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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /src/internal/poll/sendfile_solaris.go | |
parent | Initial commit. (diff) | |
download | golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/internal/poll/sendfile_solaris.go')
-rw-r--r-- | src/internal/poll/sendfile_solaris.go | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/internal/poll/sendfile_solaris.go b/src/internal/poll/sendfile_solaris.go new file mode 100644 index 0000000..7ae18f4 --- /dev/null +++ b/src/internal/poll/sendfile_solaris.go @@ -0,0 +1,66 @@ +// Copyright 2015 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 poll + +import "syscall" + +// Not strictly needed, but very helpful for debugging, see issue #10221. +// +//go:cgo_import_dynamic _ _ "libsendfile.so" +//go:cgo_import_dynamic _ _ "libsocket.so" + +// maxSendfileSize is the largest chunk size we ask the kernel to copy +// at a time. +const maxSendfileSize int = 4 << 20 + +// SendFile wraps the sendfile system call. +func SendFile(dstFD *FD, src int, pos, remain int64) (int64, error) { + if err := dstFD.writeLock(); err != nil { + return 0, err + } + defer dstFD.writeUnlock() + if err := dstFD.pd.prepareWrite(dstFD.isFile); err != nil { + return 0, err + } + + dst := dstFD.Sysfd + var written int64 + var err error + for remain > 0 { + n := maxSendfileSize + if int64(n) > remain { + n = int(remain) + } + pos1 := pos + n, err1 := syscall.Sendfile(dst, src, &pos1, n) + if err1 == syscall.EAGAIN || err1 == syscall.EINTR { + // partial write may have occurred + n = int(pos1 - pos) + } + if n > 0 { + pos += int64(n) + written += int64(n) + remain -= int64(n) + } else if n == 0 && err1 == nil { + break + } + if err1 == syscall.EAGAIN { + if err1 = dstFD.pd.waitWrite(dstFD.isFile); err1 == nil { + continue + } + } + if err1 == syscall.EINTR { + continue + } + if err1 != nil { + // This includes syscall.ENOSYS (no kernel + // support) and syscall.EINVAL (fd types which + // don't implement sendfile) + err = err1 + break + } + } + return written, err +} |