Golang rados_release_write_op Examples

Example #1

File: ioctx.go Project: mittalms/go-ceph

// Remove the specified `keys` from the omap `oid`
func (ioctx *IOContext) RmOmapKeys(oid string, keys []string) error {
	c_oid := C.CString(oid)
	defer C.free(unsafe.Pointer(c_oid))

	var c *C.char
	ptrSize := unsafe.Sizeof(c)

	c_keys := C.malloc(C.size_t(len(keys)) * C.size_t(ptrSize))
	defer C.free(unsafe.Pointer(c_keys))

	i := 0
	for _, key := range keys {
		c_key_ptr := (**C.char)(unsafe.Pointer(uintptr(c_keys) + uintptr(i)*ptrSize))
		*c_key_ptr = C.CString(key)
		defer C.free(unsafe.Pointer(*c_key_ptr))
		i++
	}

	op := C.rados_create_write_op()
	C.rados_write_op_omap_rm_keys(
		op,
		(**C.char)(c_keys),
		C.size_t(len(keys)))

	ret := C.rados_write_op_operate(op, ioctx.ioctx, c_oid, nil, 0)
	C.rados_release_write_op(op)

	return GetRadosError(ret)
}

Example #2

File: ioctx.go Project: hustcat/go-ceph

// Append the map `pairs` to the omap `oid`
func (ioctx *IOContext) SetOmap(oid string, pairs map[string][]byte) error {
	c_oid := C.CString(oid)
	defer C.free(unsafe.Pointer(c_oid))

	var s C.size_t
	var c *C.char
	ptrSize := unsafe.Sizeof(c)

	c_keys := C.malloc(C.size_t(len(pairs)) * C.size_t(ptrSize))
	c_values := C.malloc(C.size_t(len(pairs)) * C.size_t(ptrSize))
	c_lengths := C.malloc(C.size_t(len(pairs)) * C.size_t(unsafe.Sizeof(s)))

	defer C.free(unsafe.Pointer(c_keys))
	defer C.free(unsafe.Pointer(c_values))
	defer C.free(unsafe.Pointer(c_lengths))

	i := 0
	for key, value := range pairs {
		// key
		c_key_ptr := (**C.char)(unsafe.Pointer(uintptr(c_keys) + uintptr(i)*ptrSize))
		*c_key_ptr = C.CString(key)
		defer C.free(unsafe.Pointer(*c_key_ptr))

		// value and its length
		c_value_ptr := (**C.char)(unsafe.Pointer(uintptr(c_values) + uintptr(i)*ptrSize))

		var c_length C.size_t
		if len(value) > 0 {
			*c_value_ptr = (*C.char)(unsafe.Pointer(&value[0]))
			c_length = C.size_t(len(value))
		} else {
			*c_value_ptr = nil
			c_length = C.size_t(0)
		}

		c_length_ptr := (*C.size_t)(unsafe.Pointer(uintptr(c_lengths) + uintptr(i)*ptrSize))
		*c_length_ptr = c_length

		i++
	}

	op := C.rados_create_write_op()
	C.rados_write_op_omap_set(
		op,
		(**C.char)(c_keys),
		(**C.char)(c_values),
		(*C.size_t)(c_lengths),
		C.size_t(len(pairs)))

	ret := C.rados_write_op_operate(op, ioctx.ioctx, c_oid, nil, 0)
	C.rados_release_write_op(op)

	if ret == 0 {
		return nil
	} else {
		return RadosError(int(ret))
	}
}

Example #3

File: ioctx.go Project: mittalms/go-ceph

// Clear the omap `oid`
func (ioctx *IOContext) CleanOmap(oid string) error {
	c_oid := C.CString(oid)
	defer C.free(unsafe.Pointer(c_oid))

	op := C.rados_create_write_op()
	C.rados_write_op_omap_clear(op)

	ret := C.rados_write_op_operate(op, ioctx.ioctx, c_oid, nil, 0)
	C.rados_release_write_op(op)

	return GetRadosError(ret)
}

Example #4

File: ioctx_atomic.go Project: ITooLabs/go-ceph

func (ioctx *IOContext) WriteTaggedFull(oid string, tagName string, tag string, newTag string, data []byte) error {
	c_oid := C.CString(oid)
	c_tagName := C.CString(tagName)
	defer C.free(unsafe.Pointer(c_oid))
	defer C.free(unsafe.Pointer(c_tagName))

	b_tag := []byte(tag)
	b_newTag := []byte(newTag)

	op := C.rados_create_write_op()

	if tag == "" || tag == "0" {
		C.rados_write_op_create(
			op,
			LIBRADOS_CREATE_EXCLUSIVE,
			nil)
	} else {
		C.rados_write_op_cmpxattr(
			op,
			c_tagName,
			LIBRADOS_CMPXATTR_OP_EQ,
			(*C.char)(unsafe.Pointer(&b_tag[0])),
			(C.size_t)(len(b_tag)))
	}

	C.rados_write_op_write_full(
		op,
		(*C.char)(unsafe.Pointer(&data[0])),
		(C.size_t)(len(data)))

	C.rados_write_op_setxattr(
		op,
		c_tagName,
		(*C.char)(unsafe.Pointer(&b_newTag[0])),
		(C.size_t)(len(b_newTag)))

	ret := C.rados_write_op_operate(op, ioctx.ioctx, c_oid, nil, 0)

	C.rados_release_write_op(op)

	return GetRadosError(ret)
}

Example #5

File: write-operation.go Project: objStorage/grados

func (wo *WriteOperation) Release() {
	C.rados_release_write_op(wo.opContext)
}