| // Copyright 2019 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 "third_party/blink/renderer/core/streams/queuing_strategy_common.h" |
| |
| #include "third_party/blink/renderer/bindings/core/v8/script_value.h" |
| #include "third_party/blink/renderer/bindings/core/v8/v8_queuing_strategy_init.h" |
| #include "third_party/blink/renderer/platform/bindings/script_state.h" |
| |
| namespace blink { |
| |
| ScriptValue GetCachedSizeFunction(ScriptState* script_state, |
| const V8PrivateProperty::SymbolKey& key, |
| SizeFunctionFactory factory) { |
| auto* isolate = script_state->GetIsolate(); |
| auto function_cache = V8PrivateProperty::GetSymbol(isolate, key); |
| v8::Local<v8::Object> global_proxy = script_state->GetContext()->Global(); |
| v8::Local<v8::Value> function; |
| if (!function_cache.GetOrUndefined(global_proxy).ToLocal(&function) || |
| function->IsUndefined()) { |
| function = factory(script_state); |
| bool is_set = function_cache.Set(global_proxy, function); |
| DCHECK(is_set || isolate->IsExecutionTerminating()); |
| } |
| return ScriptValue(isolate, function); |
| } |
| |
| } // namespace blink |
