERROR(SP_ERR_SUPP, "RTS & CTS flow control must be enabled together");
2109 }
2110
2111 if (config->rts >= 0) {
2112 if (config->rts == SP_RTS_FLOW_CONTROL) {
2113 data->term.c_iflag |= CRTSCTS;
2114 } else {
2115 controlbits = TIOCM_RTS;
2116 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
2117 &controlbits) < 0)
2118 RETURN_FAIL("Setting RTS signal level failed");
2119 }
2120 }
2121 }
2122 }
2123
2124 if (config->dtr >= 0 || config->dsr >= 0) {
2125 if (data->termiox_supported) {
2126 data->dtr_flow = data->dsr_flow = 0;
2127 switch (config->dtr) {
2128 case SP_DTR_OFF:
2129 case SP_DTR_ON:
2130 controlbits = TIOCM_DTR;
2131 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
2132 RETURN_FAIL("Setting DTR signal level failed");
2133 break;
2134 case SP_DTR_FLOW_CONTROL:
2135 data->dtr_flow = 1;
2136 break;
2137 default:
2138 break;
2139 }
2140 if (config->dsr == SP_DSR_FLOW_CONTROL)
2141 data->dsr_flow = 1;
2142 } else {
2143 /* DTR/DSR flow control not supported. */
2144 if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
2145 RETURN_ERROR(SP_ERR_SUPP, "DTR/DSR flow control not supported");
2146
2147 if (config->dtr >= 0) {
2148 controlbits = TIOCM_DTR;
2149 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
2150 &controlbits) < 0)
2151 RETURN_FAIL("Setting DTR signal level failed");
2152 }
2153 }
2154 }
2155
2156 if (config->xon_xoff >= 0) {
2157 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
2158 switch (config->xon_xoff) {
2159 case SP_XONXOFF_DISABLED:
2160 break;
2161 case SP_XONXOFF_IN:
2162 data->term.c_iflag |= IXOFF;
2163 break;
2164 case SP_XONXOFF_OUT:
2165 data->term.c_iflag |= IXON | IXANY;
2166 break;
2167 case SP_XONXOFF_INOUT:
2168 data->term.c_iflag |= IXON | IXOFF | IXANY;
2169 break;
2170 default:
2171 RETURN_ERROR(SP_ERR_ARG, "Invalid XON/XOFF setting");
2172 }
2173 }
2174
2175 if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
2176 RETURN_FAIL("tcsetattr() failed");
2177
2178 #ifdef __APPLE__
2179 if (baud_nonstd != B0) {
2180 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
2181 RETURN_FAIL("IOSSIOSPEED ioctl failed");
2182 /*
2183 * Set baud rates in data->term to correct, but incompatible
2184 * with tcsetattr() value, same as delivered by tcgetattr().
2185 */
2186 if (cfsetspeed(&data->term, baud_nonstd) < 0)
2187 RETURN_FAIL("cfsetspeed() failed");
2188 }
2189 #elif defined(__linux__)
2190 #ifdef USE_TERMIOS_SPEED
2191 if (baud_nonstd)
2192 TRY(set_baudrate(port->fd, config->baudrate));
2193 #endif
2194 #ifdef USE_TERMIOX
2195 if (data->termiox_supported)
2196 TRY(set_flow(port->fd, data));
2197 #endif
2198 #endif
2199
2200 #endif /* !_WIN32 */
2201
2202 RETURN_OK();
2203 }
2204
2205 SP_API enum sp_return sp_new_config(struct sp_port_config **config_ptr)
2206 {
2207 struct sp_port_config *config;
2208
2209 TRACE("%p", config_ptr);
2210
2211 if (!config_ptr)
2212 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2213
2214 *config_ptr = NULL;
2215
2216 if (!(config = malloc(sizeof(struct sp_port_config))))
2217 RETURN_ERROR(SP_ERR_MEM, "Config malloc failed");
2218
2219 config->baudrate = -1;
2220 config->bits = -1;
2221 config->parity = -1;
2222 config->stopbits = -1;
2223 config->rts = -1;
2224 config->cts = -1;
2225 config->dtr = -1;
2226 config->dsr = -1;
2227
2228 *config_ptr = config;
2229
2230 RETURN_OK();
2231 }
2232
2233 SP_API void sp_free_config(struct sp_port_config *config)
2234 {
2235 TRACE("%p", config);
2236
2237 if (!config)
2238 DEBUG("Null config");
2239 else
2240 free(config);
2241
2242 RETURN();
2243 }
2244
2245 SP_API enum sp_return sp_get_config(struct sp_port *port,
2246 struct sp_port_config *config)
2247 {
2248 struct port_data data;
2249
2250 TRACE("%p, %p", port, config);
2251
2252 CHECK_OPEN_PORT();
2253
2254 if (!config)
2255 RETURN_ERROR(SP_ERR_ARG, "Null config");
