shard_id.hh

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/*
 * This file is open source software, licensed to you under the terms
 * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership.  You may not use this file except in compliance with the License.
 *
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/*
 * Copyright 2023-present ScyllaDB
 */
 
#pragma once
 
 
namespace seastar {
 
SEASTAR_MODULE_EXPORT_BEGIN
 
using shard_id = unsigned;
 
SEASTAR_MODULE_EXPORT_END
 
namespace internal {
 
#ifdef SEASTAR_BUILD_SHARED_LIBS
shard_id* this_shard_id_ptr() noexcept;
#else
inline shard_id* this_shard_id_ptr() noexcept {
    static thread_local shard_id g_this_shard_id;
    return &g_this_shard_id;
}
#endif
 
} // namespace internal
 
SEASTAR_MODULE_EXPORT_BEGIN
 
inline shard_id this_shard_id() noexcept {
    return *internal::this_shard_id_ptr();
}
 
SEASTAR_MODULE_EXPORT_END
 
 
} // namespace seastar