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authork-m_schindler <k-m_schindler@b956fd51-792f-4845-bead-9b4dfca2ff2c>2008-08-27 13:28:57 +0000
committerk-m_schindler <k-m_schindler@b956fd51-792f-4845-bead-9b4dfca2ff2c>2008-08-27 13:28:57 +0000
commit1ba91d5a0e1df7419a561f6dcf16a0839509a5e7 (patch)
tree3f76e96fc5a3f5b738dabce28642ff2415748ccb /src/Classes/UServices.pas
parente9fd8ce40b4cbf006695fd6e56f84071407843c9 (diff)
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Reordering of the directories[1]: moving Game/Code to src
git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@1302 b956fd51-792f-4845-bead-9b4dfca2ff2c
Diffstat (limited to 'src/Classes/UServices.pas')
-rw-r--r--src/Classes/UServices.pas358
1 files changed, 358 insertions, 0 deletions
diff --git a/src/Classes/UServices.pas b/src/Classes/UServices.pas
new file mode 100644
index 00000000..6325444c
--- /dev/null
+++ b/src/Classes/UServices.pas
@@ -0,0 +1,358 @@
+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.