mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 00:25:27 +00:00
672 lines
17 KiB
C++
672 lines
17 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <assert.h>
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#include <stdio.h>
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "nsISupports.h"
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#include "nsQueryObject.h"
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#include "mozilla/Unused.h"
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#define NS_FOO_IID \
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{ 0x6f7652e0, 0xee43, 0x11d1, \
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{ 0x9c, 0xc3, 0x00, 0x60, 0x08, 0x8c, 0xa6, 0xb3 } }
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class Foo : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_FOO_IID)
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public:
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Foo();
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// virtual dtor because Bar uses our Release()
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virtual ~Foo();
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NS_IMETHOD_(MozExternalRefCountType) AddRef();
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NS_IMETHOD_(MozExternalRefCountType) Release();
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NS_IMETHOD QueryInterface( const nsIID&, void** );
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void MemberFunction( int, int*, int& );
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virtual void VirtualMemberFunction( int, int*, int& );
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virtual void VirtualConstMemberFunction( int, int*, int& ) const;
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static void print_totals();
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void NonconstMethod() {}
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void ConstMethod() const {}
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private:
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unsigned int refcount_;
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static unsigned int total_constructions_;
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static unsigned int total_destructions_;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(Foo, NS_FOO_IID)
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class Bar;
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// some types I'll need
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typedef unsigned long NS_RESULT;
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// some functions I'll need (and define below)
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nsresult CreateFoo( void** );
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nsresult CreateBar( void** result );
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void AnFooPtrPtrContext( Foo** );
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void AnISupportsPtrPtrContext( nsISupports** );
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void AVoidPtrPtrContext( void** );
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void set_a_Foo( RefPtr<Foo>* result );
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RefPtr<Foo> return_a_Foo();
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unsigned int Foo::total_constructions_;
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unsigned int Foo::total_destructions_;
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class test_message
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{
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public:
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test_message()
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{
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printf("BEGIN unit tests for |nsRefPtr|, compiled " __DATE__ "\n");
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}
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~test_message()
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{
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Foo::print_totals();
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printf("END unit tests for |nsRefPtr|.\n");
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}
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};
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test_message gTestMessage;
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/*
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...
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*/
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void
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Foo::print_totals()
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{
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printf("total constructions/destructions --> %d/%d\n",
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total_constructions_, total_destructions_);
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}
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Foo::Foo()
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: refcount_(0)
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{
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++total_constructions_;
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printf(" new Foo@%p [#%d]\n",
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static_cast<void*>(this), total_constructions_);
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}
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Foo::~Foo()
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{
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++total_destructions_;
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printf("Foo@%p::~Foo() [#%d]\n",
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static_cast<void*>(this), total_destructions_);
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}
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MozExternalRefCountType
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Foo::AddRef()
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{
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++refcount_;
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printf("Foo@%p::AddRef(), refcount --> %d\n",
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static_cast<void*>(this), refcount_);
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return refcount_;
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}
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MozExternalRefCountType
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Foo::Release()
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{
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int newcount = --refcount_;
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if ( newcount == 0 )
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printf(">>");
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printf("Foo@%p::Release(), refcount --> %d\n",
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static_cast<void*>(this), refcount_);
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if ( newcount == 0 )
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{
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printf(" delete Foo@%p\n", static_cast<void*>(this));
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printf("<<Foo@%p::Release()\n", static_cast<void*>(this));
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delete this;
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}
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return newcount;
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}
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nsresult
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Foo::QueryInterface( const nsIID& aIID, void** aResult )
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{
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printf("Foo@%p::QueryInterface()\n", static_cast<void*>(this));
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nsISupports* rawPtr = 0;
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nsresult status = NS_OK;
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if ( aIID.Equals(NS_GET_IID(Foo)) )
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rawPtr = this;
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else
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{
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nsID iid_of_ISupports = NS_ISUPPORTS_IID;
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if ( aIID.Equals(iid_of_ISupports) )
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rawPtr = static_cast<nsISupports*>(this);
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else
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status = NS_ERROR_NO_INTERFACE;
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}
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NS_IF_ADDREF(rawPtr);
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*aResult = rawPtr;
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return status;
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}
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void
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Foo::MemberFunction( int aArg1, int* aArgPtr, int& aArgRef )
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{
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printf("member function is invoked.\n");
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}
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void
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Foo::VirtualMemberFunction( int aArg1, int* aArgPtr, int& aArgRef )
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{
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printf("virtual member function is invoked.\n");
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}
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void
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Foo::VirtualConstMemberFunction( int aArg1, int* aArgPtr, int& aArgRef ) const
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{
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printf("virtual const member function is invoked.\n");
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}
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nsresult
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CreateFoo( void** result )
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// a typical factory function (that calls AddRef)
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{
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printf(">>CreateFoo() --> ");
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Foo* foop = new Foo;
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printf("Foo@%p\n", static_cast<void*>(foop));
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foop->AddRef();
