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runtime: convert aix netpollWakeSig to atomic type
Updates #53821 Change-Id: Ic073871ed2638ca22e6cb057dd8297f27582e78f Reviewed-on: https://go-review.googlesource.com/c/go/+/423877 Reviewed-by: Michael Pratt <mpratt@google.com> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com>
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@ -45,7 +45,7 @@ var (
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wrwake int32
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pendingUpdates int32
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netpollWakeSig uint32 // used to avoid duplicate calls of netpollBreak
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netpollWakeSig atomic.Uint32 // used to avoid duplicate calls of netpollBreak
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)
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func netpollinit() {
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@ -136,7 +136,7 @@ func netpollarm(pd *pollDesc, mode int) {
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// netpollBreak interrupts a poll.
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func netpollBreak() {
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// Failing to cas indicates there is an in-flight wakeup, so we're done here.
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if !atomic.Cas(&netpollWakeSig, 0, 1) {
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if !netpollWakeSig.CompareAndSwap(0, 1) {
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return
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}
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@ -196,7 +196,7 @@ retry:
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var b [1]byte
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for read(rdwake, unsafe.Pointer(&b[0]), 1) == 1 {
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}
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atomic.Store(&netpollWakeSig, 0)
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netpollWakeSig.Store(0)
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}
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// Still look at the other fds even if the mode may have
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// changed, as netpollBreak might have been called.
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