| 12 | ) |
| 13 | |
| 14 | func TestBasic(t *testing.T) { |
| 15 | b := make([]byte, 10000) |
| 16 | if _, err := rand.Read(b[:]); err != nil { |
| 17 | panic(err) |
| 18 | } |
| 19 | |
| 20 | fd := NewFD(1234) |
| 21 | fd.DecRef() |
| 22 | |
| 23 | var wg sync.WaitGroup |
| 24 | |
| 25 | var entries atomic.Uint64 |
| 26 | var done atomic.Bool |
| 27 | final := -1 |
| 28 | wg.Add(1) |
| 29 | go func() { |
| 30 | defer wg.Done() |
| 31 | defer t.Logf("finished close") |
| 32 | time.Sleep(30 * time.Millisecond) |
| 33 | if !fd.IncRefLockForClose() { |
| 34 | t.Fatalf("failed to incref for close") |
| 35 | } |
| 36 | defer fd.DecRef() |
| 37 | final = int(entries.Load()) |
| 38 | done.Store(true) |
| 39 | t.Logf("closing (entered=%d)", final) |
| 40 | }() |
| 41 | |
| 42 | rounds := 0 |
| 43 | for !done.Load() { |
| 44 | rounds++ |
| 45 | for i := 0; i < len(b); i++ { |
| 46 | wg.Add(1) |
| 47 | go func(i int) { |
| 48 | defer wg.Done() |
| 49 | if err := fd.IncRef(); err != nil { |
| 50 | return |
| 51 | } |
| 52 | entries.Add(1) |
| 53 | defer fd.DecRef() |
| 54 | dur := time.Duration(int(b[i])) * time.Microsecond |
| 55 | time.Sleep(dur) |
| 56 | if got := fd.FD(); got != 1234 { |
| 57 | t.Fatalf("failed: got %d, want 1234", got) |
| 58 | } |
| 59 | }(i) |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | wg.Wait() |
| 64 | |
| 65 | if got := int(entries.Load()); got != final { |
| 66 | t.Fatalf("got %d, want %d", got, final) |
| 67 | } |
| 68 | t.Logf("final: %d/%d entries", entries.Load(), rounds*len(b)) |
| 69 | } |