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CEF4Delphi/source/uCEFBaseRefCounted.pas

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// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF to embed a chromium-based
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// browser in Delphi applications.
//
// The original license of DCEF3 still applies to CEF4Delphi.
//
// For more information about CEF4Delphi visit :
// https://www.briskbard.com/index.php?lang=en&pageid=cef
//
// Copyright � 2019 Salvador Diaz Fau. All rights reserved.
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//
// ************************************************************************
// ************ vvvv Original license and comments below vvvv *************
// ************************************************************************
(*
* Delphi Chromium Embedded 3
*
* Usage allowed under the restrictions of the Lesser GNU General Public License
* or alternatively the restrictions of the Mozilla Public License 1.1
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* Unit owner : Henri Gourvest <hgourvest@gmail.com>
* Web site : http://www.progdigy.com
* Repository : http://code.google.com/p/delphichromiumembedded/
* Group : http://groups.google.com/group/delphichromiumembedded
*
* Embarcadero Technologies, Inc is not permitted to use or redistribute
* this source code without explicit permission.
*
*)
unit uCEFBaseRefCounted;
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{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
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{$I cef.inc}
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interface
uses
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{$IFDEF DELPHI16_UP}
System.SysUtils,
{$ELSE}
SysUtils,
{$ENDIF}
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uCEFInterfaces;
type
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TLoggingInterfacedObject = class(TInterfacedObject)
protected
function _AddRef: Integer; reintroduce; stdcall;
function _Release: Integer; reintroduce; stdcall;
public
class function NewInstance: TObject; override;
end;
TCefBaseRefCountedOwn = class({$IFDEF INTFLOG}TLoggingInterfacedObject{$ELSE}TInterfacedObject{$ENDIF}, ICefBaseRefCounted)
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protected
FData: Pointer;
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function HasOneRef : boolean;
function HasAtLeastOneRef : boolean;
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public
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constructor CreateData(size: Cardinal; owned : boolean = False); virtual;
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destructor Destroy; override;
function SameAs(aData : Pointer) : boolean; overload;
function SameAs(const aBaseRefCounted : ICefBaseRefCounted) : boolean; overload;
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function Wrap: Pointer;
end;
TCefBaseRefCountedRef = class(TInterfacedObject, ICefBaseRefCounted)
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protected
FData: Pointer;
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function HasOneRef : boolean;
function HasAtLeastOneRef : boolean;
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public
constructor Create(data: Pointer); virtual;
destructor Destroy; override;
function SameAs(aData : Pointer) : boolean; overload;
function SameAs(const aBaseRefCounted : ICefBaseRefCounted) : boolean; overload;
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function Wrap: Pointer;
class function UnWrap(data: Pointer): ICefBaseRefCounted;
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end;
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implementation
uses
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uCEFTypes, uCEFMiscFunctions, uCEFConstants, uCEFApplication;
// ***********************************************
// ************ TCefBaseRefCountedOwn ************
// ***********************************************
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procedure cef_base_add_ref(self: PCefBaseRefCounted); stdcall;
var
TempObject : TObject;
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begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefBaseRefCountedOwn) then
TCefBaseRefCountedOwn(TempObject)._AddRef;
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end;
