TEST(SmartPointerTests, SharedPtr) {
{
std::shared_ptr<Foo> sh1;
EXPECT_EQ(sh1.use_count(), 0);
}
{
Foo* foo = new Foo();
std::shared_ptr<Foo> sh2(foo);
std::shared_ptr<Foo> sh3(sh2);
std::shared_ptr<Foo> sh4;
std::shared_ptr<Foo> sh5;
sh4 = sh2;
sh5 = std::shared_ptr<Foo>(sh2);
EXPECT_EQ(sh2.use_count(), 4);
EXPECT_EQ(sh3.use_count(), 4);
EXPECT_EQ(sh4.use_count(), 4);
EXPECT_EQ(sh5.use_count(), 4);
}
}
int main()
{
{
Foo *f =new Foo;
std::shared_ptr<Foo> sh2(f);
std::shared_ptr<Foo> sh3(f);
std::cout << sh2.use_count() << '\n';
std::cout << sh3.use_count() << '\n';
}
}
int main(void)
{
double r1, r2, r3, x;
int i;
x = 10.0*10.0*10.0;
printf("10^i\tsh1\t\tsh2\t\tsh3\t\terr(sh2)\terr(sh3)\n");
for(i = 2; i > -N; i--)
{
x /= 10.0;
r1 = sh1(x);
r2 = sh2(x);
r3 = sh3(x);
printf("10^%d\t%e\t%e\t%e\t%e\t%e\n", i, r1, r2, r3, (r1-r2)/r1, (r1-r3)/r1);
}
return 0;
}
int main()
{
{
std::cout << "constructor with no managed object\n";
jle::shared_ptr<Foo> sh1;
}
{
std::cout << "constructor with object\n";
jle::shared_ptr<Foo> sh2(new Foo);
jle::shared_ptr<Foo> sh3(sh2);
std::cout << sh2.use_count() << '\n';
std::cout << sh3.use_count() << '\n';
}
{
std::cout << "constructor with object and deleter\n";
jle::shared_ptr<Foo> sh4(new Foo, D());
}
{
std::cout << "valid pointer" << std::endl;
auto ptr = jle::make_shared<int>(22);
std::cout << "expired " << int(ptr.expired()) << std::endl;
}
{
std::cout << "invalid pointer" << std::endl;
auto ptr = jle::make_shared<int>(22);
ptr.reset();
std::cout << "expired " << int(ptr.expired()) << std::endl;
}
{
std::cout << "invalid pointer" << std::endl;
jle::shared_ptr<int> ptr;
std::cout << "expired " << int(ptr.expired()) << std::endl;
}
{
jle::shared_ptr<int> foo = jle::make_shared<int> (10);
// same as:
jle::shared_ptr<int> foo2 (new int(10));
auto bar = jle::make_shared<int> (20);
auto baz = jle::make_shared<std::pair<int,int>> (30,40);
std::cout << "*foo: " << *foo << '\n';
std::cout << "*bar: " << *bar << '\n';
std::cout << "*baz: " << baz->first << ' ' << baz->second << '\n';
}
{
std::cout << "invalid pointer" << std::endl;
auto ptr = jle::make_shared<int>(22);
ptr = {};
std::cout << "expired " << int(ptr.expired()) << std::endl;
}
}
