BOOST里的shared ptr比stl里的auto ptr好在哪里呢？ - 未名空间MITBBS历史存档

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BOOST里的shared ptr比stl里的auto ptr好在哪里呢？

BOOST里的shared ptr比stl里的auto ptr好在哪里呢？# JobHunting - 待字闺中

N*g2012-01-19 08:01

1 楼

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unknowns (我怎么有这么多不知道的东西) 于 (Sun Jul 12 21:27:56 2009, 美东) 提到:
不怕, 我375收

我4个300的笔记本，断断续续列了1个半月才出，每台能赚几顿八肥罢了。今天staple
的笔记本，如果没拖打印机，自求多福
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mir (rebates) 于 (Sun Jul 12 21:27:58 2009, 美东) 提到:
我match班上最高价呀
现在不才375吗
staple
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gwrfxj (大灰狼) 于 (Sun Jul 12 21:37:14 2009, 美东) 提到:
墨神425收我几个吧，这样我就不用自己卖了

d*t2012-01-19 08:01

2 楼

请大侠们不吝赐教！

l*a2012-01-19 08:01

3 楼

auto_ptr v1(****);
auto_ptr v2=v1;
then v1 will not hold the pointer to the resource.
for share_ptr, you can have several objects to manage the same resource

【在 d********t 的大作中提到】

: 请大侠们不吝赐教！

q*x2012-01-19 08:01

4 楼

google

【在 d********t 的大作中提到】

: 请大侠们不吝赐教！

d*t2012-01-19 08:01

5 楼

Thanks!

【在 l*****a 的大作中提到】

: auto_ptr v1(****);
: auto_ptr v2=v1;
: then v1 will not hold the pointer to the resource.
: for share_ptr, you can have several objects to manage the same resource

r*t2012-01-19 08:01

6 楼

different approaches towards resource bookkeeping, resulting in different copy behaviors.

n*e2012-01-19 08:01

7 楼

boost shared_ptr is a reference counted smart pointer. It can be used in
standard containers, for example, std::vector >.
std::auto_ptr is not a reference counted smart pointer. It does NOT have
ownership, i.e, when a std::auto_ptr is assigned to another one, its
ownership is transferred. As a result, it can NOT be used in standard
containers.

d*t2012-01-19 08:01

8 楼

唉，STL自己的smart pointer都不能用在自己的container里，太悲催了。

【在 n**e 的大作中提到】

: boost shared_ptr is a reference counted smart pointer. It can be used in
: standard containers, for example, std::vector >.
: std::auto_ptr is not a reference counted smart pointer. It does NOT have
: ownership, i.e, when a std::auto_ptr is assigned to another one, its
: ownership is transferred. As a result, it can NOT be used in standard
: containers.