/usr/include/thunderbird/nsIWeakReferenceUtils.h is in thunderbird-dev 1:24.4.0+build1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 nsIWeakReferenceUtils_h__
#define nsIWeakReferenceUtils_h__
#ifndef nsCOMPtr_h__
#include "nsCOMPtr.h"
#endif
#include "nsIWeakReference.h"
typedef nsCOMPtr<nsIWeakReference> nsWeakPtr;
/**
*
*/
// a type-safe shortcut for calling the |QueryReferent()| member function
// T must inherit from nsIWeakReference, but the cast may be ambiguous.
template <class T, class DestinationType>
inline
nsresult
CallQueryReferent( T* aSource, DestinationType** aDestination )
{
NS_PRECONDITION(aSource, "null parameter");
NS_PRECONDITION(aDestination, "null parameter");
return aSource->QueryReferent(NS_GET_TEMPLATE_IID(DestinationType),
reinterpret_cast<void**>(aDestination));
}
class NS_COM_GLUE nsQueryReferent : public nsCOMPtr_helper
{
public:
nsQueryReferent( nsIWeakReference* aWeakPtr, nsresult* error )
: mWeakPtr(aWeakPtr),
mErrorPtr(error)
{
// nothing else to do here
}
virtual nsresult NS_FASTCALL operator()( const nsIID& aIID, void** ) const;
private:
nsIWeakReference* mWeakPtr;
nsresult* mErrorPtr;
};
inline
const nsQueryReferent
do_QueryReferent( nsIWeakReference* aRawPtr, nsresult* error = 0 )
{
return nsQueryReferent(aRawPtr, error);
}
/**
* Deprecated, use |do_GetWeakReference| instead.
*/
extern NS_COM_GLUE
nsIWeakReference*
NS_GetWeakReference( nsISupports* , nsresult* aResult=0 );
/**
* |do_GetWeakReference| is a convenience function that bundles up all the work needed
* to get a weak reference to an arbitrary object, i.e., the |QueryInterface|, test, and
* call through to |GetWeakReference|, and put it into your |nsCOMPtr|.
* It is specifically designed to cooperate with |nsCOMPtr| (or |nsWeakPtr|) like so:
* |nsWeakPtr myWeakPtr = do_GetWeakReference(aPtr);|.
*/
inline
already_AddRefed<nsIWeakReference>
do_GetWeakReference( nsISupports* aRawPtr, nsresult* error = 0 )
{
return dont_AddRef(NS_GetWeakReference(aRawPtr, error));
}
inline
void
do_GetWeakReference( nsIWeakReference* aRawPtr, nsresult* error = 0 )
{
// This signature exists solely to _stop_ you from doing a bad thing.
// Saying |do_GetWeakReference()| on a weak reference itself,
// is very likely to be a programmer error.
}
template <class T>
inline
void
do_GetWeakReference( already_AddRefed<T>& )
{
// This signature exists solely to _stop_ you from doing the bad thing.
// Saying |do_GetWeakReference()| on a pointer that is not otherwise owned by
// someone else is an automatic leak. See <http://bugzilla.mozilla.org/show_bug.cgi?id=8221>.
}
template <class T>
inline
void
do_GetWeakReference( already_AddRefed<T>&, nsresult* )
{
// This signature exists solely to _stop_ you from doing the bad thing.
// Saying |do_GetWeakReference()| on a pointer that is not otherwise owned by
// someone else is an automatic leak. See <http://bugzilla.mozilla.org/show_bug.cgi?id=8221>.
}
#endif
|