Finished pluginloader, plugininterface

Some fixes and error management (needs improvement) in Core and Service/Hook classes. 
"Clean Plugin Unloading on Error" finished
Some debuging messages on startup. to Fix this remove old Plugins from Pluginfolder

git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@535 b956fd51-792f-4845-bead-9b4dfca2ff2c

1 files changed, 786 insertions, 0 deletions

diff --git a/Game/Code/Classes/uPluginLoader.pas b/Game/Code/Classes/uPluginLoader.pas
index 929fd84e..fadea0c6 100644
--- a/Game/Code/Classes/uPluginLoader.pas
+++ b/Game/Code/Classes/uPluginLoader.pas
@@ -1,7 +1,793 @@
 unit uPluginLoader;

+{*********************

+  uPluginLoader

+  Unit contains to Classes

+    TPluginLoader: Class Searching for and Loading the Plugins

+    TtehPlugins:   Class that represents the Plugins in Modules chain

+*********************}

 

 interface

+uses UPluginDefs, UCoreModule;

+{$IFDEF FPC}

+  {$MODE DELPHI}
+{$ENDIF}

+

+type

+  TPluginListItem = record

+    Info: TUS_PluginInfo;

+    State: Byte; //State of this Plugin: 0 - undefined; 1 - Loaded; 2 - Inited / Running; 4 - Unloaded; 254 - Loading aborted by Plugin; 255 - Unloaded because of Error

+    Path: String; //Path to this Plugin

+    NeedsDeInit: Boolean; //If this is Inited correctly this should be true

+    hLib: THandle; //Handle of Loaded Libary

+    Procs: record //Procs offered by Plugin. Don't call this directly use wrappers of TPluginLoader

+      Load:   Func_Load;

+      Init:   Func_Init;

+      DeInit: Proc_DeInit;

+    end;

+  end;

+  {*********************

+    TPluginLoader

+    Class Searches for Plugins and Manages loading and unloading

+  *********************}

+  PPluginLoader = ^TPluginLoader;

+  TPluginLoader = class (TCoreModule)

+    private

+      LoadingProcessFinished: Boolean;

+      sUnloadPlugin:    THandle;

+      sLoadPlugin:      THandle;

+      sGetPluginInfo:   THandle;

+      sGetPluginState:  THandle;

+

+      Procedure FreePlugin(Index: Cardinal);

+    public

+      PluginInterface: TUS_PluginInterface;

+      Plugins: Array of TPluginListItem;

+

+      //TCoreModule methods to inherit

+      Constructor Create; override;

+      Procedure Info(const pInfo: PModuleInfo); override;

+      Function Load: Boolean; override;

+      Function Init: Boolean; override;

+      Procedure DeInit; override;

+      Procedure Free; override;

+

+      //New Methods

+      Procedure BrowseDir(Path: String);             //Browses the Path at _Path_ for Plugins

+      Function  PluginExists(Name: String): Integer; //If Plugin Exists: Index of Plugin, else -1

+      Procedure AddPlugin(Filename: String);//Adds Plugin to the Array

+

+      Function  CallLoad(Index: Cardinal): Integer;

+      Function  CallInit(Index: Cardinal): Integer;

+      Procedure CallDeInit(Index: Cardinal);

+

+      //Services offered

+      Function LoadPlugin(wParam, lParam: DWord): integer; //wParam PChar(PluginName/PluginPath) | lParam (if wParam = nil) ID of the Plugin

+      Function UnloadPlugin(wParam, lParam: DWord): integer; //wParam PChar(PluginName/PluginPath) | lParam (if wParam = nil) ID of the Plugin

+      Function GetPluginInfo(wParam, lParam: DWord): integer; //If wParam = -1 then (If lParam = nil then get length of Moduleinfo Array. If lparam <> nil then write array of TUS_PluginInfo to address at lparam) Else (Get PluginInfo of Plugin with Index(wParam) to Address at lParam)

+      Function GetPluginState(wParam, lParam: DWord): integer; //If wParam = -1 then (If lParam = nil then get length of Moduleinfo Array. If lparam <> nil then write array of TUS_PluginInfo to address at lparam) Else (Return PluginInfo of Plugin with Index(wParam))

+

+  end;

+

+  {*********************

+    TtehPlugins

+    Class Represents the Plugins in Module Chain.

