1 /*

     2  * Copyright (C) 2007 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  *

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

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

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

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

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

    13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

    14  *     its contributors may be used to endorse or promote products derived

    15  *     from this software without specific prior written permission. 

    16  *

    17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

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

    19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

    20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

    21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

    24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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

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

    27  */

    28 

    29 #include "config.h"

    30 #include "GCController.h"

    31 

    32 #include <JavaScriptCore/JSObjectRef.h>

    33 #include <JavaScriptCore/JSRetainPtr.h>

    34 

    35 GCController::GCController()

    36 {

    37 }

    38 

    39 GCController::~GCController()

    40 {

    41 }

    42 

    43 // Static Functions

    44 

    45 static JSValueRef collectCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)

    46 {

    47     GCController* controller = static_cast<GCController*>(JSObjectGetPrivate(thisObject));

    48     controller->collect();

    49     return JSValueMakeUndefined(context);

    50 }

    51 

    52 static JSValueRef collectOnAlternateThreadCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)

    53 {

    54     bool waitUntilDone = false;

    55     if (argumentCount > 0)

    56         waitUntilDone = JSValueToBoolean(context, arguments[0]);

    57 

    58     GCController* controller = static_cast<GCController*>(JSObjectGetPrivate(thisObject));

    59     controller->collectOnAlternateThread(waitUntilDone);

    60 

    61     return JSValueMakeUndefined(context);

    62 }

    63 

    64 static JSValueRef getJSObjectCountCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)

    65 {

    66     GCController* controller = static_cast<GCController*>(JSObjectGetPrivate(thisObject));

    67     size_t jsObjectCount = controller->getJSObjectCount();

    68 

    69     return JSValueMakeNumber(context, jsObjectCount);

    70 }

    71 

    72 // Object Creation

    73 

    74 void GCController::makeWindowObject(JSContextRef context, JSObjectRef windowObject, JSValueRef* exception)

    75 {

    76     JSRetainPtr<JSStringRef> gcControllerStr(Adopt, JSStringCreateWithUTF8CString("GCController"));

    77 

    78     JSClassRef classRef = getJSClass();

    79     JSValueRef gcControllerObject = JSObjectMake(context, classRef, this);

    80     JSClassRelease(classRef);

    81 

    82     JSObjectSetProperty(context, windowObject, gcControllerStr.get(), gcControllerObject, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete, exception);

    83 }

    84 

    85 JSClassRef GCController::getJSClass()

    86 {

    87     static JSStaticFunction staticFunctions[] = {

    88         { "collect", collectCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

    89         { "collectOnAlternateThread", collectOnAlternateThreadCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

    90         { "getJSObjectCount", getJSObjectCountCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },

    91         { 0, 0, 0 }

    92     };

    93 

    94     static JSClassDefinition classDefinition = {

    95         0, kJSClassAttributeNone, "GCController", 0, 0, staticFunctions,

    96         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

    97     };

    98 

    99     return JSClassCreate(&classDefinition);

   100 }