Mercurial > hg > CbC > CbC_gcc
view libgo/go/net/sendfile_windows.go @ 138:fc828634a951
merge
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Thu, 08 Nov 2018 14:17:14 +0900 |
parents | 04ced10e8804 |
children | 1830386684a0 |
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// 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. package net import ( "internal/poll" "io" "os" "syscall" ) // sendFile copies the contents of r to c using the TransmitFile // system call to minimize copies. // // if handled == true, sendFile returns the number of bytes copied and any // non-EOF error. // // if handled == false, sendFile performed no work. // // Note that sendfile for windows does not support >2GB file. func sendFile(fd *netFD, r io.Reader) (written int64, err error, handled bool) { var n int64 = 0 // by default, copy until EOF lr, ok := r.(*io.LimitedReader) if ok { n, r = lr.N, lr.R if n <= 0 { return 0, nil, true } } f, ok := r.(*os.File) if !ok { return 0, nil, false } done, err := poll.SendFile(&fd.pfd, syscall.Handle(f.Fd()), n) if err != nil { return 0, wrapSyscallError("transmitfile", err), false } if lr != nil { lr.N -= int64(done) } return int64(done), nil, true }