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*result = foop;
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printf("<<CreateFoo()\n");
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return NS_OK;
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}
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void
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set_a_Foo( RefPtr<Foo>* result )
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{
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printf(">>set_a_Foo()\n");
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assert(result);
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RefPtr<Foo> foop( do_QueryObject(new Foo) );
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*result = foop;
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printf("<<set_a_Foo()\n");
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}
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RefPtr<Foo>
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return_a_Foo()
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{
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printf(">>return_a_Foo()\n");
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RefPtr<Foo> foop( do_QueryObject(new Foo) );
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printf("<<return_a_Foo()\n");
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return foop;
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}
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#define NS_BAR_IID \
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{ 0x6f7652e1, 0xee43, 0x11d1, \
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{ 0x9c, 0xc3, 0x00, 0x60, 0x08, 0x8c, 0xa6, 0xb3 } }
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class Bar : public Foo
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_BAR_IID)
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public:
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Bar();
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virtual ~Bar();
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NS_IMETHOD QueryInterface( const nsIID&, void** ) override;
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virtual void VirtualMemberFunction( int, int*, int& ) override;
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virtual void VirtualConstMemberFunction( int, int*, int& ) const override;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(Bar, NS_BAR_IID)
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Bar::Bar()
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{
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printf(" new Bar@%p\n", static_cast<void*>(this));
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}
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Bar::~Bar()
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{
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printf("Bar@%p::~Bar()\n", static_cast<void*>(this));
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}
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nsresult
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Bar::QueryInterface( const nsID& aIID, void** aResult )
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{
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printf("Bar@%p::QueryInterface()\n", static_cast<void*>(this));
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nsISupports* rawPtr = 0;
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nsresult status = NS_OK;
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if ( aIID.Equals(NS_GET_IID(Bar)) )
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rawPtr = this;
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else if ( aIID.Equals(NS_GET_IID(Foo)) )
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rawPtr = static_cast<Foo*>(this);
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else
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{
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nsID iid_of_ISupports = NS_ISUPPORTS_IID;
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if ( aIID.Equals(iid_of_ISupports) )
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rawPtr = static_cast<nsISupports*>(this);
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else
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status = NS_ERROR_NO_INTERFACE;
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}
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NS_IF_ADDREF(rawPtr);
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*aResult = rawPtr;
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return status;
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}
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void
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Bar::VirtualMemberFunction( int aArg1, int* aArgPtr, int& aArgRef )
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{
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printf("override virtual member function is invoked.\n");
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}
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void
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Bar::VirtualConstMemberFunction( int aArg1, int* aArgPtr, int& aArgRef ) const
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{
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printf("override virtual const member function is invoked.\n");
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}
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nsresult
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CreateBar( void** result )
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// a typical factory function (that calls AddRef)
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{
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printf(">>CreateBar() --> ");
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Bar* barp = new Bar;
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printf("Bar@%p\n", static_cast<void*>(barp));
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barp->AddRef();
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*result = barp;
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printf("<<CreateBar()\n");
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return NS_OK;
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}
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void
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AnFooPtrPtrContext( Foo** )
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{
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}
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void
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AVoidPtrPtrContext( void** )
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{
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}
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void
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AnISupportsPtrPtrContext( nsISupports** )
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{
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}
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nsresult
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TestBloat_Raw_Unsafe()
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{
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Bar* barP = 0;
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nsresult result = CreateBar(reinterpret_cast<void**>(&barP));
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if ( barP )
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{
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Foo* fooP = 0;
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if ( NS_SUCCEEDED( result = barP->QueryInterface(NS_GET_IID(Foo), reinterpret_cast<void**>(&fooP)) ) )
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{
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fooP->print_totals();
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NS_RELEASE(fooP);
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}
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NS_RELEASE(barP);
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}
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return result;
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}
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static
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nsresult
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TestBloat_Smart()
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{
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RefPtr<Bar> barP;
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nsresult result = CreateBar( getter_AddRefs(barP) );
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RefPtr<Foo> fooP( do_QueryObject(barP, &result) );
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if ( fooP )
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fooP->print_totals();
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return result;
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}
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#define NS_INLINE_DECL_THREADSAFE_MUTABLE_REFCOUNTING(_class) \
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public: \
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NS_METHOD_(MozExternalRefCountType) AddRef(void) const { \
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MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
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MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
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nsrefcnt count = ++mRefCnt; \
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return (nsrefcnt) count; \
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} \
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NS_METHOD_(MozExternalRefCountType) Release(void) const { \
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MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
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nsrefcnt count = --mRefCnt; \
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if (count == 0) { \
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delete (this); \
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return 0; \
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} \
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return count; \
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} \
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protected: \
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mutable ::mozilla::ThreadSafeAutoRefCnt mRefCnt; \
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public:
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class ObjectForConstPtr
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{
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private:
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// Reference-counted classes cannot have public destructors.
