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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 #include <JavaScriptCore/Heap.h>
     31 #include <JavaScriptCore/JSGlobalData.h>
     32 #include <WebCore/GCController.h>
     33 #include <WebCore/JSDOMWindow.h>
     34 #include <runtime/JSLock.h>
     35 
     36 using namespace JSC;
     37 using namespace WebCore;
     38 
     39 // WebJavaScriptCollector ---------------------------------------------------------------------------
     40 
     41 WebJavaScriptCollector::WebJavaScriptCollector()
     42 : m_refCount(0)
     43 {
     44     gClassCount++;
     45     gClassNameCount.add("WebJavaScriptCollector");
     46 }
     47 
     48 WebJavaScriptCollector::~WebJavaScriptCollector()
     49 {
     50     gClassCount--;
     51     gClassNameCount.remove("WebJavaScriptCollector");
     52 }
     53 
     54 WebJavaScriptCollector* WebJavaScriptCollector::createInstance()
     55 {
     56     WebJavaScriptCollector* instance = new WebJavaScriptCollector();
     57     instance->AddRef();
     58     return instance;
     59 }
     60 
     61 // IUnknown -------------------------------------------------------------------
     62 
     63 HRESULT STDMETHODCALLTYPE WebJavaScriptCollector::QueryInterface(REFIID riid, void** ppvObject)
     64 {
     65     *ppvObject = 0;
     66     if (IsEqualGUID(riid, IID_IUnknown))
     67         *ppvObject = static_cast<IWebJavaScriptCollector*>(this);
     68     else if (IsEqualGUID(riid, IID_IWebJavaScriptCollector))
     69         *ppvObject = static_cast<IWebJavaScriptCollector*>(this);
     70     else
     71         return E_NOINTERFACE;
     72 
     73     AddRef();
     74     return S_OK;
     75 }
     76 
     77 ULONG STDMETHODCALLTYPE WebJavaScriptCollector::AddRef(void)
     78 {
     79     return ++m_refCount;
     80 }
     81 
     82 ULONG STDMETHODCALLTYPE WebJavaScriptCollector::Release(void)
     83 {
     84     ULONG newRef = --m_refCount;
     85     if (!newRef)
     86         delete(this);
     87 
     88     return newRef;
     89 }
     90 
     91 // IWebJavaScriptCollector ------------------------------------------------------------------------------
     92 
     93 HRESULT STDMETHODCALLTYPE WebJavaScriptCollector::collect()
     94 {
     95     gcController().garbageCollectNow();
     96     return S_OK;
     97 }
     98 
     99 HRESULT STDMETHODCALLTYPE WebJavaScriptCollector::collectOnAlternateThread(
    100     /* [in] */ BOOL waitUntilDone)
    101 {
    102     gcController().garbageCollectOnAlternateThreadForDebugging(!!waitUntilDone);
    103     return S_OK;
    104 }
    105 
    106 HRESULT STDMETHODCALLTYPE WebJavaScriptCollector::objectCount(
    107     /* [retval][out] */ UINT* count)
    108 {
    109     if (!count) {
    110         ASSERT_NOT_REACHED();
    111         return E_POINTER;
    112     }
    113 
    114     JSLock lock(SilenceAssertionsOnly);
    115     *count = (UINT)JSDOMWindow::commonJSGlobalData()->heap.objectCount();
    116     return S_OK;
    117 }
    118