layout/style/nsRuleData.cpp@925c144e1f1f (annotated)
layout/style/nsRuleData.cpp
Fri, 16 Jan 2015 18:13:44 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 18:13:44 +0100
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
- permissions
- -rw-r--r--
Integrate suggestion from review to improve consistency with existing code.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "nsRuleData.h" |
| michael@0 | 7 | |
| michael@0 | 8 | #include "mozilla/Poison.h" |
| michael@0 | 9 | #include <stdint.h> |
| michael@0 | 10 | |
| michael@0 | 11 | inline size_t |
| michael@0 | 12 | nsRuleData::GetPoisonOffset() |
| michael@0 | 13 | { |
| michael@0 | 14 | // Fill in mValueOffsets such that mValueStorage + mValueOffsets[i] |
| michael@0 | 15 | // will yield the frame poison value for all uninitialized value |
| michael@0 | 16 | // offsets. |
| michael@0 | 17 | static_assert(sizeof(uintptr_t) == sizeof(size_t), |
| michael@0 | 18 | "expect uintptr_t and size_t to be the same size"); |
| michael@0 | 19 | static_assert(uintptr_t(-1) > uintptr_t(0), |
| michael@0 | 20 | "expect uintptr_t to be unsigned"); |
| michael@0 | 21 | static_assert(size_t(-1) > size_t(0), |
| michael@0 | 22 | "expect size_t to be unsigned"); |
| michael@0 | 23 | uintptr_t framePoisonValue = mozPoisonValue(); |
| michael@0 | 24 | return size_t(framePoisonValue - uintptr_t(mValueStorage)) / |
| michael@0 | 25 | sizeof(nsCSSValue); |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | nsRuleData::nsRuleData(uint32_t aSIDs, nsCSSValue* aValueStorage, |
| michael@0 | 29 | nsPresContext* aContext, nsStyleContext* aStyleContext) |
| michael@0 | 30 | : mSIDs(aSIDs), |
| michael@0 | 31 | mCanStoreInRuleTree(true), |
| michael@0 | 32 | mPresContext(aContext), |
| michael@0 | 33 | mStyleContext(aStyleContext), |
| michael@0 | 34 | mValueStorage(aValueStorage) |
| michael@0 | 35 | { |
| michael@0 | 36 | #ifndef MOZ_VALGRIND |
| michael@0 | 37 | size_t framePoisonOffset = GetPoisonOffset(); |
| michael@0 | 38 | for (size_t i = 0; i < nsStyleStructID_Length; ++i) { |
| michael@0 | 39 | mValueOffsets[i] = framePoisonOffset; |
| michael@0 | 40 | } |
| michael@0 | 41 | #endif |
| michael@0 | 42 | } |
| michael@0 | 43 | |
| michael@0 | 44 | #ifdef DEBUG |
| michael@0 | 45 | nsRuleData::~nsRuleData() |
| michael@0 | 46 | { |
| michael@0 | 47 | #ifndef MOZ_VALGRIND |
| michael@0 | 48 | // assert nothing in mSIDs has poison value |
| michael@0 | 49 | size_t framePoisonOffset = GetPoisonOffset(); |
| michael@0 | 50 | for (size_t i = 0; i < nsStyleStructID_Length; ++i) { |
| michael@0 | 51 | NS_ABORT_IF_FALSE(!(mSIDs & (1 << i)) || |
| michael@0 | 52 | mValueOffsets[i] != framePoisonOffset, |
| michael@0 | 53 | "value in SIDs was left with poison offset"); |
| michael@0 | 54 | } |
| michael@0 | 55 | #endif |
| michael@0 | 56 | } |
| michael@0 | 57 | #endif |
