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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_V8_VALUE_CACHE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_V8_VALUE_CACHE_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/bindings/parkable_string.h"
#include "third_party/blink/renderer/platform/bindings/v8_global_value_map.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "v8/include/v8.h"
namespace blink {
class StringCacheMapTraits
: public V8GlobalValueMapTraits<StringImpl*,
v8::String,
v8::kWeakWithParameter> {
STATIC_ONLY(StringCacheMapTraits);
public:
// Weak traits:
typedef StringImpl WeakCallbackDataType;
typedef v8::GlobalValueMap<StringImpl*, v8::String, StringCacheMapTraits>
MapType;
static WeakCallbackDataType* WeakCallbackParameter(
MapType* map,
StringImpl* key,
v8::Local<v8::String>& value) {
return key;
}
static void DisposeCallbackData(WeakCallbackDataType* callback_data) {}
static MapType* MapFromWeakCallbackInfo(
const v8::WeakCallbackInfo<WeakCallbackDataType>&);
static StringImpl* KeyFromWeakCallbackInfo(
const v8::WeakCallbackInfo<WeakCallbackDataType>& data) {
return data.GetParameter();
}
static void OnWeakCallback(
const v8::WeakCallbackInfo<WeakCallbackDataType>&) {}
static void Dispose(v8::Isolate*,
v8::Global<v8::String> value,
StringImpl* key);
static void DisposeWeak(const v8::WeakCallbackInfo<WeakCallbackDataType>&);
};
class ParkableStringCacheMapTraits
: public V8GlobalValueMapTraits<ParkableStringImpl*,
v8::String,
v8::kWeakWithParameter> {
STATIC_ONLY(ParkableStringCacheMapTraits);
public:
// Weak traits:
typedef ParkableStringImpl WeakCallbackDataType;
typedef v8::GlobalValueMap<ParkableStringImpl*,
v8::String,
ParkableStringCacheMapTraits>
MapType;
static WeakCallbackDataType* WeakCallbackParameter(
MapType* map,
ParkableStringImpl* key,
v8::Local<v8::String>& value) {
return key;
}
static void DisposeCallbackData(WeakCallbackDataType* callback_data) {}
static MapType* MapFromWeakCallbackInfo(
const v8::WeakCallbackInfo<WeakCallbackDataType>&);
static ParkableStringImpl* KeyFromWeakCallbackInfo(
const v8::WeakCallbackInfo<WeakCallbackDataType>& data) {
return data.GetParameter();
}
static void OnWeakCallback(const v8::WeakCallbackInfo<WeakCallbackDataType>&);
static void Dispose(v8::Isolate*,
v8::Global<v8::String> value,
ParkableStringImpl* key);
static void DisposeWeak(const v8::WeakCallbackInfo<WeakCallbackDataType>&);
};
// String cache helps convert WTF strings (StringImpl*) into v8 strings by
// only creating a v8::String for a particular StringImpl* once and caching it
// for future use. It is held by and can be retrieved from V8PerIsolateData, and
// is cleared when the isolate is destroyed. Entries are removed from the
// backing global value map when weak references to the values are collected.
class PLATFORM_EXPORT StringCache {
USING_FAST_MALLOC(StringCache);
public:
explicit StringCache(v8::Isolate* isolate)
: string_cache_(isolate), parkable_string_cache_(isolate) {}
StringCache(const StringCache&) = delete;
StringCache& operator=(const StringCache&) = delete;
v8::Local<v8::String> V8ExternalString(v8::Isolate* isolate,
StringImpl* string_impl);
v8::Local<v8::String> V8ExternalString(v8::Isolate* isolate,
const ParkableString& string);
void SetReturnValueFromString(v8::ReturnValue<v8::Value> return_value,
StringImpl* string_impl);
void Dispose();
friend class StringCacheMapTraits;
friend class ParkableStringCacheMapTraits;
private:
v8::Local<v8::String> CreateStringAndInsertIntoCache(v8::Isolate*,
StringImpl*);
v8::Local<v8::String> CreateStringAndInsertIntoCache(v8::Isolate*,
ParkableString);
StringCacheMapTraits::MapType string_cache_;
ParkableStringCacheMapTraits::MapType parkable_string_cache_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_V8_VALUE_CACHE_H_
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