fix delete operator() for Event

src/ulib/concorrency/event.cpp

@@ -49,16 +49,10 @@ ulib::Event::Wait(int give_up_after_ms)
     }
 }
 
-bool
-ulib::Event::operator()() const
-{
-    return event_status_;
-}
-
 ulib::Event::IsEventSetChecker::IsEventSetChecker(const ulib::Event &event) : event_(event) {}
 
 bool
-ulib::Event::IsEventSetChecker::operator()()
+ulib::Event::IsEventSetChecker::operator()() const
 {
     return event_.event_status_;
 }

src/ulib/concorrency/event.h

@@ -23,13 +23,12 @@ public:
      * @return
      */
     bool Wait(int give_up_after_ms = -1);
-    bool operator()() const;
 
 private:
     class IsEventSetChecker {
     public:
         IsEventSetChecker(const Event &);
-        bool operator()();
+        bool operator()() const;
 
     private:
         const Event &event_;

tests/ulib/concorrency/event_test.cpp

@@ -10,7 +10,6 @@ class EventTest : public ::testing::Test {
 public:
     void SetUp() override
     {
-        EXPECT_FALSE(event_());
         EXPECT_FALSE(event_.Wait(100));
 
         consumer_count_ = 0;