JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / runtime / TimeoutChecker.cpp

diff --git a/runtime/TimeoutChecker.cpp b/runtime/TimeoutChecker.cpp
deleted file mode 100644 (file)
index 2798dac..0000000
--- a/runtime/TimeoutChecker.cpp
+++ /dev/null
@@ -1,145 +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;
-#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 (exec->dynamicGlobalObject()->globalObjectMethodTable()->shouldInterruptScriptBeforeTimeout(exec->dynamicGlobalObject()))
-        return true;
-
-    if (m_timeoutInterval && m_timeExecuting > m_timeoutInterval) {
-        if (exec->dynamicGlobalObject()->globalObjectMethodTable()->shouldInterruptScript(exec->dynamicGlobalObject()))
-            return true;
-        
-        reset();
-    }
-    
-    return false;
-}
-
-} // namespace JSC