/*
 * Copyright (c) 2020 ETH Zürich, Educational Development and Technology (LET)
 * 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

using System;
using System.Runtime.InteropServices;
using SafeExamBrowser.WindowsApi.Constants;
using SafeExamBrowser.WindowsApi.Types;

namespace SafeExamBrowser.WindowsApi
{
	/// <summary>
	/// Provides access to the native Windows API exposed by <c>kernel32.dll</c>.
	/// </summary>
	internal class Kernel32
	{
		[DllImport("kernel32.dll", SetLastError = true)]
		internal static extern bool CloseHandle(IntPtr hObject);

		[DllImport("kernel32.dll", SetLastError = true)]
		internal static extern bool CreateProcess(
			string lpApplicationName,
			string lpCommandLine,
			IntPtr lpProcessAttributes,
			IntPtr lpThreadAttributes,
			bool bInheritHandles,
			int dwCreationFlags,
			IntPtr lpEnvironment,
			string lpCurrentDirectory,
			ref STARTUPINFO lpStartupInfo,
			ref PROCESS_INFORMATION lpProcessInformation);

		[DllImport("kernel32.dll", SetLastError = true)]
		internal static extern int GetCurrentThreadId();

		[DllImport("kernel32.dll", SetLastError = true)]
		internal static extern IntPtr GetModuleHandle(string lpModuleName);

		[DllImport("kernel32.dll", SetLastError = true)]
		internal static extern IntPtr OpenThread(ThreadAccess dwDesiredAccess, bool bInheritHandle, uint dwThreadId);

		[DllImport("kernel32.dll", SetLastError = true)]
		internal static extern int ResumeThread(IntPtr hThread);

		[DllImport("kernel32.dll", SetLastError = true)]
		internal static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);

		[DllImport("kernel32.dll", SetLastError = true)]
		internal static extern int SuspendThread(IntPtr hThread);
	}
}
