Golang C.longlong函數代碼示例

func getOffsetByUSec(zone string, timestamp int64) int32 {
	czone := C.CString(zone)
	defer C.free(unsafe.Pointer(czone))
	offset := C.get_offset_by_usec(czone, C.longlong(timestamp))

	return int32(offset)
}

func main() {
	xs := make([]int64, 4096)
	for i := 0; i < len(xs); i++ {
		xs[i] = int64(rand.Int())
	}
	fmt.Println(C.sum((*C.longlong)(unsafe.Pointer(&xs[0])), C.longlong(len(xs))))
}

func getRawUSec(zone string, timestamp int64) int64 {
	czone := C.CString(zone)
	defer C.free(unsafe.Pointer(czone))
	ret := C.get_rawoffset_usec(czone, C.longlong(timestamp))

	return int64(ret)
}

func (ptr *QWebSocket) BytesWritten(bytes int64) {
	defer qt.Recovering("QWebSocket::bytesWritten")

	if ptr.Pointer() != nil {
		C.QWebSocket_BytesWritten(ptr.Pointer(), C.longlong(bytes))
	}
}

func (ptr *QWebSocket) SetReadBufferSize(size int64) {
	defer qt.Recovering("QWebSocket::setReadBufferSize")

	if ptr.Pointer() != nil {
		C.QWebSocket_SetReadBufferSize(ptr.Pointer(), C.longlong(size))
	}
}

func ReadAt(fd int, off int64, size int) ([]byte, error) {
	idx := <-idle_event
	retch := aio_result_map[idx]
	defer func() { idle_event <- idx }()

	var cb *C.struct_iocb = &cbs[idx]

	var read_buf unsafe.Pointer
	C.posix_memalign(&read_buf, pagesize, C.size_t(size))
	defer C.free(read_buf)

	C.io_prep_pread(cb, C.int(fd), read_buf, C.size_t(size), C.longlong(off))
	cbs[idx].data = unsafe.Pointer(&idx)

	aio_lock.Lock()
	rt := C.io_submit(ctx, 1, &cb)
	if int(rt) < 0 {
		aio_lock.Unlock()
		return nil, errors.New("io submit failed")
	}
	aiocount++
	aio_lock.Unlock()

	select {
	case have_aio_event <- 0:
	default:
	}

	ret := <-retch

	return ret.buf, ret.err
}

func (lua *Lua) PushGoValue(value reflect.Value) {
	switch t := value.Type(); t.Kind() {
	case reflect.Bool:
		if value.Bool() {
			C.lua_pushboolean(lua.State, C.int(1))
		} else {
			C.lua_pushboolean(lua.State, C.int(0))
		}
	case reflect.String:
		C.lua_pushstring(lua.State, C.CString(value.String()))
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		C.lua_pushnumber(lua.State, C.lua_Number(C.longlong(value.Int())))
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		C.lua_pushnumber(lua.State, C.lua_Number(C.ulonglong(value.Uint())))
	case reflect.Float32, reflect.Float64:
		C.lua_pushnumber(lua.State, C.lua_Number(C.double(value.Float())))
	case reflect.Slice:
		length := value.Len()
		C.lua_createtable(lua.State, C.int(length), 0)
		for i := 0; i < length; i++ {
			C.lua_pushnumber(lua.State, C.lua_Number(i+1))
			lua.PushGoValue(value.Index(i))
			C.lua_settable(lua.State, -3)
		}
	case reflect.Interface:
		lua.PushGoValue(value.Elem())
	case reflect.Ptr, reflect.UnsafePointer:
		C.lua_pushlightuserdata(lua.State, unsafe.Pointer(value.Pointer()))
	default:
		lua.Panic("wrong return value %v %v", value, t.Kind())
	}
}

// SetNum sets a number in the specified field of the engine configuration.
// Certain fields accept only 32-bit numbers, silently truncating the higher bits
// of the engine config. See dat.go for more information.
func (e *Engine) SetNum(field EngineField, num uint64) error {
	err := C.cl_engine_set_num((*C.struct_cl_engine)(e), C.enum_cl_engine_field(field), C.longlong(num))
	if ErrorCode(err) != Success {
		return fmt.Errorf("%v", StrError(ErrorCode(err)))
	}
	return nil
}

func cTraceRays(computator CComputationManager, startIndex, endIndex int64) [][]float32 {
	indicesSize := endIndex - startIndex + 1

	results := make([][]float32, indicesSize)
	refResults := make([]*float32, indicesSize)

	for i := range results {
		data := make([]float32, 3)
		results[i] = data
		refResults[i] = (*float32)(unsafe.Pointer(&data[0]))
	}

	resultsPtr := (**C.float)(unsafe.Pointer((&refResults[0])))
	C.traceRays(computator.p, C.longlong(startIndex), C.longlong(endIndex), resultsPtr)

