← Patterns
Shared ownership
12345678910111213 | #include <memory>
#include <utility>
struct foo {};
void func(std::shared_ptr<foo> obj)
{ }
int main()
{
std::shared_ptr<foo> obj = std::make_shared<foo>();
func(obj);
} |
This pattern is licensed under the CC0 Public Domain Dedication.
Requires
c++11
or newer.
Intent
Share ownership of a dynamically allocated object with another unit of code.
Description
On line 11, we create a std::shared_ptr
which has ownership of a dynamically allocated foo object
(allocated with the std::make_shared
utility function). Line 12 then demonstrates sharing ownership of this
object with a function. That is, both main and func have access
to the same foo object. When ownership of an object is shared, it
will only be destroyed when all std::shared_ptrs owning it are
destroyed.
In other cases, you may instead wish to transfer unique ownership of an object.
