c++ - Using boost::shared_ptr with WSACleanup

Question

I would like to use a boost::shared_ptr in order for WSACleanup() to be called when my function goes out of scope, like this:

void DoSomething() {
    WSAStartup(...);
    boost::shared_ptr<void> WSACleaner(static_cast<void*>(0), WSACleanup);
}

This does not compile,

Error 1 error C2197: 'int (__stdcall *)(void)' : too many arguments for call C:\projects\svn-5.3\ESA\Common\include\boost\detail\shared_count.hpp 116

any thoughts?

Answer 1

您可以使用它创建一个A析构函数调用WSACleanup和 shared_ptr 实例的类：

class A
{
    public:
        ~A() { WSACleanup(...); }
}

....

void DoSomething() {
    WSAStartup(...);
    boost::shared_ptr<A> x(new A);
}

Answer 2

来自文档：“表达式 d(p) 必须格式正确”（即WSACleanup(static_cast<void*>(0)必须格式正确。）

一种可能的解决方案：

boost::shared_ptr<void> WSACleaner(static_cast<void*>(0),
                                   [](void* dummy){WSACleanup();});