Golang C.int32_t函數代碼示例

func (w *window) newBuffer(width, height int,
	format uint32) *C.struct_wl_buffer {

	stride := width * 4
	size := stride * height

	fd := C.os_create_anonymous_file(C.off_t(size))
	if fd < 0 {
		panic("Could not create buffer file.")
	}

	data := C.mmap(nil, C.size_t(size), C.PROT_READ|C.PROT_WRITE,
		C.MAP_SHARED, C.int(fd), 0)
	if *(*int)(data) == -1 {
		panic("mmap failed")
		C.close(fd)
		return nil
	}

	pool := C.wl_shm_create_pool(w.display.shm,
		C.int32_t(fd), C.int32_t(size))
	buffer := C.wl_shm_pool_create_buffer(pool, 0,
		C.int32_t(width), C.int32_t(height),
		C.int32_t(stride), C.uint32_t(format))
	C.wl_shm_pool_destroy(pool)
	C.close(fd)

	w.shmData = data
	return buffer
}

func (s *SystemPort) Open() error {
	if s.isOpen && s.stream == nil {
		return errors.New("Underlying portmidi port is already opened, " +
			"but stream is not connected to this SystemPort.")
	}
	if s.id == -1 || s.isOpen { // Fake port or opened already, ignore.
		return nil
	}
	var errNum C.PmError
	if s.IsInputPort {
		// The input / output naming LOOKS backwards, but we're opening a
		// portmidi "output stream" for input Ports and vice versa.
		errNum = C.Pm_OpenOutput(&(s.stream), C.PmDeviceID(s.id),
			nil, C.int32_t(512), nil, nil, 0)
	} else {
		errNum = C.Pm_OpenInput(&(s.stream), C.PmDeviceID(s.id),
			nil, C.int32_t(512), nil, nil)
	}
	if errNum == 0 {
		s.isOpen = true
		s.stop = make(chan bool, 1)
		s.noteOns = make(chan Note, BufferSize)
		s.noteOffs = make(chan Note, BufferSize)
		s.controlChanges = make(chan ControlChange, BufferSize)
	}
	return makePortMidiError(errNum)
}

func (hll *Hll) AddInt32(value int32) {
	cValue := C.int32_t(value)
	cSeed := C.int32_t(0)

	cHashKey := C.hll_hash_int32(cValue, cSeed)

	C.multiset_add(hll.ms, cHashKey)
}

func (g *Geometry) c() *C.struct_wlc_geometry {
	return C.init_geometry(
		C.int32_t(g.Origin.X),
		C.int32_t(g.Origin.Y),
		C.uint32_t(g.Size.W),
		C.uint32_t(g.Size.H),
	)
}

func New(log2m int, regwidth int, expthresh int64, sparseon int) (*Hll, error) {
	cLog2m := C.int32_t(log2m)
	cRegwidth := C.int32_t(regwidth)
	cExpthresh := C.int64_t(expthresh)
	cSparseon := C.int32_t(sparseon)

	hll := &Hll{ms: C.hll_empty4(cLog2m, cRegwidth, cExpthresh, cSparseon)}
	return hll, nil
}

func redraw(data unsafe.Pointer, callback *C.struct_wl_callback,
	time C.uint32_t) {

	win := (*window)(data)
	win.paintPixels(uint32(time))
	C.wl_surface_attach(win.surface, win.buffer, 0, 0)
	C.wl_surface_damage(win.surface, 0, 0,
		C.int32_t(win.width), C.int32_t(win.height))
}

// Initializes a new output stream.
func NewOutputStream(deviceId DeviceId, bufferSize int64, latency int64) (stream *Stream, err error) {
	var str *C.PmStream
	errCode := C.Pm_OpenOutput(
		(*unsafe.Pointer)(unsafe.Pointer(&str)),
		C.PmDeviceID(deviceId), nil, C.int32_t(bufferSize), nil, nil, C.int32_t(latency))
	if errCode != 0 {
		return nil, convertToError(errCode)
	}
	return &Stream{deviceId: deviceId, pmStream: str}, nil
}

func doICU(tag, caser, input string) string {
	err := C.UErrorCode(0)
	loc := C.CString(tag)
	cm := C.ucasemap_open(loc, C.uint32_t(0), &err)

