thread.h

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef THREAD_H
#define THREAD_H
 
#include "debug.h"
#include "crashlog.h"
#include "error_func.h"
#include <system_error>
#include <thread>
#include <mutex>
 
inline void CSleep(int milliseconds)
{
  std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds));
}
 
void SetCurrentThreadName(const char *name);
 
 
template<class TFn, class... TArgs>
inline bool StartNewThread(std::thread *thr, const char *name, TFn&& _Fx, TArgs&&... _Ax)
{
  try {
    static std::mutex thread_startup_mutex;
    std::lock_guard<std::mutex> lock(thread_startup_mutex);
 
    std::thread t([] (const char *name, TFn&& F, TArgs&&... A) {
        /* Delay starting the thread till the main thread is finished
         * with the administration. This prevent race-conditions on
         * startup. */
        {
          std::lock_guard<std::mutex> lock(thread_startup_mutex);
        }
 
        SetCurrentThreadName(name);
        CrashLog::InitThread();
        try {
          /* Call user function with the given arguments. */
          F(A...);
        } catch (std::exception &e) {
          FatalError("Unhandled exception in {} thread: {}", name, e.what());
        } catch (...) {
          NOT_REACHED();
        }
      }, name, std::forward<TFn>(_Fx), std::forward<TArgs>(_Ax)...);
 
    if (thr != nullptr) {
      *thr = std::move(t);
    } else {
      t.detach();
    }
 
    return true;
  } catch (const std::system_error &e) {
    /* Something went wrong, the system we are running on might not support threads. */
    Debug(misc, 1, "Can't create thread '{}': {}", name, e.what());
  }
 
  return false;
}
 
#endif /* THREAD_H */