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e3c684777a
The general policy for the current state of js/wasm is that it only has to support tests that are also supported by nacl. The test nilptr3.go makes assumptions about which nil checks can be removed. Since WebAssembly does not signal on reading a null pointer, all nil checks have to be explicit. Updates #18892 Change-Id: I06a687860b8d22ae26b1c391499c0f5183e4c485 Reviewed-on: https://go-review.googlesource.com/110096 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
38 lines
724 B
Go
38 lines
724 B
Go
// run
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// +build !js
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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"runtime"
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"sync/atomic"
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"time"
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)
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var a uint64 = 0
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func main() {
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runtime.GOMAXPROCS(2) // With just 1, infinite loop never yields
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go func() {
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for {
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atomic.AddUint64(&a, uint64(1))
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}
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}()
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time.Sleep(10 * time.Millisecond) // Short sleep is enough in passing case
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i, val := 0, atomic.LoadUint64(&a)
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for ; val == 0 && i < 100; val, i = atomic.LoadUint64(&a), i+1 {
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time.Sleep(100 * time.Millisecond)
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}
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if val == 0 {
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fmt.Printf("Failed to observe atomic increment after %d tries\n", i)
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}
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}
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