To release an event object, call the function
The event reference count is decremented.
The event object is deleted once the reference count becomes zero, the specific command identified by this event has completed (or terminated) and there are no commands in the command-queues of a context that require a wait for this event to complete. Using this function to release a reference that was not obtained by creating the object or by calling clRetainEvent causes undefined behavior.
Developers should be careful when releasing their last reference count on
events created by clCreateUserEvent that have not yet been set to status
CL_SUCCESS if the function is executed
Otherwise, it returns one of the following errors:
CL_INVALID_if event is not a valid event object.
CL_OUT_if there is a failure to allocate resources required by the OpenCL implementation on the device.
CL_OUT_if there is a failure to allocate resources required by the OpenCL implementation on the host.
OF_ HOST_ MEMORY
For more information, see the OpenCL Specification
This page is extracted from the OpenCL Specification. Fixes and changes should be made to the Specification, not directly.