static enum sp_return set_config(struct sp_port *port, struct port_data *data,
const struct sp_port_config *config);
+#ifndef _WIN32
+
+/* Timing abstraction */
+
+struct time {
+ struct timeval tv;
+};
+
+#define TIME_ZERO {.tv = {0, 0}}
+#define TIME_MS(ms) {.tv = {ms / 1000, (ms % 1000) * 1000}}
+
+static void time_get(struct time *time)
+{
+#ifdef HAVE_CLOCK_GETTIME
+ struct timespec ts;
+ if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1)
+ clock_gettime(CLOCK_REALTIME, &ts);
+ time->tv.tv_sec = ts.tv_sec;
+ time->tv.tv_usec = ts.tv_nsec / 1000;
+#elif defined(__APPLE__)
+ mach_timebase_info_data_t info;
+ mach_timebase_info(&info);
+ uint64_t ticks = mach_absolute_time();
+ uint64_t ns = (ticks * info.numer) / info.denom;
+ time->tv.tv_sec = ns / 1000000000;
+ time->tv.tv_usec = (ns % 1000000000) / 1000;
+#else
+ gettimeofday(&time->tv, NULL);
+#endif
+}
+
+static void time_set_ms(struct time *time, unsigned int ms)
+{
+ time->tv.tv_sec = ms / 1000;
+ time->tv.tv_usec = (ms % 1000) * 1000;
+}
+
+static void time_add(const struct time *a,
+ const struct time *b, struct time *result)
+{
+ timeradd(&a->tv, &b->tv, &result->tv);
+}
+
+static void time_sub(const struct time *a,
+ const struct time *b, struct time *result)
+{
+ timersub(&a->tv, &b->tv, &result->tv);
+}
+
+static bool time_greater(const struct time *a, const struct time *b)
+{
+ return timercmp(&a->tv, &b->tv, >);
+}
+
+static void time_as_timeval(const struct time *time, struct timeval *tv)
+{
+ *tv = time->tv;
+}
+
+static unsigned int time_as_ms(const struct time *time)
+{
+ return time->tv.tv_sec * 1000 + time->tv.tv_usec / 1000;
+}
+
+#endif
+
SP_API enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
{
struct sp_port *port;
RETURN_CODEVAL(ret);
}
#else
- int flags_local = O_NONBLOCK | O_NOCTTY;
+ int flags_local = O_NONBLOCK | O_NOCTTY | O_CLOEXEC;
/* Map 'flags' to the OS-specific settings. */
if ((flags & SP_MODE_READ_WRITE) == SP_MODE_READ_WRITE)
#else
int result;
while (1) {
-#ifdef __ANDROID__
+#if defined(__ANDROID__) && (__ANDROID_API__ < 21)
+ /* Android only has tcdrain from platform 21 onwards.
+ * On previous API versions, use the ioctl directly. */
int arg = 1;
result = ioctl(port->fd, TCSBRK, &arg);
#else
RETURN_FAIL("SetCommTimeouts() failed");
}
+ /* Reduce count if it exceeds the WriteFile limit. */
+ if (count > WRITEFILE_MAX_SIZE)
+ count = WRITEFILE_MAX_SIZE;
+
/* Start write. */
if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl)) {
DEBUG("Write completed immediately");
#else
size_t bytes_written = 0;
unsigned char *ptr = (unsigned char *) buf;
- struct timeval start, delta, now, end = {0, 0};
+ struct time start, delta, now, end = TIME_ZERO;
int started = 0;
fd_set fds;
int result;
if (timeout_ms) {
/* Get time at start of operation. */
- gettimeofday(&start, NULL);
+ time_get(&start);
/* Define duration of timeout. */
- delta.tv_sec = timeout_ms / 1000;
- delta.tv_usec = (timeout_ms % 1000) * 1000;
+ time_set_ms(&delta, timeout_ms);
/* Calculate time at which we should give up. */
- timeradd(&start, &delta, &end);
+ time_add(&start, &delta, &end);
}
FD_ZERO(&fds);
* to avoid any issues if a short timeout is reached before
* select() is even run.
