opal/accelerator: add synchronize_stream API

Introduce the synchronize stream operation.

Signed-off-by: Wenduo Wang <wenduwan@amazon.com>

Author: wenduwan

opal/mca/accelerator/accelerator.h

@@ -175,6 +175,16 @@ typedef int (*opal_accelerator_base_module_create_stream_fn_t)(
 typedef int (*opal_accelerator_base_module_destroy_stream_fn_t)(
     opal_accelerator_stream_t *stream);
 
+/**
+ * Wait until a stream's operations are complete
+ *
+ * @param[IN] stream         Stream to wait for
+ *
+ * @return                   OPAL_SUCCESS or error status on failure
+ */
+typedef int (*opal_accelerator_base_module_synchronize_stream_fn_t)(
+    opal_accelerator_stream_t *stream);
+
 /**
  * Creates an event. An event is a synchronization marker that can be
  * appended to a stream to monitor device progress or synchronize the
@@ -417,6 +427,7 @@ typedef struct {
 
     opal_accelerator_base_module_create_stream_fn_t create_stream;
     opal_accelerator_base_module_destroy_stream_fn_t destroy_stream;
+    opal_accelerator_base_module_synchronize_stream_fn_t synchronize_stream;
     opal_accelerator_base_module_create_event_fn_t create_event;
     opal_accelerator_base_module_record_event_fn_t record_event;
     opal_accelerator_base_module_query_event_fn_t query_event;