/*

 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.

 *

 * 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR

 * 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 "JSBase.h"

#include "JSBasePrivate.h"

#include "APICast.h"

#include "APIShims.h"

#include "Completion.h"

#include "OpaqueJSString.h"

#include "SourceCode.h"

#include <interpreter/CallFrame.h>

#include <runtime/InitializeThreading.h>

#include <runtime/Completion.h>

#include <runtime/JSGlobalObject.h>

#include <runtime/JSLock.h>

#include <runtime/JSObject.h>

#include <wtf/text/StringHash.h>

using namespace JSC;

JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)

{

    ExecState* exec = toJS(ctx);

    APIEntryShim entryShim(exec);

    JSObject* jsThisObject = toJS(thisObject);

    // evaluate sets "this" to the global object if it is NULL

    JSGlobalObject* globalObject = exec->dynamicGlobalObject();

    SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber);

    Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), source, jsThisObject);

    if (completion.complType() == Throw) {

        if (exception)

            *exception = toRef(exec, completion.value());

        return 0;

    }

    if (completion.value())

        return toRef(exec, completion.value());

    // happens, for example, when the only statement is an empty (';') statement

    return toRef(exec, jsUndefined());

}

bool JSCheckScriptSyntax(JSContextRef ctx, JSStringRef script, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)

{

    ExecState* exec = toJS(ctx);

    APIEntryShim entryShim(exec);

    SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber);

    Completion completion = checkSyntax(exec->dynamicGlobalObject()->globalExec(), source);

    if (completion.complType() == Throw) {

        if (exception)

            *exception = toRef(exec, completion.value());

        return false;

    }

    return true;

}

void JSGarbageCollect(JSContextRef ctx)

{

    // We used to recommend passing NULL as an argument here, which caused the only heap to be collected.

    // As there is no longer a shared heap, the previously recommended usage became a no-op (but the GC

    // will happen when the context group is destroyed).

    // Because the function argument was originally ignored, some clients may pass their released context here,

    // in which case there is a risk of crashing if another thread performs GC on the same heap in between.

    if (!ctx)

        return;

    ExecState* exec = toJS(ctx);

    APIEntryShim entryShim(exec, false);

    JSGlobalData& globalData = exec->globalData();

    if (!globalData.heap.isBusy())

        globalData.heap.collectAllGarbage();

    // FIXME: Perhaps we should trigger a second mark and sweep

    // once the garbage collector is done if this is called when

    // the collector is busy.

}

void JSReportExtraMemoryCost(JSContextRef ctx, size_t size)

{

    ExecState* exec = toJS(ctx);

    APIEntryShim entryShim(exec);

    exec->globalData().heap.reportExtraMemoryCost(size);

}