mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-15 15:55:56 +01:00
03f9e9a1b9
Fixed issue #404 : Memory leak with empty TChromiumDefaultUrl Fixed crash in RasperryPi OS 64 bits
432 lines
12 KiB
ObjectPascal
432 lines
12 KiB
ObjectPascal
// ************************************************************************
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// ***************************** CEF4Delphi *******************************
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// ************************************************************************
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//
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// CEF4Delphi is based on DCEF3 which uses CEF to embed a chromium-based
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// browser in Delphi applications.
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//
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// The original license of DCEF3 still applies to CEF4Delphi.
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//
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// For more information about CEF4Delphi visit :
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// https://www.briskbard.com/index.php?lang=en&pageid=cef
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//
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// Copyright © 2022 Salvador Diaz Fau. All rights reserved.
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//
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// ************************************************************************
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// ************ vvvv Original license and comments below vvvv *************
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// ************************************************************************
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(*
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* Delphi Chromium Embedded 3
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*
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* Usage allowed under the restrictions of the Lesser GNU General Public License
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* or alternatively the restrictions of the Mozilla Public License 1.1
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
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* the specific language governing rights and limitations under the License.
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*
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* Unit owner : Henri Gourvest <hgourvest@gmail.com>
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* Web site : http://www.progdigy.com
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* Repository : http://code.google.com/p/delphichromiumembedded/
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* Group : http://groups.google.com/group/delphichromiumembedded
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*
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* Embarcadero Technologies, Inc is not permitted to use or redistribute
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* this source code without explicit permission.
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*
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*)
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unit uCEFBaseRefCounted;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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{$I cef.inc}
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{$IFNDEF TARGET_64BITS}{$ALIGN ON}{$ENDIF}
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{$MINENUMSIZE 4}
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interface
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uses
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{$IFDEF DELPHI16_UP}
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System.SysUtils,
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{$ELSE}
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SysUtils,
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{$ENDIF}
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uCEFInterfaces;
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type
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TLoggingInterfacedObject = class(TInterfacedObject)
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protected
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function _AddRef: Integer; reintroduce; stdcall;
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function _Release: Integer; reintroduce; stdcall;
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public
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class function NewInstance: TObject; override;
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end;
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TCefBaseRefCountedOwn = class({$IFDEF INTFLOG}TLoggingInterfacedObject{$ELSE}TInterfacedObject{$ENDIF}, ICefBaseRefCounted)
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protected
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FData: Pointer;
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function HasOneRef : boolean;
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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;
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function SameAs(aData : Pointer) : boolean; overload;
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function SameAs(const aBaseRefCounted : ICefBaseRefCounted) : boolean; overload;
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procedure DestroyOtherRefs;
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function Wrap: Pointer;
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end;
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TCefBaseRefCountedRef = class(TInterfacedObject, ICefBaseRefCounted)
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protected
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FData: Pointer;
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function HasOneRef : boolean;
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function HasAtLeastOneRef : boolean;
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public
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constructor Create(data: Pointer); virtual;
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destructor Destroy; override;
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function SameAs(aData : Pointer) : boolean; overload;
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function SameAs(const aBaseRefCounted : ICefBaseRefCounted) : boolean; overload;
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procedure DestroyOtherRefs;
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function Wrap: Pointer;
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class function UnWrap(data: Pointer): ICefBaseRefCounted;
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end;
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implementation
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uses
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{$IFDEF CEF4DELHI_ALLOC_DEBUG}uCEFConstants,{$ENDIF} uCEFTypes, uCEFMiscFunctions;
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// ***********************************************
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// ************ TCefBaseRefCountedOwn ************
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// ***********************************************
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procedure cef_base_add_ref(self: PCefBaseRefCounted); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefBaseRefCountedOwn) then
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TCefBaseRefCountedOwn(TempObject)._AddRef;
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end;
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function cef_base_release_ref(self: PCefBaseRefCounted): Integer; stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefBaseRefCountedOwn) then
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Result := TCefBaseRefCountedOwn(TempObject)._Release
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else
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Result := 0;
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end;
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function cef_base_has_one_ref(self: PCefBaseRefCounted): Integer; stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefBaseRefCountedOwn) then
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Result := Ord(TCefBaseRefCountedOwn(TempObject).FRefCount = 1)
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else
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Result := Ord(False);
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end;
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function cef_base_has_at_least_one_ref(self: PCefBaseRefCounted): Integer; stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefBaseRefCountedOwn) then
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Result := Ord(TCefBaseRefCountedOwn(TempObject).FRefCount >= 1)
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else
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Result := Ord(False);
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end;
