func (k *Kernel) GlobalWorkGroupSize(device *Device) ([3]int, error) {
var size [3]C.size_t
if err := C.clGetKernelWorkGroupInfo(k.clKernel, device.nullableId(), C.CL_KERNEL_GLOBAL_WORK_SIZE, C.size_t(unsafe.Sizeof(size)), unsafe.Pointer(&size[0]), nil); err != C.CL_SUCCESS {
return [3]int{-1, -1, -1}, toError(err)
}
return [3]int{int(size[0]), int(size[1]), int(size[2])}, nil
}
func (k *Kernel) CompileWorkGroupSize(device *Device) ([3]int, error) {
var wgSize [3]C.size_t
defer C.free(wgSize)
if err := C.clGetKernelWorkGroupInfo(k.clKernel, device.nullableId(), C.CL_KERNEL_COMPILE_WORK_GROUP_SIZE, C.size_t(unsafe.Sizeof(wgSize)), unsafe.Pointer(&wgSize), nil); err != C.CL_SUCCESS {
return [3]int{-1, -1, -1}, toError(err)
}
return [3]int{int(wgSize[0]), int(wgSize[1]), int(wgSize[2])}, nil
}
func CLGetKernelWorkGroupInfo(kernel CL_kernel,
device CL_device_id,
param_name CL_kernel_work_group_info,
param_value_size CL_size_t,
param_value *interface{},
param_value_size_ret *CL_size_t) CL_int {
if (param_value_size == 0 || param_value == nil) && param_value_size_ret == nil {
return CL_INVALID_VALUE
} else {
var c_param_value_size_ret C.size_t
var c_errcode_ret C.cl_int
if param_value_size == 0 || param_value == nil {
c_errcode_ret = C.clGetKernelWorkGroupInfo(kernel.cl_kernel,
device.cl_device_id,
C.cl_kernel_work_group_info(param_name),
C.size_t(param_value_size),
nil,
&c_param_value_size_ret)
} else {
switch param_name {
case CL_KERNEL_GLOBAL_WORK_SIZE,
CL_KERNEL_COMPILE_WORK_GROUP_SIZE:
var value [3]C.size_t
c_errcode_ret = C.clGetKernelWorkGroupInfo(kernel.cl_kernel,
device.cl_device_id,
C.cl_kernel_work_group_info(param_name),
C.size_t(param_value_size),
unsafe.Pointer(&value[0]),
&c_param_value_size_ret)
*param_value = [3]CL_size_t{CL_size_t(value[0]), CL_size_t(value[1]), CL_size_t(value[2])}
case CL_KERNEL_WORK_GROUP_SIZE,
CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE:
var value C.size_t
c_errcode_ret = C.clGetKernelWorkGroupInfo(kernel.cl_kernel,
device.cl_device_id,
C.cl_kernel_work_group_info(param_name),
C.size_t(param_value_size),
unsafe.Pointer(&value),
&c_param_value_size_ret)
*param_value = CL_size_t(value)
case CL_KERNEL_LOCAL_MEM_SIZE,
CL_KERNEL_PRIVATE_MEM_SIZE:
var value C.cl_ulong
c_errcode_ret = C.clGetKernelWorkGroupInfo(kernel.cl_kernel,
device.cl_device_id,
C.cl_kernel_work_group_info(param_name),
C.size_t(param_value_size),
unsafe.Pointer(&value),
&c_param_value_size_ret)
*param_value = CL_ulong(value)
default:
return CL_INVALID_VALUE
}
}
if param_value_size_ret != nil {
*param_value_size_ret = CL_size_t(c_param_value_size_ret)
}
return CL_int(c_errcode_ret)
}
}
// see https://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelWorkGroupInfo.html
func GetKernelWorkGroupInfo(ker Kernel, did DeviceId, paramName KernelWorkGroupInfo, paramValueSize uint64, paramValue unsafe.Pointer, paramValueSizeRet *uint64) ErrorCode {
return ErrorCode(C.clGetKernelWorkGroupInfo(ker, did, C.cl_kernel_work_group_info(paramName), C.size_t(paramValueSize), paramValue, (*C.size_t)(paramValueSizeRet)))
}
func (k *Kernel) PreferredWorkGroupSizeMultiple(device *Device) (int, error) {
var size C.size_t
err := C.clGetKernelWorkGroupInfo(k.clKernel, device.nullableId(), C.CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE, C.size_t(unsafe.Sizeof(size)), unsafe.Pointer(&size), nil)
return int(size), toError(err)
}
func (k *Kernel) WorkGroupPrivateMemSize(device *Device) (int, error) {
var size C.size_t
err := C.clGetKernelWorkGroupInfo(k.clKernel, device.nullableId(), C.CL_KERNEL_PRIVATE_MEM_SIZE, C.size_t(unsafe.Sizeof(size)), unsafe.Pointer(&size), nil)
return int(size), toError(err)
}