Add xRingbufferCanRead, xRingbufferCanWrite

Add function xRingbufferCanRead & xRingbufferCanWrite
to be able use queue sets. Without it is not possible
to check to which ringbuffer returned semaphore belongs.

components/freertos/include/freertos/ringbuf.h

@@ -297,6 +297,33 @@ BaseType_t xRingbufferAddToQueueSetRead(RingbufHandle_t ringbuf, QueueSetHandle_
  */
 BaseType_t xRingbufferAddToQueueSetWrite(RingbufHandle_t ringbuf, QueueSetHandle_t xQueueSet);
 
+/**
+ * @brief Check if the selected queue set member is the ringbuffer's read semaphore
+ *
+ * This API checks if queue set member returned from xQueueSelectFromSet
+ * is the read semaphore of this ring buffer. If so, this indicates the ring buffer
+ * has items waiting to be read.
+ *
+ * @param ringbuf Ring buffer which should be checked
+ * @param member Member returned from xQueueSelectFromSet
+ *
+ * @return pdTRUE when semaphore belongs to ringbuffer, pdFALSE otherwise.
+ */
+BaseType_t xRingbufferCanRead(RingbufHandle_t ringbuf, QueueSetMemberHandle_t member);
+
+/**
+ * @brief Check if the selected queue set member is the ringbuffer's write semaphore
+ *
+ * This API checks if queue set member returned from xQueueSelectFromSet
+ * is the write semaphore of this ring buffer. If so, this indicates the ring buffer
+ * has items waiting for write.
+ *
+ * @param ringbuf Ring buffer which should be checked
+ * @param member Member returned from xQueueSelectFromSet
+ *
+ * @return pdTRUE when semaphore belongs to ringbuffer, pdFALSE otherwise.
+ */
+BaseType_t xRingbufferCanWrite(RingbufHandle_t ringbuf, QueueSetMemberHandle_t member);
 
 /**
  * @brief  Remove the ringbuffer from a queue set.

components/freertos/ringbuf.c

@@ -409,6 +409,24 @@ static void returnItemToRingbufBytebuf(ringbuf_t *rb, void *item) {
     //Free the read memory.
     rb->free_ptr=rb->read_ptr;
 }
+/*
+    Check if the selected queue set member is the ringbuffer's read semaphore
+*/
+BaseType_t xRingbufferCanRead(RingbufHandle_t ringbuf, QueueSetMemberHandle_t member)
+{
+    ringbuf_t *rb=(ringbuf_t *)ringbuf;
+    configASSERT(rb);
+    return (rb->items_buffered_sem == member)? pdTRUE : pdFALSE;
+}
+/*
+    Check if the selected queue set member is the ringbuffer's write semaphore
+*/
+BaseType_t xRingbufferCanWrite(RingbufHandle_t ringbuf, QueueSetMemberHandle_t member)
+{
+    ringbuf_t *rb=(ringbuf_t *)ringbuf;
+    configASSERT(rb);
+    return (rb->free_space_sem == member)? pdTRUE : pdFALSE;
+}
 
 void xRingbufferPrintInfo(RingbufHandle_t ringbuf)
 {