gecko-dev/xpcom/glue/nsISupportsUtils.h
Nathan Froyd 01583602a9 Bug 1207245 - part 6 - rename nsRefPtr<T> to RefPtr<T>; r=ehsan; a=Tomcat
The bulk of this commit was generated with a script, executed at the top
level of a typical source code checkout.  The only non-machine-generated
part was modifying MFBT's moz.build to reflect the new naming.

CLOSED TREE makes big refactorings like this a piece of cake.

 # The main substitution.
find . -name '*.cpp' -o -name '*.cc' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \
    xargs perl -p -i -e '
 s/nsRefPtr\.h/RefPtr\.h/g; # handle includes
 s/nsRefPtr ?</RefPtr</g;   # handle declarations and variables
'

 # Handle a special friend declaration in gfx/layers/AtomicRefCountedWithFinalize.h.
perl -p -i -e 's/::nsRefPtr;/::RefPtr;/' gfx/layers/AtomicRefCountedWithFinalize.h

 # Handle nsRefPtr.h itself, a couple places that define constructors
 # from nsRefPtr, and code generators specially.  We do this here, rather
 # than indiscriminantly s/nsRefPtr/RefPtr/, because that would rename
 # things like nsRefPtrHashtable.
perl -p -i -e 's/nsRefPtr/RefPtr/g' \
     mfbt/nsRefPtr.h \
     xpcom/glue/nsCOMPtr.h \
     xpcom/base/OwningNonNull.h \
     ipc/ipdl/ipdl/lower.py \
     ipc/ipdl/ipdl/builtin.py \
     dom/bindings/Codegen.py \
     python/lldbutils/lldbutils/utils.py

 # In our indiscriminate substitution above, we renamed
 # nsRefPtrGetterAddRefs, the class behind getter_AddRefs.  Fix that up.
find . -name '*.cpp' -o -name '*.h' -o -name '*.idl' | \
    xargs perl -p -i -e 's/nsRefPtrGetterAddRefs/RefPtrGetterAddRefs/g'

if [ -d .git ]; then
    git mv mfbt/nsRefPtr.h mfbt/RefPtr.h
else
    hg mv mfbt/nsRefPtr.h mfbt/RefPtr.h
fi

--HG--
rename : mfbt/nsRefPtr.h => mfbt/RefPtr.h
2015-10-18 01:24:48 -04:00

146 lines
5.2 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsISupportsUtils_h__
#define nsISupportsUtils_h__
#include "nscore.h"
#include "nsISupportsBase.h"
#include "nsError.h"
#include "nsDebug.h"
#include "nsISupportsImpl.h"
#include "mozilla/RefPtr.h"
#include "mozilla/TypeTraits.h"
/**
* Macro for adding a reference to an interface.
* @param _ptr The interface pointer.
*/
#define NS_ADDREF(_ptr) \
(_ptr)->AddRef()
/**
* Macro for adding a reference to this. This macro should be used
* because NS_ADDREF (when tracing) may require an ambiguous cast
* from the pointers primary type to nsISupports. This macro sidesteps
* that entire problem.
*/
#define NS_ADDREF_THIS() \
AddRef()
// Making this a |inline| |template| allows |aExpr| to be evaluated only once,
// yet still denies you the ability to |AddRef()| an |nsCOMPtr|.
template<class T>
inline void
ns_if_addref(T aExpr)
{
if (aExpr) {
aExpr->AddRef();
}
}
/**
* Macro for adding a reference to an interface that checks for nullptr.
* @param _expr The interface pointer.
*/
#define NS_IF_ADDREF(_expr) ns_if_addref(_expr)
/*
* Given these declarations, it explicitly OK and efficient to end a `getter' with:
*
* NS_IF_ADDREF(*result = mThing);
*
* even if |mThing| is an |nsCOMPtr|. If |mThing| is an |nsCOMPtr|, however, it is still
* _illegal_ to say |NS_IF_ADDREF(mThing)|.
*/
/**
* Macro for releasing a reference to an interface.
* @param _ptr The interface pointer.
*/
#define NS_RELEASE(_ptr) \
do { \
(_ptr)->Release(); \
(_ptr) = 0; \
} while (0)
/**
* Macro for releasing a reference to this interface.
*/
#define NS_RELEASE_THIS() \
Release()
/**
* Macro for releasing a reference to an interface, except that this
* macro preserves the return value from the underlying Release call.
* The interface pointer argument will only be NULLed if the reference count
* goes to zero.
*
* @param _ptr The interface pointer.
* @param _rc The reference count.
*/
#define NS_RELEASE2(_ptr, _rc) \
do { \
_rc = (_ptr)->Release(); \
if (0 == (_rc)) (_ptr) = 0; \
} while (0)
/**
* Macro for releasing a reference to an interface that checks for nullptr;
* @param _ptr The interface pointer.
*/
#define NS_IF_RELEASE(_ptr) \
do { \
if (_ptr) { \
(_ptr)->Release(); \
(_ptr) = 0; \
} \
} while (0)
/*
* Often you have to cast an implementation pointer, e.g., |this|, to an
* |nsISupports*|, but because you have multiple inheritance, a simple cast
* is ambiguous. One could simply say, e.g., (given a base |nsIBase|),
* |static_cast<nsIBase*>(this)|; but that disguises the fact that what
* you are really doing is disambiguating the |nsISupports|. You could make
* that more obvious with a double cast, e.g., |static_cast<nsISupports*>
(* static_cast<nsIBase*>(this))|, but that is bulky and harder to read...
*
* The following macro is clean, short, and obvious. In the example above,
* you would use it like this: |NS_ISUPPORTS_CAST(nsIBase*, this)|.
*/
#define NS_ISUPPORTS_CAST(__unambiguousBase, __expr) \
static_cast<nsISupports*>(static_cast<__unambiguousBase>(__expr))
// a type-safe shortcut for calling the |QueryInterface()| member function
template<class T, class DestinationType>
inline nsresult
CallQueryInterface(T* aSource, DestinationType** aDestination)
{
// We permit nsISupports-to-nsISupports here so that one can still obtain
// the canonical nsISupports pointer with CallQueryInterface.
static_assert(!mozilla::IsSame<T, DestinationType>::value ||
mozilla::IsSame<DestinationType, nsISupports>::value,
"don't use CallQueryInterface for compile-time-determinable casts");
NS_PRECONDITION(aSource, "null parameter");
NS_PRECONDITION(aDestination, "null parameter");
return aSource->QueryInterface(NS_GET_TEMPLATE_IID(DestinationType),
reinterpret_cast<void**>(aDestination));
}
template <class SourceType, class DestinationType>
inline nsresult
CallQueryInterface(RefPtr<SourceType>& aSourcePtr, DestinationType** aDestPtr)
{
return CallQueryInterface(aSourcePtr.get(), aDestPtr);
}
#endif /* __nsISupportsUtils_h */