2256
2257 TRY(get_config(port, &data, config));
2258
2259 RETURN_OK();
2260 }
2261
2262 SP_API enum sp_return sp_set_config(struct sp_port *port,
2263 const struct sp_port_config *config)
2264 {
2265 struct port_data data;
2266 struct sp_port_config prev_config;
2267
2268 TRACE("%p, %p", port, config);
2269
2270 CHECK_OPEN_PORT();
2271
2272 if (!config)
2273 RETURN_ERROR(SP_ERR_ARG, "Null config");
2274
2275 TRY(get_config(port, &data, &prev_config));
2276 TRY(set_config(port, &data, config));
2277
2278 RETURN_OK();
2279 }
2280
2281 #define CREATE_ACCESSORS(x, type) \
2282 SP_API enum sp_return sp_set_##x(struct sp_port *port, type x) { \
2283 struct port_data data; \
2284 struct sp_port_config config; \
2285 TRACE("%p, %d", port, x); \
2286 CHECK_OPEN_PORT(); \
2287 TRY(get_config(port, &data, &config)); \
2288 config.x = x; \
2289 TRY(set_config(port, &data, &config)); \
2290 RETURN_OK(); \
2291 } \
2292 SP_API enum sp_return sp_get_config_##x(const struct sp_port_config *config, \
2293 type *x) { \
2294 TRACE("%p, %p", config, x); \
2295 if (!x) \
2296 RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); \
2297 if (!config) \
2298 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2299 *x = config->x; \
2300 RETURN_OK(); \
2301 } \
2302 SP_API enum sp_return sp_set_config_##x(struct sp_port_config *config, \
2303 type x) { \
2304 TRACE("%p, %d", config, x); \
2305 if (!config) \
2306 RETURN_ERROR(SP_ERR_ARG, "Null config"); \
2307 config->x = x; \
2308 RETURN_OK(); \
2309 }
2310
2311 CREATE_ACCESSORS(baudrate, int)
2312 CREATE_ACCESSORS(bits, int)
2313 CREATE_ACCESSORS(parity, enum sp_parity)
2314 CREATE_ACCESSORS(stopbits, int)
2315 CREATE_ACCESSORS(rts, enum sp_rts)
2316 CREATE_ACCESSORS(cts, enum sp_cts)
2317 CREATE_ACCESSORS(dtr, enum sp_dtr)
2318 CREATE_ACCESSORS(dsr, enum sp_dsr)
2319 CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)
2320
2321 SP_API enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config,
2322 enum sp_flowcontrol flowcontrol)
2323 {
2324 if (!config)
2325 RETURN_ERROR(SP_ERR_ARG, "Null configuration");
2326
2327 if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
2328 RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");
2329
2330 if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
2331 config->xon_xoff = SP_XONXOFF_INOUT;
2332 else
2333 config->xon_xoff = SP_XONXOFF_DISABLED;
2334
2335 if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
2336 config->rts = SP_RTS_FLOW_CONTROL;
2337 config->cts = SP_CTS_FLOW_CONTROL;
2338 } else {
2339 if (config->rts == SP_RTS_FLOW_CONTROL)
2340 config->rts = SP_RTS_ON;
2341 config->cts = SP_CTS_IGNORE;
2342 }
2343
2344 if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
2345 config->dtr = SP_DTR_FLOW_CONTROL;
2346 config->dsr = SP_DSR_FLOW_CONTROL;
2347 } else {
2348 if (config->dtr == SP_DTR_FLOW_CONTROL)
2349 config->dtr = SP_DTR_ON;
2350 config->dsr = SP_DSR_IGNORE;
2351 }
2352
2353 RETURN_OK();
2354 }
2355
2356 SP_API enum sp_return sp_set_flowcontrol(struct sp_port *port,
2357 enum sp_flowcontrol flowcontrol)
2358 {
2359 struct port_data data;
2360 struct sp_port_config config;
2361
2362 TRACE("%p, %d", port, flowcontrol);
2363
2364 CHECK_OPEN_PORT();
2365
2366 TRY(get_config(port, &data, &config));
2367
2368 TRY(sp_set_config_flowcontrol(&config, flowcontrol));
2369
2370 TRY(set_config(port, &data, &config));
2371
2372 RETURN_OK();
2373 }
2374
2375 SP_API enum sp_return sp_get_signals(struct sp_port *port,
2376 enum sp_signal *signals)
2377 {
2378 TRACE("%p, %p", port, signals);
2379
2380 CHECK_OPEN_PORT();
2381
2382 if (!signals)
2383 RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
2384
2385 DEBUG_FMT("Getting control signals for port %s", port->name);
2386
2387 *signals = 0;
2388 #ifdef _WIN32
2389 DWORD bits;
