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/*
* Copyright 2022 Google, Inc.
*
* 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 the copyright holders 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.
*/
#ifndef __MEM_SHARED_MEMORY_SERVER_HH__
#define __MEM_SHARED_MEMORY_SERVER_HH__
#include <memory>
#include <string>
#include <unordered_map>
#include "base/pollevent.hh"
#include "params/SharedMemoryServer.hh"
#include "sim/sim_object.hh"
#include "sim/system.hh"
namespace gem5
{
namespace memory
{
class SharedMemoryServer : public SimObject
{
public:
enum class RequestType : int
{
kGetPhysRange = 0,
};
explicit SharedMemoryServer(const SharedMemoryServerParams& params);
~SharedMemoryServer();
private:
class BaseShmPollEvent : public PollEvent
{
public:
BaseShmPollEvent(int fd, SharedMemoryServer* shm_server);
const std::string& name() const;
protected:
bool tryReadAll(void* buffer, size_t size);
SharedMemoryServer* shmServer;
std::string eventName;
};
class ListenSocketEvent : public BaseShmPollEvent
{
public:
using BaseShmPollEvent::BaseShmPollEvent;
void process(int revent) override;
};
class ClientSocketEvent : public BaseShmPollEvent
{
public:
using BaseShmPollEvent::BaseShmPollEvent;
void process(int revent) override;
};
std::string unixSocketPath;
System* system;
int serverFd;
std::unique_ptr<ListenSocketEvent> listenSocketEvent;
std::unordered_map<int, std::unique_ptr<ClientSocketEvent>>
clientSocketEvents;
};
} // namespace memory
} // namespace gem5
#endif // __MEM_SHARED_MEMORY_SERVER_HH__