CachedItem< T, TOwner, creator > 模板类 参考

Wrapper for data that needs to be cached. 更多...

Public 成员函数
T &	get (const TOwner *owner) const
	Returns a reference to the cached data. 更多...

Private 属性
std::once_flag	m_cache_flag
T	m_item

详细描述

template<typename T, typename TOwner, T(TOwner::*)() const creator>
class CachedItem< T, TOwner, creator >

Wrapper for data that needs to be cached.

The cached data can be accessed via the get() method from multiple threads. The first thread that calls get() will trigger creation of the data item via the creator method, blocking other threads until the item is available in the cache.

模板参数

T	the type of the data item in the cache.
TOwner	the class containing the cached item.
creator	the method of TOwner to call in order to create the data item to be cached.

在文件 context.cpp 第 91 行定义.

成员函数说明

get()

template<typename T , typename TOwner , T(TOwner::*)() const creator>

T& CachedItem< T, TOwner, creator >::get ( const TOwner *  owner ) const

inline

Returns a reference to the cached data.

Conceptually this is a const method, i.e. it will always return the same data The first time it is called, the owner will be asked to create the data.

在文件 context.cpp 第 98 行定义.

    {
      // create a lamda function to create the cached data
      auto creatorFunc = [this,owner]() { m_item = (owner->*creator)(); };
      // use std::call_once to let one thread invoke the creator func
      std::call_once(m_cache_flag, creatorFunc);
      // return the cached results
      return m_item;
    }

类成员变量说明

m_cache_flag

template<typename T , typename TOwner , T(TOwner::*)() const creator>

std::once_flag CachedItem< T, TOwner, creator >::m_cache_flag

mutableprivate

在文件 context.cpp 第 108 行定义.

被这些函数引用 CachedItem< TemplateListIntfPtr, DefinitionContext, &DC::createPartOfGroups >::get().

m_item

template<typename T , typename TOwner , T(TOwner::*)() const creator>

T CachedItem< T, TOwner, creator >::m_item

mutableprivate

在文件 context.cpp 第 109 行定义.

被这些函数引用 CachedItem< TemplateListIntfPtr, DefinitionContext, &DC::createPartOfGroups >::get().

---

该类的文档由以下文件生成:

• src/context.cpp