func CreateContextUnsafe(properties *C.cl_context_properties, devices []*Device, pfn_notify CL_ctx_notify, user_data unsafe.Pointer) (*Context, error) {
deviceIds := buildDeviceIdList(devices)
var err C.cl_int
var clContext C.cl_context
if pfn_notify != nil {
var c_user_data []unsafe.Pointer
c_user_data = make([]unsafe.Pointer, 2)
c_user_data[0] = user_data
c_user_data[1] = unsafe.Pointer(&pfn_notify)
ctx_notify[c_user_data[1]] = pfn_notify
clContext = C.CLCreateContext(properties, C.cl_uint(len(devices)), &deviceIds[0], unsafe.Pointer(&c_user_data), &err)
} else {
clContext = C.clCreateContext(properties, C.cl_uint(len(devices)), &deviceIds[0], nil, nil, &err)
}
if err != C.CL_SUCCESS {
return nil, toError(err)
}
if clContext == nil {
return nil, ErrUnknown
}
context := &Context{clContext: clContext, devices: devices}
runtime.SetFinalizer(context, releaseContext)
return context, nil
}
func CLCreateContext(properties []CL_context_properties,
num_devices CL_uint,
devices []CL_device_id,
pfn_notify CL_ctx_notify,
user_data unsafe.Pointer,
errcode_ret *CL_int) CL_context {
var c_errcode_ret C.cl_int
var c_context C.cl_context
if num_devices == 0 || devices == nil || (pfn_notify == nil && user_data != nil) {
c_errcode_ret = CL_INVALID_VALUE
c_context = nil
} else {
var c_properties []C.cl_context_properties
var c_properties_ptr *C.cl_context_properties
var c_devices []C.cl_device_id
var c_devices_ptr *C.cl_device_id
if properties != nil {
c_properties = make([]C.cl_context_properties, len(properties))
for i := 0; i < len(properties); i++ {
c_properties[i] = C.cl_context_properties(properties[i])
}
c_properties_ptr = &c_properties[0]
} else {
c_properties_ptr = nil
}
if devices != nil {
c_devices = make([]C.cl_device_id, len(devices))
for i := 0; i < len(devices); i++ {
c_devices[i] = C.cl_device_id(devices[i].cl_device_id)
}
c_devices_ptr = &c_devices[0]
} else {
c_devices_ptr = nil
}
if pfn_notify != nil {
var c_user_data []unsafe.Pointer
c_user_data = make([]unsafe.Pointer, 2)
c_user_data[0] = user_data
c_user_data[1] = unsafe.Pointer(&pfn_notify)
ctx_notify[c_user_data[1]] = pfn_notify
c_context = C.CLCreateContext(c_properties_ptr,
C.cl_uint(len(c_devices)),
c_devices_ptr,
unsafe.Pointer(&c_user_data),
&c_errcode_ret)
} else {
c_context = C.clCreateContext(c_properties_ptr,
C.cl_uint(len(c_devices)),
c_devices_ptr,
nil,
nil,
&c_errcode_ret)
}
}
if errcode_ret != nil {
*errcode_ret = CL_int(c_errcode_ret)
}
return CL_context{c_context}
}