| // Copyright 2011 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| // sendFile copies the contents of r to c using the sendfile |
| // system call to minimize copies. |
| // if handled == true, sendFile returns the number of bytes copied and any |
| // if handled == false, sendFile performed no work. |
| func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) { |
| var remain int64 = 1 << 62 // by default, copy until EOF |
| lr, ok := r.(*io.LimitedReader) |
| written, err = poll.SendFile(&c.pfd, int(f.Fd()), remain) |
| return written, wrapSyscallError("sendfile", err), written > 0 |