I thought I read somewhere, (though, for the life of me, I can’t find the source), that, using the C++ API you don’t have to release devices/kernels/memory like w/ the C API as the destructors for cl::Kernel, cl::Buffer, cl::Device do this when the class objects go out of scope, (end of program, etc). However, upon closer examination of cl.hpp (the latest one, 1.1 rev 04), I don’t see any destructors defined at all. For example, here is cl::Device -
/*! \class Device
* \brief Device interface for cl_device_id.
*/
class Device : public detail::Wrapper<cl_device_id>
{
public:
Device(cl_device_id device) { object_ = device; }
Device() : detail::Wrapper<cl_type>() { }
Device(const Device& device) : detail::Wrapper<cl_type>(device) { }
Device& operator = (const Device& rhs)
{
if (this != &rhs) {
detail::Wrapper<cl_type>::operator=(rhs);
}
return *this;
}
template <typename T>
cl_int getInfo(cl_device_info name, T* param) const
{
return detail::errHandler(
detail::getInfo(&::clGetDeviceInfo, object_, name, param),
__GET_DEVICE_INFO_ERR);
}
template <cl_int name> typename
detail::param_traits<detail::cl_device_info, name>::param_type
getInfo(cl_int* err = NULL) const
{
typename detail::param_traits<
detail::cl_device_info, name>::param_type param;
cl_int result = getInfo(name, ¶m);
if (err != NULL) {
*err = result;
}
return param;
}
#if defined(USE_CL_DEVICE_FISSION)
cl_int createSubDevices(
const cl_device_partition_property_ext * properties,
VECTOR_CLASS<Device>* devices)
{
typedef CL_API_ENTRY cl_int
( CL_API_CALL * PFN_clCreateSubDevicesEXT)(
cl_device_id /*in_device*/,
const cl_device_partition_property_ext * /* properties */,
cl_uint /*num_entries*/,
cl_device_id * /*out_devices*/,
cl_uint * /*num_devices*/ ) CL_EXT_SUFFIX__VERSION_1_1;
static PFN_clCreateSubDevicesEXT pfn_clCreateSubDevicesEXT = NULL;
__INIT_CL_EXT_FCN_PTR(clCreateSubDevicesEXT);
cl_uint n = 0;
cl_int err = pfn_clCreateSubDevicesEXT(object_, properties, 0, NULL, &n);
if (err != CL_SUCCESS) {
return detail::errHandler(err, __CREATE_SUB_DEVICES);
}
cl_device_id* ids = (cl_device_id*) alloca(n * sizeof(cl_device_id));
err = pfn_clCreateSubDevicesEXT(object_, properties, n, ids, NULL);
if (err != CL_SUCCESS) {
return detail::errHandler(err, __CREATE_SUB_DEVICES);
}
devices->assign(&ids[0], &ids[n]);
return CL_SUCCESS;
}
#endif
};
Does anyone know anything about this? Should I care about this? In the C++ wrapper documentation they do not even mention anything resembling releaseClMemObject or free(cl_devices), etc.
Thanks.