clRetainEvent - Increments the event reference count.

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       Returns CL_SUCCESS if the function executed successfully, or one of the errors below:

       •   CL_INVALID_EVENT if event is not a valid event object.

       •   CL_OUT_OF_RESOURCES if there is a failure to allocate resources required by the OpenCL implementation
           on the device.

       •   CL_OUT_OF_HOST_MEMORY if there is a failure to allocate resources required by the OpenCL
           implementation on the host.

       clRetainEvent - Increments the event reference count.

       cl_intclRetainEvent(cl_eventevent);

        1. OpenCL Specification
           page 184, section 5.9 - Event Objects

The Khronos Group                                  11/18/2024                                CLRETAINEVENT(3clc)

event
           Event object being retained.

clGetEventInfo(3clc), clReleaseEvent(3clc), clWaitForEvents(3clc)

OpenCLSpecification[1]