[winpr,utils] Add Queue_Capacity

winpr/include/winpr/collections.h

@@ -93,6 +93,14 @@ extern "C"
 	 */
 	WINPR_API size_t Queue_Count(wQueue* queue);
 
+	/** @brief Return the allocated elements in the queue
+	 *
+	 *  @param queue A pointer to a queue, must not be \b NULL
+	 *
+	 *  @return the number of objects allocated
+	 */
+	WINPR_API size_t Queue_Capacity(wQueue* queue);
+
 	/** @brief Mutex-Lock a queue
 	 *
 	 *  @param queue A pointer to a queue, must not be \b NULL

winpr/libwinpr/utils/collections/Queue.c

@@ -81,6 +81,19 @@ size_t Queue_Count(wQueue* queue)
 	return ret;
 }
 
+size_t Queue_Capacity(wQueue* queue)
+{
+	WINPR_ASSERT(queue);
+
+	Queue_Lock(queue);
+
+	const size_t ret = queue->capacity;
+
+	Queue_Unlock(queue);
+
+	return ret;
+}
+
 /**
  * Lock access to the ArrayList
  */