2390 if (GetCommModemStatus(port->hdl, &bits) == 0)
2391 RETURN_FAIL("GetCommModemStatus() failed");
2392 if (bits & MS_CTS_ON)
2393 *signals |= SP_SIG_CTS;
2394 if (bits & MS_DSR_ON)
2395 *signals |= SP_SIG_DSR;
2396 if (bits & MS_RLSD_ON)
2397 *signals |= SP_SIG_DCD;
2398 if (bits & MS_RING_ON)
2399 *signals |= SP_SIG_RI;
2400 #else
2401 int bits;
2402 if (ioctl(port->fd, TIOCMGET, &bits) < 0)
2403 RETURN_FAIL("TIOCMGET ioctl failed");
2404 if (bits & TIOCM_CTS)
2405 *signals |= SP_SIG_CTS;
2406 if (bits & TIOCM_DSR)
2407 *signals |= SP_SIG_DSR;
2408 if (bits & TIOCM_CAR)
2409 *signals |= SP_SIG_DCD;
2410 if (bits & TIOCM_RNG)
2411 *signals |= SP_SIG_RI;
2412 #endif
2413 RETURN_OK();
2414 }
2415
2416 SP_API enum sp_return sp_start_break(struct sp_port *port)
2417 {
2418 TRACE("%p", port);
2419
2420 CHECK_OPEN_PORT();
2421 #ifdef _WIN32
2422 if (SetCommBreak(port->hdl) == 0)
2423 RETURN_FAIL("SetCommBreak() failed");
2424 #else
2425 if (ioctl(port->fd, TIOCSBRK, 1) < 0)
2426 RETURN_FAIL("TIOCSBRK ioctl failed");
2427 #endif
2428
2429 RETURN_OK();
2430 }
2431
2432 SP_API enum sp_return sp_end_break(struct sp_port *port)
2433 {
2434 TRACE("%p", port);
2435
2436 CHECK_OPEN_PORT();
2437 #ifdef _WIN32
2438 if (ClearCommBreak(port->hdl) == 0)
2439 RETURN_FAIL("ClearCommBreak() failed");
2440 #else
2441 if (ioctl(port->fd, TIOCCBRK, 1) < 0)
2442 RETURN_FAIL("TIOCCBRK ioctl failed");
2443 #endif
2444
2445 RETURN_OK();
2446 }
2447
2448 SP_API int sp_last_error_code(void)
2449 {
2450 TRACE_VOID();
2451 #ifdef _WIN32
2452 RETURN_INT(GetLastError());
2453 #else
2454 RETURN_INT(errno);
2455 #endif
2456 }
2457
2458 SP_API char *sp_last_error_message(void)
2459 {
2460 TRACE_VOID();
2461
2462 #ifdef _WIN32
2463 TCHAR *message;
2464 DWORD error = GetLastError();
2465
2466 DWORD length = FormatMessage(
2467 FORMAT_MESSAGE_ALLOCATE_BUFFER |
2468 FORMAT_MESSAGE_FROM_SYSTEM |
2469 FORMAT_MESSAGE_IGNORE_INSERTS,
2470 NULL,
2471 error,
2472 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
2473 (LPTSTR) &message,
2474 0, NULL );
2475
2476 if (length >= 2 && message[length - 2] == '\r')
2477 message[length - 2] = '\0';
2478
2479 RETURN_STRING(message);
2480 #else
2481 RETURN_STRING(strerror(errno));
2482 #endif
2483 }
2484
2485 SP_API void sp_free_error_message(char *message)
2486 {
2487 TRACE("%s", message);
2488
2489 #ifdef _WIN32
2490 LocalFree(message);
2491 #else
2492 (void)message;
2493 #endif
2494
2495 RETURN();
2496 }
2497
2498 SP_API void sp_set_debug_handler(void (*handler)(const char *format, ...))
2499 {
2500 TRACE("%p", handler);
2501
2502 sp_debug_handler = handler;
2503
2504 RETURN();
2505 }
2506
2507 SP_API void sp_default_debug_handler(const char *format, ...)
2508 {
2509 va_list args;
2510 va_start(args, format);
2511 if (getenv("LIBSERIALPORT_DEBUG")) {
2512 fputs("sp: ", stderr);
2513 vfprintf(stderr, format, args);
2514 }
2515 va_end(args);
2516 }
2517
2518 SP_API int sp_get_major_package_version(void)
2519 {
2520 return SP_PACKAGE_VERSION_MAJOR;
2521 }
2522
2523 SP_API int sp_get_minor_package_version(void)
2524 {
2525 return SP_PACKAGE_VERSION_MINOR;
2526 }
2527
2528 SP_API int sp_get_micro_package_version(void)
2529 {
2530 return SP_PACKAGE_VERSION_MICRO;
2531 }
2532
2533 SP_API const char *sp_get_package_version_string(void)
2534 {
2535 return SP_PACKAGE_VERSION_STRING;
2536 }
2537
2538 SP_API int sp_get_current_lib_version(void)
2539 {
2540 return SP_LIB_VERSION_CURRENT;
2541 }
2542
2543 SP_API int sp_get_revision_lib_version(void)
2544 {
2545 return SP_LIB_VERSION_REVISION;
2546 }
2547
2548 SP_API int sp_get_age_lib_version(void)
2549 {
2550 return SP_LIB_VERSION_AGE;
2551 }
2552
2553 SP_API const char *sp_get_lib_version_string(void)
2554 {
2555 return SP_LIB_VERSION_STRING;
2556 }
2557
2558 /** @} */
gsi's contribution to libserialport