	buf := make([]byte, len(input)*4)
	dst := (*C.char)(unsafe.Pointer(&buf[0]))
	src := C.CString(input)

	cn := C.int32_t(0)

	switch caser {
	case "fold":
		cn = C.ucasemap_utf8FoldCase(cm,
			dst, C.int32_t(len(buf)),
			src, C.int32_t(len(input)),
			&err)
	case "lower":
		cn = C.ucasemap_utf8ToLower(cm,
			dst, C.int32_t(len(buf)),
			src, C.int32_t(len(input)),
			&err)
	case "upper":
		cn = C.ucasemap_utf8ToUpper(cm,
			dst, C.int32_t(len(buf)),
			src, C.int32_t(len(input)),
			&err)
	case "title":
		cn = C.ucasemap_utf8ToTitle(cm,
			dst, C.int32_t(len(buf)),
			src, C.int32_t(len(input)),
			&err)
	}
	return string(buf[:cn])
}

func (stmt *Stmt) bind(args []driver.Value) error {
	c := stmt.c
	parameterCount := int(stmt.parameterCount)
	if parameterCount == 0 || len(args) == 0 {
		return nil
	}
	parameters := make([]C.struct_nuodb_value, parameterCount)
	for i, v := range args {
		if i >= parameterCount {
			break // go1.0.3 allowed extra args; ignore
		}
		var vt C.enum_nuodb_value_type
		var i32 C.int32_t
		var i64 C.int64_t
		switch v := v.(type) {
		case int64:
			vt = C.NUODB_TYPE_INT64
			i64 = C.int64_t(v)
		case float64:
			vt = C.NUODB_TYPE_FLOAT64
			i64 = *(*C.int64_t)(unsafe.Pointer(&v))
		case bool:
			vt = C.NUODB_TYPE_BOOL
			if v {
				i64 = 1
			} else {
				i64 = 0
			}
		case string:
			vt = C.NUODB_TYPE_STRING
			b := []byte(v)
			args[i] = b // ensure the b is not GC'ed before the _bind
			i32 = C.int32_t(len(v))
			i64 = C.int64_t(uintptr(unsafe.Pointer(&b[0])))
		case []byte:
			vt = C.NUODB_TYPE_BYTES
			i32 = C.int32_t(len(v))
			i64 = C.int64_t(uintptr(unsafe.Pointer(&v[0])))
		case time.Time:
			vt = C.NUODB_TYPE_TIME
			i32 = C.int32_t(v.Nanosecond())
			i64 = C.int64_t(v.Unix()) // seconds
		default:
			vt = C.NUODB_TYPE_NULL
		}
		parameters[i].i64 = i64
		parameters[i].i32 = i32
		parameters[i].vt = vt
	}
	if C.nuodb_statement_bind(c.db, stmt.st,
		(*C.struct_nuodb_value)(unsafe.Pointer(&parameters[0]))) != 0 {
		return c.lastError()
	}
	return nil
}

func populateCIndexEntry(source *IndexEntry, dest *C.git_index_entry) {
	dest.ctime.seconds = C.int32_t(source.Ctime.seconds)
	dest.ctime.nanoseconds = C.uint32_t(source.Ctime.nanoseconds)
	dest.mtime.seconds = C.int32_t(source.Mtime.seconds)
	dest.mtime.nanoseconds = C.uint32_t(source.Mtime.nanoseconds)
	dest.mode = C.uint32_t(source.Mode)
	dest.uid = C.uint32_t(source.Uid)
	dest.gid = C.uint32_t(source.Gid)
	dest.file_size = C.uint32_t(source.Size)
	dest.id = *source.Id.toC()
	dest.path = C.CString(source.Path)
}

