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authorAllan Sandfeld Jensen <allan.jensen@digia.com>2013-09-13 12:51:20 +0200
committerThe Qt Project <gerrit-noreply@qt-project.org>2013-09-19 20:50:05 +0200
commitd441d6f39bb846989d95bcf5caf387b42414718d (patch)
treee367e64a75991c554930278175d403c072de6bb8 /Source/JavaScriptCore/runtime/TimeoutChecker.cpp
parent0060b2994c07842f4c59de64b5e3e430525c4b90 (diff)
downloadqtwebkit-d441d6f39bb846989d95bcf5caf387b42414718d.tar.gz
Import Qt5x2 branch of QtWebkit for Qt 5.2
Importing a new snapshot of webkit. Change-Id: I2d01ad12cdc8af8cb015387641120a9d7ea5f10c Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>
Diffstat (limited to 'Source/JavaScriptCore/runtime/TimeoutChecker.cpp')
-rw-r--r--Source/JavaScriptCore/runtime/TimeoutChecker.cpp147
1 files changed, 0 insertions, 147 deletions
diff --git a/Source/JavaScriptCore/runtime/TimeoutChecker.cpp b/Source/JavaScriptCore/runtime/TimeoutChecker.cpp
deleted file mode 100644
index 56d6d4b71..000000000
--- a/Source/JavaScriptCore/runtime/TimeoutChecker.cpp
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
- * Copyright (C) 2008 Cameron Zwarich <cwzwarich@uwaterloo.ca>
- *
- * 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.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
- */
-
-#include "config.h"
-#include "TimeoutChecker.h"
-
-#include "CallFrame.h"
-#include "JSGlobalObject.h"
-
-#if OS(DARWIN)
-#include <mach/mach.h>
-#elif OS(WINDOWS)
-#include <windows.h>
-#else
-#include <wtf/CurrentTime.h>
-#endif
-
-using namespace std;
-
-namespace JSC {
-
-// Number of ticks before the first timeout check is done.
-static const int ticksUntilFirstCheck = 1024;
-
-// Number of milliseconds between each timeout check.
-static const int intervalBetweenChecks = 1000;
-
-// Returns the time the current thread has spent executing, in milliseconds.
-static inline unsigned getCPUTime()
-{
-#if OS(DARWIN)
- mach_msg_type_number_t infoCount = THREAD_BASIC_INFO_COUNT;
- thread_basic_info_data_t info;
-
- // Get thread information
- mach_port_t threadPort = mach_thread_self();
- thread_info(threadPort, THREAD_BASIC_INFO, reinterpret_cast<thread_info_t>(&info), &infoCount);
- mach_port_deallocate(mach_task_self(), threadPort);
-
- unsigned time = info.user_time.seconds * 1000 + info.user_time.microseconds / 1000;
- time += info.system_time.seconds * 1000 + info.system_time.microseconds / 1000;
-
- return time;
-#elif OS(WINDOWS)
- union {
- FILETIME fileTime;
- unsigned long long fileTimeAsLong;
- } userTime, kernelTime;
-
- // GetThreadTimes won't accept NULL arguments so we pass these even though
- // they're not used.
- FILETIME creationTime, exitTime;
-
- GetThreadTimes(GetCurrentThread(), &creationTime, &exitTime, &kernelTime.fileTime, &userTime.fileTime);
-
- return userTime.fileTimeAsLong / 10000 + kernelTime.fileTimeAsLong / 10000;
-#elif OS(QNX)
- struct timespec time;
- if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &time))
- CRASH();
- return time.tv_sec * 1000.0 + time.tv_nsec / 1.0e6;
-#else
- // FIXME: We should return the time the current thread has spent executing.
-
- // use a relative time from first call in order to avoid an overflow
- static double firstTime = currentTime();
- return static_cast<unsigned> ((currentTime() - firstTime) * 1000);
-#endif
-}
-
-TimeoutChecker::TimeoutChecker()
- : m_timeoutInterval(0)
- , m_startCount(0)
-{
- reset();
-}
-
-void TimeoutChecker::reset()
-{
- m_ticksUntilNextCheck = ticksUntilFirstCheck;
- m_timeAtLastCheck = 0;
- m_timeExecuting = 0;
-}
-
-bool TimeoutChecker::didTimeOut(ExecState* exec)
-{
- unsigned currentTime = getCPUTime();
-
- if (!m_timeAtLastCheck) {
- // Suspicious amount of looping in a script -- start timing it
- m_timeAtLastCheck = currentTime;
- return false;
- }
-
- unsigned timeDiff = currentTime - m_timeAtLastCheck;
-
- if (timeDiff == 0)
- timeDiff = 1;
-
- m_timeExecuting += timeDiff;
- m_timeAtLastCheck = currentTime;
-
- // Adjust the tick threshold so we get the next checkTimeout call in the
- // interval specified in intervalBetweenChecks.
- m_ticksUntilNextCheck = static_cast<unsigned>((static_cast<float>(intervalBetweenChecks) / timeDiff) * m_ticksUntilNextCheck);
- // If the new threshold is 0 reset it to the default threshold. This can happen if the timeDiff is higher than the
- // preferred script check time interval.
- if (m_ticksUntilNextCheck == 0)
- m_ticksUntilNextCheck = ticksUntilFirstCheck;
-
- if (m_timeoutInterval && m_timeExecuting > m_timeoutInterval) {
- if (exec->dynamicGlobalObject()->globalObjectMethodTable()->shouldInterruptScript(exec->dynamicGlobalObject()))
- return true;
-
- reset();
- }
-
- return false;
-}
-
-} // namespace JSC