/
wconn.go
99 lines (86 loc) · 2.86 KB
/
wconn.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package rgrpc
import (
"net"
"sync"
"time"
)
// cconn is a net.Conn except it reports when the connection has
// been closed.
type cconn struct {
done chan struct{}
conn net.Conn
once *sync.Once
}
func newCcon(c net.Conn) *cconn {
return &cconn{
done: make(chan struct{}),
conn: c,
once: &sync.Once{},
}
}
func (c *cconn) Done() <-chan struct{} {
return c.done
}
// Read reads data from the connection.
// Read can be made to time out and return an Error with Timeout() == true
// after a fixed time limit; see SetDeadline and SetReadDeadline.
func (c *cconn) Read(b []byte) (n int, err error) {
return c.conn.Read(b)
}
// Write writes data to the connection.
// Write can be made to time out and return an Error with Timeout() == true
// after a fixed time limit; see SetDeadline and SetWriteDeadline.
func (c *cconn) Write(b []byte) (n int, err error) {
return c.conn.Write(b)
}
// Close closes the connection.
// Any blocked Read or Write operations will be unblocked and return errors.
func (c *cconn) Close() error {
c.once.Do(func() {
close(c.done)
})
return c.conn.Close()
}
// LocalAddr returns the local network address.
func (c *cconn) LocalAddr() net.Addr {
return c.conn.LocalAddr()
}
// RemoteAddr returns the remote network address.
func (c *cconn) RemoteAddr() net.Addr {
return c.conn.RemoteAddr()
}
// SetDeadline sets the read and write deadlines associated
// with the connection. It is equivalent to calling both
// SetReadDeadline and SetWriteDeadline.
//
// A deadline is an absolute time after which I/O operations
// fail with a timeout (see type Error) instead of
// blocking. The deadline applies to all future and pending
// I/O, not just the immediately following call to Read or
// Write. After a deadline has been exceeded, the connection
// can be refreshed by setting a deadline in the future.
//
// An idle timeout can be implemented by repeatedly extending
// the deadline after successful Read or Write calls.
//
// A zero value for t means I/O operations will not time out.
func (c *cconn) SetDeadline(t time.Time) error {
return c.conn.SetDeadline(t)
}
// SetReadDeadline sets the deadline for future Read calls
// and any currently-blocked Read call.
// A zero value for t means Read will not time out.
func (c *cconn) SetReadDeadline(t time.Time) error {
return c.conn.SetReadDeadline(t)
}
// SetWriteDeadline sets the deadline for future Write calls
// and any currently-blocked Write call.
// Even if write times out, it may return n > 0, indicating that
// some of the data was successfully written.
// A zero value for t means Write will not time out.
func (c *cconn) SetWriteDeadline(t time.Time) error {
return c.conn.SetWriteDeadline(t)
}