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~ObjectForConstPtr()
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{
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printf("ObjectForConstPtr@%p::~ObjectForConstPtr()\n", static_cast<void*>(this));
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}
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public:
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NS_INLINE_DECL_THREADSAFE_MUTABLE_REFCOUNTING(ObjectForConstPtr)
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void ConstMemberFunction( int aArg1, int* aArgPtr, int& aArgRef ) const
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{
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printf("const member function is invoked by RefPtr<const T>->*.\n");
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}
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};
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#undef NS_INLINE_DECL_THREADSAFE_MUTABLE_REFCOUNTING
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RefPtr<Foo> gFoop;
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int
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main()
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{
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printf(">>main()\n");
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printf("sizeof(RefPtr<Foo>) --> %u\n", unsigned(sizeof(RefPtr<Foo>)));
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TestBloat_Raw_Unsafe();
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TestBloat_Smart();
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{
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printf("\n### Test 1: will a |nsCOMPtr| call |AddRef| on a pointer assigned into it?\n");
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RefPtr<Foo> foop( do_QueryObject(new Foo) );
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printf("\n### Test 2: will a |nsCOMPtr| |Release| its old pointer when a new one is assigned in?\n");
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foop = do_QueryObject(new Foo);
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// [Shouldn't compile] Is it a compile time error to try to |AddRef| by hand?
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//foop->AddRef();
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// [Shouldn't compile] Is it a compile time error to try to |Release| be hand?
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//foop->Release();
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// [Shouldn't compile] Is it a compile time error to try to |delete| an |nsCOMPtr|?
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//delete foop;
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printf("\n### Test 3: can you |AddRef| if you must?\n");
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static_cast<Foo*>(foop)->AddRef();
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printf("\n### Test 4: can you |Release| if you must?\n");
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static_cast<Foo*>(foop)->Release();
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printf("\n### Test 5: will a |nsCOMPtr| |Release| when it goes out of scope?\n");
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}
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{
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printf("\n### Test 6: will a |nsCOMPtr| call the correct destructor?\n");
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RefPtr<Foo> foop( do_QueryObject(new Bar) );
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mozilla::Unused << foop;
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}
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{
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printf("\n### Test 7: can you compare one |nsCOMPtr| with another [!=]?\n");
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RefPtr<Foo> foo1p( do_QueryObject(new Foo) );
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// [Shouldn't compile] Is it a compile time error to omit |getter_[doesnt_]AddRef[s]|?
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//AnFooPtrPtrContext(&foo1p);
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// [Shouldn't compile] Is it a compile time error to omit |getter_[doesnt_]AddRef[s]|?
