General: Initial Setup for Single Core.

src/core/cpu_manager.h

@@ -30,6 +30,10 @@ public:
     CpuManager& operator=(const CpuManager&) = delete;
     CpuManager& operator=(CpuManager&&) = delete;
 
+    /// Sets if emulation is multicore or single core, must be set before Initialize
+    void SetMulticore(bool is_multicore) {
+        this->is_multicore = is_multicore;
+    }
     void Initialize();
     void Shutdown();
 
@@ -40,21 +44,34 @@ public:
     std::function<void(void*)> GetSuspendThreadStartFunc();
     void* GetStartFuncParamater();
 
+    std::size_t CurrentCore() const {
+        return current_core;
+    }
+
 private:
     static void GuestThreadFunction(void* cpu_manager);
     static void GuestRewindFunction(void* cpu_manager);
     static void IdleThreadFunction(void* cpu_manager);
     static void SuspendThreadFunction(void* cpu_manager);
 
-    void RunGuestThread();
-    void RunGuestLoop();
-    void RunIdleThread();
-    void RunSuspendThread();
+    void MultiCoreRunGuestThread();
+    void MultiCoreRunGuestLoop();
+    void MultiCoreRunIdleThread();
+    void MultiCoreRunSuspendThread();
+    void MultiCorePause(bool paused);
+
+    void SingleCoreRunGuestThread();
+    void SingleCoreRunGuestLoop();
+    void SingleCoreRunIdleThread();
+    void SingleCoreRunSuspendThread();
+    void SingleCorePause(bool paused);
 
     static void ThreadStart(CpuManager& cpu_manager, std::size_t core);
 
     void RunThread(std::size_t core);
 
+    void PreemptSingleCore();
+
     struct CoreData {
         std::shared_ptr<Common::Fiber> host_context;
         std::unique_ptr<Common::Event> enter_barrier;
@@ -70,6 +87,11 @@ private:
 
     std::array<CoreData, Core::Hardware::NUM_CPU_CORES> core_data{};
 
+    bool is_multicore{};
+    std::size_t current_core{};
+    std::size_t preemption_count{};
+    static constexpr std::size_t max_cycle_runs = 5;
+
     System& system;
 };