X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=serialport.c;h=80527be098a85eed8d624ce7ff8dd4e5dc594e12;hb=5f64c28551d7ee7dbecf5215cb75d63c3cf8303b;hp=5183a85068d431996f970d9f714540b7c0ee9288;hpb=ac323d80e0baaf6968c316dbcb2e5ffe4739cb2e;p=libserialport.git

diff --git a/serialport.c b/serialport.c
index 5183a85..80527be 100644
--- a/serialport.c
+++ b/serialport.c
@@ -126,7 +126,7 @@ SP_API char *sp_get_port_name(const struct sp_port *port)
 	RETURN_STRING(port->name);
 }
 
-SP_API char *sp_get_port_description(struct sp_port *port)
+SP_API char *sp_get_port_description(const struct sp_port *port)
 {
 	TRACE("%p", port);
 
@@ -136,7 +136,7 @@ SP_API char *sp_get_port_description(struct sp_port *port)
 	RETURN_STRING(port->description);
 }
 
-SP_API enum sp_transport sp_get_port_transport(struct sp_port *port)
+SP_API enum sp_transport sp_get_port_transport(const struct sp_port *port)
 {
 	TRACE("%p", port);
 
@@ -234,6 +234,8 @@ SP_API enum sp_return sp_get_port_handle(const struct sp_port *port,
 
 	if (!port)
 		RETURN_ERROR(SP_ERR_ARG, "Null port");
+	if (!result_ptr)
+		RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
 
 #ifdef _WIN32
 	HANDLE *handle_ptr = result_ptr;
@@ -322,8 +324,10 @@ fail:
 
 SP_API enum sp_return sp_list_ports(struct sp_port ***list_ptr)
 {
+#ifndef NO_ENUMERATION
 	struct sp_port **list;
 	int ret;
+#endif
 
 	TRACE("%p", list_ptr);
 
@@ -711,18 +715,18 @@ SP_API enum sp_return sp_drain(struct sp_port *port)
 }
 
 SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
-                                        size_t count, unsigned int timeout)
+                                        size_t count, unsigned int timeout_ms)
 {
-	TRACE("%p, %p, %d, %d", port, buf, count, timeout);
+	TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
 
 	CHECK_OPEN_PORT();
 
 	if (!buf)
 		RETURN_ERROR(SP_ERR_ARG, "Null buffer");
 
-	if (timeout)
+	if (timeout_ms)
 		DEBUG_FMT("Writing %d bytes to port %s, timeout %d ms",
-			count, port->name, timeout);
+			count, port->name, timeout_ms);
 	else
 		DEBUG_FMT("Writing %d bytes to port %s, no timeout",
 			count, port->name);
@@ -745,7 +749,7 @@ SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
 	}
 
 	/* Set timeout. */
-	port->timeouts.WriteTotalTimeoutConstant = timeout;
+	port->timeouts.WriteTotalTimeoutConstant = timeout_ms;
 	if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
 		RETURN_FAIL("SetCommTimeouts() failed");
 
@@ -770,12 +774,12 @@ SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
 	fd_set fds;
 	int result;
 
-	if (timeout) {
+	if (timeout_ms) {
 		/* Get time at start of operation. */
 		gettimeofday(&start, NULL);
 		/* Define duration of timeout. */
-		delta.tv_sec = timeout / 1000;
-		delta.tv_usec = (timeout % 1000) * 1000;
+		delta.tv_sec = timeout_ms / 1000;
+		delta.tv_usec = (timeout_ms % 1000) * 1000;
 		/* Calculate time at which we should give up. */
 		timeradd(&start, &delta, &end);
 	}
@@ -785,7 +789,7 @@ SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
 		/* Wait until space is available. */
 		FD_ZERO(&fds);
 		FD_SET(port->fd, &fds);
-		if (timeout) {
+		if (timeout_ms) {
 			gettimeofday(&now, NULL);
 			if (timercmp(&now, &end, >)) {
 				DEBUG("Write timed out");
@@ -793,7 +797,7 @@ SP_API enum sp_return sp_blocking_write(struct sp_port *port, const void *buf,
 			}
 			timersub(&end, &now, &delta);
 		}
-		result = select(port->fd + 1, NULL, &fds, NULL, timeout ? &delta : NULL);
+		result = select(port->fd + 1, NULL, &fds, NULL, timeout_ms ? &delta : NULL);
 		if (result < 0) {
 			if (errno == EINTR) {
 				DEBUG("select() call was interrupted, repeating");
@@ -908,18 +912,18 @@ SP_API enum sp_return sp_nonblocking_write(struct sp_port *port,
 }
 
 SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
-                                       size_t count, unsigned int timeout)
+                                       size_t count, unsigned int timeout_ms)
 {
-	TRACE("%p, %p, %d, %d", port, buf, count, timeout);
+	TRACE("%p, %p, %d, %d", port, buf, count, timeout_ms);
 
