import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

netwerk/cache2/CacheIndexIterator.cpp

@@ -0,0 +1,118 @@
+/* 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 "CacheLog.h"
+#include "CacheIndexIterator.h"
+#include "CacheIndex.h"
+#include "nsString.h"
+#include "mozilla/DebugOnly.h"
+
+
+namespace mozilla {
+namespace net {
+
+CacheIndexIterator::CacheIndexIterator(CacheIndex *aIndex, bool aAddNew)
+  : mStatus(NS_OK)
+  , mIndex(aIndex)
+  , mAddNew(aAddNew)
+{
+  LOG(("CacheIndexIterator::CacheIndexIterator() [this=%p]", this));
+}
+
+CacheIndexIterator::~CacheIndexIterator()
+{
+  LOG(("CacheIndexIterator::~CacheIndexIterator() [this=%p]", this));
+
+  Close();
+}
+
+nsresult
+CacheIndexIterator::GetNextHash(SHA1Sum::Hash *aHash)
+{
+  LOG(("CacheIndexIterator::GetNextHash() [this=%p]", this));
+
+  StaticMutexAutoLock lock(CacheIndex::sLock);
+
+  if (NS_FAILED(mStatus)) {
+    return mStatus;
+  }
+
+  if (!mRecords.Length()) {
+    CloseInternal(NS_ERROR_NOT_AVAILABLE);
+    return mStatus;
+  }
+
+  memcpy(aHash, mRecords[mRecords.Length() - 1]->mHash, sizeof(SHA1Sum::Hash));
+  mRecords.RemoveElementAt(mRecords.Length() - 1);
+
+  return NS_OK;
+}
+
+nsresult
+CacheIndexIterator::Close()
+{
+  LOG(("CacheIndexIterator::Close() [this=%p]", this));
+
+  StaticMutexAutoLock lock(CacheIndex::sLock);
+
+  return CloseInternal(NS_ERROR_NOT_AVAILABLE);
+}
+
+nsresult
+CacheIndexIterator::CloseInternal(nsresult aStatus)
+{
+  LOG(("CacheIndexIterator::CloseInternal() [this=%p, status=0x%08x]", this,
+       aStatus));
+
+  // Make sure status will be a failure
+  MOZ_ASSERT(NS_FAILED(aStatus));
+  if (NS_SUCCEEDED(aStatus)) {
+    aStatus = NS_ERROR_UNEXPECTED;
+  }
+
+  if (NS_FAILED(mStatus)) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  DebugOnly<bool> removed = mIndex->mIterators.RemoveElement(this);
+  MOZ_ASSERT(removed);
+  mStatus = aStatus;
+
+  return NS_OK;
+}
+
+void
+CacheIndexIterator::AddRecord(CacheIndexRecord *aRecord)
+{
+  LOG(("CacheIndexIterator::AddRecord() [this=%p, record=%p]", this, aRecord));
+
+  mRecords.AppendElement(aRecord);
+}
+
+bool
+CacheIndexIterator::RemoveRecord(CacheIndexRecord *aRecord)
+{
+  LOG(("CacheIndexIterator::RemoveRecord() [this=%p, record=%p]", this,
+       aRecord));
+
+  return mRecords.RemoveElement(aRecord);
+}
+
+bool
+CacheIndexIterator::ReplaceRecord(CacheIndexRecord *aOldRecord,
+                                  CacheIndexRecord *aNewRecord)
+{
+  LOG(("CacheIndexIterator::ReplaceRecord() [this=%p, oldRecord=%p, "
+       "newRecord=%p]", this, aOldRecord, aNewRecord));
+
+  if (RemoveRecord(aOldRecord)) {
+    AddRecord(aNewRecord);
+    return true;
+  }
+
+  return false;
+}
+
+} // namespace net
+} // namespace mozilla