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
}
// see https://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html
func CreateContext(properties *ContextProperties, numDevices uint32, devices *DeviceId, notify func(string, unsafe.Pointer, uint64, interface{}), userdata interface{}, errcode *ErrorCode) Context {
ctx := gocontext{nil, notify, userdata}
var f *[0]byte
var u unsafe.Pointer
if notify != nil {
f = (*[0]byte)(C.contextErrorCallback)
u = unsafe.Pointer(&ctx)
}
ctx.clContext = C.clCreateContext((*C.cl_context_properties)(unsafe.Pointer(properties)), C.cl_uint(numDevices), (*C.cl_device_id)(unsafe.Pointer(devices)), f, u, (*C.cl_int)(unsafe.Pointer(errcode)))
return Context(&ctx)
}
// TODO: properties
func CreateContext(devices []*Device) (*Context, error) {
deviceIds := buildDeviceIdList(devices)
var err C.cl_int
clContext := C.clCreateContext(nil, 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 NewContextOfDevices(params map[ContextParameter]interface{}, devices []Device) (*Context, error) {
var c_params []C.cl_context_properties
var propErr error
if c_params, propErr = createParameters(params); propErr != nil {
return nil, propErr
}
c_devices := make([]C.cl_device_id, len(devices))
for i, device := range devices {
c_devices[i] = device.id
}
var c_context C.cl_context
var err C.cl_int
if c_context = C.clCreateContext(&c_params[0], C.cl_uint(len(c_devices)), &c_devices[0], nil, nil, &err); err != C.CL_SUCCESS {
return nil, Cl_error(err)
}
context := &Context{id: c_context}
runtime.SetFinalizer(context, (*Context).release)
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}
}