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sync: close channels atomically only once (#9645)
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@ -138,7 +138,10 @@ fn new_channel_st(n u32, st u32) &Channel {
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}
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pub fn (mut ch Channel) close() {
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C.atomic_store_u16(&ch.closed, 1)
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open_val := u16(0)
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if !C.atomic_compare_exchange_strong_u16(&ch.closed, &open_val, 1) {
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return
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}
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mut nulladr := voidptr(0)
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for !C.atomic_compare_exchange_weak_ptr(&ch.adr_written, &nulladr, voidptr(-1)) {
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nulladr = voidptr(0)
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