From 09ad2ca2729c245c223e783a6a0f41394d836f2e Mon Sep 17 00:00:00 2001
From: clowwindy <clowwindy42@gmail.com>
Date: Tue, 18 Nov 2014 21:55:45 +0800
Subject: [PATCH] release memory periodically

---
 .../Controller/ShadowsocksController.cs            | 21 +++++++++++++++
 shadowsocks-csharp/Program.cs                      |  3 ++-
 shadowsocks-csharp/Util/Util.cs                    | 30 ++++++++++++++++++++++
 shadowsocks-csharp/View/MenuViewController.cs      |  3 +--
 shadowsocks-csharp/shadowsocks-csharp.csproj       |  1 +
 5 files changed, 55 insertions(+), 3 deletions(-)
 create mode 100755 shadowsocks-csharp/Util/Util.cs

diff --git a/shadowsocks-csharp/Controller/ShadowsocksController.cs b/shadowsocks-csharp/Controller/ShadowsocksController.cs
index cb6cce11..b4de4cf9 100755
--- a/shadowsocks-csharp/Controller/ShadowsocksController.cs
+++ b/shadowsocks-csharp/Controller/ShadowsocksController.cs
@@ -14,6 +14,8 @@ namespace Shadowsocks.Controller
         // manipulates UI
         // interacts with low level logic
 
+        private Thread _ramThread;
+
         private Local local;
         private PACServer pacServer;
         private Configuration _config;
@@ -58,6 +60,7 @@ namespace Shadowsocks.Controller
             }
 
             UpdateSystemProxy();
+            StartReleasingMemory();
         }
 
         public Server GetCurrentServer()
@@ -161,6 +164,8 @@ namespace Shadowsocks.Controller
             {
                 ConfigChanged(this, new EventArgs());
             }
+
+            Util.Util.ReleaseMemory();
         }
 
 
@@ -180,5 +185,21 @@ namespace Shadowsocks.Controller
         {
             UpdateSystemProxy();
         }
+
+        private void StartReleasingMemory()
+        {
+            _ramThread = new Thread(new ThreadStart(ReleaseMemory));
+            _ramThread.IsBackground = true;
+            _ramThread.Start();
+        }
+
+        private void ReleaseMemory()
+        {
+            while (true)
+            {
+                Util.Util.ReleaseMemory();
+                Thread.Sleep(30 * 1000);
+            }
+        }
     }
 }
diff --git a/shadowsocks-csharp/Program.cs b/shadowsocks-csharp/Program.cs
index abfc52a9..6b15ea9c 100755
--- a/shadowsocks-csharp/Program.cs
+++ b/shadowsocks-csharp/Program.cs
@@ -12,13 +12,13 @@ namespace Shadowsocks
 {
     static class Program
     {
-
         /// <summary>
         /// 应用程序的主入口点。
         /// </summary>
         [STAThread]
         static void Main()
         {
+            Util.Util.ReleaseMemory();
             using (Mutex mutex = new Mutex(false, "Global\\" + "71981632-A427-497F-AB91-241CD227EC1F"))
             {
                 Application.EnableVisualStyles();
@@ -41,6 +41,7 @@ namespace Shadowsocks
                 ShadowsocksController controller = new ShadowsocksController();
 
                 MenuViewController viewController = new MenuViewController(controller);
+                Util.Util.ReleaseMemory();
                 Application.Run();
             }
         }
diff --git a/shadowsocks-csharp/Util/Util.cs b/shadowsocks-csharp/Util/Util.cs
new file mode 100755
index 00000000..afb5539a
--- /dev/null
+++ b/shadowsocks-csharp/Util/Util.cs
@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace Shadowsocks.Util
+{
+    public class Util
+    {
+        public static void ReleaseMemory()
+        {
+            // release any unused pages
+            // making the numbers look good in task manager
+            // this is totally nonsense in programming
+            // but good for those users who care
+            // making them happier with their everyday life
+            // which is part of user experience
+            GC.Collect(GC.MaxGeneration);
+            GC.WaitForPendingFinalizers();
+            SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle,
+                (UIntPtr)0xFFFFFFFF, (UIntPtr)0xFFFFFFFF);
+        }
+
+        [DllImport("kernel32.dll")]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        private static extern bool SetProcessWorkingSetSize(IntPtr process,
+            UIntPtr minimumWorkingSetSize, UIntPtr maximumWorkingSetSize);
+    }
+}
diff --git a/shadowsocks-csharp/View/MenuViewController.cs b/shadowsocks-csharp/View/MenuViewController.cs
index 158edb5b..ad46cba7 100755
--- a/shadowsocks-csharp/View/MenuViewController.cs
+++ b/shadowsocks-csharp/View/MenuViewController.cs
@@ -299,8 +299,7 @@ namespace Shadowsocks.View
         void configForm_FormClosed(object sender, FormClosedEventArgs e)
         {
             configForm = null;
-            GC.Collect();
-            GC.WaitForPendingFinalizers();
+            Util.Util.ReleaseMemory();
             ShowFirstTimeBalloon();
         }
 
diff --git a/shadowsocks-csharp/shadowsocks-csharp.csproj b/shadowsocks-csharp/shadowsocks-csharp.csproj
index e9d322b2..b04eff8b 100755
--- a/shadowsocks-csharp/shadowsocks-csharp.csproj
+++ b/shadowsocks-csharp/shadowsocks-csharp.csproj
@@ -84,6 +84,7 @@
     <Compile Include="Controller\PACServer.cs" />
     <Compile Include="Model\Server.cs" />
     <Compile Include="Model\Configuration.cs" />
+    <Compile Include="Util\Util.cs" />
     <Compile Include="View\ConfigForm.cs">
       <SubType>Form</SubType>
     </Compile>