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-rw-r--r--src/base/UServices.pas384
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diff --git a/src/base/UServices.pas b/src/base/UServices.pas
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-{* UltraStar Deluxe - Karaoke Game
- *
- * UltraStar Deluxe is the legal property of its developers, whose names
- * are too numerous to list here. Please refer to the COPYRIGHT
- * file distributed with this source distribution.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- * $URL$
- * $Id$
- *}
-
-unit UServices;
-
-interface
-
-{$IFDEF FPC}
- {$MODE Delphi}
-{$ENDIF}
-
-{$I switches.inc}
-
-uses
- uPluginDefs,
- SysUtils;
-{*********************
- TServiceManager
- Class for saving, managing and calling of Services.
- Saves all Services and their Procs
-*********************}
-
-type
- TServiceName = String[60];
- PServiceInfo = ^TServiceInfo;
- TServiceInfo = record
- Self: THandle; //Handle of this Service
- Hash: Integer; //4 Bit Hash of the Services Name
- Name: TServiceName; //Name of this Service
-
- Owner: Integer; //If < 0 [-(DLLMan Pluginindex + 1)]; 0 - undefined, On Error Full shutdown, If < 0 [ModuleIndex - 1]
-
- Next: PServiceInfo; //Pointer to the Next Service in teh list
-
- //Here is s/t tricky
- //To avoid writing of Wrapping Functions to offer a Service from a Class
- //We save a Normal Proc or a Method of a Class
- Case isClass: boolean of
- False: (Proc: TUS_Service); //Proc that will be called on Event
- True: (ProcOfClass: TUS_Service_of_Object);
- end;
-
- TServiceManager = class
- private
- //Managing Service List
- FirstService: PServiceInfo;
- LastService: PServiceInfo;
-
- //Some Speed improvement by caching the last 4 called Services
- //Most of the time a Service is called multiple times
- ServiceCache: Array[0..3] of PServiceInfo;
- NextCacheItem: Byte;
-
- //Next Service added gets this Handle:
- NextHandle: THandle;
- public
- Constructor Create;
-
- Function AddService(const ServiceName: PChar; const Proc: TUS_Service = nil; const ProcofClass: TUS_Service_of_Object = nil): THandle;
- Function DelService(const hService: THandle): integer;
-
- Function CallService(const ServiceName: PChar; const wParam: TwParam; lParam: TlParam): integer;
-
- Function NametoHash(const ServiceName: TServiceName): Integer;
- Function ServiceExists(const ServiceName: PChar): Integer;
- end;
-
-var
- ServiceManager: TServiceManager;
-
-implementation
-uses
- ULog,
- UCore;
-
-//------------
-// Create - Creates Class and Set Standard Values
-//------------
-Constructor TServiceManager.Create;
-begin
- inherited;
-
- FirstService := nil;
- LastService := nil;
-
- ServiceCache[0] := nil;
- ServiceCache[1] := nil;
- ServiceCache[2] := nil;
- ServiceCache[3] := nil;
-
- NextCacheItem := 0;
-
- NextHandle := 1;
-
- {$IFDEF DEBUG}
- debugWriteln('ServiceManager: Succesful created!');
- {$ENDIF}
-end;
-
-//------------
-// Function Creates a new Service and Returns the Services Handle,
-// 0 on Failure. (Name already exists)
-//------------
-Function TServiceManager.AddService(const ServiceName: PChar; const Proc: TUS_Service; const ProcofClass: TUS_Service_of_Object): THandle;
-var
- Cur: PServiceInfo;
-begin
- Result := 0;
-
- If (@Proc <> nil) or (@ProcOfClass <> nil) then
- begin
- If (ServiceExists(ServiceName) = 0) then
- begin //There is a Proc and the Service does not already exist
- //Ok Add it!
-
- //Get Memory
- GetMem(Cur, SizeOf(TServiceInfo));
-
- //Fill it with Data
- Cur.Next := nil;
-
- If (@Proc = nil) then
- begin //Use the ProcofClass Method
- Cur.isClass := True;
- Cur.ProcOfClass := ProcofClass;
- end
- else //Use the normal Proc
- begin
- Cur.isClass := False;
- Cur.Proc := Proc;
- end;
-
- Cur.Self := NextHandle;
- //Zero Name
- Cur.Name := #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0;
- Cur.Name := String(ServiceName);
- Cur.Hash := NametoHash(Cur.Name);
-
- //Add Owner to Service
- Cur.Owner := Core.CurExecuted;
-
- //Add Service to the List
- If (FirstService = nil) then
- FirstService := Cur;
-
- If (LastService <> nil) then
- LastService.Next := Cur;
-
- LastService := Cur;
-
- {$IFDEF DEBUG}
- debugWriteln('ServiceManager: Service added: ''' + ServiceName + ''', Handle: ' + InttoStr(Cur.Self));
- {$ENDIF}
-
- //Inc Next Handle
- Inc(NextHandle);
- end
- {$IFDEF DEBUG}
- else debugWriteln('ServiceManager: Try to readd Service: ' + ServiceName);
- {$ENDIF}
- end;
-end;
-
-//------------
-// Function Destroys a Service, 0 on success, not 0 on Failure
-//------------
-Function TServiceManager.DelService(const hService: THandle): integer;
-var
- Last, Cur: PServiceInfo;
- I: Integer;
-begin
- Result := -1;
