forked from cerc-io/plugeth
event: fixed subscribtions to stopped event mux
This fixes an issue where the following would lead to a panic due to a channel being closed twice: * Start mux * Stop mux * Sub to mux * Unsub This is fixed by setting the subscriptions status to closed resulting in the Unsubscribe to ignore the request when called.
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@ -66,6 +66,9 @@ func (mux *TypeMux) Subscribe(types ...interface{}) Subscription {
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mux.mutex.Lock()
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defer mux.mutex.Unlock()
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if mux.stopped {
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// set the status to closed so that calling Unsubscribe after this
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// call will short curuit
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sub.closed = true
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close(sub.postC)
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} else {
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if mux.subm == nil {
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@ -25,6 +25,14 @@ import (
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type testEvent int
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func TestSubCloseUnsub(t *testing.T) {
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// the point of this test is **not** to panic
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var mux TypeMux
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mux.Stop()
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sub := mux.Subscribe(int(0))
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sub.Unsubscribe()
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}
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func TestSub(t *testing.T) {
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mux := new(TypeMux)
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defer mux.Stop()
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