	return results
}

/// Returns the predicted head pose in outHmdTrackingState and offset eye poses in outEyePoses.
///
/// This is a thread-safe function where caller should increment frameIndex with every frame
/// and pass that index where applicable to functions called on the rendering thread.
/// Assuming outEyePoses are used for rendering, it should be passed as a part of ovrLayerEyeFov.
/// The caller does not need to worry about applying HmdToEyeOffset to the returned outEyePoses variables.
///
/// \param[in]  hmd Specifies an ovrSession previously returned by ovr_Create.
/// \param[in]  frameIndex Specifies the targeted frame index, or 0 to refer to one frame after
///             the last time ovr_SubmitFrame was called.
/// \param[in]  HmdToEyeOffset Can be ovrEyeRenderDesc.HmdToEyeOffset returned from
///             ovr_GetRenderDesc. For monoscopic rendering, use a vector that is the average
///             of the two vectors for both eyes.
/// \param[in]  latencyMarker Specifies that this call is the point in time where
///             the "App-to-Mid-Photon" latency timer starts from. If a given ovrLayer
///             provides "SensorSampleTimestamp", that will override the value stored here.
/// \param[out] outEyePoses The predicted eye poses.
/// \param[out] outSensorSampleTime The time when this function was called. May be NULL, in which case it is ignored.
func (s *Session) GetEyePoses(frameIndex uint64, latencyMarker bool, hmdToEyeOffset [2]Vector3f) ([2]Posef, float64) {
	var cHmdToEyeViewOffset [2]C.ovrVector3f
	cHmdToEyeViewOffset[0] = cVector3f(hmdToEyeOffset[0])
	cHmdToEyeViewOffset[1] = cVector3f(hmdToEyeOffset[1])
	var cEyePoses [2]C.ovrPosef
	var cSensorSampleTime C.double
	C.ovr_GetEyePoses(s.cSession, C.longlong(frameIndex), ovrBool(latencyMarker), &cHmdToEyeViewOffset[0], &cEyePoses[0], &cSensorSampleTime)
	return [2]Posef{goPosef(cEyePoses[0]), goPosef(cEyePoses[1])}, float64(cSensorSampleTime)
}

//export x_GoReader_Seek
func x_GoReader_Seek(pGoReader C.GoReaderPtr, offset int64, whence int) C.longlong {
	reader := (*(*io.Reader)(pGoReader))
	seeker := reader.(io.Seeker)
	n, err := seeker.Seek(offset, whence)
	if err != nil {
		return -1
	}
	return C.longlong(n)
}

func (t *TypedParameters) TypedParamsAddInt64(val int64, name string) error {
	cname := C.CString(name)
	defer C.free(unsafe.Pointer(cname))

	result := C.virTypedParamsAddLLong(&t.cptr, &t.length, &t.capacity, cname, C.longlong(val))
	if result == -1 {
		return GetLastError()
	}
	return nil
}

func (sch *aioScheduler) Read(fd int, buf []byte, off uint64) (int, error) {
	iocb := &C.iocb_t{}
	sh := *(*reflect.SliceHeader)(unsafe.Pointer(&buf))
	C.io_prep_pread(iocb, C.int(fd), unsafe.Pointer(sh.Data), C.size_t(sh.Len), C.longlong(off))
	ev, err := sch.submit(iocb)
	if err != nil {
		return 0, err
	}

	return int(ev.wait()), nil
}

func unpack_kv(pack *C.struct___0, v reflect.Value) *McpackError {
	vt := v.Type()

	for i := 0; i < v.NumField(); i++ {
		vtf := vt.Field(i)
		vf := v.Field(i)

		realName := vtf.Tag.Get("mcpack")
		if realName == "" {
			realName = vtf.Name
		}

		switch vf.Kind() {
		case reflect.Struct:
			subpack := C.mc_pack_get_object(pack, C.CString(realName))
			if err := unpack_kv(subpack, vf); err != nil {
				return err
			}
		case reflect.Interface:
			subpack := C.mc_pack_get_object(pack, C.CString(realName))
			evf := vf.Elem().Elem()
			if err := unpack_kv(subpack, evf); err != nil {
				return err
			}
		case reflect.String:
			value_c := C.mc_pack_get_str(pack, C.CString(realName))
			vf.SetString(C.GoString(value_c))
		case reflect.Int, reflect.Int32:
			value_i := C.int(0)
			C.go_mc_pack_get_int32(pack, C.CString(realName), &value_i)
			vf.SetInt(int64(value_i))
		case reflect.Int64:
			value_i := C.longlong(0)
			C.go_mc_pack_get_int64(pack, C.CString(realName), &value_i)
			vf.SetInt(int64(value_i))
		case reflect.Slice, reflect.Array:
			if vf.Type().Elem().Kind() != reflect.Uint8 {
				return &McpackError{"unspport slice type"}
			}
			value_len := C.int(0)
			value_r := C.go_mc_pack_get_raw(pack, C.CString(realName), &value_len)
			vf.SetBytes(C.GoBytes(unsafe.Pointer(value_r), value_len))

		default:
			return &McpackError{"unsupport type: " + v.Kind().String()}
		}
	}

	return nil
}

// SendProcessSignal sends a signal to the designated process in the guest.
func (dom Domain) SendProcessSignal(pid int64, signal DomainProcessSignal) error {
	dom.log.Printf("sending signal %v to domain's process %v...\n", signal, pid)
	cRet := C.virDomainSendProcessSignal(dom.virDomain, C.longlong(pid), C.uint(signal), 0)
	ret := int32(cRet)

	if ret == -1 {
		err := LastError()
		dom.log.Printf("an error occurred: %v\n", err)
		return err
	}

	dom.log.Println("signal sent")

	return nil
}