+    It Calls the Plugins Procs and Funcs

+  *********************}

+  TtehPlugins = class (TCoreModule)

+    private

+      PluginLoader: PPluginLoader;

+    public

+      //TCoreModule methods to inherit

+      Constructor Create; override;

+      

+      Procedure Info(const pInfo: PModuleInfo); override;

+      Function Load: Boolean; override;

+      Function Init: Boolean; override;

+      Procedure DeInit; override;

+  end;

+

+const

+  {$IFDEF win32}

+  PluginFileExtension = '.dll';

+  {$ELSE} 

+  PluginFileExtension = '.so';

+  {$ENDIF}

 

 implementation

+uses UCore, UPluginInterface,

+{$IFDEF win32}

+  windows,
+{$ELSE}
+  dynlibs,
+{$ENDIF}
+UMain, SysUtils;

+

+{*********************

+  TPluginLoader

+  Implentation

+*********************}

+

+//-------------

+// Function that gives some Infos about the Module to the Core

+//-------------

+Procedure TPluginLoader.Info(const pInfo: PModuleInfo);

+begin

+  pInfo^.Name := 'TPluginLoader';

+  pInfo^.Version := MakeVersion(1,0,0,chr(0));

+  pInfo^.Description := 'Searches for Plugins, loads and unloads them';

+end;

+

+//-------------

+// Just the Constructor

+//-------------

+Constructor TPluginLoader.Create;

+begin

+  //Init PluginInterface

+  //Using Methods from UPluginInterface

+  PluginInterface.CreateHookableEvent := CreateHookableEvent;

+  PluginInterface.DestroyHookableEvent := DestroyHookableEvent;

+  PluginInterface.NotivyEventHooks := NotivyEventHooks;

+  PluginInterface.HookEvent := HookEvent;

+  PluginInterface.UnHookEvent := UnHookEvent;

+  PluginInterface.EventExists := EventExists;

+

+  PluginInterface.CreateService := CreateService;

+  PluginInterface.DestroyService := DestroyService;

+  PluginInterface.CallService := CallService;

+  PluginInterface.ServiceExists := ServiceExists;

+

+  //UnSet Private Var

+  LoadingProcessFinished := False;

+end;

+

+//-------------

+//Is Called on Loading.

+//In this Method only Events and Services should be created

+//to offer them to other Modules or Plugins during the Init process

+//If False is Returned this will cause a Forced Exit

+//-------------

+Function TPluginLoader.Load: Boolean;

+begin

+  Result := True;

+

+  Try

+    //Start Searching for Plugins

+    BrowseDir(PluginPath);

+  Except

+    Result := False;

+    Core.ReportError(Integer(PChar('Error Browsing and Loading.')), Integer(PChar('TPluginLoader')));

+  end;

+end;

+

+//-------------

+//Is Called on Init Process

+//In this Method you can Hook some Events and Create + Init

+//your Classes, Variables etc.

+//If False is Returned this will cause a Forced Exit

+//-------------

+Function TPluginLoader.Init: Boolean;

+begin

+  //Just set Prvate Var to true.

+  LoadingProcessFinished := True;

+  Result := True;

+end;

+

+//-------------

+//Is Called if this Module has been Inited and there is a Exit.

+//Deinit is in backwards Initing Order

+//-------------

+Procedure TPluginLoader.DeInit;

+var

+  I: Integer;

+begin

+  //Force DeInit

+  //If some Plugins aren't DeInited for some Reason o0

+  For I := 0 to High(Plugins) do

+  begin

+    If (Plugins[I].State < 4) then

+      FreePlugin(I);

+  end;

+

+  //Nothing to do here. Core will remove the Hooks

+end;

+

+//-------------

+//Is Called if this Module will be unloaded and has been created

+//Should be used to Free Memory

+//-------------

+Procedure TPluginLoader.Free;

+begin

+  //Just save some Memory if it wasn't done now..

