/*
 * Copyright 2015 Facebook, Inc.
 *
 * Licensed 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.
 */

#pragma once

#include <thread>
#include <pthread.h>
#include <folly/Range.h>

namespace folly {

// This looks a bit weird, but it's necessary to avoid
// having an undefined compiler function called.
#if defined(__GLIBC__) && !defined(__APPLE__) && !defined(__ANDROID__)
#if __GLIBC_PREREQ(2, 12)
# define FOLLY_HAS_PTHREAD_SETNAME_NP
#endif
#endif

template <typename T>
inline bool setThreadName(T /* id */, StringPiece /* name */) {
  static_assert(
      std::is_same<T, pthread_t>::value ||
      std::is_same<T, std::thread::native_handle_type>::value,
      "type must be pthread_t or std::thread::native_handle_type");
  return false;
}

#ifdef FOLLY_HAS_PTHREAD_SETNAME_NP
template <>
inline bool setThreadName(pthread_t id, StringPiece name) {
  return 0 == pthread_setname_np(id, name.fbstr().substr(0, 15).c_str());
}
#endif

inline bool setThreadName(StringPiece name) {
  return setThreadName(pthread_self(), name);
}

}
