xpcom/glue/nsIInterfaceRequestorUtils.h@97036ab72558
xpcom/glue/nsIInterfaceRequestorUtils.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #ifndef __nsInterfaceRequestorUtils_h
8 #define __nsInterfaceRequestorUtils_h
10 #include "nsCOMPtr.h"
12 // a type-safe shortcut for calling the |GetInterface()| member function
13 // T must inherit from nsIInterfaceRequestor, but the cast may be ambiguous.
14 template <class T, class DestinationType>
15 inline
16 nsresult
17 CallGetInterface( T* aSource, DestinationType** aDestination )
18 {
19 NS_PRECONDITION(aSource, "null parameter");
20 NS_PRECONDITION(aDestination, "null parameter");
22 return aSource->GetInterface(NS_GET_TEMPLATE_IID(DestinationType),
23 reinterpret_cast<void**>(aDestination));
24 }
26 class NS_COM_GLUE nsGetInterface : public nsCOMPtr_helper
27 {
28 public:
29 nsGetInterface( nsISupports* aSource, nsresult* error )
30 : mSource(aSource),
31 mErrorPtr(error)
32 {
33 // nothing else to do here
34 }
36 virtual nsresult NS_FASTCALL operator()( const nsIID&, void** ) const;
38 private:
39 nsISupports* mSource;
40 nsresult* mErrorPtr;
41 };
43 inline
44 const nsGetInterface
45 do_GetInterface( nsISupports* aSource, nsresult* error = 0 )
46 {
47 return nsGetInterface(aSource, error);
48 }
50 #endif // __nsInterfaceRequestorUtils_h
