gecko-dev/layout/base/FramePropertyTable.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2012-05-21 11:12:37 +00:00
* 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/. */
#include "FramePropertyTable.h"
#include "mozilla/MemoryReporting.h"
namespace mozilla {
void
FramePropertyTable::Set(nsIFrame* aFrame, const FramePropertyDescriptor* aProperty,
void* aValue)
{
NS_ASSERTION(aFrame, "Null frame?");
NS_ASSERTION(aProperty, "Null property?");
if (mLastFrame != aFrame || !mLastEntry) {
mLastFrame = aFrame;
mLastEntry = mEntries.PutEntry(aFrame);
}
Entry* entry = mLastEntry;
if (!entry->mProp.IsArray()) {
if (!entry->mProp.mProperty) {
// Empty entry, so we can just store our property in the empty slot
entry->mProp.mProperty = aProperty;
entry->mProp.mValue = aValue;
return;
}
if (entry->mProp.mProperty == aProperty) {
// Just overwrite the current value
entry->mProp.DestroyValueFor(aFrame);
entry->mProp.mValue = aValue;
return;
}
// We need to expand the single current entry to an array
PropertyValue current = entry->mProp;
entry->mProp.mProperty = nullptr;
Bug 895322 - Part 1: Replace the usages of MOZ_STATIC_ASSERT with C++11 static_assert; r=Waldo This patch was mostly generated by running the following scripts on the codebase, with some manual changes made afterwards: # static_assert.sh #!/bin/bash # Command to convert an NSPR integer type to the equivalent standard integer type function convert() { echo "Converting $1 to $2..." find . ! -wholename "*nsprpub*" \ ! -wholename "*security/nss*" \ ! -wholename "*/.hg*" \ ! -wholename "obj-ff-dbg*" \ ! -name nsXPCOMCID.h \ ! -name prtypes.h \ -type f \ \( -iname "*.cpp" \ -o -iname "*.h" \ -o -iname "*.cc" \ -o -iname "*.mm" \) | \ xargs -n 1 `dirname $0`/assert_replacer.py #sed -i -e "s/\b$1\b/$2/g" } convert MOZ_STATIC_ASSERT static_assert hg rev --no-backup mfbt/Assertions.h \ media/webrtc/signaling/src/sipcc/core/includes/ccapi.h \ modules/libmar/src/mar_private.h \ modules/libmar/src/mar.h # assert_replacer.py #!/usr/bin/python import sys import re pattern = re.compile(r"\bMOZ_STATIC_ASSERT\b") def replaceInPlace(fname): print fname f = open(fname, "rw+") lines = f.readlines() for i in range(0, len(lines)): while True: index = re.search(pattern, lines[i]) if index != None: index = index.start() lines[i] = lines[i][0:index] + "static_assert" + lines[i][index+len("MOZ_STATIC_ASSERT"):] for j in range(i + 1, len(lines)): if lines[j].find(" ", index) == index: lines[j] = lines[j][0:index] + lines[j][index+4:] else: break else: break f.seek(0, 0) f.truncate() f.write("".join(lines)) f.close() argc = len(sys.argv) for i in range(1, argc): replaceInPlace(sys.argv[i]) --HG-- extra : rebase_source : 4b4a4047d82f2c205b9fad8d56dfc3f1afc0b045
2013-07-18 17:59:53 +00:00
static_assert(sizeof(nsTArray<PropertyValue>) <= sizeof(void *),
"Property array must fit entirely within entry->mProp.mValue");
new (&entry->mProp.mValue) nsTArray<PropertyValue>(4);
entry->mProp.ToArray()->AppendElement(current);
}
nsTArray<PropertyValue>* array = entry->mProp.ToArray();
nsTArray<PropertyValue>::index_type index =
array->IndexOf(aProperty, 0, PropertyComparator());
if (index != nsTArray<PropertyValue>::NoIndex) {
PropertyValue* pv = &array->ElementAt(index);
pv->DestroyValueFor(aFrame);
pv->mValue = aValue;
return;
}
array->AppendElement(PropertyValue(aProperty, aValue));
}
void*
FramePropertyTable::Get(const nsIFrame* aFrame,
const FramePropertyDescriptor* aProperty,
bool* aFoundResult)
{
NS_ASSERTION(aFrame, "Null frame?");
NS_ASSERTION(aProperty, "Null property?");
if (aFoundResult) {
*aFoundResult = false;
}
if (mLastFrame != aFrame) {
mLastFrame = const_cast<nsIFrame*>(aFrame);
