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conn_closer.go
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/
conn_closer.go
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// Copyright (c) 2023 Paweł Gaczyński
//
// 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 gain
import (
"os"
"syscall"
"github.com/pawelgaczynski/gain/pkg/errors"
"github.com/pawelgaczynski/giouring"
"github.com/rs/zerolog"
)
type connCloser struct {
ring *giouring.Ring
logger zerolog.Logger
}
func (c *connCloser) addCloseRequest(fd int) (*giouring.SubmissionQueueEntry, error) {
entry := c.ring.GetSQE()
if entry == nil {
return nil, errors.ErrGettingSQE
}
entry.PrepareClose(fd)
entry.UserData = closeConnFlag | uint64(fd)
return entry, nil
}
func (c *connCloser) addCloseConnRequest(conn *connection) error {
_, err := c.addCloseRequest(conn.fd)
if err != nil {
return err
}
conn.state = connClose
return nil
}
func (c *connCloser) syscallCloseSocket(fileDescriptor int) error {
return os.NewSyscallError("shutdown", syscall.Shutdown(fileDescriptor, syscall.SHUT_RDWR))
}
func newConnCloser(ring *giouring.Ring, logger zerolog.Logger) *connCloser {
return &connCloser{
ring: ring,
logger: logger,
}
}