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function cef_base_release_ref(self: PCefBaseRefCounted): Integer; stdcall;
var
TempObject : TObject;
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begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefBaseRefCountedOwn) then
Result := TCefBaseRefCountedOwn(TempObject)._Release
else
Result := 0;
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end;
function cef_base_has_one_ref(self: PCefBaseRefCounted): Integer; stdcall;
var
TempObject : TObject;
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begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefBaseRefCountedOwn) then
Result := Ord(TCefBaseRefCountedOwn(TempObject).FRefCount = 1)
else
Result := Ord(False);
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end;
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function cef_base_has_at_least_one_ref(self: PCefBaseRefCounted): Integer; stdcall;
var
TempObject : TObject;
begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefBaseRefCountedOwn) then
Result := Ord(TCefBaseRefCountedOwn(TempObject).FRefCount >= 1)
else
Result := Ord(False);
end;
procedure cef_base_add_ref_owned(self: PCefBaseRefCounted); stdcall;
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begin
//
end;
function cef_base_release_owned(self: PCefBaseRefCounted): Integer; stdcall;
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begin
Result := 1;
end;
function cef_base_has_one_ref_owned(self: PCefBaseRefCounted): Integer; stdcall;
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begin
Result := 1;
end;
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function cef_base_has_at_least_one_ref_owned(self: PCefBaseRefCounted): Integer; stdcall;
begin
Result := 1;
end;
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constructor TCefBaseRefCountedOwn.CreateData(size: Cardinal; owned : boolean);
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begin
GetMem(FData, size + SizeOf(Pointer));
PPointer(FData)^ := Self;
Inc(PByte(FData), SizeOf(Pointer));
FillChar(FData^, size, 0);
PCefBaseRefCounted(FData)^.size := size;
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if owned then
begin
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PCefBaseRefCounted(FData)^.add_ref := {$IFDEF FPC}@{$ENDIF}cef_base_add_ref_owned;
PCefBaseRefCounted(FData)^.release := {$IFDEF FPC}@{$ENDIF}cef_base_release_owned;
PCefBaseRefCounted(FData)^.has_one_ref := {$IFDEF FPC}@{$ENDIF}cef_base_has_one_ref_owned;
PCefBaseRefCounted(FData)^.has_at_least_one_ref := {$IFDEF FPC}@{$ENDIF}cef_base_has_at_least_one_ref_owned;
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end
else
begin
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PCefBaseRefCounted(FData)^.add_ref := {$IFDEF FPC}@{$ENDIF}cef_base_add_ref;
PCefBaseRefCounted(FData)^.release := {$IFDEF FPC}@{$ENDIF}cef_base_release_ref;
PCefBaseRefCounted(FData)^.has_one_ref := {$IFDEF FPC}@{$ENDIF}cef_base_has_one_ref;
PCefBaseRefCounted(FData)^.has_at_least_one_ref := {$IFDEF FPC}@{$ENDIF}cef_base_has_at_least_one_ref;
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end;
end;
destructor TCefBaseRefCountedOwn.Destroy;
var
TempPointer : pointer;
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begin
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try
if (FData <> nil) then
begin
TempPointer := FData;
Dec(PByte(TempPointer), SizeOf(Pointer));
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FillChar(TempPointer^, SizeOf(Pointer) + SizeOf(TCefBaseRefCounted), 0);
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FreeMem(TempPointer);
end;
finally
FData := nil;
inherited Destroy;
end;
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end;
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function TCefBaseRefCountedOwn.SameAs(aData : Pointer) : boolean;
begin
Result := (FData = aData);
end;
function TCefBaseRefCountedOwn.SameAs(const aBaseRefCounted : ICefBaseRefCounted) : boolean;
var
TempData : Pointer;
begin
Result := False;
if (aBaseRefCounted <> nil) then
begin
TempData := aBaseRefCounted.Wrap;
if (TempData <> nil) then
begin
Result := SameAs(TempData);
if assigned(PCefBaseRefCounted(TempData)^.release) then
PCefBaseRefCounted(TempData)^.release(PCefBaseRefCounted(TempData));
end;
end;
end;
function TCefBaseRefCountedOwn.Wrap: Pointer;
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begin
