fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
30 lines
865 B
C++
30 lines
865 B
C++
/*
|
|
* Copyright (C) 2019-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: AGPL-3.0-or-later
|
|
*/
|
|
|
|
#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<>());
|
|
}
|