To release a device, call the function:
|clReleaseDevice is missing before version 1.2.
clReleaseDevice decrements the device reference count if device is a
valid sub-device created by a call to clCreateSubDevices.
If device is a root level device i.e. a
cl_device_ returned by
clGetDeviceIDs, the device reference count remains unchanged.
CL_SUCCESS if the function is executed
Otherwise, it returns one of the following errors:
CL_INVALID_if device is not a valid device.
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
After the device reference count becomes zero and all the objects attached to device (such as command-queues) are released, the device object is deleted. Using this function to release a reference that was not obtained by creating the object or by calling clRetainDevice causes undefined behavior.
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.