+  SetLength(Plugins, 0);

+end;

+

+//--------------

+// Browses the Path at _Path_ for Plugins

+//--------------

+Procedure TPluginLoader.BrowseDir(Path: String);

+var

+  SR: TSearchRec;

+begin

+  //Search for other Dirs to Browse

+  if FindFirst(Path + '*', faDirectory, SR) = 0 then begin

+    repeat

+      if (SR.Name <> '.') and (SR.Name <> '..') then

+        BrowseDir(Path + Sr.Name + PathDelim);

+    until FindNext(SR) <> 0;

+  end;

+  FindClose(SR);

+  

+  //Search for Plugins at Path

+  if FindFirst(Path + '*' + PluginFileExtension, 0, SR) = 0 then

+  begin

+    repeat

+      AddPlugin(Path + SR.Name);

+    until FindNext(SR) <> 0;

+  end;

+  FindClose(SR);

+end;

+ 

+//--------------

+// If Plugin Exists: Index of Plugin, else -1

+//--------------

+Function  TPluginLoader.PluginExists(Name: String): Integer;

+var

+  I: Integer;

+begin

+  Result := -1;

+

+  If (Length(Name) <= 32 { =>Length(TUS_PluginInfo.Name)}) then

+  begin

+    For I := 0 to High(Plugins) do

+      if (Plugins[I].Info.Name = Name) then

+      begin //Found the Plugin

+        Result := I;

+        Break;

+      end;

+  end;

+end;

+ 

+//--------------

+// Adds Plugin to the Array

+//--------------

+Procedure TPluginLoader.AddPlugin(Filename: String);

+var

+  hLib: THandle;

+  PInfo: Proc_PluginInfo;

+  Info: TUS_PluginInfo;

+  PluginID: Integer;

+begin

+  If (FileExists(Filename)) then

+  begin //Load Libary

+    hLib := LoadLibrary(PChar(Filename));

+    If (hLib <> 0) then

+    begin //Try to get Address of the Info Proc

+      PInfo := GetProcAddress (hLib, PChar('USPlugin_Info'));

+      If (@PInfo <> nil) then

+      begin

+        Info.cbSize := SizeOf(TUS_PluginInfo);

+

+        Try //Call Info Proc

+          PInfo(@Info);

+        Except

+          Info.Name := '';

+          Core.ReportError(Integer(PChar('Error getting Plugin Info: ' + Filename)), Integer(PChar('TPluginLoader')));

+        end;

+

+        //Is Name set ?

+        If (Trim(Info.Name) <> '') then

+        begin

+          PluginID := PluginExists(Info.Name);

+

+          If (PluginID > 0) AND (Plugins[PluginID].State >=4) then

+            PluginID := -1;

+

+          If (PluginID = -1) then

+          begin

+            //Add new item to array

+            PluginID := Length(Plugins);

+            SetLength(Plugins, PluginID + 1);

+

+            //Fill with Info:

+            Plugins[PluginID].Info := Info;

+            Plugins[PluginID].State := 0;

+            Plugins[PluginID].Path := Filename;

+            Plugins[PluginID].NeedsDeInit := False;

+            Plugins[PluginID].hLib := hLib;

+

+            //Try to get Procs

+            Plugins[PluginID].Procs.Load   := GetProcAddress (hLib, PChar('USPlugin_Load'));

+            Plugins[PluginID].Procs.Init   := GetProcAddress (hLib, PChar('USPlugin_Init'));

+            Plugins[PluginID].Procs.DeInit := GetProcAddress (hLib, PChar('USPlugin_DeInit'));

+

+            If (@Plugins[PluginID].Procs.Load = nil) OR (@Plugins[PluginID].Procs.Init = nil) OR (@Plugins[PluginID].Procs.DeInit = nil) then

+            begin

+              Plugins[PluginID].State := 255;

+              FreeLibrary(hLib);

+              Core.ReportError(Integer(PChar('Can''t get Plugin Procs from Libary: "' + Info.Name + '" ' + Filename)), Integer(PChar('TPluginLoader')));

+            end;

+

+            //Emulate loading process if this Plugin is loaded to late

+            If (LoadingProcessFinished) then

+            begin

+              CallLoad(PluginID);

