/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/*
 * Implementation of the user-space ashmem API for devices, which have our
 * ashmem-enabled kernel. See ashmem-sim.c for the "fake" tmp-based version,
 * used by the simulator.
 */

#include "IPCHandler.h"
#include "IPCLog.h"
#include "IPCResult.h"
#include <unordered_map>

namespace {
class IPCHandlerImpl : public IPCHandler {
public:
    std::unique_ptr<IPCResult> handle(uint32_t msg, IPCArguments*) override;
    void registerHandler(int msg, const std::function<std::unique_ptr<IPCResult>(IPCArguments*)>& handler) override;

private:
    typedef std::unordered_map<int, std::function<std::unique_ptr<IPCResult>(IPCArguments*)>> MapType;
    MapType m_map;
};

std::unique_ptr<IPCResult> IPCHandlerImpl::handle(uint32_t msg, IPCArguments* arguments)
{
    auto it = m_map.find(msg);
    if (it == m_map.end()) {
        IPC_LOGE("unable to find msg: %d", msg);
        return createVoidResult();
    }
    return it->second(arguments);
}

void IPCHandlerImpl::registerHandler(int msg, const std::function<std::unique_ptr<IPCResult>(IPCArguments*)>& handler)
{
    m_map.insert(MapType::value_type(msg, handler));
}
}

std::unique_ptr<IPCHandler> createIPCHandler()
{
    return std::unique_ptr<IPCHandler>(new IPCHandlerImpl);
}