mirror of
https://github.com/scylladb/scylladb.git
synced 2026-05-29 19:21:01 +00:00
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
/*
|
|
* Copyright (C) 2019 ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* This file is part of Scylla.
|
|
*
|
|
* Scylla is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Scylla 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <seastar/core/semaphore.hh>
|
|
#include <seastar/core/shared_ptr.hh>
|
|
|
|
class service_permit {
|
|
seastar::lw_shared_ptr<seastar::semaphore_units<>> _permit;
|
|
service_permit(seastar::semaphore_units<>&& u) : _permit(seastar::make_lw_shared<seastar::semaphore_units<>>(std::move(u))) {}
|
|
friend service_permit make_service_permit(seastar::semaphore_units<>&& permit);
|
|
friend service_permit empty_service_permit();
|
|
public:
|
|
size_t count() const { return _permit ? _permit->count() : 0; };
|
|
};
|
|
|
|
inline service_permit make_service_permit(seastar::semaphore_units<>&& permit) {
|
|
return service_permit(std::move(permit));
|
|
}
|
|
|
|
inline service_permit empty_service_permit() {
|
|
return make_service_permit(seastar::semaphore_units<>());
|
|
}
|