mirror of
https://github.com/ton-blockchain/ton
synced 2025-02-12 11:12:16 +00:00
102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#pragma once
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#include "td/utils/int_types.h"
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#include "td/utils/logging.h"
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namespace ton {
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namespace adnl {
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class AdnlReceivedMask {
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public:
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void reset() {
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seqno_ = 0;
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mask_ = 0;
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}
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bool packet_is_delivered(td::int64 seqno) const {
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if (seqno <= 0) {
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return false;
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}
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if (seqno + 64 <= seqno_) {
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return true;
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}
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if (seqno > seqno_) {
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return false;
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}
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return mask_ & (1ull << (seqno_ - seqno));
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}
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void deliver_packet(td::int64 seqno) {
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CHECK(!packet_is_delivered(seqno));
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CHECK(seqno > 0);
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if (seqno <= seqno_) {
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mask_ |= (1ull << (seqno_ - seqno));
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} else {
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auto old = seqno_;
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seqno_ = seqno;
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if (seqno_ - old >= 64) {
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mask_ = 1;
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} else {
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mask_ = mask_ << (seqno_ - old);
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mask_ |= 1;
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}
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}
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}
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private:
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td::int64 seqno_{0};
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td::uint64 mask_{0};
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};
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class AdnlReceivedMaskVersion {
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public:
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bool packet_is_delivered(td::int32 utime, td::uint64 seqno) {
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if (utime < utime_) {
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return true;
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} else if (utime == utime_) {
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return mask_.packet_is_delivered(seqno);
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} else {
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return false;
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}
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}
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void deliver_packet(td::int32 utime, td::uint64 seqno) {
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CHECK(utime >= utime_);
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if (utime == utime_) {
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mask_.deliver_packet(seqno);
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} else {
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utime_ = utime;
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mask_.reset();
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mask_.deliver_packet(seqno);
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}
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}
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void reset() {
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mask_.reset();
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utime_ = 0;
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}
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private:
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AdnlReceivedMask mask_;
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td::int32 utime_{0};
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};
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} // namespace adnl
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} // namespace ton
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