/
pipenet.go
66 lines (55 loc) · 1.03 KB
/
pipenet.go
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package catalog
import (
"context"
"errors"
"net"
"sync"
)
type pipeAddr struct{}
func (pipeAddr) Network() string { return "pipe" }
func (pipeAddr) String() string { return "pipe" }
type pipeNet struct {
accept chan net.Conn
closed chan struct{}
closeOnce sync.Once
}
func newPipeNet() *pipeNet {
return &pipeNet{
accept: make(chan net.Conn),
closed: make(chan struct{}),
}
}
func (n *pipeNet) Addr() net.Addr {
return pipeAddr{}
}
func (n *pipeNet) Accept() (net.Conn, error) {
select {
case s := <-n.accept:
return s, nil
case <-n.closed:
return nil, errors.New("closed")
}
}
func (n *pipeNet) DialContext(ctx context.Context, _ string) (conn net.Conn, err error) {
c, s := net.Pipe()
defer func() {
if err != nil {
c.Close()
s.Close()
}
}()
select {
case <-ctx.Done():
return nil, ctx.Err()
case n.accept <- s:
return c, nil
case <-n.closed:
return nil, errors.New("network closed")
}
}
func (n *pipeNet) Close() error {
n.closeOnce.Do(func() {
close(n.closed)
})
return nil
}