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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* Licensed 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.
*/
#ifndef __VOM_DUMP_CMD_H__
#define __VOM_DUMP_CMD_H__
#include <future>
#include "vom/cmd.hpp"
#include "vom/hw.hpp"
#include <vapi/vapi.hpp>
namespace VOM {
/**
* A function type def for calculating a message's size
*/
typedef unsigned int (*get_msg_size_t)(void*);
/**
* A base class for VPP dump commands.
* Dump commands are one of the sub-set of command types to VPP. Here the
* client
* makes a read request on the resource and VPP responds with all the
* records.
* This command is executed synchronously. Once complete the client can
* 'pop'
* the records from the command object
*/
template <typename MSG>
class dump_cmd : public cmd
{
public:
typedef MSG msg_t;
typedef typename MSG::resp_type record_t;
typedef typename vapi::Result_set<typename MSG::resp_type>::const_iterator
const_iterator;
/**
* Default Constructor
*/
dump_cmd()
: cmd()
{
}
/**
* Destructor
*/
virtual ~dump_cmd() {}
/**
* Constant iterator to the start of the records retunred during the dump
*/
const_iterator begin()
{
/*
* m_dump is NULL during client UT when the commands are not issued.
*/
if (!m_dump)
return const_iterator();
return (m_dump->get_result_set().begin());
}
/**
* Constant iterator to the end of the records retunred during the dump
*/
const_iterator end()
{
if (!m_dump)
return const_iterator();
return (m_dump->get_result_set().end());
}
/**
* Wait for the issue of the command to complete
*/
rc_t wait()
{
std::future_status status;
std::future<rc_t> result;
result = m_promise.get_future();
status = result.wait_for(std::chrono::seconds(5));
if (status != std::future_status::ready) {
return (rc_t::TIMEOUT);
}
return (result.get());
}
/**
* Call operator called when the dump is complete
*/
vapi_error_e operator()(MSG& d)
{
m_promise.set_value(rc_t::OK);
return (VAPI_OK);
}
/**
* Retire/cancel a long running command
*/
virtual void retire(connection& con) {}
protected:
/**
* The underlying promise that implements the synchornous nature
* of the command issue
*/
std::promise<rc_t> m_promise;
/**
* Dump commands should not be issued whilst the HW is disabled
*/
void succeeded() {}
/**
* The HW::cmd_q is a friend so it can call suceedded.
*/
friend class HW::cmd_q;
/**
* The VAPI event registration
*/
std::unique_ptr<MSG> m_dump;
};
};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "mozilla")
* End:
*/
#endif
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