diff options
author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
---|---|---|
committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/WebCore/html/parser/HTMLParserScheduler.h | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/WebCore/html/parser/HTMLParserScheduler.h')
-rw-r--r-- | Source/WebCore/html/parser/HTMLParserScheduler.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/Source/WebCore/html/parser/HTMLParserScheduler.h b/Source/WebCore/html/parser/HTMLParserScheduler.h new file mode 100644 index 0000000..3a20b2b --- /dev/null +++ b/Source/WebCore/html/parser/HTMLParserScheduler.h @@ -0,0 +1,94 @@ +/* + * 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 HTMLParserScheduler_h +#define HTMLParserScheduler_h + +#include "Timer.h" +#include <wtf/CurrentTime.h> +#include <wtf/Noncopyable.h> +#include <wtf/PassOwnPtr.h> + +namespace WebCore { + +class HTMLDocumentParser; + +class HTMLParserScheduler : public Noncopyable { +public: + static PassOwnPtr<HTMLParserScheduler> create(HTMLDocumentParser* parser) + { + return adoptPtr(new HTMLParserScheduler(parser)); + } + ~HTMLParserScheduler(); + + struct PumpSession { + PumpSession() + : processedTokens(0) + , startTime(currentTime()) + { + } + + int processedTokens; + double startTime; + }; + + // Inline as this is called after every token in the parser. + bool shouldContinueParsing(PumpSession& session) + { + if (session.processedTokens > m_parserChunkSize) { + session.processedTokens = 0; + double elapsedTime = currentTime() - session.startTime; + if (elapsedTime > m_parserTimeLimit) { + // Schedule the parser to continue and yield from the parser. + m_continueNextChunkTimer.startOneShot(0); + return false; + } + } + + ++session.processedTokens; + return true; + } + + bool isScheduledForResume() const { return m_isSuspendedWithActiveTimer || m_continueNextChunkTimer.isActive(); } + + void suspend(); + void resume(); + +private: + HTMLParserScheduler(HTMLDocumentParser*); + + void continueNextChunkTimerFired(Timer<HTMLParserScheduler>*); + + HTMLDocumentParser* m_parser; + + double m_parserTimeLimit; + int m_parserChunkSize; + Timer<HTMLParserScheduler> m_continueNextChunkTimer; + bool m_isSuspendedWithActiveTimer; +}; + +} + +#endif |