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-rw-r--r--dom/xslt/xpath/txResultRecycler.cpp216
1 files changed, 216 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txResultRecycler.cpp b/dom/xslt/xpath/txResultRecycler.cpp
new file mode 100644
index 000000000..774a0345c
--- /dev/null
+++ b/dom/xslt/xpath/txResultRecycler.cpp
@@ -0,0 +1,216 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 "txResultRecycler.h"
+#include "txExprResult.h"
+#include "txNodeSet.h"
+
+txResultRecycler::txResultRecycler()
+ : mEmptyStringResult(new StringResult(nullptr)),
+ mTrueResult(new BooleanResult(true)),
+ mFalseResult(new BooleanResult(false))
+{
+}
+
+txResultRecycler::~txResultRecycler()
+{
+ txStackIterator stringIter(&mStringResults);
+ while (stringIter.hasNext()) {
+ delete static_cast<StringResult*>(stringIter.next());
+ }
+ txStackIterator nodesetIter(&mNodeSetResults);
+ while (nodesetIter.hasNext()) {
+ delete static_cast<txNodeSet*>(nodesetIter.next());
+ }
+ txStackIterator numberIter(&mNumberResults);
+ while (numberIter.hasNext()) {
+ delete static_cast<NumberResult*>(numberIter.next());
+ }
+}
+
+
+void
+txResultRecycler::recycle(txAExprResult* aResult)
+{
+ NS_ASSERTION(aResult->mRefCnt == 0, "In-use txAExprResult recycled");
+ RefPtr<txResultRecycler> kungFuDeathGrip;
+ aResult->mRecycler.swap(kungFuDeathGrip);
+
+ nsresult rv = NS_OK;
+ switch (aResult->getResultType()) {
+ case txAExprResult::STRING:
+ {
+ rv = mStringResults.push(static_cast<StringResult*>(aResult));
+ if (NS_FAILED(rv)) {
+ delete aResult;
+ }
+ return;
+ }
+ case txAExprResult::NODESET:
+ {
+ static_cast<txNodeSet*>(aResult)->clear();
+ rv = mNodeSetResults.push(static_cast<txNodeSet*>(aResult));
+ if (NS_FAILED(rv)) {
+ delete aResult;
+ }
+ return;
+ }
+ case txAExprResult::NUMBER:
+ {
+ rv = mNumberResults.push(static_cast<NumberResult*>(aResult));
+ if (NS_FAILED(rv)) {
+ delete aResult;
+ }
+ return;
+ }
+ default:
+ {
+ delete aResult;
+ }
+ }
+}
+
+nsresult
+txResultRecycler::getStringResult(StringResult** aResult)
+{
+ if (mStringResults.isEmpty()) {
+ *aResult = new StringResult(this);
+ }
+ else {
+ *aResult = static_cast<StringResult*>(mStringResults.pop());
+ (*aResult)->mValue.Truncate();
+ (*aResult)->mRecycler = this;
+ }
+ NS_ADDREF(*aResult);
+
+ return NS_OK;
+}
+
+nsresult
+txResultRecycler::getStringResult(const nsAString& aValue,
+ txAExprResult** aResult)
+{
+ if (mStringResults.isEmpty()) {
+ *aResult = new StringResult(aValue, this);
+ }
+ else {
+ StringResult* strRes =
+ static_cast<StringResult*>(mStringResults.pop());
+ strRes->mValue = aValue;
+ strRes->mRecycler = this;
+ *aResult = strRes;
+ }
+ NS_ADDREF(*aResult);
+
+ return NS_OK;
+}
+
+void
+txResultRecycler::getEmptyStringResult(txAExprResult** aResult)
+{
+ *aResult = mEmptyStringResult;
+ NS_ADDREF(*aResult);
+}
+
+nsresult
+txResultRecycler::getNodeSet(txNodeSet** aResult)
+{
+ if (mNodeSetResults.isEmpty()) {
+ *aResult = new txNodeSet(this);
+ }
+ else {
+ *aResult = static_cast<txNodeSet*>(mNodeSetResults.pop());
+ (*aResult)->mRecycler = this;
+ }
+ NS_ADDREF(*aResult);
+
+ return NS_OK;
+}
+
+nsresult
+txResultRecycler::getNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult)
+{
+ if (mNodeSetResults.isEmpty()) {
+ *aResult = new txNodeSet(*aNodeSet, this);
+ }
+ else {
+ *aResult = static_cast<txNodeSet*>(mNodeSetResults.pop());
+ (*aResult)->append(*aNodeSet);
+ (*aResult)->mRecycler = this;
+ }
+ NS_ADDREF(*aResult);
+
+ return NS_OK;
+}
+
+nsresult
+txResultRecycler::getNodeSet(const txXPathNode& aNode, txAExprResult** aResult)
+{
+ if (mNodeSetResults.isEmpty()) {
+ *aResult = new txNodeSet(aNode, this);
+ }
+ else {
+ txNodeSet* nodes = static_cast<txNodeSet*>(mNodeSetResults.pop());
+ nodes->append(aNode);
+ nodes->mRecycler = this;
+ *aResult = nodes;
+ }
+ NS_ADDREF(*aResult);
+
+ return NS_OK;
+}
+
+nsresult
+txResultRecycler::getNumberResult(double aValue, txAExprResult** aResult)
+{
+ if (mNumberResults.isEmpty()) {
+ *aResult = new NumberResult(aValue, this);
+ }
+ else {
+ NumberResult* numRes =
+ static_cast<NumberResult*>(mNumberResults.pop());
+ numRes->value = aValue;
+ numRes->mRecycler = this;
+ *aResult = numRes;
+ }
+ NS_ADDREF(*aResult);
+
+ return NS_OK;
+}
+
+void
+txResultRecycler::getBoolResult(bool aValue, txAExprResult** aResult)
+{
+ *aResult = aValue ? mTrueResult : mFalseResult;
+ NS_ADDREF(*aResult);
+}
+
+nsresult
+txResultRecycler::getNonSharedNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult)
+{
+ if (aNodeSet->mRefCnt > 1) {
+ return getNodeSet(aNodeSet, aResult);
+ }
+
+ *aResult = aNodeSet;
+ NS_ADDREF(*aResult);
+
+ return NS_OK;
+}
+
+void
+txAExprResult::Release()
+{
+ --mRefCnt;
+ NS_LOG_RELEASE(this, mRefCnt, "txAExprResult");
+ if (mRefCnt == 0) {
+ if (mRecycler) {
+ mRecycler->recycle(this);
+ }
+ else {
+ delete this;
+ }
+ }
+}