*/
+ struct timeval tv;
if (timeout_ms && started) {
- gettimeofday(&now, NULL);
- if (timercmp(&now, &end, >))
+ time_get(&now);
+ if (time_greater(&now, &end))
/* Timeout has expired. */
break;
- timersub(&end, &now, &delta);
+ time_sub(&end, &now, &delta);
+ time_as_timeval(&delta, &tv);
}
- result = select(port->fd + 1, NULL, &fds, NULL, timeout_ms ? &delta : NULL);
+ result = select(port->fd + 1, NULL, &fds, NULL, timeout_ms ? &tv : NULL);
started = 1;
if (result < 0) {
if (errno == EINTR) {
RETURN_FAIL("SetCommTimeouts() failed");
}
+ /* Reduce count if it exceeds the WriteFile limit. */
+ if (count > WRITEFILE_MAX_SIZE)
+ count = WRITEFILE_MAX_SIZE;
+
/* Copy data to our write buffer. */
buf_bytes = min(port->write_buf_size, count);
memcpy(port->write_buf, buf, buf_bytes);
#else
size_t bytes_read = 0;
- unsigned char *ptr = (unsigned char *)buf;
- struct timeval start, delta, now, end = {0, 0};
+ unsigned char *ptr = (unsigned char *) buf;
+ struct time start, delta, now, end = TIME_ZERO;
int started = 0;
fd_set fds;
int result;
if (timeout_ms) {
/* Get time at start of operation. */
- gettimeofday(&start, NULL);
+ time_get(&start);
/* Define duration of timeout. */
- delta.tv_sec = timeout_ms / 1000;
- delta.tv_usec = (timeout_ms % 1000) * 1000;
+ time_set_ms(&delta, timeout_ms);
/* Calculate time at which we should give up. */
- timeradd(&start, &delta, &end);
+ time_add(&start, &delta, &end);
}
FD_ZERO(&fds);
* to avoid any issues if a short timeout is reached before
* select() is even run.
*/
+ struct timeval tv;
if (timeout_ms && started) {
- gettimeofday(&now, NULL);
- if (timercmp(&now, &end, >))
+ time_get(&now);
+ if (time_greater(&now, &end))
/* Timeout has expired. */
break;
- timersub(&end, &now, &delta);
+ time_sub(&end, &now, &delta);
+ time_as_timeval(&delta, &tv);
}
- result = select(port->fd + 1, &fds, NULL, NULL, timeout_ms ? &delta : NULL);
+ result = select(port->fd + 1, &fds, NULL, NULL, timeout_ms ? &tv : NULL);
started = 1;
if (result < 0) {
if (errno == EINTR) {
#else
size_t bytes_read = 0;
- struct timeval start, delta, now, end = {0, 0};
+ struct time start, delta, now, end = TIME_ZERO;
int started = 0;
fd_set fds;
int result;
if (timeout_ms) {
/* Get time at start of operation. */
- gettimeofday(&start, NULL);
+ time_get(&start);
/* Define duration of timeout. */
- delta.tv_sec = timeout_ms / 1000;
- delta.tv_usec = (timeout_ms % 1000) * 1000;
+ time_set_ms(&delta, timeout_ms);
/* Calculate time at which we should give up. */
- timeradd(&start, &delta, &end);
+ time_add(&start, &delta, &end);
}
FD_ZERO(&fds);
* to avoid any issues if a short timeout is reached before
* select() is even run.
*/
+ struct timeval tv;
if (timeout_ms && started) {
- gettimeofday(&now, NULL);
- if (timercmp(&now, &end, >))
+ time_get(&now);
+ if (time_greater(&now, &end))
/* Timeout has expired. */
break;
- timersub(&end, &now, &delta);
+ time_sub(&end, &now, &delta);
+ time_as_timeval(&delta, &tv);
}
- result = select(port->fd + 1, &fds, NULL, NULL, timeout_ms ? &delta : NULL);
+ result = select(port->fd + 1, &fds, NULL, NULL, timeout_ms ? &tv : NULL);
started = 1;
if (result < 0) {
if (errno == EINTR) {
RETURN_OK();
#else
- struct timeval start, delta, now, end = {0, 0};
- const struct timeval max_delta = {
- (INT_MAX / 1000), (INT_MAX % 1000) * 1000
- };
+ struct time start, delta, now, end = TIME_ZERO;
+ const struct time max_delta = TIME_MS(INT_MAX);
int started = 0, timeout_overflow = 0;
int result, timeout_remaining_ms;
struct pollfd *pollfds;
if (timeout_ms) {
/* Get time at start of operation. */
- gettimeofday(&start, NULL);
+ time_get(&start);
/* Define duration of timeout. */
- delta.tv_sec = timeout_ms / 1000;
- delta.tv_usec = (timeout_ms % 1000) * 1000;
+ time_set_ms(&delta, timeout_ms);
/* Calculate time at which we should give up. */
- timeradd(&start, &delta, &end);
+ time_add(&start, &delta, &end);
}
/* Loop until an event occurs. */
timeout_overflow = (timeout_ms > INT_MAX);
timeout_remaining_ms = timeout_overflow ? INT_MAX : timeout_ms;
} else {
- gettimeofday(&now, NULL);
- if (timercmp(&now, &end, >)) {
+ time_get(&now);
+ if (time_greater(&now, &end)) {
DEBUG("Wait timed out");
break;
}
- timersub(&end, &now, &delta);
- if ((timeout_overflow = timercmp(&delta, &max_delta, >)))
+ time_sub(&end, &now, &delta);
+ if ((timeout_overflow = time_greater(&delta, &max_delta)))
delta = max_delta;
- timeout_remaining_ms = delta.tv_sec * 1000 + delta.tv_usec / 1000;
+ timeout_remaining_ms = time_as_ms(&delta);
}
result = poll(pollfds, event_set->count, timeout_remaining_ms);
projects / libserialport.git / blobdiff