1c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 2c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 3c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// The LLVM Compiler Infrastructure 4c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 8c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 9c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 10c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// <memory> 11c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 12c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// shared_ptr 13c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 14c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// void reset(); 15c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 16c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <memory> 17c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <cassert> 18c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 19c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantstruct B 20c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 21c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant static int count; 22c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 23c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant B() {++count;} 24c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant B(const B&) {++count;} 25c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant virtual ~B() {--count;} 26c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant}; 27c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 28c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint B::count = 0; 29c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 30c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantstruct A 31c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant : public B 32c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 33c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant static int count; 34c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 35c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant A() {++count;} 36c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant A(const A&) {++count;} 37c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant ~A() {--count;} 38c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant}; 39c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 40c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint A::count = 0; 41c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 42c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint main() 43c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 44c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 45c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::shared_ptr<B> p(new B); 46c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant p.reset(); 47c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 48c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 49c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(p.use_count() == 0); 50c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(p.get() == 0); 51c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 52c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 53c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 54c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::shared_ptr<B> p; 55c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant p.reset(); 56c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 57c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 58c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(p.use_count() == 0); 59c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(p.get() == 0); 60c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 61c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 62c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 63