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/*
* Copyright (C) 2010 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. ``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
* 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_CORE_HTML_PARSER_HTML_PARSER_SCHEDULER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_PARSER_HTML_PARSER_SCHEDULER_H_
#include "base/macros.h"
#include "base/memory/scoped_refptr.h"
#include "base/single_thread_task_runner.h"
#include "base/timer/elapsed_timer.h"
#include "third_party/blink/renderer/core/html/parser/nesting_level_incrementer.h"
#include "third_party/blink/renderer/platform/scheduler/public/post_cancellable_task.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
namespace blink {
class HTMLDocumentParser;
class SpeculationsPumpSession : public NestingLevelIncrementer {
STACK_ALLOCATED();
public:
explicit SpeculationsPumpSession(unsigned& nesting_level);
~SpeculationsPumpSession();
base::TimeDelta ElapsedTime() const { return start_time_.Elapsed(); }
void AddedElementTokens(size_t count);
size_t ProcessedElementTokens() const { return processed_element_tokens_; }
private:
base::ElapsedTimer start_time_;
size_t processed_element_tokens_;
};
class HTMLParserScheduler final : public GarbageCollected<HTMLParserScheduler> {
public:
HTMLParserScheduler(HTMLDocumentParser*,
scoped_refptr<base::SingleThreadTaskRunner>);
~HTMLParserScheduler();
bool IsScheduledForUnpause() const;
void ScheduleForUnpause();
bool YieldIfNeeded(const SpeculationsPumpSession&, bool starting_script);
void Detach(); // Clear active tasks if any.
void Trace(Visitor*) const;
private:
bool ShouldYield(const SpeculationsPumpSession&, bool starting_script) const;
void ContinueParsing();
Member<HTMLDocumentParser> parser_;
scoped_refptr<base::SingleThreadTaskRunner> loading_task_runner_;
TaskHandle cancellable_continue_parse_task_handle_;
DISALLOW_COPY_AND_ASSIGN(HTMLParserScheduler);
};
} // namespace blink
#endif
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