client cancel() w/ tryCall()

Fail soft if worker thread has already stopped.
2021-04-16 18:57:25 -07:00
parent 1e08b6faf0
commit 8555bb63ef
3 changed files with 5 additions and 5 deletions
@@ -187,8 +187,8 @@ struct SubscriptionImpl : public OperationBase, public Subscription

    virtual bool cancel() override final {
        decltype (event) junk;
-        bool ret;
-        loop.call([this, &junk, &ret](){
+        bool ret = false;
+        (void)loop.tryCall([this, &junk, &ret](){
            ret = _cancel(false);
            junk = std::move(event);
            // leave opByIOID for GC