Function readJemallocSetting

3rdparty/libprocess/src/memory_profiler.cpp:191–211

template<typename T>
Try<T> readJemallocSetting(const char* name)
{
#ifdef LIBPROCESS_ALLOW_JEMALLOC
  if (!detectJemalloc()) {
    return Error(JEMALLOC_NOT_DETECTED_MESSAGE);
  }

  T value;
  size_t size = sizeof(value);
  int error = ::mallctl(name, &value, &size, nullptr, 0);

  if (error) {
    return Error(strings::format(
       "Couldn't read option %s: %s", name, ::strerror(error)).get());
  }

  return value;
#else
  UNREACHABLE();
#endif
}


// Returns an error on failure or the previous value on success.