diff options
Diffstat (limited to 'libgo/go/runtime/sema_test.go')
| -rw-r--r-- | libgo/go/runtime/sema_test.go | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/libgo/go/runtime/sema_test.go b/libgo/go/runtime/sema_test.go index 8bd5d4c..cf3de0a 100644 --- a/libgo/go/runtime/sema_test.go +++ b/libgo/go/runtime/sema_test.go @@ -6,6 +6,7 @@ package runtime_test import ( . "runtime" + "sync" "sync/atomic" "testing" ) @@ -61,8 +62,11 @@ func testSemaHandoff() bool { // to another goroutine. Stop the current goroutine from migrating to // another CPU where it can win the race (and appear to have not yielded) by // keeping the CPUs slightly busy. + var wg sync.WaitGroup for i := 0; i < GOMAXPROCS(-1); i++ { + wg.Add(1) go func() { + defer wg.Done() for { select { case <-done: @@ -74,7 +78,9 @@ func testSemaHandoff() bool { }() } + wg.Add(1) go func() { + defer wg.Done() Semacquire(&sema) atomic.CompareAndSwapUint32(&res, 0, 1) @@ -91,7 +97,7 @@ func testSemaHandoff() bool { Semrelease1(&sema, true, 0) atomic.CompareAndSwapUint32(&res, 0, 2) - <-done // wait for goroutines to finish to avoid data races + wg.Wait() // wait for goroutines to finish to avoid data races return res == 1 // did the waiter run first? } |