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block_io.go
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/*
* Copyright 2023 CloudWeGo Authors
*
* 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 shmipc
import (
"fmt"
"io"
"syscall"
)
func blockReadFull(connFd int, data []byte) error {
readSize := 0
for readSize < len(data) {
n, err := syscall.Read(connFd, data[readSize:])
if err != nil {
return fmt.Errorf("ReadFull failed, had readSize:%d reason:%s", readSize, err.Error())
}
readSize += n
if n == 0 {
return io.EOF
}
}
return nil
}
func blockWriteFull(connFd int, data []byte) error {
written := 0
for written < len(data) {
n, err := syscall.Write(connFd, data[written:])
if err != nil {
return err
}
written += n
}
return nil
}
func sendFd(connFd int, oob []byte) error {
err := syscall.Sendmsg(connFd, nil, oob, nil, 0)
return err
}
func blockReadOutOfBoundForFd(connFd int, oob []byte) (oobn int, err error) {
_, oobn, _, _, err = syscall.Recvmsg(connFd, nil, oob, 0)
return
}