Added two tests not calling event calback upon error status (#2028)

#1900 
Tested on POCL, callback is not called.

test_conformance/events/main.cpp

@@ -57,6 +57,8 @@ test_definition test_list[] = {
     ADD_TEST(callbacks),
     ADD_TEST(callbacks_simultaneous),
     ADD_TEST(userevents_multithreaded),
+    ADD_TEST(callback_on_error_simple),
+    ADD_TEST(callback_on_error_enqueue_command)
 };
 
 const int test_num = ARRAY_SIZE(test_list);

test_conformance/events/procs.h

@@ -116,3 +116,11 @@ extern int test_userevents_multithreaded(cl_device_id deviceID,
                                          cl_context context,
                                          cl_command_queue queue,
                                          int num_elements);
+extern int test_callback_on_error_simple(cl_device_id deviceID,
+                                         cl_context context,
+                                         cl_command_queue queue,
+                                         int num_elements);
+extern int test_callback_on_error_enqueue_command(cl_device_id deviceID,
+                                                  cl_context context,
+                                                  cl_command_queue queue,
+                                                  int num_elements);

test_conformance/events/test_callbacks.cpp

@@ -21,6 +21,8 @@
 #if !defined(_MSC_VER)
 #include <unistd.h>
 #endif // !_MSC_VER
+#include <chrono>
+#include <thread>
 
 extern const char *IGetStatusString(cl_int status);
 
@@ -71,6 +73,15 @@ void CL_CALLBACK single_event_callback_function_flags(cl_event event,
     sCallbackTriggered_flag[pdata->index] = true;
 }
 
+void CL_CALLBACK combuf_event_callback_function(cl_event event,
+                                                cl_int commandStatus,
+                                                void *userData)
+{
+    bool *pdata = static_cast<bool *>(userData);
+    log_info("\tEvent callback triggered\n");
+    *pdata = true;
+}
+
 int test_callback_event_single(cl_device_id device, cl_context context,
                                cl_command_queue queue, Action *actionToTest)
 {
@@ -372,3 +383,76 @@ int test_callbacks_simultaneous(cl_device_id deviceID, cl_context context,
     if (actionEvents) delete[] actionEvents;
     return -1;
 }
+
+int test_callback_on_error_simple(cl_device_id deviceID, cl_context context,
+                                  cl_command_queue queue, int num_elements)
+{
+    cl_int error = CL_SUCCESS;
+    clEventWrapper user_event = clCreateUserEvent(context, &error);
+    test_error(error, "clCreateUserEvent failed");
+
+    bool confirmation = false;
+    error = clSetEventCallback(user_event, CL_COMPLETE,
+                               combuf_event_callback_function, &confirmation);
+    test_error(error, "clSetEventCallback failed");
+
+    error = clSetUserEventStatus(user_event, CL_INVALID_VALUE);
+    test_error(error, "clSetUserEventStatus failed");
+
+    // Wait for callback
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+
+    if (!confirmation)
+    {
+        log_error("callback not called upon error status different than "
+                  "CL_SUCCESS\n");
+        return TEST_FAIL;
+    }
+
+    return CL_SUCCESS;
+}
+
+int test_callback_on_error_enqueue_command(cl_device_id deviceID,
+                                           cl_context context,
+                                           cl_command_queue queue,
+                                           int num_elements)
+{
+    cl_int error = CL_SUCCESS;
+    bool confirmation = false;
+
+    clEventWrapper user_event = clCreateUserEvent(context, &error);
+    test_error(error, "clCreateUserEvent failed");
+    clEventWrapper fill_event;
+
+    const cl_int pattern_pri = 0xA;
+    clMemWrapper in_mem =
+        clCreateBuffer(context, CL_MEM_READ_ONLY, sizeof(cl_int) * num_elements,
+                       nullptr, &error);
+    test_error(error, "clCreateBuffer failed");
+
+    error = clEnqueueFillBuffer(queue, in_mem, &pattern_pri, sizeof(cl_int), 0,
+                                num_elements * sizeof(cl_int), 1, &user_event,
+                                &fill_event);
+    test_error(error, "clEnqueueFillBuffer failed");
+
+    error = clSetEventCallback(fill_event, CL_COMPLETE,
+                               combuf_event_callback_function, &confirmation);
+    test_error(error, "clSetEventCallback failed");
+
+    error = clSetUserEventStatus(user_event, CL_INVALID_VALUE);
+    test_error(error, "clSetUserEventStatus failed");
+
+    error = clFinish(queue);
+
+    // Wait for callback
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+
+    if (!confirmation)
+    {
+        log_error("callback not called upon error status different than "
+                  "CL_SUCCESS\n");
+        return TEST_FAIL;
+    }
+
+    return CL_SUCCESS;
+}