[Beignet] [PATCH] Fix event memory leak.

[Yang Rong]

Rlease old event when old event is a valid event.

Signed-off-by: Yang Rong <rong.r.yang at intel.com>
---
 src/cl_api.c   | 5 ++++-
 src/cl_utils.h | 3 +++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/cl_api.c b/src/cl_api.c
index c8d3cee..4288fd1 100644
--- a/src/cl_api.c
+++ b/src/cl_api.c
@@ -79,8 +79,11 @@ handle_events(cl_command_queue queue, cl_int num, const cl_event *wait_list,
 	cl_event_get_timestamp(e, CL_PROFILING_COMMAND_QUEUED);
     }
 
-    if(event != NULL)
+    if(event != NULL) {
+      if(IS_EVENT(*event))
+        cl_event_delete(*event);
       *event = e;
+    }
     if(status == CL_ENQUEUE_EXECUTE_DEFER) {
       cl_event_new_enqueue_callback(e, data, num, wait_list);
     }
diff --git a/src/cl_utils.h b/src/cl_utils.h
index fa900a7..f2cd8a4 100644
--- a/src/cl_utils.h
+++ b/src/cl_utils.h
@@ -149,6 +149,9 @@ do {                                                        \
 struct _cl_mem_image *IMAGE;                                \
 IMAGE = cl_mem_image(MEM);                                  \
 
+#define IS_EVENT(EVENT)                                     \
+        ((EVENT) && (EVENT)->magic == CL_MAGIC_EVENT_HEADER)
+
 #define CHECK_EVENT(EVENT)                                    \
   do {                                                        \
     if (UNLIKELY(EVENT == NULL)) {                            \
-- 
1.9.1