mLastEntry = mEntries.GetEntry(mLastFrame);
}
Entry* entry = mLastEntry;
if (!entry)
return nullptr;
if (entry->mProp.mProperty == aProperty) {
if (aFoundResult) {
*aFoundResult = true;
}
return entry->mProp.mValue;
}
if (!entry->mProp.IsArray()) {
// There's just one property and it's not the one we want, bail
return nullptr;
}
nsTArray<PropertyValue>* array = entry->mProp.ToArray();
nsTArray<PropertyValue>::index_type index =
array->IndexOf(aProperty, 0, PropertyComparator());
if (index == nsTArray<PropertyValue>::NoIndex)
return nullptr;
if (aFoundResult) {
*aFoundResult = true;
}
return array->ElementAt(index).mValue;
}
void*
FramePropertyTable::Remove(nsIFrame* aFrame, const FramePropertyDescriptor* aProperty,
bool* aFoundResult)
{
NS_ASSERTION(aFrame, "Null frame?");
NS_ASSERTION(aProperty, "Null property?");
if (aFoundResult) {
*aFoundResult = false;
}
if (mLastFrame != aFrame) {
mLastFrame = aFrame;
mLastEntry = mEntries.GetEntry(aFrame);
}
Entry* entry = mLastEntry;
if (!entry)
return nullptr;
if (entry->mProp.mProperty == aProperty) {
// There's only one entry and it's the one we want
void* value = entry->mProp.mValue;
mEntries.RawRemoveEntry(entry);
mLastEntry = nullptr;
if (aFoundResult) {
*aFoundResult = true;
}
return value;
}
if (!entry->mProp.IsArray()) {
// There's just one property and it's not the one we want, bail
return nullptr;
}
nsTArray<PropertyValue>* array = entry->mProp.ToArray();
nsTArray<PropertyValue>::index_type index =
array->IndexOf(aProperty, 0, PropertyComparator());
if (index == nsTArray<PropertyValue>::NoIndex) {
// No such property, bail
return nullptr;
}
if (aFoundResult) {
*aFoundResult = true;
}
void* result = array->ElementAt(index).mValue;
uint32_t last = array->Length() - 1;
array->ElementAt(index) = array->ElementAt(last);
array->RemoveElementAt(last);
if (last == 1) {
PropertyValue pv = array->ElementAt(0);
array->~nsTArray<PropertyValue>();
entry->mProp = pv;
}
return result;
}
void
FramePropertyTable::Delete(nsIFrame* aFrame, const FramePropertyDescriptor* aProperty)
{
NS_ASSERTION(aFrame, "Null frame?");
NS_ASSERTION(aProperty, "Null property?");
bool found;
void* v = Remove(aFrame, aProperty, &found);
if (found) {
PropertyValue pv(aProperty, v);
pv.DestroyValueFor(aFrame);
}
}
/* static */ void
FramePropertyTable::DeleteAllForEntry(Entry* aEntry)
{
if (!aEntry->mProp.IsArray()) {
aEntry->mProp.DestroyValueFor(aEntry->GetKey());
return;
}
nsTArray<PropertyValue>* array = aEntry->mProp.ToArray();
for (uint32_t i = 0; i < array->Length(); ++i) {
array->ElementAt(i).DestroyValueFor(aEntry->GetKey());
}
array->~nsTArray<PropertyValue>();
}
void
FramePropertyTable::DeleteAllFor(nsIFrame* aFrame)
{
NS_ASSERTION(aFrame, "Null frame?");
Entry* entry = mEntries.GetEntry(aFrame);
if (!entry)
return;
if (mLastFrame == aFrame) {
// Flush cache. We assume DeleteAllForEntry will be called before
// a frame is destroyed.
mLastFrame = nullptr;
mLastEntry = nullptr;
}
DeleteAllForEntry(entry);
mEntries.RawRemoveEntry(entry);
}
/* static */ PLDHashOperator
FramePropertyTable::DeleteEnumerator(Entry* aEntry, void* aArg)
{
DeleteAllForEntry(aEntry);
return PL_DHASH_REMOVE;
}
void
FramePropertyTable::DeleteAll()
{
mLastFrame = nullptr;
mLastEntry = nullptr;
mEntries.EnumerateEntries(DeleteEnumerator, nullptr);
}
size_t
FramePropertyTable::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
return mEntries.SizeOfExcludingThis(SizeOfPropertyTableEntryExcludingThis,
aMallocSizeOf);
}
/* static */ size_t
FramePropertyTable::SizeOfPropertyTableEntryExcludingThis(Entry* aEntry,
mozilla::MallocSizeOf aMallocSizeOf, void *)
{
return aEntry->mProp.SizeOfExcludingThis(aMallocSizeOf);
}
}