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|
package matrix
import (
"bytes"
"io"
"log"
"os"
"sync"
"syscall"
"testing"
"github.com/rfjakob/gocryptfs/tests/test_helpers"
)
// https://github.com/rfjakob/gocryptfs/issues/363
//
// Note: this test calls log.Fatal() instead of t.Fatal() because apparently,
// calling t.Fatal() from a goroutine hangs the test.
func TestConcurrentReadWrite(t *testing.T) {
var wg sync.WaitGroup
fn := test_helpers.DefaultPlainDir + "/TestConcurrentReadWrite"
if f, err := os.Create(fn); err != nil {
t.Fatal(err)
} else {
f.Close()
}
buf := make([]byte, 100)
content := []byte("1234567890")
threads := 10
loops := 30
for i := 0; i < threads; i++ {
// Reader thread
wg.Add(1)
go func() {
fRd, err := os.Open(fn)
if err != nil {
log.Fatal(err)
}
for j := 0; j < loops; j++ {
n, err := fRd.ReadAt(buf, 0)
if err != nil && err != io.EOF {
log.Fatal(err)
}
if n != 0 && n != 10 {
log.Fatalf("strange read length: %d", n)
}
}
fRd.Close()
wg.Done()
}()
// Writer thread
wg.Add(1)
go func() {
fWr, err := os.OpenFile(fn, os.O_RDWR, 0700)
if err != nil {
log.Fatal(err)
}
for j := 0; j < loops; j++ {
err = fWr.Truncate(0)
if err != nil {
log.Fatal(err)
}
_, err = fWr.WriteAt(content, 0)
if err != nil {
log.Fatal(err)
}
}
fWr.Close()
wg.Done()
}()
}
wg.Wait()
}
// https://github.com/rfjakob/gocryptfs/issues/363
//
// Note: this test calls log.Fatal() instead of t.Fatal() because apparently,
// calling t.Fatal() from a goroutine hangs the test.
func TestConcurrentReadCreate(t *testing.T) {
fn := test_helpers.DefaultPlainDir + "/TestConcurrentReadCreate"
content := []byte("1234567890")
loops := 100
var wg sync.WaitGroup
// "Create()" thread
wg.Add(1)
go func() {
for i := 0; i < loops; i++ {
f, err := os.Create(fn)
if err != nil {
log.Fatal(err)
}
_, err = f.Write(content)
if err != nil {
log.Fatal(err)
}
f.Close()
syscall.Unlink(fn)
}
wg.Done()
}()
// "Reader" thread
wg.Add(1)
go func() {
buf0 := make([]byte, 100)
for i := 0; i < loops; i++ {
f, err := os.Open(fn)
if err != nil {
i++
continue
}
n, err := f.Read(buf0)
if err == io.EOF {
i++
continue
}
if err != nil {
log.Fatal(err)
}
buf := buf0[:n]
if bytes.Compare(buf, content) != 0 {
log.Fatal("content mismatch")
}
f.Close()
}
wg.Done()
}()
wg.Wait()
}
|