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procedure cef_base_add_ref_owned(self: PCefBaseRefCounted); stdcall;
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begin
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//
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end;
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function cef_base_release_owned(self: PCefBaseRefCounted): Integer; stdcall;
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begin
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Result := 1;
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end;
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function cef_base_has_one_ref_owned(self: PCefBaseRefCounted): Integer; stdcall;
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begin
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Result := 1;
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end;
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function cef_base_has_at_least_one_ref_owned(self: PCefBaseRefCounted): Integer; stdcall;
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begin
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Result := 1;
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end;
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constructor TCefBaseRefCountedOwn.CreateData(size: Cardinal; owned : boolean);
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begin
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{$IFDEF CEF4DELHI_ALLOC_DEBUG}
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GetMem(FData, size + (SizeOf(Pointer) * 3));
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PPointer(FData)^ := CEF4DELPHI_ALLOC_PADDING;
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Inc(PByte(FData), SizeOf(Pointer));
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PPointer(FData)^ := CEF4DELPHI_ALLOC_PADDING;
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Inc(PByte(FData), SizeOf(Pointer));
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PPointer(FData)^ := Self;
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Inc(PByte(FData), SizeOf(Pointer));
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FillChar(FData^, size, 0);
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PCefBaseRefCounted(FData)^.size := size;
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{$ELSE}
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GetMem(FData, size + SizeOf(Pointer));
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PPointer(FData)^ := Self;
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Inc(PByte(FData), SizeOf(Pointer));
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FillChar(FData^, size, 0);
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PCefBaseRefCounted(FData)^.size := size;
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{$ENDIF}
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if owned then
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begin
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PCefBaseRefCounted(FData)^.add_ref := {$IFDEF FPC}@{$ENDIF}cef_base_add_ref_owned;
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PCefBaseRefCounted(FData)^.release := {$IFDEF FPC}@{$ENDIF}cef_base_release_owned;
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PCefBaseRefCounted(FData)^.has_one_ref := {$IFDEF FPC}@{$ENDIF}cef_base_has_one_ref_owned;
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PCefBaseRefCounted(FData)^.has_at_least_one_ref := {$IFDEF FPC}@{$ENDIF}cef_base_has_at_least_one_ref_owned;
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end
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else
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begin
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PCefBaseRefCounted(FData)^.add_ref := {$IFDEF FPC}@{$ENDIF}cef_base_add_ref;
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PCefBaseRefCounted(FData)^.release := {$IFDEF FPC}@{$ENDIF}cef_base_release_ref;
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PCefBaseRefCounted(FData)^.has_one_ref := {$IFDEF FPC}@{$ENDIF}cef_base_has_one_ref;
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PCefBaseRefCounted(FData)^.has_at_least_one_ref := {$IFDEF FPC}@{$ENDIF}cef_base_has_at_least_one_ref;
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end;
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end;
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destructor TCefBaseRefCountedOwn.Destroy;
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var
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TempPointer : pointer;
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begin
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try
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if (FData <> nil) then
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begin
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TempPointer := FData;
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{$IFDEF CEF4DELHI_ALLOC_DEBUG}
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Dec(PByte(TempPointer), SizeOf(Pointer) * 3);
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FillChar(TempPointer^, (SizeOf(Pointer) * 3) + SizeOf(TCefBaseRefCounted), 0);
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{$ELSE}
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Dec(PByte(TempPointer), SizeOf(Pointer));
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FillChar(TempPointer^, SizeOf(Pointer) + SizeOf(TCefBaseRefCounted), 0);
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{$ENDIF}
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FreeMem(TempPointer);
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end;
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finally
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FData := nil;
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inherited Destroy;
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end;
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end;
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function TCefBaseRefCountedOwn.SameAs(aData : Pointer) : boolean;
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begin
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Result := (FData = aData);
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end;
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function TCefBaseRefCountedOwn.SameAs(const aBaseRefCounted : ICefBaseRefCounted) : boolean;
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var
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TempData : Pointer;
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begin
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Result := False;
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if (aBaseRefCounted <> nil) then
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begin
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TempData := aBaseRefCounted.Wrap;
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if (TempData <> nil) then
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begin
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Result := SameAs(TempData);
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if assigned(PCefBaseRefCounted(TempData)^.release) then
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PCefBaseRefCounted(TempData)^.release(PCefBaseRefCounted(TempData));
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end;
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end;
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end;
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procedure TCefBaseRefCountedOwn.DestroyOtherRefs;
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begin
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while HasAtLeastOneRef and not(HasOneRef) do
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_Release;
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end;
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function TCefBaseRefCountedOwn.Wrap: Pointer;
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{$IFDEF CEF4DELHI_ALLOC_DEBUG}
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var
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TempPointer : pointer;
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{$ENDIF}
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begin
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Result := FData;
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{$IFDEF CEF4DELHI_ALLOC_DEBUG}
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if (FData <> nil) then
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begin
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TempPointer := FData;
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Dec(PByte(TempPointer), SizeOf(Pointer) * 3);
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if (PPointer(TempPointer)^ <> CEF4DELPHI_ALLOC_PADDING) then
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begin
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Result := nil;
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CefDebugLog('Pointer to an unknown memory address!', CEF_LOG_SEVERITY_INFO);
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end
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else
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if Assigned(PCefBaseRefCounted(FData)^.add_ref) then
