我以为我在某个地方读到过,(尽管我终其一生都找不到源代码),即使用 C++ API,您不必像使用 C API 那样释放设备/内核/内存cl::Kernel、cl::Buffer、cl::Device 的析构函数在类对象超出范围时执行此操作(程序结束等)。但是,在仔细检查 cl.hpp(最新版本,1.1 rev 04)后,我根本看不到任何析构函数的定义。例如,这里是 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
};
有人对这个有了解吗?我应该关心这个吗?在 C++ 包装器文档中,他们甚至没有提到任何类似于 releaseClMemObject 或 free(cl_devices) 等的东西。
谢谢。