下述C++代码演示了确保智能指针安全释放对象数组的方法。 //Project - SharedPtrArray#include<iostream>#include<memory>usingnamespacestd;template<typenameT>voiddelete_array(T*p){cout<<"delete_array"<<endl;delete[]p;}classFish{public:~Fish(){cout<<"Fish::Fish~()"<<endl;}};intmain(){shared_ptr...
typename= typename std::enable_if<std::is_convertible<U*, T*>::value>::type>sk_sp(sk_sp<U>&&that) : fPtr(that.release()) {}/** * Adopt the bare pointer into the newly created sk_sp. * No call to ref() or unref() will be made.*/explicitsk_sp(T*obj) : fPtr(obj) {...
2.Class weak_ptr weak_ptr允许你“共享但不拥有”对象,这个class会建立起一个shared_pointer。一旦最末一个拥有该对象的shared pointer失去了拥有权,任何weak pointer 都会自动成空。因此除了default和copy构造函数之外,weak_ptr只提供“接受一个shared_ptr”的构造函数。 你不能使用*和->访问weak_ptr所指的对象。...
2.对于类型不敏感的数据【也就是内存了】，可以考虑使用std::array或者std::vector等。因为这个时候，...
一般来说 std::make_shared 是最推荐的一种写法。 增加计数 被引用则会增加计数 std::shared_ptr<int>ptr2(sp2);//再次被引用则计数+1 1. 在函数内改变计数,超过生命周期后计数会恢复,test函数内的p1析构了。 voidtest(int*ptr) ...
* - Usually you should "operator new" when passing a C++ pointer to a new shared pointer * - Use TSharedRef or TSharedPtr when passing smart pointers as function parameters, not TWeakPtr * - The "thread-safe" versions of smart pointers are a bit slower -- only use them when needed ...
(建议用std::array、std::vector取代)std::shared_ptr<int> pArray1(newint[10], [](int* p) {delete[] p; });//使用delete[]std::shared_ptr<int> pArray2(newint[10], std::default_delete<int[]>());//使用default_delete<int[]>()//5.3 常见操作cout << pw1.use_count() << endl...
C++ Library - <array> C++ Library - <bitset> C++ Library - <deque> C++ Library - <forward_list> C++ Library - <list> C++ Library - C++ Library - <multimap> C++ Library - <queue> C++ Library - <priority_queue> C++ Library - <set> C++ Library - <stack> C++ Library - <unordered...
bits/shared_ptr.h:1007:14: required from 'std::shared_ptr<typename std::enable_if<(! std::is_array<_Tp>::value), _Tp>::type> std::make_shared(_Args&& ...) [with _Tp = Widget; _Args = {WidgetOptions&}; typename enable_if<(! is_array<_Tp>::value), _Tp>::type = Widge...
shared_ptr.h:1009:14: required from 'std::shared_ptr<std::_NonArray<_Tp> > std::make_shared(_Args&& ...) [with _Tp = Widget; _Args = {WidgetContainer*}; _NonArray<_Tp> = Widget]' :15:35: required from here stl_construct...