mirror of
https://github.com/monero-project/monero.git
synced 2024-12-26 21:50:16 +00:00
110 lines
4.4 KiB
C++
110 lines
4.4 KiB
C++
// Copyright (c) 2020, The Monero Project
|
|
//
|
|
// 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.
|
|
//
|
|
// 3. Neither the name of the copyright holder 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 HOLDER 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.
|
|
|
|
#pragma once
|
|
|
|
#include <array>
|
|
#include <boost/thread/mutex.hpp>
|
|
#include <boost/utility/string_ref.hpp>
|
|
#include <cstdint>
|
|
#include <deque>
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
#include "cryptonote_basic/fwd.h"
|
|
#include "net/zmq.h"
|
|
#include "span.h"
|
|
|
|
namespace cryptonote { namespace listener
|
|
{
|
|
/*! \brief Sends ZMQ PUB messages on cryptonote events
|
|
|
|
Clients must ensure that all transaction(s) are notified before any blocks
|
|
they are contained in, and must ensure that each block is notified in chain
|
|
order. An external lock **must** be held by clients during the entire
|
|
txpool check and notification sequence and (a possibly second) lock is held
|
|
during the entire block check and notification sequence. Otherwise, events
|
|
could be sent in a different order than processed. */
|
|
class zmq_pub
|
|
{
|
|
/* Each socket has its own internal queue. So we can only use one socket, else
|
|
the messages being published are not guaranteed to be in the same order
|
|
pushed. */
|
|
|
|
net::zmq::socket relay_;
|
|
std::deque<std::vector<txpool_event>> txes_;
|
|
std::array<std::size_t, 2> chain_subs_;
|
|
std::array<std::size_t, 2> txpool_subs_;
|
|
boost::mutex sync_; //!< Synchronizes counts in `*_subs_` arrays.
|
|
|
|
public:
|
|
//! \return Name of ZMQ_PAIR endpoint for pub notifications
|
|
static constexpr const char* relay_endpoint() noexcept { return "inproc://pub_relay"; }
|
|
|
|
explicit zmq_pub(void* context);
|
|
|
|
zmq_pub(const zmq_pub&) = delete;
|
|
zmq_pub(zmq_pub&&) = delete;
|
|
|
|
~zmq_pub();
|
|
|
|
zmq_pub& operator=(const zmq_pub&) = delete;
|
|
zmq_pub& operator=(zmq_pub&&) = delete;
|
|
|
|
//! Process a client subscription request (from XPUB sockets). Thread-safe.
|
|
bool sub_request(const boost::string_ref message);
|
|
|
|
/*! Forward ZMQ messages sent to `relay` via `send_chain_main` or
|
|
`send_txpool_add` to `pub`. Used by `ZmqServer`. */
|
|
bool relay_to_pub(void* relay, void* pub);
|
|
|
|
/*! Send a `ZMQ_PUB` notification for a change to the main chain.
|
|
Thread-safe.
|
|
\return Number of ZMQ messages sent to relay. */
|
|
std::size_t send_chain_main(std::uint64_t height, epee::span<const cryptonote::block> blocks);
|
|
|
|
/*! Send a `ZMQ_PUB` notification for new tx(es) being added to the local
|
|
pool. Thread-safe.
|
|
\return Number of ZMQ messages sent to relay. */
|
|
std::size_t send_txpool_add(std::vector<cryptonote::txpool_event> txes);
|
|
|
|
//! Callable for `send_chain_main` with weak ownership to `zmq_pub` object.
|
|
struct chain_main
|
|
{
|
|
std::weak_ptr<zmq_pub> self_;
|
|
void operator()(std::uint64_t height, epee::span<const cryptonote::block> blocks) const;
|
|
};
|
|
|
|
//! Callable for `send_txpool_add` with weak ownership to `zmq_pub` object.
|
|
struct txpool_add
|
|
{
|
|
std::weak_ptr<zmq_pub> self_;
|
|
void operator()(std::vector<cryptonote::txpool_event> txes) const;
|
|
};
|
|
};
|
|
}}
|