1 /*

     2  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #include "config.h"

    27 #include "WebKitDLL.h"

    28 #include "WebJavaScriptCollector.h"

    29 

    30 #pragma warning(push, 0)

    31 #include <JavaScriptCore/JSGlobalData.h>

    32 #include <JavaScriptCore/collector.h>

    33 #include <WebCore/GCController.h>

    34 #include <WebCore/JSDOMWindow.h>

    35 #include <runtime/JSLock.h>

    36 #pragma warning(pop)

    37 

    38 using namespace JSC;

    39 using namespace WebCore;

    40 

    41 // WebJavaScriptCollector ---------------------------------------------------------------------------

    42 

    43 WebJavaScriptCollector::WebJavaScriptCollector()

    44 : m_refCount(0)

    45 {

    46     gClassCount++;

    47     gClassNameCount.add("WebJavaScriptCollector");

    48 }

    49 

    50 WebJavaScriptCollector::~WebJavaScriptCollector()

    51 {

    52     gClassCount--;

    53     gClassNameCount.remove("WebJavaScriptCollector");

    54 }

    55 

    56 WebJavaScriptCollector* WebJavaScriptCollector::createInstance()

    57 {

    58     WebJavaScriptCollector* instance = new WebJavaScriptCollector();

    59     instance->AddRef();

    60     return instance;

    61 }

    62 

    63 // IUnknown -------------------------------------------------------------------

    64 

    65 HRESULT STDMETHODCALLTYPE WebJavaScriptCollector::QueryInterface(REFIID riid, void** ppvObject)

    66 {

    67     *ppvObject = 0;

    68     if (IsEqualGUID(riid, IID_IUnknown))

    69         *ppvObject = static_cast<IWebJavaScriptCollector*>(this);

    70     else if (IsEqualGUID(riid, IID_IWebJavaScriptCollector))

    71         *ppvObject = static_cast<IWebJavaScriptCollector*>(this);

    72     else

    73         return E_NOINTERFACE;

    74 

    75     AddRef();

    76     return S_OK;

    77 }

    78 

    79 ULONG STDMETHODCALLTYPE WebJavaScriptCollector::AddRef(void)

    80 {

    81     return ++m_refCount;

    82 }

    83 

    84 ULONG STDMETHODCALLTYPE WebJavaScriptCollector::Release(void)

    85 {

    86     ULONG newRef = --m_refCount;

    87     if (!newRef)

    88         delete(this);

    89 

    90     return newRef;

    91 }

    92 

    93 // IWebJavaScriptCollector ------------------------------------------------------------------------------

    94 

    95 HRESULT STDMETHODCALLTYPE WebJavaScriptCollector::collect()

    96 {

    97     gcController().garbageCollectNow();

    98     return S_OK;

    99 }

   100 

   101 HRESULT STDMETHODCALLTYPE WebJavaScriptCollector::collectOnAlternateThread( 

   102     /* [in] */ BOOL waitUntilDone)

   103 {

   104     gcController().garbageCollectOnAlternateThreadForDebugging(!!waitUntilDone);

   105     return S_OK;

   106 }

   107 

   108 HRESULT STDMETHODCALLTYPE WebJavaScriptCollector::objectCount( 

   109     /* [retval][out] */ UINT* count)

   110 {

   111     if (!count) {

   112         ASSERT_NOT_REACHED();

   113         return E_POINTER;

   114     }

   115 

   116     JSLock lock(SilenceAssertionsOnly);

   117     *count = (UINT)JSDOMWindow::commonJSGlobalData()->heap.objectCount();

   118     return S_OK;

   119 }