+              CallInit(PluginID);

+            end;

+          end

+          Else If (LoadingProcessFinished = False) then

+          begin

+            If (Plugins[PluginID].Info.Version < Info.Version) then

+            begin //Found newer Version of this Plugin

+              Core.ReportDebug(Integer(PChar('Found a newer Version of Plugin: ' + Info.Name)), Integer(PChar('TPluginLoader')));

+

+              //Unload Old Plugin

+              UnloadPlugin(Integer(nil), PluginID);

+

+              //Fill with new Info

+              Plugins[PluginID].Info := Info;

+              Plugins[PluginID].State := 0;

+              Plugins[PluginID].Path := Filename;

+              Plugins[PluginID].NeedsDeInit := False;

+              Plugins[PluginID].hLib := hLib;

+

+              //Try to get Procs

+              Plugins[PluginID].Procs.Load   := GetProcAddress (hLib, PChar('USPlugin_Load'));

+              Plugins[PluginID].Procs.Init   := GetProcAddress (hLib, PChar('USPlugin_Init'));

+              Plugins[PluginID].Procs.DeInit := GetProcAddress (hLib, PChar('USPlugin_DeInit'));

+

+              If (@Plugins[PluginID].Procs.Load = nil) OR (@Plugins[PluginID].Procs.Init = nil) OR (@Plugins[PluginID].Procs.DeInit = nil) then

+              begin

+                FreeLibrary(hLib);

+                Plugins[PluginID].State := 255;

+                Core.ReportError(Integer(PChar('Can''t get Plugin Procs from Libary: "' + Info.Name + '" ' + Filename)), Integer(PChar('TPluginLoader')));

+              end;

+            end

+            else

+            begin //Newer Version already loaded

+              FreeLibrary(hLib);

+            end;

+          end

+          else

+          begin

+            FreeLibrary(hLib);

+            Core.ReportError(Integer(PChar('Plugin with this Name already exists: ' + Info.Name)), Integer(PChar('TPluginLoader')));

+          end;

+        end

+        else

+        begin

+          FreeLibrary(hLib);

+          Core.ReportError(Integer(PChar('No name reported: ' + Filename)), Integer(PChar('TPluginLoader')));

+        end;

+      end

+      else

+      begin

+        FreeLibrary(hLib);

+        Core.ReportError(Integer(PChar('Can''t find Info Procedure: ' + Filename)), Integer(PChar('TPluginLoader')));

+      end;

+    end

+    else

+      Core.ReportError(Integer(PChar('Can''t load Plugin Libary: ' + Filename)), Integer(PChar('TPluginLoader')));

+  end;

+end;

+

+//--------------

+// Calls Load Func of Plugin with the given Index

+//--------------

+Function  TPluginLoader.CallLoad(Index: Cardinal): Integer;

+begin

+  Result := -2;

+  If(Index < Length(Plugins)) then

+  begin

+    If (@Plugins[Index].Procs.Load <> nil) AND (Plugins[Index].State = 0) then

+    begin

+      Try

+        Result := Plugins[Index].Procs.Load(@PluginInterface);

+      Except

+        Result := -3;

+      End;

+

+      If (Result = 0) then

+        Plugins[Index].State := 1

+      Else

+      begin

+        FreePlugin(Index);

+        Plugins[Index].State := 255;

+        Core.ReportError(Integer(PChar('Error calling Load Function from Plugin: ' + Plugins[Index].Info.Name)), Integer(PChar('TPluginLoader')));

+      end;

+    end;

+  end;

+end;

+

+//--------------

+// Calls Init Func of Plugin with the given Index

+//--------------

+Function  TPluginLoader.CallInit(Index: Cardinal): Integer;

+begin

+  Result := -2;

+  If(Index < Length(Plugins)) then

+  begin

+    If (@Plugins[Index].Procs.Init <> nil) AND (Plugins[Index].State = 1) then

+    begin

+      Try

+        Result := Plugins[Index].Procs.Init(@PluginInterface);

+      Except

+        Result := -3;

+      End;

+      

+      If (Result = 0) then

+      begin

+        Plugins[Index].State := 2;

