c++,在class内部获得this指针的shared_ptr

在class内部,获得this指针的shared_ptr,需要class继承std::enable_shared_from_this,示例代码如下:

#include

#include

class SharedTest :public std::enable_shared_from_this

{

public:

SharedTest(int v) : std::enable_shared_from_this(),

val(v)

{

std::cout << "SharedTest,val = " << val << std::endl;

}

void SelfShared()

{

auto self_ptr = shared_from_this();

std::cout << "SelfShared,val = " << val << ",use_count = " << self_ptr.use_count() << std::endl;

}

~SharedTest()

{

std::cout << "~SharedTest,val = " << val << std::endl;

}

int val = 0;

};

int main()

{

auto tt = std::make_shared(123);

tt->SelfShared();

return 0;

}

输出结果而如下:

SharedTest,val = 123

SelfShared,val = 123,use_count = 2

~SharedTest,val = 123

（编辑：李大同）

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