src/iceberg/util/thread_util.cc

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); 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.
 */

#include "iceberg/util/thread_util_internal.h"

#if defined(_WIN32)
#  include <windows.h>
#elif defined(__APPLE__)
#  include <pthread.h>
#else
#  include <unistd.h>

#  include <sys/syscall.h>
#endif

namespace iceberg {

uint64_t OsThreadId() noexcept {
  static thread_local uint64_t tid = []() -> uint64_t {
#if defined(_WIN32)
    return static_cast<uint64_t>(::GetCurrentThreadId());
#elif defined(__APPLE__)
    uint64_t id = 0;
    pthread_threadid_np(nullptr, &id);
    return id;
#else
    return static_cast<uint64_t>(::syscall(SYS_gettid));
#endif
  }();
  return tid;
}

}  // namespace iceberg