+        Plugins[Index].NeedsDeInit := True;

+      end

+      Else

+      begin

+        FreePlugin(Index);

+        Plugins[Index].State := 255;

+        Core.ReportError(Integer(PChar('Error calling Init Function from Plugin: ' + Plugins[Index].Info.Name)), Integer(PChar('TPluginLoader')));

+      end;

+    end;

+  end;

+end;

+

+//--------------

+// Calls DeInit Proc of Plugin with the given Index

+//--------------

+Procedure TPluginLoader.CallDeInit(Index: Cardinal);

+begin

+  If(Index < Length(Plugins)) then

+  begin

+    If (Plugins[Index].State < 4) then

+    begin

+      If (@Plugins[Index].Procs.DeInit <> nil) and (Plugins[Index].NeedsDeInit) then

+        Try

+          Plugins[Index].Procs.DeInit(@PluginInterface);

+        Except

+

+        End;

+

+      //Don't forget to remove Services and Subscriptions by this Plugin

+      Core.Hooks.DelbyOwner(-1 - Index);

+

+      FreePlugin(Index);

+    end;

+  end;

+end;

+

+//--------------

+// Frees all Plugin Sources (Procs and Handles) - Helper for Deiniting Functions

+//--------------

+Procedure TPluginLoader.FreePlugin(Index: Cardinal);

+begin

+  Plugins[Index].State := 4;

+  Plugins[Index].Procs.Load := nil;

+  Plugins[Index].Procs.Init := nil;

+  Plugins[Index].Procs.DeInit := nil;

+

+  If (Plugins[Index].hLib <> 0) then

+    FreeLibrary(Plugins[Index].hLib);

+end;

+

+

+

+//--------------

+// wParam PChar(PluginName/PluginPath) | lParam (if wParam = nil) ID of the Plugin

+//--------------

+Function TPluginLoader.LoadPlugin(wParam, lParam: DWord): integer;

+var

+  Index: Integer;

+  sFile: String;

+begin

+  Result := -1;

+  sFile := '';

+  //lParam is ID

+  If (Ptr(wParam) = nil) then

+  begin

+    Index := lParam;

+  end

+  else

+  begin //wParam is PChar

+    try

+      sFile := String(PChar(Ptr(wParam)));

+      Index := PluginExists(sFile);

+      If (Index < 0) And FileExists(sFile) then

+      begin //Is Filename

+        AddPlugin(sFile);

+        Result := Plugins[High(Plugins)].State;

+      end;

+    except

+      Index := -2;

+    end;

+  end;

+

+

+  If (Index >= 0) and (Index < Length(Plugins)) then

+  begin

+    AddPlugin(Plugins[Index].Path);

+    Result := Plugins[Index].State;

+  end;

+end;

+

+//--------------

+// wParam PChar(PluginName/PluginPath) | lParam (if wParam = nil) ID of the Plugin

+//--------------

+Function TPluginLoader.UnloadPlugin(wParam, lParam: DWord): integer;

+var

+  Index: Integer;

+  sName: String;

+begin

+  Result := -1;

+  //lParam is ID

+  If (Ptr(wParam) = nil) then

+  begin

+    Index := lParam;

+  end

+  else

+  begin //wParam is PChar

+    try

+      sName := String(PChar(Ptr(wParam)));

+      Index := PluginExists(sName);

+    except

+      Index := -2;

+    end;

+  end;

+

+

+  If (Index >= 0) and (Index < Length(Plugins)) then

+      CallDeInit(Index)

+end;

+

+//--------------

+// If wParam = -1 then (If lParam = nil then get length of Moduleinfo Array. If lparam <> nil then write array of TUS_PluginInfo to address at lparam) Else (Get PluginInfo of Plugin with Index(wParam) to Address at lParam)

+//--------------

+Function TPluginLoader.GetPluginInfo(wParam, lParam: DWord): integer;

+var I: Integer;

+begin

+  Result := 0;

+  If (wParam < 0) then

+  begin //Get Info of 1 Plugin

+    If (Ptr(lParam) <> nil) AND (wParam < Length(Plugins)) then

+    begin

+      Try

+        Result := 1;

