folly::settings::detail Namespace Reference

Classes
class	SettingCore
class	SettingWrapper
class	SnapshotSettingWrapper
struct	TypeIdentity

Typedefs
template<class T >
using	TypeIdentityT = typename TypeIdentity< T >::type

Functions
	if (savedValue)
return core	getSlow ()
template<class T >
void	set (detail::SettingCore< T > &core, const T &t, StringPiece reason)
template<class T >
std::enable_if_t< std::is_constructible< T, StringPiece >::value, T >	convertOrConstruct (StringPiece newValue)
template<class T >
std::enable_if_t<!std::is_constructible< T, StringPiece >::value, T >	convertOrConstruct (StringPiece newValue)
void	registerSetting (SettingCoreBase &core)
auto &	getSavedValuesMutex ()
auto &	getSavedValues ()
SettingCoreBase::Version	nextGlobalVersion ()
void	saveValueForOutstandingSnapshots (SettingCoreBase::Key settingKey, SettingCoreBase::Version version, const BoxedValue &value)
const BoxedValue *FOLLY_NULLABLE	getSavedValue (SettingCoreBase::Key settingKey, SettingCoreBase::Version at)

Variables
template<class T >
auto	savedValue = detail::getSavedValue(core.getKey(), at_)
std::atomic< SettingCoreBase::Version >	gGlobalVersion_

Typedef Documentation

template<class T >

using folly::settings::detail::TypeIdentityT = typedef typename TypeIdentity<T>::type

Definition at line 89 of file Settings.h.

Function Documentation

template<class T >

std::enable_if_t<std::is_constructible<T, StringPiece>::value, T> folly::settings::detail::convertOrConstruct

(

StringPiece

newValue

)

Definition at line 239 of file SettingsImpl.h.

References folly::T, and value.

                                         {
  return T(newValue);
}

template<class T >

std::enable_if_t<!std::is_constructible<T, StringPiece>::value, T> folly::settings::detail::convertOrConstruct

(

StringPiece

newValue

)

Definition at line 244 of file SettingsImpl.h.

                                         {
  return to<T>(newValue);
}

const BoxedValue* FOLLY_NULLABLE folly::settings::detail::getSavedValue	(	SettingCoreBase::Key	settingKey,
		SettingCoreBase::Version	at
	)

Definition at line 142 of file Settings.cpp.

References folly::test::end(), getSavedValues(), getSavedValuesMutex(), and gGlobalVersion_.

                                                                        {
  SharedMutex::ReadHolder lg(getSavedValuesMutex());
  auto it = getSavedValues().find(at);
  if (it != getSavedValues().end()) {
    auto jt = it->second.second.find(settingKey);
    if (jt != it->second.second.end()) {
      return &jt->second;
    }
  }
  return nullptr;
}

auto& folly::settings::detail::getSavedValues

(

)

Definition at line 117 of file Settings.cpp.

Referenced by getSavedValue(), and saveValueForOutstandingSnapshots().

                       {
  static std::unordered_map<
      SettingCoreBase::Version,
      std::pair<size_t, std::unordered_map<SettingCoreBase::Key, BoxedValue>>>
      gSavedValues;
  return gSavedValues;
}

auto& folly::settings::detail::getSavedValuesMutex

(

)

Definition at line 111 of file Settings.cpp.

Referenced by getSavedValue(), and saveValueForOutstandingSnapshots().

                            {
  static SharedMutex gSavedValuesMutex;
  return gSavedValuesMutex;
}

return core folly::settings::detail::getSlow

(

)

Referenced by folly::SingletonThreadLocal< T, Tag, Make, TLTag >::get(), folly::settings::detail::SettingCore< T >::getAsString(), and folly::SingletonThreadLocal< T, Tag, Make, TLTag >::getWrapper().

folly::settings::detail::if

(

savedValue

)

Definition at line 225 of file SettingsImpl.h.

References savedValue.

                    {
      return savedValue->template unbox<T>();
    }

SettingCoreBase::Version folly::settings::detail::nextGlobalVersion

(

)

Definition at line 125 of file Settings.cpp.

Referenced by folly::settings::detail::SettingCore< T >::set().

                                           {
  return gGlobalVersion_.fetch_add(1) + 1;
}

void folly::settings::detail::registerSetting

(

SettingCoreBase &

core

)

Definition at line 33 of file Settings.cpp.

References folly::gen::move.

Referenced by folly::settings::detail::SettingCore< T >::SettingCore().

                                            {
  if (core.meta().project.empty() ||
      core.meta().project.find('_') != std::string::npos) {
    throw std::logic_error(
        "Setting project must be nonempty and cannot contain underscores: " +
        core.meta().project.str());
  }

  auto fullname = core.meta().project.str() + "_" + core.meta().name.str();

  auto mapPtr = settingsMap().wlock();
  auto it = mapPtr->find(fullname);
  if (it != mapPtr->end()) {
    throw std::logic_error("FOLLY_SETTING already exists: " + fullname);
  }
  mapPtr->emplace(std::move(fullname), &core);
}

void folly::settings::detail::saveValueForOutstandingSnapshots	(	SettingCoreBase::Key	settingKey,
		SettingCoreBase::Version	version,
		const BoxedValue &	value
	)

Definition at line 129 of file Settings.cpp.

References FOLLY_NULLABLE, getSavedValues(), getSavedValuesMutex(), and folly::value().

Referenced by folly::settings::detail::SettingCore< T >::set().

                             {
  SharedMutex::WriteHolder lg(getSavedValuesMutex());
  for (auto& it : getSavedValues()) {
    if (version <= it.first) {
      it.second.second[settingKey] = value;
    }
  }
}

template<class T >

void folly::settings::detail::set	(	detail::SettingCore< T > &	core,
		const T &	t,
		StringPiece	reason
	)

Definition at line 232 of file SettingsImpl.h.

References folly::T, and value.

                                                                       {
    snapshotValues_[core.getKey()] = detail::BoxedValue(t, reason, core);
  }

Variable Documentation

std::atomic<SettingCoreBase::Version> folly::settings::detail::gGlobalVersion_

Definition at line 109 of file Settings.cpp.

Referenced by getSavedValue().

template<class T >

auto folly::settings::detail::savedValue = detail::getSavedValue(core.getKey(), at_)

Can we store T in a global atomic?

Definition at line 224 of file SettingsImpl.h.

Referenced by if().