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49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef SKY_ENGINE_TONIC_DART_STRING_CACHE_H_
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#define SKY_ENGINE_TONIC_DART_STRING_CACHE_H_
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#include "base/logging.h"
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#include "dart/runtime/include/dart_api.h"
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#include "sky/engine/wtf/HashMap.h"
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#include "sky/engine/wtf/RefPtr.h"
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#include "sky/engine/wtf/text/StringHash.h"
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#include "sky/engine/wtf/text/StringImpl.h"
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namespace blink {
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// DartStringCache maintains a mapping between WTF Strings and Dart strings.
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// When you create a Dart string from a WTF String, the underlying character
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// data is shared between the two systems.
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class DartStringCache {
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public:
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DartStringCache();
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~DartStringCache();
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Dart_WeakPersistentHandle Get(StringImpl* string_impl,
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bool auto_scope = true) {
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DCHECK(string_impl);
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if (last_string_impl_.get() == string_impl)
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return last_dart_string_;
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return GetSlow(string_impl, auto_scope);
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}
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private:
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Dart_WeakPersistentHandle GetSlow(StringImpl* string_impl, bool auto_scope);
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static void FinalizeCacheEntry(void*, Dart_WeakPersistentHandle, void* peer);
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typedef HashMap<StringImpl*, Dart_WeakPersistentHandle> StringCache;
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StringCache cache_;
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Dart_WeakPersistentHandle last_dart_string_;
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RefPtr<StringImpl> last_string_impl_;
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DISALLOW_COPY_AND_ASSIGN(DartStringCache);
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};
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} // namespace blink
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#endif // SKY_ENGINE_TONIC_DART_STRING_CACHE_H_
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