mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
83 lines
2.1 KiB
C++
83 lines
2.1 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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#include "td/utils/port/PollFlags.h"
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namespace td {
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bool PollFlagsSet::write_flags(PollFlags flags) {
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if (flags.empty()) {
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return false;
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}
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auto old_flags = to_write_.fetch_or(flags.raw(), std::memory_order_relaxed);
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return (flags.raw() & ~old_flags) != 0;
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}
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bool PollFlagsSet::write_flags_local(PollFlags flags) {
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return flags_.add_flags(flags);
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}
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bool PollFlagsSet::flush() const {
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if (to_write_.load(std::memory_order_relaxed) == 0) {
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return false;
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}
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auto to_write = to_write_.exchange(0, std::memory_order_relaxed);
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auto old_flags = flags_;
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flags_.add_flags(PollFlags::from_raw(to_write));
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if (flags_.can_close()) {
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flags_.remove_flags(PollFlags::Write());
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}
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return flags_ != old_flags;
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}
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PollFlags PollFlagsSet::read_flags() const {
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flush();
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return flags_;
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}
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PollFlags PollFlagsSet::read_flags_local() const {
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return flags_;
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}
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void PollFlagsSet::clear_flags(PollFlags flags) {
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flags_.remove_flags(flags);
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}
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void PollFlagsSet::clear() {
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to_write_ = 0;
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flags_ = {};
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}
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StringBuilder &operator<<(StringBuilder &sb, PollFlags flags) {
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sb << '[';
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if (flags.can_read()) {
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sb << 'R';
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}
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if (flags.can_write()) {
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sb << 'W';
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}
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if (flags.can_close()) {
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sb << 'C';
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}
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if (flags.has_pending_error()) {
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sb << 'E';
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}
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return sb << ']';
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}
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} // namespace td
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