fix(streams): Allow poll_stream to be NULL

Signed-off-by: Rahix <rahix@rahix.de>

epicardium/modules/stream.c

@@ -52,20 +52,22 @@ int epic_stream_read(int sd, void *buf, size_t count)
 		return -ENODEV;
 	}
 
-	/* Poll the stream */
+	/* Poll the stream, if a poll_stream function exists */
+	if (stream->poll_stream != NULL) {
 		int ret = stream->poll_stream();
 		if (ret < 0) {
 			return ret;
 		}
+	}
 
-	/* Check buffer sizing */
+	/* Check buffer size is a multiple of the data packet size */
 	if (count % stream->item_size != 0) {
 		return -EINVAL;
 	}
 
 	size_t i;
 	for (i = 0; i < count; i += stream->item_size) {
-		if (!xQueueReceive(stream->queue, buf + i, 10)) {
+		if (!xQueueReceive(stream->queue, buf + i, STREAM_QUEUE_WAIT)) {
 			break;
 		}
 	}

epicardium/modules/stream.h

@@ -7,6 +7,8 @@
 #include "FreeRTOS.h"
 #include "queue.h"
 
+#define STREAM_QUEUE_WAIT pdMS_TO_TICKS(10)
+
 /**
  * **Stream Descriptors**:
  *