如何能提高::系列化用的std ::从C ++ 11 shared_ptr的使用? [英] How can boost::serialization be used with std::shared_ptr from C++11?
问题描述
我知道有升压模块为的系列化 HTTP ://www.boost.org/doc/libs/1_47_0/libs/smart_ptr/shared_ptr.htm相对=nofollow> 的boost :: shared_ptr的
,但我找不到 的std :: shared_ptr的东西
。
I know that there is a Boost module for serialization of boost::shared_ptr
, but I cannot find anything for std::shared_ptr
.
另外,我不知道如何轻松实现它。我怕下面的code
Also, I don't know how to implement it easily. I'm afraid that the following code
namespace boost{namespace serialization{
template<class Archive, class T>
inline void serialize(Archive & ar, std::shared_ptr<T> &t, const unsigned int version)
{
if(Archive::is_loading::value) {T*r;ar>>r;t=r;}
else {ar<<t.get();}
}
}}//namespaces
不起作用。事实上,如果某个对象被提到多次,将它装入 AR&GT的第一次运行;&GT; R
,那只是一个指针后,将被复制。但是,我们将创造多个的shared_ptr
对象指向它,因此将它销毁一次以上。
doesn't work. Indeed, if some object was referred multiple times, it would be loaded with first run of ar>>r
, and after that just a pointer will be copied. However we would create multiple shared_ptr
objects pointing to it, and therefore would destruct it more than one time.
上任何想法?
约我使用该系统的一些技术细节:
Some technical details about the system I'm using:
- 操作系统:Ubuntu的11.10(64)
- 编译器:G ++(Ubuntu的/ Linaro的4.6.1-9ubuntu3)4.6.1
- 增压版本:1.46.1(以
安装命令和apt-get安装libboost-dev的
)
- OS: Ubuntu 11.10 (x64)
- Compiler: g++ (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
- boost version: 1.46.1 (installed with
sudo apt-get install libboost-dev
)
推荐答案
由于升压1.56,序列化库有<一个href=\"https://github.com/boostorg/serialization/blob/boost-1.56.0/include/boost/serialization/shared_ptr.hpp#L187\">built-in性病:: shared_ptr的支持。你并不需要实现自己的序列化的辅助功能,如果你可以使用库的更新版本。
As of Boost 1.56, the serialization library has built-in support for std::shared_ptr. You do not need to implement your own serialization helper functions if you can use a more recent version of the library.
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