std::enable_shared_from_this::shared_from_this
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<tbody> </tbody> shared_ptr<T> shared_from_this(); |
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shared_ptr<T const> shared_from_this() const; |
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std::shared_ptr<T>, *this std::shared_ptr<T>, *this.:
Returns a
std::shared_ptr<T> that shares ownership of *this with all existing std::shared_ptr<T> that refer to *this.shared_from_this, std::shared_ptr<T> p, *this.:
Before calling
shared_from_this, there should be at least one std::shared_ptr<T> p that owns *this.std::shared_ptr<T>, *this std::shared_ptr<T>s:
std::shared_ptr<T> that shares ownership of *this with pre-existing std::shared_ptr<T>s#include <iostream>
#include <memory>
struct Foo : public std::enable_shared_from_this<Foo> {
Foo() { std::cout << "Foo::Foo\n"; }
~Foo() { std::cout << "Foo::~Foo\n"; }
std::shared_ptr<Foo> getFoo() { return shared_from_this(); }
};
int main() {
Foo *f = new Foo;
std::shared_ptr<Foo> pf1;
{
std::shared_ptr<Foo> pf2(f);
pf1 = pf2->getFoo(); // shares ownership of object with pf2
}
std::cout << "pf2 is gone\n";
}
:
Foo::Foo
pf2 is gone
Foo::~Foo
.
(C++11) |
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