Result := FData;
if (FData <> nil) and Assigned(PCefBaseRefCounted(FData)^.add_ref) then
PCefBaseRefCounted(FData)^.add_ref(PCefBaseRefCounted(FData));
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end;
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function TCefBaseRefCountedOwn.HasOneRef : boolean;
begin
if (FData <> nil) and Assigned(PCefBaseRefCounted(FData)^.has_one_ref) then
Result := PCefBaseRefCounted(FData)^.has_one_ref(PCefBaseRefCounted(FData)) <> 0
else
Result := False;
end;
function TCefBaseRefCountedOwn.HasAtLeastOneRef : boolean;
begin
if (FData <> nil) and Assigned(PCefBaseRefCounted(FData)^.has_at_least_one_ref) then
Result := PCefBaseRefCounted(FData)^.has_at_least_one_ref(PCefBaseRefCounted(FData)) <> 0
else
Result := False;
end;
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// ***********************************************
// ************ TCefBaseRefCountedRef ************
// ***********************************************
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constructor TCefBaseRefCountedRef.Create(data: Pointer);
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begin
Assert(data <> nil);
FData := data;
end;
destructor TCefBaseRefCountedRef.Destroy;
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begin
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try
if (FData <> nil) and assigned(PCefBaseRefCounted(FData)^.release) then
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begin
{$IFDEF INTFLOG}
CefDebugLog(ClassName + '.Destroy -> FRefCount = ' +
IntToStr(PCefBaseRefCounted(FData)^.release(PCefBaseRefCounted(FData))));
{$ELSE}
PCefBaseRefCounted(FData)^.release(PCefBaseRefCounted(FData));
{$ENDIF}
end;
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finally
FData := nil;
inherited Destroy;
end;
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end;
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function TCefBaseRefCountedRef.SameAs(aData : Pointer) : boolean;
begin
Result := (FData = aData);
end;
function TCefBaseRefCountedRef.SameAs(const aBaseRefCounted : ICefBaseRefCounted) : boolean;
var
TempData : Pointer;
begin
Result := False;
if (aBaseRefCounted <> nil) then
begin
TempData := aBaseRefCounted.Wrap;
if (TempData <> nil) then
begin
Result := SameAs(TempData);
if assigned(PCefBaseRefCounted(TempData)^.release) then
PCefBaseRefCounted(TempData)^.release(PCefBaseRefCounted(TempData));
end;
end;
end;
class function TCefBaseRefCountedRef.UnWrap(data: Pointer): ICefBaseRefCounted;
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begin
if (data <> nil) then
Result := Create(data) as ICefBaseRefCounted
else
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Result := nil;
end;
function TCefBaseRefCountedRef.Wrap: Pointer;
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begin
Result := FData;
if (FData <> nil) and Assigned(PCefBaseRefCounted(FData)^.add_ref) then
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begin
PCefBaseRefCounted(FData)^.add_ref(PCefBaseRefCounted(FData));
{$IFDEF INTFLOG}
CefDebugLog(ClassName + '.Wrap');
{$ENDIF}
end;
end;
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function TCefBaseRefCountedRef.HasOneRef : boolean;
begin
Result := (PCefBaseRefCounted(FData)^.has_one_ref(PCefBaseRefCounted(FData)) <> 0);
end;
function TCefBaseRefCountedRef.HasAtLeastOneRef : boolean;
begin
Result := (PCefBaseRefCounted(FData)^.has_at_least_one_ref(PCefBaseRefCounted(FData)) <> 0);
end;
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// ************************************************
// *********** TLoggingInterfacedObject ***********
// ************************************************
function TLoggingInterfacedObject._AddRef: Integer; stdcall;
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begin
Result := inherited _AddRef;
CefDebugLog(ClassName + '._AddRef -> FRefCount = ' + IntToStr(Result));
end;
function TLoggingInterfacedObject._Release: Integer; stdcall;
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begin
CefDebugLog(ClassName + '._Release -> FRefCount = ' + IntToStr(pred(RefCount)));
Result := inherited _Release;
end;
class function TLoggingInterfacedObject.NewInstance: TObject;
begin
Result := inherited NewInstance;
CefDebugLog(ClassName + '.NewInstance -> FRefCount = ' + IntToStr(TInterfacedObject(Result).RefCount));
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end;
end.