mirror of
https://github.com/bitcoin/bitcoin.git
synced 2025-02-11 11:16:09 -05:00
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
// Copyright (c) 2024-present The Bitcoin Core developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#ifndef BITCOIN_NODE_TIMEOFFSETS_H
|
|
#define BITCOIN_NODE_TIMEOFFSETS_H
|
|
|
|
#include <sync.h>
|
|
|
|
#include <chrono>
|
|
#include <cstddef>
|
|
#include <deque>
|
|
|
|
namespace node {
|
|
class Warnings;
|
|
} // namespace node
|
|
|
|
class TimeOffsets
|
|
{
|
|
public:
|
|
TimeOffsets(node::Warnings& warnings) : m_warnings{warnings} {}
|
|
|
|
private:
|
|
//! Maximum number of timeoffsets stored.
|
|
static constexpr size_t MAX_SIZE{50};
|
|
//! Minimum difference between system and network time for a warning to be raised.
|
|
static constexpr std::chrono::minutes WARN_THRESHOLD{10};
|
|
|
|
mutable Mutex m_mutex;
|
|
/** The observed time differences between our local clock and those of our outbound peers. A
|
|
* positive offset means our peer's clock is ahead of our local clock. */
|
|
std::deque<std::chrono::seconds> m_offsets GUARDED_BY(m_mutex){};
|
|
|
|
node::Warnings& m_warnings;
|
|
|
|
public:
|
|
/** Add a new time offset sample. */
|
|
void Add(std::chrono::seconds offset) EXCLUSIVE_LOCKS_REQUIRED(!m_mutex);
|
|
|
|
/** Compute and return the median of the collected time offset samples. The median is returned
|
|
* as 0 when there are less than 5 samples. */
|
|
std::chrono::seconds Median() const EXCLUSIVE_LOCKS_REQUIRED(!m_mutex);
|
|
|
|
/** Raise warnings if the median time offset exceeds the warnings threshold. Returns true if
|
|
* warnings were raised. */
|
|
bool WarnIfOutOfSync() const EXCLUSIVE_LOCKS_REQUIRED(!m_mutex);
|
|
};
|
|
|
|
#endif // BITCOIN_NODE_TIMEOFFSETS_H
|