From e31425df3877636c098ec7426ebd2067920715cb Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Mon, 24 Feb 2020 22:04:12 -0400
Subject: General: Recover Prometheus project from harddrive failure

This commit: Implements CPU Interrupts, Replaces Cycle Timing for Host
Timing, Reworks the Kernel's Scheduler, Introduce Idle State and
Suspended State, Recreates the bootmanager, Initializes Multicore
system.
---
 src/core/cpu_manager.h | 49 +++++++++++++++++++++++++++++++++++++------------
 1 file changed, 37 insertions(+), 12 deletions(-)

(limited to 'src/core/cpu_manager.h')

diff --git a/src/core/cpu_manager.h b/src/core/cpu_manager.h
index 97554d1bb..8103ae857 100644
--- a/src/core/cpu_manager.h
+++ b/src/core/cpu_manager.h
@@ -5,12 +5,18 @@
 #pragma once
 
 #include <array>
+#include <functional>
 #include <memory>
+#include <thread>
 #include "core/hardware_properties.h"
 
+namespace Common {
+class Event;
+class Fiber;
+} // namespace Common
+
 namespace Core {
 
-class CoreManager;
 class System;
 
 class CpuManager {
@@ -27,21 +33,40 @@ public:
     void Initialize();
     void Shutdown();
 
-    CoreManager& GetCoreManager(std::size_t index);
-    const CoreManager& GetCoreManager(std::size_t index) const;
+    void Pause(bool paused);
+
+    std::function<void(void*)> GetGuestThreadStartFunc();
+    std::function<void(void*)> GetIdleThreadStartFunc();
+    std::function<void(void*)> GetSuspendThreadStartFunc();
+    void* GetStartFuncParamater();
 
-    CoreManager& GetCurrentCoreManager();
-    const CoreManager& GetCurrentCoreManager() const;
+private:
+    static void GuestThreadFunction(void* cpu_manager);
+    static void IdleThreadFunction(void* cpu_manager);
+    static void SuspendThreadFunction(void* cpu_manager);
 
-    std::size_t GetActiveCoreIndex() const {
-        return active_core;
-    }
+    void RunGuestThread();
+    void RunIdleThread();
+    void RunSuspendThread();
 
-    void RunLoop(bool tight_loop);
+    static void ThreadStart(CpuManager& cpu_manager, std::size_t core);
 
-private:
-    std::array<std::unique_ptr<CoreManager>, Hardware::NUM_CPU_CORES> core_managers;
-    std::size_t active_core{}; ///< Active core, only used in single thread mode
+    void RunThread(std::size_t core);
+
+    struct CoreData {
+        std::shared_ptr<Common::Fiber> host_context;
+        std::unique_ptr<Common::Event> enter_barrier;
+        std::unique_ptr<Common::Event> exit_barrier;
+        std::atomic<bool> is_running;
+        std::atomic<bool> is_paused;
+        std::atomic<bool> initialized;
+        std::unique_ptr<std::thread> host_thread;
+    };
+
+    std::atomic<bool> running_mode{};
+    std::atomic<bool> paused_state{};
+
+    std::array<CoreData, Core::Hardware::NUM_CPU_CORES> core_data{};
 
     System& system;
 };
-- 
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