/
CefTaskWrapper.h
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/
CefTaskWrapper.h
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// Copyright © 2010-2015 The CefSharp Project. All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#pragma once
#include "Stdafx.h"
#include <include/base/cef_logging.h>
using namespace System;
using namespace System::Threading::Tasks;
using namespace System::Runtime::InteropServices;
using namespace CefSharp;
namespace CefSharp
{
namespace Internals
{
private class CefTaskWrapper
{
private:
// Throw the exception, this method executes on the thread pool
// in order to report a .net exception from a CEF thread.
static void ReportUnhandledException(Object ^state)
{
Exception ^e = dynamic_cast<Exception^>(state);
throw gcnew InvalidOperationException(gcnew String(L"CefTaskWrapper caught an unexpected exception. This should never happen, please contact CefSharp for assistance."), e);
}
public:
gcroot<Task^> _task;
gcroot<ITaskScheduler^> _scheduler;
CefTaskWrapper(Task^ task, ITaskScheduler^ scheduler) :
_task(task),
_scheduler(scheduler)
{
};
~CefTaskWrapper()
{
delete _task;
}
void Execute()
{
try
{
_scheduler->ExecuteTask(_task);
}
catch (Exception^ e)
{
// This should never ever happen.
// If this occurs then someone has broken a .Net ThreadScheduler/Task invariant
// i.e. trying to run a task on the wrong scheduler, or some
// weird exception during task completion.
auto msg = String::Format(gcnew String(L"CefTaskWrapper caught an unexpected exception. This should never happen, please contact CefSharp for assistance: {0}"), e->ToString());
LOG(ERROR) << StringUtils::ToNative(msg).ToString();
// Throw the exception from a threadpool thread in hopes that
// AppDomain::UnhandledException event handler will get called
// with the exception.
ThreadPool::UnsafeQueueUserWorkItem(
gcnew WaitCallback(&CefTaskWrapper::ReportUnhandledException),
static_cast<Object^>(e));
}
};
IMPLEMENT_REFCOUNTING(CefTaskWrapper)
};
}
}