// Recv is called by Java in a loop and blocks until Go requests a callback
// be executed by the JVM. Then a request object is returned, along with a
// handle for the host to respond via RecvRes.
//export Recv
func Recv(in **C.uint8_t, inlen *C.size_t) (ref, code, handle C.int32_t) {
	recv.Lock()
	for len(recv.req) == 0 {
		recv.cond.Wait()
	}
	req := recv.req[0]
	recv.req = recv.req[1:]
	seqToBuf(in, inlen, req.in)
	recv.Unlock()

	return C.int32_t(req.ref.Num), C.int32_t(req.code), C.int32_t(req.handle)
}

// NewOutputStream initializes a new output stream.
func NewOutputStream(id DeviceID, bufferSize int64, latency int64) (stream *Stream, err error) {
	var str *C.PmStream
	errCode := C.Pm_OpenOutput(
		(*unsafe.Pointer)(unsafe.Pointer(&str)),
		C.PmDeviceID(id), nil, C.int32_t(bufferSize), nil, nil, C.int32_t(latency))
	if errCode != 0 {
		return nil, convertToError(errCode)
	}
	if info := Info(id); !info.IsOutputAvailable {
		return nil, ErrOutputUnavailable
	}
	return &Stream{deviceID: id, pmStream: str}, nil
}

func (d *DataWriterIMP) addInvertedDoc(inverter Inverter, docId int32) error {
	return clownfish.TrapErr(func() {
		self := (*C.lucy_DataWriter)(clownfish.Unwrap(d, "d"))
		inverterCF := (*C.lucy_Inverter)(clownfish.Unwrap(inverter, "inverter"))
		C.LUCY_DataWriter_Add_Inverted_Doc(self, inverterCF, C.int32_t(docId))
	})
}

func CreateCloneParams(filename string, args []string, env *[]string, cwd *string, suid int, stdhandles StdHandles) (*CloneParams, error) {
	result := &CloneParams{}
	var err error
	result.CommReader, result.CommWriter, err = os.Pipe()
	if err != nil {
		return nil, err
	}
	result.tls = tools.AlignedBuffer(4096, 16)
	result.stack = tools.AlignedBuffer(4096, 16)
	result.repr.tls = (*C.char)(unsafe.Pointer(&result.tls[0]))
	result.repr.stack = (*C.char)(unsafe.Pointer(&result.stack[len(result.stack)-1]))
	result.repr.commfd = C.int32_t(result.CommWriter.Fd())

	result.repr.filename = C.CString(filename)
	if cwd != nil {
		result.repr.cwd = C.CString(*cwd)
	}
	if args != nil {
		result.args = stringsToCchars(args)
		result.repr.argv = &result.args[0]
	}
	if env != nil {
		result.env = stringsToCchars(*env)
		result.repr.envp = &result.env[0]
	}
	result.repr.suid = C.uint32_t(suid)
	result.stdhandles = stdhandles

	result.repr.stdhandles[0] = getFd(result.stdhandles.StdIn)
	result.repr.stdhandles[1] = getFd(result.stdhandles.StdOut)
	result.repr.stdhandles[2] = getFd(result.stdhandles.StdErr)

	runtime.SetFinalizer(result, freeCloneParams)
	return result, nil
}

// Serializes a message to OSC wire format.
// If a unsupported type is encountered, serialization
// will be stopped.
func Serialize(m *Message) ([]byte, error) {
	msg := C.lo_message_new()
	for i, param := range m.Params {
		switch x := param.(type) {
		case int32:
			C.lo_message_add_int32(msg, C.int32_t(x))
		case int64:
			C.lo_message_add_int64(msg, C.int64_t(x))
		case float32:
			C.lo_message_add_float(msg, C.float(x))
		case float64:
			C.lo_message_add_double(msg, C.double(x))
		case string:
			cstr := C.CString(x)
			defer C.free(unsafe.Pointer(cstr))
			C.lo_message_add_string(msg, cstr)
		default:
			return nil, fmt.Errorf("Parameter %d has invalid type", i)
		}
	}

	cpath := C.CString(m.Path)
	defer C.free(unsafe.Pointer(cpath))
	var size int

	tmpbuffer := C.lo_message_serialise(msg, cpath, unsafe.Pointer(nil), (*C.size_t)(unsafe.Pointer((&size))))
	defer C.free(unsafe.Pointer(tmpbuffer))
	longbuffer := C.GoBytes(tmpbuffer, C.int(size))

	shortbuffer := make([]byte, size)
	copy(shortbuffer, longbuffer)
	return shortbuffer, nil
}