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PCefBaseRefCounted(FData)^.add_ref(PCefBaseRefCounted(FData));
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end;
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{$ELSE}
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if (FData <> nil) and Assigned(PCefBaseRefCounted(FData)^.add_ref) then
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PCefBaseRefCounted(FData)^.add_ref(PCefBaseRefCounted(FData));
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{$ENDIF}
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end;
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function TCefBaseRefCountedOwn.HasOneRef : boolean;
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begin
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if (FData <> nil) and Assigned(PCefBaseRefCounted(FData)^.has_one_ref) then
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Result := PCefBaseRefCounted(FData)^.has_one_ref(PCefBaseRefCounted(FData)) <> 0
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else
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Result := False;
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end;
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function TCefBaseRefCountedOwn.HasAtLeastOneRef : boolean;
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begin
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if (FData <> nil) and Assigned(PCefBaseRefCounted(FData)^.has_at_least_one_ref) then
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Result := PCefBaseRefCounted(FData)^.has_at_least_one_ref(PCefBaseRefCounted(FData)) <> 0
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else
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Result := False;
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end;
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// ***********************************************
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// ************ TCefBaseRefCountedRef ************
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// ***********************************************
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constructor TCefBaseRefCountedRef.Create(data: Pointer);
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begin
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Assert(data <> nil);
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FData := data;
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end;
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destructor TCefBaseRefCountedRef.Destroy;
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begin
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try
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if (FData <> nil) and assigned(PCefBaseRefCounted(FData)^.release) then
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begin
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{$IFDEF INTFLOG}
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CefDebugLog(ClassName + '.Destroy -> FRefCount = ' +
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IntToStr(PCefBaseRefCounted(FData)^.release(PCefBaseRefCounted(FData))));
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{$ELSE}
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PCefBaseRefCounted(FData)^.release(PCefBaseRefCounted(FData));
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{$ENDIF}
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end;
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finally
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FData := nil;
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inherited Destroy;
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end;
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end;
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function TCefBaseRefCountedRef.SameAs(aData : Pointer) : boolean;
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begin
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Result := (FData = aData);
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end;
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function TCefBaseRefCountedRef.SameAs(const aBaseRefCounted : ICefBaseRefCounted) : boolean;
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var
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TempData : Pointer;
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begin
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Result := False;
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if (aBaseRefCounted <> nil) then
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begin
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TempData := aBaseRefCounted.Wrap;
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if (TempData <> nil) then
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begin
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Result := SameAs(TempData);
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if assigned(PCefBaseRefCounted(TempData)^.release) then
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PCefBaseRefCounted(TempData)^.release(PCefBaseRefCounted(TempData));
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end;
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end;
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end;
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class function TCefBaseRefCountedRef.UnWrap(data: Pointer): ICefBaseRefCounted;
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begin
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if (data <> nil) then
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Result := Create(data) as ICefBaseRefCounted
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else
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Result := nil;
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end;
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function TCefBaseRefCountedRef.Wrap: Pointer;
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begin
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Result := FData;
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if (FData <> nil) and Assigned(PCefBaseRefCounted(FData)^.add_ref) then
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begin
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PCefBaseRefCounted(FData)^.add_ref(PCefBaseRefCounted(FData));
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{$IFDEF INTFLOG}
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CefDebugLog(ClassName + '.Wrap');
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{$ENDIF}
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end;
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end;
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function TCefBaseRefCountedRef.HasOneRef : boolean;
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begin
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Result := (PCefBaseRefCounted(FData)^.has_one_ref(PCefBaseRefCounted(FData)) <> 0);
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end;
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function TCefBaseRefCountedRef.HasAtLeastOneRef : boolean;
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begin
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Result := (PCefBaseRefCounted(FData)^.has_at_least_one_ref(PCefBaseRefCounted(FData)) <> 0);
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end;
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procedure TCefBaseRefCountedRef.DestroyOtherRefs;
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begin
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//
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end;
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// ************************************************
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// *********** TLoggingInterfacedObject ***********
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// ************************************************
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function TLoggingInterfacedObject._AddRef: Integer; stdcall;
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begin
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Result := inherited _AddRef;
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CefDebugLog(ClassName + '._AddRef -> FRefCount = ' + IntToStr(Result));
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end;
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function TLoggingInterfacedObject._Release: Integer; stdcall;
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begin
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CefDebugLog(ClassName + '._Release -> FRefCount = ' + IntToStr(pred(RefCount)));
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Result := inherited _Release;
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end;
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class function TLoggingInterfacedObject.NewInstance: TObject;
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begin
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Result := inherited NewInstance;
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CefDebugLog(ClassName + '.NewInstance -> FRefCount = ' + IntToStr(TInterfacedObject(Result).RefCount));
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end;
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end.
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