PC平台内存获取

我们通过C#的System.Runtime.InteropServices，通过kernel32.dll来获取内存信息

与非托管代码进行交互操作 - .NET Framework | Microsoft Learn

Profiling.Profiler - Unity 脚本 API

UnityEngine.Profiling.Profiler提供的一些函数在运行时调用是不会降低性能的。

修改PlatMsgManager，在里面添加一些函数和const变量，并修改GetLongFromPlatform函数

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using System.Runtime.InteropServices;
//...
	public const int UNITY_GET_LONG_AVAILABLEMEMORY = 1;//可用内存
    public const int UNITY_GET_LONG_TOTALEMEMORY = 2;//总内存
    public const int UNITY_GET_LONG_USEDMEMORY = 3;//应用运行内存
#else
//...
    public long GetLongFromPlatform(int type)
    {
        switch (type)
        {
            case UNITY_GET_LONG_AVAILABLEMEMORY:
                return (long)GetWinAvailMemory();
            case UNITY_GET_LONG_TOTALEMEMORY:
                return (long)GetWinTotalMemory();
            case UNITY_GET_LONG_USEDMEMORY:
                return GetWinUsedMemory();
        }
        return 0;
    }
#endif
//...
    [StructLayout(LayoutKind.Sequential,Pack = 1)]
    public struct MEMORYSTATUSEX
    {
        public uint dwLength;
        public uint dwMemoryLoad;
        public ulong ullTotalPhys;
        public ulong ullAvailPhys;
        public ulong ullTotalPageFile;
        public ulong ullAvailPageFile;
        public ulong ullTotalVirtual;
        public ulong ullAvailVirtual;
        public ulong ullAvailExtendedVirtual;
    }
    [DllImport("kernel32.dll")]
    protected static extern void GlobalMemoryStatus(ref MEMORYSTATUSEX lpMemoryStatus);//调用kernel32.dll中的GlobalMemoryStatus方法，extern表示引用外部非托管dll

    /// <summary>
    /// 获取Win环境可用内存
    /// </summary>
    protected ulong GetWinAvailMemory()
    {
        MEMORYSTATUSEX ms = new MEMORYSTATUSEX();
        ms.dwLength = 64;
        GlobalMemoryStatus(ref ms);
        return ms.ullAvailPhys;
    }
    /// <summary>
    /// 获取Win总内存
    /// </summary>
    protected ulong GetWinTotalMemory()
    {
        MEMORYSTATUSEX ms = new MEMORYSTATUSEX();
        ms.dwLength = 64;
        GlobalMemoryStatus(ref ms);
        return ms.ullTotalPhys;
    }
    /// <summary>
    /// 获取Win环境已用内存
    /// </summary>
    protected long GetWinUsedMemory()
    {
        return UnityEngine.Profiling.Profiler.GetTotalReservedMemoryLong();
    }

测试

在GameStart里面添加

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protected override void Awake()
    {
        base.Awake();
    	PlatMsgManager.Instance.Init();//+++
        DontDestroyOnLoad(gameObject);
        Debug.LogFormat(
            "系统总内存：{0}mb" + "\n" +
            "系统可用内存：{1}mb" + "\n" +
            "已用内存：{2}mb",
            PlatMsgManager.Instance.GetLongFromPlatform(2) / (1024.0f * 1024.0f),
            PlatMsgManager.Instance.GetLongFromPlatform(1) / (1024.0f * 1024.0f),
            PlatMsgManager.Instance.GetLongFromPlatform(3) / (1024.0f * 1024.0f));
        //...
    }

安卓平台内存获取

详情请看GameHelper一节。