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//AVoidPtrPtrContext(&foo1p);
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RefPtr<Foo> foo2p( do_QueryObject(new Foo) );
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if ( foo1p != foo2p )
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printf("foo1p != foo2p\n");
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else
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printf("foo1p == foo2p\n");
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printf("\n### Test 7.5: can you compare a |nsCOMPtr| with nullptr [!=]?\n");
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if ( foo1p != nullptr )
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printf("foo1p != nullptr\n");
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if ( nullptr != foo1p )
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printf("nullptr != foo1p\n");
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if ( foo1p == nullptr )
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printf("foo1p == nullptr\n");
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if ( nullptr == foo1p )
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printf("nullptr == foo1p\n");
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Foo* raw_foo2p = foo2p.get();
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printf("\n### Test 8: can you compare a |nsCOMPtr| with a raw interface pointer [!=]?\n");
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if ( foo1p.get() != raw_foo2p )
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printf("foo1p != raw_foo2p\n");
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else
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printf("foo1p == raw_foo2p\n");
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printf("\n### Test 9: can you assign one |nsCOMPtr| into another?\n");
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foo1p = foo2p;
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printf("\n### Test 10: can you compare one |nsCOMPtr| with another [==]?\n");
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if ( foo1p == foo2p )
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printf("foo1p == foo2p\n");
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else
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printf("foo1p != foo2p\n");
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printf("\n### Test 11: can you compare a |nsCOMPtr| with a raw interface pointer [==]?\n");
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if ( raw_foo2p == foo2p.get() )
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printf("raw_foo2p == foo2p\n");
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else
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printf("raw_foo2p != foo2p\n");
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#if 1
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printf("\n### Test 11.5: can you compare a |nsCOMPtr| with a raw interface pointer [==]?\n");
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if ( RefPtr<Foo>( raw_foo2p ) == foo2p )
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printf("raw_foo2p == foo2p\n");
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else
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printf("raw_foo2p != foo2p\n");
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#endif
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printf("\n### Test 12: bare pointer test?\n");
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if ( foo1p )
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printf("foo1p is not NULL\n");
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else
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printf("foo1p is NULL\n");
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printf("\n### Test 13: null pointer test?\n");
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if ( foo1p == nullptr )
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printf("foo1p is NULL\n");
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else
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printf("foo1p is not NULL\n");
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#if 0
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if ( foo1p == 1 )
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printf("foo1p allowed compare with in\n");
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#endif
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printf("\n### Test 14: how about when two |nsCOMPtr|s referring to the same object go out of scope?\n");
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}
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{
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printf("\n### Test 15,16 ...setup...\n");
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Foo* raw_foo1p = new Foo;
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raw_foo1p->AddRef();
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Foo* raw_foo2p = new Foo;
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raw_foo2p->AddRef();
