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recorddesc.go
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recorddesc.go
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/*
Copyright 2016 Stanislav Liberman
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package rb
import (
"fmt"
"github.com/lirm/aeron-go/aeron/util"
)
var RecordDescriptor = struct {
HeaderLength int32
RecordAlignment int32
PaddingMsgTypeID int32
LengthOffset int32
TypeOffset int32
}{
util.SizeOfInt32 * 2,
util.SizeOfInt32 * 2,
-1,
0,
4,
}
func LengthOffset(recordOffset int32) int32 {
return recordOffset
}
func TypeOffset(recordOffset int32) int32 {
return recordOffset + util.SizeOfInt32
}
func EncodedMsgOffset(recordOffset int32) int32 {
return recordOffset + RecordDescriptor.HeaderLength
}
func makeHeader(length, msgTypeID int32) int64 {
return ((int64(msgTypeID) & 0xFFFFFFFF) << 32) | (int64(length) & 0xFFFFFFFF)
}
func checkMsgTypeID(msgTypeID int32) {
if msgTypeID < 1 {
panic(fmt.Sprintf("Message type id must be greater than zero, msgTypeId=%d", msgTypeID))
}
}