Introduce PowerDisplay

src/modules/powerdisplay/PowerDisplayModuleInterface/PowerDisplayProcessManager.h

@@ -0,0 +1,75 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#pragma once
+
+#include <functional>
+#include <memory>
+#include <atlfile.h>
+#include <common/utils/OnThreadExecutor.h>
+
+/// <summary>
+/// Manages PowerDisplay.exe process lifecycle and bidirectional IPC communication
+/// </summary>
+class PowerDisplayProcessManager
+{
+private:
+    HANDLE m_hProcess = nullptr;
+    std::unique_ptr<CAtlFile> m_write_pipe;  // Write to PowerDisplay (OUT)
+    OnThreadExecutor m_thread_executor;
+    bool m_enabled = false;
+
+    // Pipe name for this session
+    std::wstring m_pipe_name_out;
+
+public:
+    PowerDisplayProcessManager() = default;
+    ~PowerDisplayProcessManager();
+
+    /// <summary>
+    /// Start PowerDisplay.exe process
+    /// </summary>
+    void start();
+
+    /// <summary>
+    /// Stop PowerDisplay.exe process
+    /// </summary>
+    void stop();
+
+    /// <summary>
+    /// Send message to PowerDisplay.exe
+    /// </summary>
+    void send_message_to_powerdisplay(const std::wstring& message);
+
+private:
+    /// <summary>
+    /// Submit task to thread executor
+    /// </summary>
+    void submit_task(std::function<void()> task);
+
+    /// <summary>
+    /// Check if PowerDisplay.exe is running
+    /// </summary>
+    bool is_process_running() const;
+
+    /// <summary>
+    /// Terminate PowerDisplay.exe process
+    /// </summary>
+    void terminate_process();
+
+    /// <summary>
+    /// Start PowerDisplay.exe with command line arguments
+    /// </summary>
+    HRESULT start_process(const std::wstring& pipe_uuid);
+
+    /// <summary>
+    /// Create named pipe for sending commands to PowerDisplay
+    /// </summary>
+    HRESULT start_command_pipe(const std::wstring& pipe_uuid);
+
+    /// <summary>
+    /// Refresh - start or stop process based on m_enabled state
+    /// </summary>
+    void refresh();
+};