js/src/jit/FixedList.h@129ffea94266 (annotated)
js/src/jit/FixedList.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| michael@0 | 2 | * vim: set ts=8 sts=4 et sw=4 tw=99: |
| 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 jit_FixedList_h |
| michael@0 | 8 | #define jit_FixedList_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include <stddef.h> |
| michael@0 | 11 | |
| michael@0 | 12 | #include "jit/Ion.h" |
| michael@0 | 13 | #include "jit/IonAllocPolicy.h" |
| michael@0 | 14 | |
| michael@0 | 15 | namespace js { |
| michael@0 | 16 | namespace jit { |
| michael@0 | 17 | |
| michael@0 | 18 | // List of a fixed length, but the length is unknown until runtime. |
| michael@0 | 19 | template <typename T> |
| michael@0 | 20 | class FixedList |
| michael@0 | 21 | { |
| michael@0 | 22 | T *list_; |
| michael@0 | 23 | size_t length_; |
| michael@0 | 24 | |
| michael@0 | 25 | private: |
| michael@0 | 26 | FixedList(const FixedList&); // no copy definition. |
| michael@0 | 27 | void operator= (const FixedList*); // no assignment definition. |
| michael@0 | 28 | |
| michael@0 | 29 | public: |
| michael@0 | 30 | FixedList() |
| michael@0 | 31 | : list_(nullptr), length_(0) |
| michael@0 | 32 | { } |
| michael@0 | 33 | |
| michael@0 | 34 | // Dynamic memory allocation requires the ability to report failure. |
| michael@0 | 35 | bool init(TempAllocator &alloc, size_t length) { |
| michael@0 | 36 | length_ = length; |
| michael@0 | 37 | if (length == 0) |
| michael@0 | 38 | return true; |
| michael@0 | 39 | |
| michael@0 | 40 | if (length & mozilla::tl::MulOverflowMask<sizeof(T)>::value) |
| michael@0 | 41 | return false; |
| michael@0 | 42 | list_ = (T *)alloc.allocate(length * sizeof(T)); |
| michael@0 | 43 | return list_ != nullptr; |
| michael@0 | 44 | } |
| michael@0 | 45 | |
| michael@0 | 46 | size_t length() const { |
| michael@0 | 47 | return length_; |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | void shrink(size_t num) { |
| michael@0 | 51 | JS_ASSERT(num < length_); |
| michael@0 | 52 | length_ -= num; |
| michael@0 | 53 | } |
| michael@0 | 54 | |
| michael@0 | 55 | bool growBy(TempAllocator &alloc, size_t num) { |
| michael@0 | 56 | size_t newlength = length_ + num; |
| michael@0 | 57 | if (newlength < length_) |
| michael@0 | 58 | return false; |
| michael@0 | 59 | if (newlength & mozilla::tl::MulOverflowMask<sizeof(T)>::value) |
| michael@0 | 60 | return false; |
| michael@0 | 61 | T *list = (T *)alloc.allocate((length_ + num) * sizeof(T)); |
| michael@0 | 62 | if (!list) |
| michael@0 | 63 | return false; |
| michael@0 | 64 | |
| michael@0 | 65 | for (size_t i = 0; i < length_; i++) |
| michael@0 | 66 | list[i] = list_[i]; |
| michael@0 | 67 | |
| michael@0 | 68 | length_ += num; |
| michael@0 | 69 | list_ = list; |
| michael@0 | 70 | return true; |
| michael@0 | 71 | } |
| michael@0 | 72 | |
| michael@0 | 73 | T &operator[](size_t index) { |
| michael@0 | 74 | JS_ASSERT(index < length_); |
| michael@0 | 75 | return list_[index]; |
| michael@0 | 76 | } |
| michael@0 | 77 | const T &operator [](size_t index) const { |
| michael@0 | 78 | JS_ASSERT(index < length_); |
| michael@0 | 79 | return list_[index]; |
| michael@0 | 80 | } |
| michael@0 | 81 | }; |
| michael@0 | 82 | |
| michael@0 | 83 | } // namespace jit |
| michael@0 | 84 | } // namespace js |
| michael@0 | 85 | |
| michael@0 | 86 | #endif /* jit_FixedList_h */ |
