File size: 3,983 Bytes
13c2bf6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | // Copyright 2017 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_test
import (
"errors"
"internal/poll"
"internal/syscall/windows"
"io"
"os"
"path/filepath"
"syscall"
"testing"
"unsafe"
)
func init() {
poll.InitWSA()
}
func TestWSASocketConflict(t *testing.T) {
t.Parallel()
s, err := windows.WSASocket(syscall.AF_INET, syscall.SOCK_STREAM, syscall.IPPROTO_TCP, nil, 0, windows.WSA_FLAG_OVERLAPPED)
if err != nil {
t.Fatal(err)
}
fd := poll.FD{Sysfd: s, IsStream: true, ZeroReadIsEOF: true}
if err = fd.Init("tcp", true); err != nil {
syscall.CloseHandle(s)
t.Fatal(err)
}
defer fd.Close()
const SIO_TCP_INFO = syscall.IOC_INOUT | syscall.IOC_VENDOR | 39
inbuf := uint32(0)
var outbuf _TCP_INFO_v0
cbbr := uint32(0)
var ov syscall.Overlapped
// Create an event so that we can efficiently wait for completion
// of a requested overlapped I/O operation.
ov.HEvent, _ = windows.CreateEvent(nil, 0, 0, nil)
if ov.HEvent == 0 {
t.Fatalf("could not create the event!")
}
defer syscall.CloseHandle(ov.HEvent)
if err = fd.WSAIoctl(
SIO_TCP_INFO,
(*byte)(unsafe.Pointer(&inbuf)),
uint32(unsafe.Sizeof(inbuf)),
(*byte)(unsafe.Pointer(&outbuf)),
uint32(unsafe.Sizeof(outbuf)),
&cbbr,
&ov,
0,
); err != nil && !errors.Is(err, syscall.ERROR_IO_PENDING) {
t.Fatalf("could not perform the WSAIoctl: %v", err)
}
if err != nil && errors.Is(err, syscall.ERROR_IO_PENDING) {
// It is possible that the overlapped I/O operation completed
// immediately so there is no need to wait for it to complete.
if res, err := syscall.WaitForSingleObject(ov.HEvent, syscall.INFINITE); res != 0 {
t.Fatalf("waiting for the completion of the overlapped IO failed: %v", err)
}
}
}
type _TCP_INFO_v0 struct {
State uint32
Mss uint32
ConnectionTimeMs uint64
TimestampsEnabled bool
RttUs uint32
MinRttUs uint32
BytesInFlight uint32
Cwnd uint32
SndWnd uint32
RcvWnd uint32
RcvBuf uint32
BytesOut uint64
BytesIn uint64
BytesReordered uint32
BytesRetrans uint32
FastRetrans uint32
DupAcksIn uint32
TimeoutEpisodes uint32
SynRetrans uint8
}
func newFD(t testing.TB, h syscall.Handle, kind string, overlapped bool) *poll.FD {
fd := poll.FD{
Sysfd: h,
IsStream: true,
ZeroReadIsEOF: true,
}
err := fd.Init(kind, overlapped)
if overlapped && err != nil {
// Overlapped file handles should not error.
fd.Close()
t.Fatal(err)
}
t.Cleanup(func() {
fd.Close()
})
return &fd
}
func newFile(t testing.TB, name string, overlapped bool) *poll.FD {
namep, err := syscall.UTF16PtrFromString(name)
if err != nil {
t.Fatal(err)
}
flags := syscall.FILE_ATTRIBUTE_NORMAL
if overlapped {
flags |= syscall.FILE_FLAG_OVERLAPPED
}
h, err := syscall.CreateFile(namep,
syscall.GENERIC_READ|syscall.GENERIC_WRITE,
syscall.FILE_SHARE_WRITE|syscall.FILE_SHARE_READ,
nil, syscall.OPEN_ALWAYS, uint32(flags), 0)
if err != nil {
t.Fatal(err)
}
typ, err := syscall.GetFileType(h)
if err != nil {
syscall.CloseHandle(h)
t.Fatal(err)
}
kind := "file"
if typ == syscall.FILE_TYPE_PIPE {
kind = "pipe"
}
return newFD(t, h, kind, overlapped)
}
func BenchmarkReadOverlapped(b *testing.B) {
benchmarkRead(b, true)
}
func BenchmarkReadSync(b *testing.B) {
benchmarkRead(b, false)
}
func benchmarkRead(b *testing.B, overlapped bool) {
name := filepath.Join(b.TempDir(), "foo")
const content = "hello world"
err := os.WriteFile(name, []byte(content), 0644)
if err != nil {
b.Fatal(err)
}
file := newFile(b, name, overlapped)
var buf [len(content)]byte
for b.Loop() {
_, err := io.ReadFull(file, buf[:])
if err != nil {
b.Fatal(err)
}
if _, err := file.Seek(0, io.SeekStart); err != nil {
b.Fatal(err)
}
}
}
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