DSPEmulator: Extract UnpauseAndUnlock from PauseAndLock

Replace call to PauseAndLock(do_lock=false) with new function
UnpauseAndUnlock.

Source/Core/Core/Core.cpp

@@ -798,7 +798,7 @@ static void RestoreStateAndUnlock(Core::System& system, const bool unpause_on_un
   if (!IsRunning(system))
     return;
 
-  system.GetDSP().GetDSPEmulator()->PauseAndLock(false);
+  system.GetDSP().GetDSPEmulator()->UnpauseAndUnlock();
   ResetRumble();
 
   // CPU is unlocked last because CPU::RestoreStateAndUnlock contains the synchronization mechanism

Source/Core/Core/DSPEmulator.h

@@ -23,6 +23,7 @@ public:
 
   virtual void DoState(PointerWrap& p) = 0;
   virtual void PauseAndLock(bool do_lock) = 0;
+  virtual void UnpauseAndUnlock() = 0;
 
   virtual void DSP_WriteMailBoxHigh(bool cpu_mailbox, u16 value) = 0;
   virtual void DSP_WriteMailBoxLow(bool cpu_mailbox, u16 value) = 0;

Source/Core/Core/HW/DSPHLE/DSPHLE.cpp

@@ -245,4 +245,8 @@ u16 DSPHLE::DSP_ReadControlRegister()
 void DSPHLE::PauseAndLock(bool do_lock)
 {
 }
+
+void DSPHLE::UnpauseAndUnlock()
+{
+}
 }  // namespace DSP::HLE

Source/Core/Core/HW/DSPHLE/DSPHLE.h

@@ -35,6 +35,7 @@ public:
   bool IsLLE() const override { return false; }
   void DoState(PointerWrap& p) override;
   void PauseAndLock(bool do_lock) override;
+  void UnpauseAndUnlock() override;
 
   void DSP_WriteMailBoxHigh(bool cpu_mailbox, u16 value) override;
   void DSP_WriteMailBoxLow(bool cpu_mailbox, u16 value) override;

Source/Core/Core/HW/DSPLLE/DSPLLE.cpp

@@ -305,4 +305,16 @@ void DSPLLE::PauseAndLock(bool do_lock)
     }
   }
 }
+
+void DSPLLE::UnpauseAndUnlock()
+{
+  m_dsp_thread_mutex.unlock();
+
+  if (m_is_dsp_on_thread)
+  {
+    // Signal the DSP thread so it can perform any outstanding work now (if any)
+    m_ppc_event.Wait();
+    m_dsp_event.Set();
+  }
+}
 }  // namespace DSP::LLE

Source/Core/Core/HW/DSPLLE/DSPLLE.h

@@ -27,6 +27,7 @@ public:
   bool IsLLE() const override { return true; }
   void DoState(PointerWrap& p) override;
   void PauseAndLock(bool do_lock) override;
+  void UnpauseAndUnlock() override;
 
   void DSP_WriteMailBoxHigh(bool cpu_mailbox, u16 value) override;
   void DSP_WriteMailBoxLow(bool cpu_mailbox, u16 value) override;