-
- Last := nil;
- Cur := FirstService;
-
- //Search for Service to Delete
- While (Cur <> nil) do
- begin
- If (Cur.Self = hService) then
- begin //Found Service => Delete it
-
- //Delete from List
- If (Last = nil) then //Found first Service
- FirstService := Cur.Next
- Else //Service behind the first
- Last.Next := Cur.Next;
-
- //IF this is the LastService, correct LastService
- If (Cur = LastService) then
- LastService := Last;
-
- //Search for Service in Cache and delete it if found
- For I := 0 to High(ServiceCache) do
- If (ServiceCache[I] = Cur) then
- begin
- ServiceCache[I] := nil;
- end;
-
- {$IFDEF DEBUG}
- debugWriteln('ServiceManager: Removed Service succesful: ' + Cur.Name);
- {$ENDIF}
-
- //Free Memory
- Freemem(Cur, SizeOf(TServiceInfo));
-
- //Break the Loop
- Break;
- end;
-
- //Go to Next Service
- Last := Cur;
- Cur := Cur.Next;
- end;
-end;
-
-//------------
-// Function Calls a Services Proc
-// Returns Services Return Value or SERVICE_NOT_FOUND on Failure
-//------------
-Function TServiceManager.CallService(const ServiceName: PChar; const wParam: TwParam; lParam: TlParam): integer;
-var
- SExists: Integer;
- Service: PServiceInfo;
- CurExecutedBackup: Integer; //backup of Core.CurExecuted Attribute
-begin
- Result := SERVICE_NOT_FOUND;
- SExists := ServiceExists(ServiceName);
- If (SExists <> 0) then
- begin
- //Backup CurExecuted
- CurExecutedBackup := Core.CurExecuted;
-
- Service := Pointer(SExists);
-
- If (Service.isClass) then
- //Use Proc of Class
- Result := Service.ProcOfClass(wParam, lParam)
- Else
- //Use normal Proc
- Result := Service.Proc(wParam, lParam);
-
- //Restore CurExecuted
- Core.CurExecuted := CurExecutedBackup;
- end;
-
- {$IFDEF DEBUG}
- debugWriteln('ServiceManager: Service ''' + ServiceName + ''' called. Result: ' + InttoStr(Result));
- {$ENDIF}
-end;
-
-//------------
-// Generates the Hash for the given Name
-//------------
-Function TServiceManager.NametoHash(const ServiceName: TServiceName): Integer;
-// FIXME: check if the non-asm version is fast enough and use it by default if so
-{$IF Defined(CPUX86_64)}
-{$IFDEF FPC}
- {$ASMMODE Intel}
-{$ENDIF}
-asm
- { CL: Counter; RAX: Result; RDX: Current Memory Address }
- Mov RCX, 14
- Mov RDX, ServiceName {Save Address of String that should be "Hashed"}
- Mov RAX, [RDX]
- @FoldLoop: ADD RDX, 4 {jump 4 Byte(32 Bit) to the next tile }
- ADD RAX, [RDX] {Add the Value of the next 4 Byte of the String to the Hash}
- LOOP @FoldLoop {Fold again if there are Chars Left}
-end;
-{$ELSEIF Defined(CPU386) or Defined(CPUI386)}
-{$IFDEF FPC}
- {$ASMMODE Intel}
-{$ENDIF}
-asm
- { CL: Counter; EAX: Result; EDX: Current Memory Address }
- Mov ECX, 14 {Init Counter, Fold 14 Times to get 4 Bytes out of 60}
- Mov EDX, ServiceName {Save Address of String that should be "Hashed"}
- Mov EAX, [EDX]
- @FoldLoop: ADD EDX, 4 {jump 4 Byte(32 Bit) to the next tile }
- ADD EAX, [EDX] {Add the Value of the next 4 Byte of the String to the Hash}
- LOOP @FoldLoop {Fold again if there are Chars Left}
-end;
-{$ELSE}
-var
- i: integer;
- ptr: ^integer;
-begin
- ptr := @ServiceName;
- Result := 0;
- for i := 1 to 14 do
- begin
- Result := Result + ptr^;
- Inc(ptr);
- end;
-end;
-{$IFEND}
-
-
-//------------
-// Function Returns Non Zero if a Service with the given Name Exists, otherwise 0
-//------------
-Function TServiceManager.ServiceExists(const ServiceName: PChar): Integer;
-var
- Name: TServiceName;
- Hash: Integer;
- Cur: PServiceInfo;
- I: Byte;
-begin
- Result := 0;
- // to-do : Write a Metbod (in ASM) to Zero and Add in one turn (faster then this dirty hack ;)
- //Zero Name:
- Name := #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0 + #0;
- //Add Service Name
- Name := String(ServiceName);
- Hash := NametoHash(Name);
-
- //First of all Look for the Service in Cache
- For I := 0 to High(ServiceCache) do
- begin
- If (ServiceCache[I] <> nil) AND (ServiceCache[I].Hash = Hash) then
- begin
- If (ServiceCache[I].Name = Name) then
- begin //Found Service in Cache
- Result := Integer(ServiceCache[I]);
-
- {$IFDEF DEBUG}
- debugWriteln('ServiceManager: Found Service in Cache: ''' + ServiceName + '''');
- {$ENDIF}
-
- Break;
- end;
- end;
- end;
-
- If (Result = 0) then
- begin
- Cur := FirstService;
- While (Cur <> nil) do
- begin
- If (Cur.Hash = Hash) then
- begin
- If (Cur.Name = Name) then
- begin //Found the Service
- Result := Integer(Cur);
-
- {$IFDEF DEBUG}
- debugWriteln('ServiceManager: Found Service in List: ''' + ServiceName + '''');
- {$ENDIF}
-
- //Add to Cache
- ServiceCache[NextCacheItem] := Cur;
- NextCacheItem := (NextCacheItem + 1) AND 3;
- Break;
- end;
- end;
-
- Cur := Cur.Next;
- end;
- end;
-end;
-
-end.