 	CHECK_OPEN_PORT();
 
 	if (!buf)
 		RETURN_ERROR(SP_ERR_ARG, "Null buffer");
 
-	if (timeout)
+	if (timeout_ms)
 		DEBUG_FMT("Reading %d bytes from port %s, timeout %d ms",
-			count, port->name, timeout);
+			count, port->name, timeout_ms);
 	else
 		DEBUG_FMT("Reading %d bytes from port %s, no timeout",
 			count, port->name);
@@ -934,7 +938,7 @@ SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
 
 	/* Set timeout. */
 	port->timeouts.ReadIntervalTimeout = 0;
-	port->timeouts.ReadTotalTimeoutConstant = timeout;
+	port->timeouts.ReadTotalTimeoutConstant = timeout_ms;
 	if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
 		RETURN_FAIL("SetCommTimeouts() failed");
 
@@ -972,12 +976,12 @@ SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
 	fd_set fds;
 	int result;
 
-	if (timeout) {
+	if (timeout_ms) {
 		/* Get time at start of operation. */
 		gettimeofday(&start, NULL);
 		/* Define duration of timeout. */
-		delta.tv_sec = timeout / 1000;
-		delta.tv_usec = (timeout % 1000) * 1000;
+		delta.tv_sec = timeout_ms / 1000;
+		delta.tv_usec = (timeout_ms % 1000) * 1000;
 		/* Calculate time at which we should give up. */
 		timeradd(&start, &delta, &end);
 	}
@@ -987,14 +991,14 @@ SP_API enum sp_return sp_blocking_read(struct sp_port *port, void *buf,
 		/* Wait until data is available. */
 		FD_ZERO(&fds);
 		FD_SET(port->fd, &fds);
-		if (timeout) {
+		if (timeout_ms) {
 			gettimeofday(&now, NULL);
 			if (timercmp(&now, &end, >))
 				/* Timeout has expired. */
 				RETURN_INT(bytes_read);
 			timersub(&end, &now, &delta);
 		}
-		result = select(port->fd + 1, &fds, NULL, NULL, timeout ? &delta : NULL);
+		result = select(port->fd + 1, &fds, NULL, NULL, timeout_ms ? &delta : NULL);
 		if (result < 0) {
 			if (errno == EINTR) {
 				DEBUG("select() call was interrupted, repeating");
@@ -1233,22 +1237,22 @@ SP_API void sp_free_event_set(struct sp_event_set *event_set)
 }
 
 SP_API enum sp_return sp_wait(struct sp_event_set *event_set,
-                              unsigned int timeout)
+                              unsigned int timeout_ms)
 {
-	TRACE("%p, %d", event_set, timeout);
+	TRACE("%p, %d", event_set, timeout_ms);
 
 	if (!event_set)
 		RETURN_ERROR(SP_ERR_ARG, "Null event set");
 
 #ifdef _WIN32
 	if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE,
-			timeout ? timeout : INFINITE) == WAIT_FAILED)
+			timeout_ms ? timeout_ms : INFINITE) == WAIT_FAILED)
 		RETURN_FAIL("WaitForMultipleObjects() failed");
 
 	RETURN_OK();
 #else
 	struct timeval start, delta, now, end = {0, 0};
-	int result, timeout_remaining;
+	int result, timeout_remaining_ms;
 	struct pollfd *pollfds;
 	unsigned int i;
 
@@ -1267,29 +1271,29 @@ SP_API enum sp_return sp_wait(struct sp_event_set *event_set,
 			pollfds[i].events |= POLLERR;
 	}
 
-	if (timeout) {
+	if (timeout_ms) {
 		/* Get time at start of operation. */
 		gettimeofday(&start, NULL);
 		/* Define duration of timeout. */
-		delta.tv_sec = timeout / 1000;
-		delta.tv_usec = (timeout % 1000) * 1000;
+		delta.tv_sec = timeout_ms / 1000;
+		delta.tv_usec = (timeout_ms % 1000) * 1000;
 		/* Calculate time at which we should give up. */
 		timeradd(&start, &delta, &end);
 	}
 
 	/* Loop until an event occurs. */
 	while (1) {
-		if (timeout) {
+		if (timeout_ms) {
 			gettimeofday(&now, NULL);
 			if (timercmp(&now, &end, >)) {
 				DEBUG("Wait timed out");
 				break;
 			}
 			timersub(&end, &now, &delta);
-			timeout_remaining = delta.tv_sec * 1000 + delta.tv_usec / 1000;
+			timeout_remaining_ms = delta.tv_sec * 1000 + delta.tv_usec / 1000;
 		}
 
-		result = poll(pollfds, event_set->count, timeout ? timeout_remaining : -1);
+		result = poll(pollfds, event_set->count, timeout_ms ? timeout_remaining_ms : -1);
 
 		if (result < 0) {
 			if (errno == EINTR) {