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The tonic layer is analogous to "gin" for v8. It provides wrappers and helpers around common dart types and implements the basic infrastructure for allowing dart wrappers around sky DOM objects to have proper GC behavior. R=abarth@chromium.org TBR=eseidel BUG= Review URL: https://codereview.chromium.org/924593002
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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