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/*
* Copyright (C) 2009 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 "WebKit.h"
#include "Logging.h"
#include "Page.h"
#include "RuntimeEnabledFeatures.h"
#include "Settings.h"
#include "TextEncoding.h"
#include "V8Binding.h"
#include "V8RecursionScope.h"
#include "WebKitMutationObserver.h"
#include "WebMediaPlayerClientImpl.h"
#include "WebSocket.h"
#include "WorkerContextExecutionProxy.h"
#include "platform/WebKitPlatformSupport.h"
#include "platform/WebThread.h"
#include "v8.h"
#include <public/Platform.h>
#include <wtf/Assertions.h>
#include <wtf/MainThread.h>
#include <wtf/Threading.h>
#include <wtf/text/AtomicString.h>
#if OS(DARWIN)
#include "WebSystemInterface.h"
#endif
namespace WebKit {
#if ENABLE(MUTATION_OBSERVERS)
namespace {
class EndOfTaskRunner : public WebThread::TaskObserver {
public:
virtual void didProcessTask()
{
WebCore::WebKitMutationObserver::deliverAllMutations();
}
};
} // namespace
static WebThread::TaskObserver* s_endOfTaskRunner = 0;
#endif // ENABLE(MUTATION_OBSERVERS)
// Make sure we are not re-initialized in the same address space.
// Doing so may cause hard to reproduce crashes.
static bool s_webKitInitialized = false;
static WebKitPlatformSupport* s_webKitPlatformSupport = 0;
static bool s_layoutTestMode = false;
static bool generateEntropy(unsigned char* buffer, size_t length)
{
if (s_webKitPlatformSupport) {
s_webKitPlatformSupport->cryptographicallyRandomValues(buffer, length);
return true;
}
return false;
}
#ifndef NDEBUG
static void assertV8RecursionScope()
{
ASSERT(!isMainThread() || WebCore::V8RecursionScope::properlyUsed());
}
#endif
void initialize(WebKitPlatformSupport* webKitPlatformSupport)
{
initializeWithoutV8(webKitPlatformSupport);
v8::V8::SetEntropySource(&generateEntropy);
v8::V8::Initialize();
WebCore::V8BindingPerIsolateData::ensureInitialized(v8::Isolate::GetCurrent());
#if ENABLE(MUTATION_OBSERVERS)
// currentThread will always be non-null in production, but can be null in Chromium unit tests.
if (WebThread* currentThread = webKitPlatformSupport->currentThread()) {
#ifndef NDEBUG
v8::V8::AddCallCompletedCallback(&assertV8RecursionScope);
#endif
ASSERT(!s_endOfTaskRunner);
s_endOfTaskRunner = new EndOfTaskRunner;
currentThread->addTaskObserver(s_endOfTaskRunner);
}
#endif
}
void initializeWithoutV8(WebKitPlatformSupport* webKitPlatformSupport)
{
ASSERT(!s_webKitInitialized);
s_webKitInitialized = true;
#if OS(DARWIN)
InitWebCoreSystemInterface();
#endif
ASSERT(webKitPlatformSupport);
ASSERT(!s_webKitPlatformSupport);
s_webKitPlatformSupport = webKitPlatformSupport;
Platform::initialize(s_webKitPlatformSupport);
WTF::initializeThreading();
WTF::initializeMainThread();
WTF::AtomicString::init();
// There are some code paths (for example, running WebKit in the browser
// process and calling into LocalStorage before anything else) where the
// UTF8 string encoding tables are used on a background thread before
// they're set up. This is a problem because their set up routines assert
// they're running on the main WebKitThread. It might be possible to make
// the initialization thread-safe, but given that so many code paths use
// this, initializing this lazily probably doesn't buy us much.
WebCore::UTF8Encoding();
}
void shutdown()
{
// WebKit might have been initialized without V8, so be careful not to invoke
// V8 specific functions, if V8 was not properly initialized.
#if ENABLE(MUTATION_OBSERVERS)
if (s_endOfTaskRunner) {
#ifndef NDEBUG
v8::V8::RemoveCallCompletedCallback(&assertV8RecursionScope);
#endif
ASSERT(s_webKitPlatformSupport->currentThread());
s_webKitPlatformSupport->currentThread()->removeTaskObserver(s_endOfTaskRunner);
delete s_endOfTaskRunner;
s_endOfTaskRunner = 0;
}
#endif
s_webKitPlatformSupport = 0;
Platform::shutdown();
}
WebKitPlatformSupport* webKitPlatformSupport()
{
return s_webKitPlatformSupport;
}
void setLayoutTestMode(bool value)
{
s_layoutTestMode = value;
}
bool layoutTestMode()
{
return s_layoutTestMode;
}
void enableLogChannel(const char* name)
{
WTFLogChannel* channel = WebCore::getChannelFromName(name);
if (channel)
channel->state = WTFLogChannelOn;
}
void resetPluginCache(bool reloadPages)
{
WebCore::Page::refreshPlugins(reloadPages);
}
} // namespace WebKit
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