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printf("\n### Test 15: what if I don't want to |AddRef| when I construct?\n");
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RefPtr<Foo> foo1p( dont_AddRef(raw_foo1p) );
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//RefPtr<Foo> foo1p = dont_AddRef(raw_foo1p);
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printf("\n### Test 16: what if I don't want to |AddRef| when I assign in?\n");
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RefPtr<Foo> foo2p;
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foo2p = dont_AddRef(raw_foo2p);
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}
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{
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printf("\n### setup for Test 17\n");
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RefPtr<Foo> foop;
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printf("### Test 17: basic parameter behavior?\n");
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CreateFoo( RefPtrGetterAddRefs<Foo>(foop) );
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}
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printf("### End Test 17\n");
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{
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printf("\n### setup for Test 18\n");
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RefPtr<Foo> foop;
|
|
printf("### Test 18: basic parameter behavior, using the short form?\n");
|
|
CreateFoo( getter_AddRefs(foop) );
|
|
}
|
|
printf("### End Test 18\n");
|
|
|
|
|
|
{
|
|
printf("\n### setup for Test 19, 20\n");
|
|
RefPtr<Foo> foop;
|
|
printf("### Test 19: reference parameter behavior?\n");
|
|
set_a_Foo(address_of(foop));
|
|
|
|
printf("### Test 20: return value behavior?\n");
|
|
foop = return_a_Foo();
|
|
}
|
|
printf("### End Test 19, 20\n");
|
|
|
|
{
|
|
printf("\n### setup for Test 21\n");
|
|
RefPtr<Foo> fooP;
|
|
|
|
printf("### Test 21: is |QueryInterface| called on assigning in a raw pointer?\n");
|
|
fooP = do_QueryObject(new Foo);
|
|
}
|
|
printf("### End Test 21\n");
|
|
|
|
{
|
|
printf("\n### setup for Test 22\n");
|
|
RefPtr<Foo> fooP;
|
|
fooP = do_QueryObject(new Foo);
|
|
|
|
RefPtr<Foo> foo2P;
|
|
|
|
printf("### Test 22: is |QueryInterface| _not_ called when assigning in a smart-pointer of the same type?\n");
|
|
foo2P = fooP;
|
|
}
|
|
printf("### End Test 22\n");
|
|
|
|
{
|
|
printf("\n### setup for Test 23\n");
|
|
RefPtr<Bar> barP( do_QueryObject(new Bar) );
|
|
|
|
printf("### Test 23: is |QueryInterface| called when assigning in a smart-pointer of a different type?\n");
|
|
|
|
RefPtr<Foo> fooP( do_QueryObject(barP) );
|
|
if ( fooP )
|
|
printf("an Bar* is an Foo*\n");
|
|
}
|
|
printf("### End Test 23\n");
|
|
|
|
|
|
{
|
|
printf("\n### setup for Test 24\n");
|
|
RefPtr<Foo> fooP( do_QueryObject(new Foo) );
|
|
|
|
printf("### Test 24: does |forget| avoid an AddRef/Release when assigning to another nsCOMPtr?\n");
|
|
RefPtr<Foo> fooP2( fooP.forget() );
|
|
}
|
|
printf("### End Test 24\n");
|
|
|
|
{
|
|
RefPtr<Foo> fooP;
|
|
|
|
AnFooPtrPtrContext( getter_AddRefs(fooP) );
|
|
AVoidPtrPtrContext( getter_AddRefs(fooP) );
|
|
}
|
|
|
|
{
|
|
printf("\n### setup for Test 25\n");
|
|
RefPtr<Foo> fooP(new Foo);
|
|
|
|
printf("### Test 25: can you construct an |RefPtr<const T>| from an |RefPtr<T>|?\n");
|
|
RefPtr<const Foo> constFooP = fooP;
|
|
|
|
printf("### Test 25: can you call a non-const method on an |RefPtr<const T>|?\n");
|
|
constFooP->ConstMethod();
|
|
|
|
// [Shouldn't compile] Is it a compile time error to call a non-const method on an |RefPtr<const T>|?
|
|
//constFooP->NonconstMethod();
|
|
|
|
// [Shouldn't compile] Is it a compile time error to construct an |RefPtr<T> from an |RefPtr<const T>|?
|
|
//RefPtr<Foo> otherFooP(constFooP);
|
|
}
|
|
|
|
|
|
printf("\n### Test 26: will a static |nsCOMPtr| |Release| before program termination?\n");
|
|
gFoop = do_QueryObject(new Foo);
|
|
|
|
{
|
|
printf("\n### setup for Test 26, 27, 28\n");
|
|
RefPtr<Foo> foop = new Foo;
|
|
RefPtr<Foo> foop2 = new Bar;
|
|
RefPtr<const ObjectForConstPtr> foop3 = new ObjectForConstPtr;
|
|
int test = 1;
|
|
void (Foo::*fPtr)( int, int*, int& ) = &Foo::MemberFunction;
|
|
void (Foo::*fVPtr)( int, int*, int& ) = &Foo::VirtualMemberFunction;
|
|
void (Foo::*fVCPtr)( int, int*, int& ) const = &Foo::VirtualConstMemberFunction;
|
|
void (ObjectForConstPtr::*fCPtr2)( int, int*, int& ) const = &ObjectForConstPtr::ConstMemberFunction;
|
|
|
|
printf("### Test 26: invoke member function via operator ->*\n");
|
|
(foop->*fPtr)(test, &test, test);
|
|
printf("### End Test 26\n");
|
|
|
|
printf("### Test 27: invoke virtual / virtual const member function via operator ->*\n");
|
|
(foop2->*fVPtr)(test, &test, test);
|
|
(foop2->*fVCPtr)(test, &test, test);
|
|
printf("### End Test 27\n");
|
|
|
|
printf("### Test 28: invoke virtual const member function via RefPtr<const T> operator ->*\n");
|
|
(foop3->*fCPtr2)(test, &test, test);
|
|
printf("### End Test 28\n");
|
|
}
|
|
|
|
|
|
printf("<<main()\n");
|
|
return 0;
|
|
}
|
|
|