+        PUS_PluginInfo(Ptr(lParam))^ := Plugins[wParam].Info;

+      Except

+

+      End;

+    end;

+  end

+  Else If (Ptr(lParam) = nil) then

+  begin //Get Length of Plugin (Info) Array

+    Result := Length(Plugins);

+  end

+  Else //Write PluginInfo Array to Address in lParam

+  begin

+    Try

+      For I := 0 to high(Plugins) do

+        PAUS_PluginInfo(Ptr(lParam))^[I] := Plugins[I].Info;

+      Result := Length(Plugins);

+    Except

+      Core.ReportError(Integer(PChar('Could not write PluginInfo Array')), Integer(PChar('TPluginLoader')));

+    End;

+  end;

+

+end;

+

+//--------------

+// If wParam = -1 then (If lParam = nil then get length of Plugin State Array. If lparam <> nil then write array of Byte to address at lparam) Else (Return State of Plugin with Index(wParam))

+//--------------

+Function TPluginLoader.GetPluginState(wParam, lParam: DWord): integer;

+var I: Integer;

+begin

+  Result := -1;

+  If (wParam < 0) then

+  begin //Get State of 1 Plugin

+    If (wParam < Length(Plugins)) then

+    begin

+      Result := Plugins[wParam].State;

+    end;

+  end

+  Else If (Ptr(lParam) = nil) then

+  begin //Get Length of Plugin (Info) Array

+    Result := Length(Plugins);

+  end

+  Else //Write PluginInfo Array to Address in lParam

+  begin

+    Try

+      For I := 0 to high(Plugins) do

+        Byte(Ptr(lParam + I)^) := Plugins[I].State;

+      Result := Length(Plugins);

+    Except

+      Core.ReportError(Integer(PChar('Could not write PluginState Array')), Integer(PChar('TPluginLoader')));

+    End;

+  end;

+end;

+

+

+

+

+

+{*********************

+  TtehPlugins

+  Implentation

+*********************}

+

+//-------------

+// Function that gives some Infos about the Module to the Core

+//-------------

+Procedure TtehPlugins.Info(const pInfo: PModuleInfo);

+begin

+  pInfo^.Name := 'TtehPlugins';

+  pInfo^.Version := MakeVersion(1,0,0,chr(0));

+  pInfo^.Description := 'Module executing the Plugins!';

+end;

+

+//-------------

+// Just the Constructor

+//-------------

+Constructor TtehPlugins.Create;

+begin

+  PluginLoader := nil;

+end;

+

+//-------------

+//Is Called on Loading.

+//In this Method only Events and Services should be created

+//to offer them to other Modules or Plugins during the Init process

+//If False is Returned this will cause a Forced Exit

+//-------------

+Function TtehPlugins.Load: Boolean;

+var

+  I: Integer; //Counter

+  CurExecutedBackup: Integer; //backup of Core.CurExecuted Attribute

+label Continue;

+begin

+  //Get Pointer to PluginLoader

+  PluginLoader := PPluginLoader(Core.GetModulebyName('TPluginLoader'));

+  If (PluginLoader = nil) then

+  begin

+    Result := False;

+    Core.ReportError(Integer(PChar('Could not get Pointer to PluginLoader')), Integer(PChar('TtehPlugins')));

+  end

+  else

+  begin

+    Result := True;

+

+    //Backup CurExecuted

+    CurExecutedBackup := Core.CurExecuted;

+

+    //Start Loading the Plugins

+    I := 0;

+    Continue:

+    Try

+      While (I <= High(PluginLoader.Plugins)) do

+      begin

+        Core.CurExecuted := -1 - I;

+

+        //Unload Plugin if not correctly Executed

+        If (PluginLoader.CallLoad(I) <> 0) then

+        begin

+          PluginLoader.CallDeInit(I);

+          PluginLoader.Plugins[I].State := 254; //Plugin asks for unload

+          Core.ReportDebug(Integer(PChar('Plugin Selfabort during loading process: ' + PluginLoader.Plugins[I].Info.Name)), Integer(PChar('TtehPlugins')));

+        end

+        else

+          Core.ReportDebug(Integer(PChar('Plugin loaded succesful: ' + PluginLoader.Plugins[I].Info.Name)), Integer(PChar('TtehPlugins')));

+

+        Inc(I);

+      end;

+    Except

+      //Plugin could not be loaded.

