shared_ptr::reset
Replace owned resource.
Syntax
void reset();
template<class Other>
void reset(Other *ptr;);
template<class Other, class D>
void reset(Other *ptr, D dtor);
template<class Other, class D, class A>
void reset(Other *ptr, D dtor, A alloc);
Parameters
Other
The type controlled by the argument pointer.D
The type of the deleter.ptr
The pointer to copy.dtor
The deleter to copy.A
The type of the allocator.alloc
The allocator to copy.
Remarks
The operators all decrement the reference count for the resource currently owned by *this and assign ownership of the resource named by the operand sequence to *this. If the reference count falls to zero, the resource is released. If an operator fails it leaves *this unchanged.
Example
// std_tr1__memory__shared_ptr_reset.cpp
// compile with: /EHsc
#include <memory>
#include <iostream>
struct deleter
{
void operator()(int *p)
{
delete p;
}
};
int main()
{
std::shared_ptr<int> sp(new int(5));
std::cout << "*sp == " << std::boolalpha
<< *sp << std::endl;
sp.reset();
std::cout << "(bool)sp == " << std::boolalpha
<< (bool)sp << std::endl;
sp.reset(new int(10));
std::cout << "*sp == " << std::boolalpha
<< *sp << std::endl;
sp.reset(new int(15), deleter());
std::cout << "*sp == " << std::boolalpha
<< *sp << std::endl;
return (0);
}
*sp == 5 (bool)sp == false *sp == 10 *sp == 15
Requirements
Header: <memory>
Namespace: std