一个助推智能指针能帮助我吗?

是的,智能指针可以调用自定义的“deleter”函数对象。

#include <iostream>
#include <tr1/memory>
struct Example {
    void release() { std::cout << "Example::release() called\n"; }
};
struct ExampleDeleter {
        void operator()(Example* e) { e->release(); }
};
int main()
{
        {
        std::tr1::shared_ptr<Example> p ( new Example, ExampleDeleter() );
        }
        std::cout << " see?\n";
}

(相同的助推器:参见 shared_ptr(Y * p, D d); 构造函数。

对, boost::shared_ptr 可以与自定义的deleter函数(如cubbi所示)或deleter函数一起使用:

void my_deleter(DOMLSSerializer* s) {
    s->release();
}

// ...
boost::shared_ptr<DOMLSSerializer> serializer(foo->createLSSerializer(), my_deleter);

不知道为什么人们再这样写自己的包装纸了@cubbi

正如回答 make shared ptr not use delete

shared_ptr<DOMLSSerializer> serializer( 
  ((DOMImplementationLS*)implementation)->createLSSerializer(), 
  std::mem_fun(&DOMLSSerializer::release) );

如果你只需要一点点 RAII 类,然后您可以自己编写助手类。它太小了,几乎不能拉自己的重量(更不用说在图书馆拉了):

class DOMLSSerializerOwner {
public:
  DOMLSSSerializerOwner( DOMLSSerializer *serializer ) : m_serializer( serializer ) { }
  ~DOMLSSerializerOwner() { m_serializer->release(); }

  operator DOMLSSerializer*() { return m_serializer; }

private:
  DOMLSSerializerOwner( const DOMLSSerializerOwner &other ); // disabled
  void operator=( const DOMLSSerializerOwner &rhs ); // disabled

  DOMLSSerializer *m_serializer;
};

然后您可以使代码读取:

void f()
{
  DOMLSSerializerOwner serializer = ((DOMImplementationLS*)implementation)->createLSSerializer();
  serializer->doThis();
  serializer->doThis();
  // Look Ma: no release() call; 'serializer' does it automatically when going out of scope
}