+      // => Show Error Message, then ShutDown Plugin

+      on E: Exception do

+      begin

+        PluginLoader.CallDeInit(I);

+        PluginLoader.Plugins[I].State := 255; //Plugin causes Error

+        Core.ReportError(Integer(PChar('Plugin causes Error during loading process: ' + PluginLoader.Plugins[I].Info.Name + ', ErrorMsg: "' + E.Message + '"')), Integer(PChar('TtehPlugins')));

+

+

+        //don't forget to increase I

+        Inc(I);

+      end;

+    End;

+

+    If (I <= High(PluginLoader.Plugins)) then

+      Goto Continue;

+

+    //Reset CurExecuted  

+    Core.CurExecuted := CurExecutedBackup;

+  end;

+end;

+

+//-------------

+//Is Called on Init Process

+//In this Method you can Hook some Events and Create + Init

+//your Classes, Variables etc.

+//If False is Returned this will cause a Forced Exit

+//-------------

+Function TtehPlugins.Init: Boolean;

+var

+  I: Integer; //Counter

+  CurExecutedBackup: Integer; //backup of Core.CurExecuted Attribute

+label Continue;

+begin

+  Result := True;

+

+  //Backup CurExecuted

+  CurExecutedBackup := Core.CurExecuted;

+

+  //Start Loading the Plugins

+  I := 0;

+  Continue:

+  Try

+    While (I <= High(PluginLoader.Plugins)) do

+    begin

+      Core.CurExecuted := -1 - I;

+

+      //Unload Plugin if not correctly Executed

+      If (PluginLoader.CallInit(I) <> 0) then

+      begin

+        PluginLoader.CallDeInit(I);

+        PluginLoader.Plugins[I].State := 254; //Plugin asks for unload

+        Core.ReportDebug(Integer(PChar('Plugin Selfabort during init process: ' + PluginLoader.Plugins[I].Info.Name)), Integer(PChar('TtehPlugins')));

+      end

+      else

+        Core.ReportDebug(Integer(PChar('Plugin inited succesful: ' + PluginLoader.Plugins[I].Info.Name)), Integer(PChar('TtehPlugins')));

+

+      //don't forget to increase I

+      Inc(I);

+    end;

+  Except

+    //Plugin could not be loaded.

+    // => Show Error Message, then ShutDown Plugin

+    PluginLoader.CallDeInit(I);

+    PluginLoader.Plugins[I].State := 255; //Plugin causes Error

+    Core.ReportError(Integer(PChar('Plugin causes Error during init process: ' + PluginLoader.Plugins[I].Info.Name)), Integer(PChar('TtehPlugins')));

+

+    //don't forget to increase I

+    Inc(I);

+  End;

+

+  If (I <= High(PluginLoader.Plugins)) then

+    GoTo Continue;

+

+  //Reset CurExecuted

+  Core.CurExecuted := CurExecutedBackup;

+end;

+

+//-------------

+//Is Called if this Module has been Inited and there is a Exit.

+//Deinit is in backwards Initing Order

+//-------------

+Procedure TtehPlugins.DeInit;

+var

+  I: Integer; //Counter

+  CurExecutedBackup: Integer; //backup of Core.CurExecuted Attribute

+label Continue;

+begin

+  //Backup CurExecuted

+  CurExecutedBackup := Core.CurExecuted;

+

+  //Start Loop

+  I := 0;

+  

+  Continue:

+  Try

+    While (I <= High(PluginLoader.Plugins)) do

+    begin

+      //DeInit Plugin

+      PluginLoader.CallDeInit(I);

+

+      Inc(I);

+    end;

+  Except

+    Inc(I);

+  End;

+

+  If I <= High(PluginLoader.Plugins) then

+    Goto Continue;

+

+  //Reset CurExecuted

+  Core.CurExecuted := CurExecutedBackup;

+end;

 

 end.