Service/DSP: implement semaphore event

src/core/hle/kernel/wait_object.cpp

@@ -86,10 +86,17 @@ void WaitObject::WakeupAllWaitingThreads() {
 
         thread->ResumeFromWait();
     }
+
+    if (hle_notifier)
+        hle_notifier();
 }
 
 const std::vector<SharedPtr<Thread>>& WaitObject::GetWaitingThreads() const {
     return waiting_threads;
 }
 
+void WaitObject::SetHLENotifier(std::function<void()> callback) {
+    hle_notifier = callback;
+}
+
 } // namespace Kernel

src/core/hle/kernel/wait_object.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <functional>
 #include <vector>
 #include <boost/smart_ptr/intrusive_ptr.hpp>
 #include "common/common_types.h"
@@ -52,9 +53,15 @@ public:
     /// Get a const reference to the waiting threads list for debug use
     const std::vector<SharedPtr<Thread>>& GetWaitingThreads() const;
 
+    /// Sets a callback which is called when the object becomes available
+    void SetHLENotifier(std::function<void()> callback);
+
 private:
     /// Threads waiting for this object to become available
     std::vector<SharedPtr<Thread>> waiting_threads;
+
+    /// Function to call when this object becomes available
+    std::function<void()> hle_notifier;
 };
 
 // Specialization of DynamicObjectCast for WaitObjects