context reference count.
cl_int clRetainContext(cl_context context)
The context to retain.
clCreateContextFromType perform an implicit retain.
This is very helpful for 3rd party libraries, which typically get a context passed to them by the application.
However, it is possible that the application may delete the context without informing the library.
Allowing functions to attach to (i.e.
retain) and release a context solves the problem of a context being used by a library no longer being valid.
CL_SUCCESS if the function is executed successfully.
Otherwise, it returns one of the following values:
contextis not a valid OpenCL context.
CL_OUT_OF_RESOURCESif there is a failure to allocate resources required by the OpenCL implementation on the device.
CL_OUT_OF_HOST_MEMORYif there is a failure to allocate resources required by the OpenCL implementation on the host.