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/*
* Copyright (C) 2010 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 INC. AND ITS 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 APPLE INC. OR ITS 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.
*/
#ifndef GenericCallback_h
#define GenericCallback_h
#include "WKAPICast.h"
#include "WebError.h"
#include <wtf/HashMap.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
namespace WebKit {
template<typename APIReturnValueType, typename InternalReturnValueType = typename APITypeInfo<APIReturnValueType>::ImplType>
class GenericCallback : public RefCounted<GenericCallback<APIReturnValueType, InternalReturnValueType> > {
public:
typedef void (*CallbackFunction)(APIReturnValueType, WKErrorRef, void*);
static PassRefPtr<GenericCallback> create(void* context, CallbackFunction callback)
{
return adoptRef(new GenericCallback(context, callback));
}
~GenericCallback()
{
ASSERT(!m_callback);
}
void performCallbackWithReturnValue(InternalReturnValueType returnValue)
{
ASSERT(m_callback);
m_callback(toAPI(returnValue), 0, m_context);
m_callback = 0;
}
void invalidate()
{
ASSERT(m_callback);
RefPtr<WebError> error = WebError::create();
m_callback(0, toAPI(error.get()), m_context);
m_callback = 0;
}
uint64_t callbackID() const { return m_callbackID; }
private:
static uint64_t generateCallbackID()
{
static uint64_t uniqueCallbackID = 1;
return uniqueCallbackID++;
}
GenericCallback(void* context, CallbackFunction callback)
: m_context(context)
, m_callback(callback)
, m_callbackID(generateCallbackID())
{
}
void* m_context;
CallbackFunction m_callback;
uint64_t m_callbackID;
};
template<typename T>
void invalidateCallbackMap(HashMap<uint64_t, T>& map)
{
Vector<T> callbacksVector;
copyValuesToVector(map, callbacksVector);
for (size_t i = 0, size = callbacksVector.size(); i < size; ++i)
callbacksVector[i]->invalidate();
map.clear();
}
} // namespace WebKit
#endif // GenericCallback_h
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