mirror of
https://github.com/danog/ton.git
synced 2024-12-04 10:28:27 +01:00
135 lines
3.3 KiB
C++
135 lines
3.3 KiB
C++
/*
|
|
This file is part of TON Blockchain Library.
|
|
|
|
TON Blockchain Library is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
TON Blockchain Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Copyright 2017-2019 Telegram Systems LLP
|
|
*/
|
|
#pragma once
|
|
|
|
#include "td/utils/StringBuilder.h"
|
|
|
|
#include <atomic>
|
|
|
|
namespace td {
|
|
|
|
class PollFlags {
|
|
public:
|
|
using Raw = int32;
|
|
bool can_read() const {
|
|
return has_flags(Read());
|
|
}
|
|
bool can_write() const {
|
|
return has_flags(Write());
|
|
}
|
|
bool can_close() const {
|
|
return has_flags(Close());
|
|
}
|
|
bool has_pending_error() const {
|
|
return has_flags(Error());
|
|
}
|
|
void remove_flags(PollFlags flags) {
|
|
remove_flags(flags.raw());
|
|
}
|
|
bool add_flags(PollFlags flags) {
|
|
auto old_flags = flags_;
|
|
add_flags(flags.raw());
|
|
return old_flags != flags_;
|
|
}
|
|
bool has_flags(PollFlags flags) const {
|
|
return has_flags(flags.raw());
|
|
}
|
|
|
|
bool empty() const {
|
|
return flags_ == 0;
|
|
}
|
|
Raw raw() const {
|
|
return flags_;
|
|
}
|
|
static PollFlags from_raw(Raw raw) {
|
|
return PollFlags(raw);
|
|
}
|
|
PollFlags() = default;
|
|
|
|
bool operator==(const PollFlags &other) const {
|
|
return flags_ == other.flags_;
|
|
}
|
|
bool operator!=(const PollFlags &other) const {
|
|
return !(*this == other);
|
|
}
|
|
PollFlags operator|(const PollFlags other) const {
|
|
return from_raw(raw() | other.raw());
|
|
}
|
|
|
|
static PollFlags Write() {
|
|
return PollFlags(Flag::Write);
|
|
}
|
|
static PollFlags Error() {
|
|
return PollFlags(Flag::Error);
|
|
}
|
|
static PollFlags Close() {
|
|
return PollFlags(Flag::Close);
|
|
}
|
|
static PollFlags Read() {
|
|
return PollFlags(Flag::Read);
|
|
}
|
|
static PollFlags ReadWrite() {
|
|
return Read() | Write();
|
|
}
|
|
|
|
private:
|
|
enum class Flag : Raw { Write = 0x001, Read = 0x002, Close = 0x004, Error = 0x008, None = 0 };
|
|
Raw flags_{static_cast<Raw>(Flag::None)};
|
|
|
|
explicit PollFlags(Raw raw) : flags_(raw) {
|
|
}
|
|
explicit PollFlags(Flag flag) : PollFlags(static_cast<Raw>(flag)) {
|
|
}
|
|
|
|
PollFlags &add_flags(Raw flags) {
|
|
flags_ |= flags;
|
|
return *this;
|
|
}
|
|
PollFlags &remove_flags(Raw flags) {
|
|
flags_ &= ~flags;
|
|
return *this;
|
|
}
|
|
bool has_flags(Raw flags) const {
|
|
return (flags_ & flags) == flags;
|
|
}
|
|
};
|
|
|
|
StringBuilder &operator<<(StringBuilder &sb, PollFlags flags);
|
|
|
|
class PollFlagsSet {
|
|
public:
|
|
// write flags from any thread
|
|
// this is the only function that should be called from other threads
|
|
bool write_flags(PollFlags flags);
|
|
|
|
bool write_flags_local(PollFlags flags);
|
|
bool flush() const;
|
|
|
|
PollFlags read_flags() const;
|
|
PollFlags read_flags_local() const;
|
|
void clear_flags(PollFlags flags);
|
|
void clear();
|
|
|
|
private:
|
|
mutable std::atomic<PollFlags::Raw> to_write_{0};
|
|
mutable PollFlags flags_;
|
|
};
|
|
|
|
} // namespace td
|