Merge pull request #1486 from bartico6/issue-1485

Add "less than 2gb ram" warning

CHANGELOG.md

@@ -10,6 +10,7 @@ This is the rolling changelog for TShock for Terraria. Use past tense when addin
 * Validated tile placement on PlaceObject; clients can no longer place frames, paintings etc with dirt blocks (@bartico6, @ProfessorXZ)
 * Updated to new stat tracking system with more data so we can actually make informed software decisions (Jordan Coulam)
 * Fixed /time display at the end of Terraria hours (@koneko-nyan)
+* Added a warning notifying users of the minimum memory required to run TShock (@bartico6)
 
 ## TShock 4.3.24
 * API: Changed `PlayerHooks` permission hook mechanisms to allow negation from hooks (@deadsurgeon42)

TShockAPI/StatTracker.cs

@@ -27,7 +27,8 @@ using System.Runtime.InteropServices;
 using System.Net.Http;
 using System.Threading.Tasks;
 using TShockAPI.Extensions;
-
+using System.IO;
+using System.Text.RegularExpressions;
 
 namespace TShockAPI
 {
@@ -177,7 +178,50 @@ namespace TShockAPI
 			return plugins;
 		}
 
-		private long GetTotalSystemRam(bool isMono)
+		/// <summary>
+		/// Returns the amount of free RAM, in megabytes.
+		/// </summary>
+		/// <param name="mono">Whether or not this program is being executed in a Mono runtime</param>
+		/// <returns>Free RAM memory amount, in megabytes</returns>
+		public long GetFreeSystemRam(bool mono)
+		{
+			if (mono)
+			{
+				//Temporary in case mono won't work
+				if (File.Exists("/proc/meminfo"))
+				{
+					var l = File.ReadAllLines("/proc/meminfo");
+					foreach (string s in l)
+					{
+						if (s.StartsWith("MemFree:"))
+						{
+							var m = Regex.Match(s, "MemFree:(\\s*)(\\d*) kB");
+							if (m.Success)
+							{
+								long val;
+								if (long.TryParse(m.Groups[2].Value, out val))
+								{
+									return val / 1024;
+								}
+							}
+						}
+					}
+				}
+				return -1;
+			}
+			else
+			{
+				var pc = new PerformanceCounter("Memory", "Available MBytes");
+				return pc.RawValue;
+			}
+		}
+
+		/// <summary>
+		/// Returns the total amount of installed RAM, in gigabytes.
+		/// </summary>
+		/// <param name="isMono">Whether or not this program is being executed in a Mono runtime</param>
+		/// <returns>Total RAM memory amount, in gigabytes</returns>
+		public long GetTotalSystemRam(bool isMono)
 		{
 			if (totalMem != 0)
 			{
@@ -267,4 +311,4 @@ namespace TShockAPI
 		/// </summary>
 		public bool mono;
 	}
-}
+}

TShockAPI/TShock.cs

@@ -329,6 +329,12 @@ namespace TShockAPI
 
 				Log.ConsoleInfo("TShock {0} ({1}) now running.", Version, VersionCodename);
 
+				var systemRam = StatTracker.GetFreeSystemRam(ServerApi.RunningMono);
+				if (systemRam > -1 && systemRam < 2048)
+				{
+					Log.ConsoleError("This machine has less than 2 gigabytes of RAM free. Be advised that it might not be enough to run TShock.");
+				}
+
 				ServerApi.Hooks.GamePostInitialize.Register(this, OnPostInit);
 				ServerApi.Hooks.GameUpdate.Register(this, OnUpdate);
 				ServerApi.Hooks.GameHardmodeTileUpdate.Register(this, OnHardUpdate);