static enum sp_return set_config(struct sp_port *port, struct port_data *data,
const struct sp_port_config *config);
+#ifndef _WIN32
+static void get_time(struct timeval *time)
+{
+#ifdef HAVE_CLOCK_GETTIME
+ struct timespec ts;
+ if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1)
+ clock_gettime(CLOCK_REALTIME, &ts);
+ time->tv_sec = ts.tv_sec;
+ time->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_sec = ns / 1000000000;
+ time->tv_usec = (ns % 1000000000) / 1000;
+#else
+ gettimeofday(time, NULL);
+#endif
+}
+#endif
+
SP_API enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
{
struct sp_port *port;
#ifdef _WIN32
port->usb_path = NULL;
port->hdl = INVALID_HANDLE_VALUE;
+ port->write_buf = NULL;
+ port->write_buf_size = 0;
#else
port->fd = -1;
#endif
#ifdef _WIN32
if (port->usb_path)
free(port->usb_path);
+ if (port->write_buf)
+ free(port->write_buf);
#endif
free(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)
CLOSE_OVERLAPPED(write_ovl);
CLOSE_OVERLAPPED(wait_ovl);
+ if (port->write_buf) {
+ free(port->write_buf);
+ port->write_buf = NULL;
+ }
#else
/* Returns 0 upon success, -1 upon failure. */
if (close(port->fd) == -1)
#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");
if (timeout_ms) {
/* Get time at start of operation. */
- gettimeofday(&start, NULL);
+ get_time(&start);
/* Define duration of timeout. */
delta.tv_sec = timeout_ms / 1000;
delta.tv_usec = (timeout_ms % 1000) * 1000;
* select() is even run.
*/
if (timeout_ms && started) {
- gettimeofday(&now, NULL);
+ get_time(&now);
if (timercmp(&now, &end, >))
/* Timeout has expired. */
break;
RETURN_INT(0);
#ifdef _WIN32
- DWORD written = 0;
- BYTE *ptr = (BYTE *) buf;
+ DWORD buf_bytes;
/* Check whether previous write is complete. */
if (port->writing) {
RETURN_FAIL("SetCommTimeouts() failed");
}
- /*
- * Keep writing data until the OS has to actually start an async IO
- * for it. At that point we know the buffer is full.
- */
- while (written < count) {
- /* Copy first byte of user buffer. */
- port->pending_byte = *ptr++;
-
- /* Start asynchronous write. */
- if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
- if (GetLastError() == ERROR_IO_PENDING) {
- if (HasOverlappedIoCompleted(&port->write_ovl)) {
- DEBUG("Asynchronous write completed immediately");
- port->writing = 0;
- written++;
- continue;
- } else {
- DEBUG("Asynchronous write running");
- port->writing = 1;
- RETURN_INT(++written);
- }
- } else {
- /* Actual failure of some kind. */
- RETURN_FAIL("WriteFile() 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);
+
+ /* Start asynchronous write. */
+ if (WriteFile(port->hdl, port->write_buf, buf_bytes, NULL, &port->write_ovl) == 0) {
+ if (GetLastError() == ERROR_IO_PENDING) {
+ if ((port->writing = !HasOverlappedIoCompleted(&port->write_ovl)))
+ DEBUG("Asynchronous write completed immediately");
+ else
+ DEBUG("Asynchronous write running");
} else {
- DEBUG("Single byte written immediately");
- written++;
+ /* Actual failure of some kind. */
+ RETURN_FAIL("WriteFile() failed");
}
}
DEBUG("All bytes written immediately");
- RETURN_INT(written);
+ RETURN_INT(buf_bytes);
#else
/* Returns the number of bytes written, or -1 upon failure. */
ssize_t written = write(port->fd, buf, count);
- if (written < 0)
- RETURN_FAIL("write() failed");
- else
+ if (written < 0) {
+ if (errno == EAGAIN)
+ // Buffer is full, no bytes written.
+ RETURN_INT(0);
+ else
+ RETURN_FAIL("write() failed");
+ } else {
RETURN_INT(written);
+ }
#endif
}
if (timeout_ms) {
/* Get time at start of operation. */
- gettimeofday(&start, NULL);
+ get_time(&start);
/* Define duration of timeout. */
delta.tv_sec = timeout_ms / 1000;
delta.tv_usec = (timeout_ms % 1000) * 1000;
* select() is even run.
*/
if (timeout_ms && started) {
- gettimeofday(&now, NULL);
+ get_time(&now);
if (timercmp(&now, &end, >))
/* Timeout has expired. */
break;
if (timeout_ms) {
/* Get time at start of operation. */
- gettimeofday(&start, NULL);
+ get_time(&start);
/* Define duration of timeout. */
delta.tv_sec = timeout_ms / 1000;
delta.tv_usec = (timeout_ms % 1000) * 1000;
* select() is even run.
*/
if (timeout_ms && started) {
- gettimeofday(&now, NULL);
+ get_time(&now);
if (timercmp(&now, &end, >))
/* Timeout has expired. */
break;
if (timeout_ms) {
/* Get time at start of operation. */
- gettimeofday(&start, NULL);
+ get_time(&start);
/* Define duration of timeout. */
delta.tv_sec = timeout_ms / 1000;
delta.tv_usec = (timeout_ms % 1000) * 1000;
timeout_overflow = (timeout_ms > INT_MAX);
timeout_remaining_ms = timeout_overflow ? INT_MAX : timeout_ms;
} else {
- gettimeofday(&now, NULL);
+ get_time(&now);
if (timercmp(&now, &end, >)) {
DEBUG("Wait timed out");
break;
DEBUG_FMT("Setting configuration for port %s", port->name);
#ifdef _WIN32
+
+ TRY(await_write_completion(port));
+
if (config->baudrate >= 0) {
for (i = 0; i < NUM_STD_BAUDRATES; i++) {
if (config->baudrate == std_baudrates[i].value) {
if (i == NUM_STD_BAUDRATES)
data->dcb.BaudRate = config->baudrate;
+
+ /* Allocate write buffer for 50ms of data at baud rate. */
+ port->write_buf_size = max(config->baudrate / (8 * 20), 1);
+ port->write_buf = realloc(port->write_buf,
+ port->write_buf_size);
+
+ if (!port->write_buf)
+ RETURN_ERROR(SP_ERR_MEM, "Allocating write buffer failed");
}
if (config->bits >= 0)
projects / libserialport.git / blobdiff