mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
2a5e18ff64
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
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "sky/engine/config.h"
|
|
#include "sky/engine/tonic/dart_string_cache.h"
|
|
|
|
#include "sky/engine/tonic/dart_state.h"
|
|
#include "sky/engine/tonic/dart_string.h"
|
|
|
|
namespace blink {
|
|
|
|
DartStringCache::DartStringCache() : last_dart_string_(nullptr) {
|
|
}
|
|
|
|
DartStringCache::~DartStringCache() {
|
|
}
|
|
|
|
Dart_WeakPersistentHandle DartStringCache::GetSlow(StringImpl* string_impl,
|
|
bool auto_scope) {
|
|
if (Dart_WeakPersistentHandle string = cache_.get(string_impl)) {
|
|
last_dart_string_ = string;
|
|
last_string_impl_ = string_impl;
|
|
return string;
|
|
}
|
|
|
|
if (!auto_scope)
|
|
Dart_EnterScope();
|
|
|
|
Dart_Handle string = CreateDartString(string_impl);
|
|
DCHECK(!Dart_IsError(string));
|
|
|
|
intptr_t size_in_bytes = string_impl->sizeInBytes();
|
|
Dart_WeakPersistentHandle wrapper = Dart_NewWeakPersistentHandle(
|
|
string, string_impl, size_in_bytes, FinalizeCacheEntry);
|
|
|
|
string_impl->ref(); // Balanced in FinalizeCacheEntry.
|
|
cache_.set(string_impl, wrapper);
|
|
|
|
last_dart_string_ = wrapper;
|
|
last_string_impl_ = string_impl;
|
|
|
|
if (!auto_scope)
|
|
Dart_ExitScope();
|
|
|
|
return wrapper;
|
|
}
|
|
|
|
void DartStringCache::FinalizeCacheEntry(void* isolate_callback_data,
|
|
Dart_WeakPersistentHandle handle,
|
|
void* peer) {
|
|
DartState* state = reinterpret_cast<DartState*>(isolate_callback_data);
|
|
StringImpl* string_impl = reinterpret_cast<StringImpl*>(peer);
|
|
DartStringCache& cache = state->string_cache();
|
|
|
|
Dart_WeakPersistentHandle cached_handle = cache.cache_.take(string_impl);
|
|
ASSERT_UNUSED(cached_handle, handle == cached_handle);
|
|
|
|
if (cache.last_dart_string_ == handle) {
|
|
cache.last_dart_string_ = nullptr;
|
|
cache.last_string_impl_ = nullptr;
|
|
}
|
|
|
|
string_impl->deref();
|
|
}
|
|
|
|
} // namespace blink
|