mfbt/Range.h@97036ab72558 (annotated)
mfbt/Range.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.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef mozilla_Range_h |
| michael@0 | 8 | #define mozilla_Range_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "mozilla/NullPtr.h" |
| michael@0 | 11 | #include "mozilla/RangedPtr.h" |
| michael@0 | 12 | |
| michael@0 | 13 | #include <stddef.h> |
| michael@0 | 14 | |
| michael@0 | 15 | namespace mozilla { |
| michael@0 | 16 | |
| michael@0 | 17 | // Range<T> is a tuple containing a pointer and a length. |
| michael@0 | 18 | template <typename T> |
| michael@0 | 19 | class Range |
| michael@0 | 20 | { |
| michael@0 | 21 | RangedPtr<T> mStart; |
| michael@0 | 22 | RangedPtr<T> mEnd; |
| michael@0 | 23 | |
| michael@0 | 24 | typedef void (Range::* ConvertibleToBool)(); |
| michael@0 | 25 | void nonNull() {} |
| michael@0 | 26 | |
| michael@0 | 27 | public: |
| michael@0 | 28 | Range() : mStart(nullptr, 0), mEnd(nullptr, 0) {} |
| michael@0 | 29 | Range(T* p, size_t len) |
| michael@0 | 30 | : mStart(p, p, p + len), |
| michael@0 | 31 | mEnd(p + len, p, p + len) |
| michael@0 | 32 | {} |
| michael@0 | 33 | |
| michael@0 | 34 | RangedPtr<T> start() const { return mStart; } |
| michael@0 | 35 | RangedPtr<T> end() const { return mEnd; } |
| michael@0 | 36 | size_t length() const { return mEnd - mStart; } |
| michael@0 | 37 | |
| michael@0 | 38 | T& operator[](size_t offset) { |
| michael@0 | 39 | return mStart[offset]; |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | const T& operator[](size_t offset) const { |
| michael@0 | 43 | return mStart[offset]; |
| michael@0 | 44 | } |
| michael@0 | 45 | |
| michael@0 | 46 | operator ConvertibleToBool() const { return mStart ? &Range::nonNull : 0; } |
| michael@0 | 47 | }; |
| michael@0 | 48 | |
| michael@0 | 49 | } // namespace mozilla |
| michael@0 | 50 | |
| michael@0 | 51 | #endif /* mozilla_Range_h */ |
