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      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 }
    120