// Copyright (C) 2007 Davis E. King (davis@dlib.net) // License: Boost Software License See LICENSE.txt for the full license. #include <dlib/smart_pointers.h> #include <sstream> #include <string> #include <cstdlib> #include <ctime> #include "tester.h" // Don't warn about auto_ptr #if (defined(__GNUC__) && ((__GNUC__ >= 4 && __GNUC_MINOR__ >= 6) || (__GNUC__ > 4))) || \ (defined(__clang__) && ((__clang_major__ >= 3 && __clang_minor__ >= 4))) #pragma GCC diagnostic ignored "-Wdeprecated-declarations" #endif namespace { bool used_array_delete; template <typename T> struct test_deleter { void operator() (T* item) const { used_array_delete = false; delete item; } }; template <typename T> struct test_deleter<T[]> { void operator() (T* item) const { used_array_delete = true; delete [] item; } }; using namespace test; using namespace dlib; using namespace std; logger dlog("test.smart_pointers"); int counter = 0; struct base { int num; virtual ~base() {} }; struct derived : public base { derived() { ++counter; } ~derived() { --counter; } }; int deleter_called = 0; void deleter ( derived* p) { ++deleter_called; delete p; } void deleter_base ( base* p) { ++deleter_called; delete p; } typedef void (*D)(derived*); typedef void (*Db)(base*); void smart_pointers_test ( ) /*! ensures - runs tests on the smart pointers for compliance with the specs !*/ { counter = 0; deleter_called = 0; { DLIB_TEST_MSG(counter == 0,counter); scoped_ptr<base> p1(new derived); scoped_ptr<derived> p2(new derived); scoped_ptr<derived> p3; DLIB_TEST_MSG(counter == 2,counter); DLIB_TEST(!p3); p1->num = 1; p2->num = 2; DLIB_TEST(p1->num == 1); DLIB_TEST(p2->num == 2); (*p1).num = 3; (*p2).num = 4; DLIB_TEST(p1->num == 3); DLIB_TEST(p2->num == 4); DLIB_TEST_MSG(counter == 2,counter); DLIB_TEST(p1); DLIB_TEST(p2); DLIB_TEST_MSG(counter == 2,counter); p1.reset(); DLIB_TEST_MSG(counter == 1,counter); DLIB_TEST(!p1); DLIB_TEST(p2); p1.reset(new derived); DLIB_TEST_MSG(counter == 2,counter); DLIB_TEST(p1); DLIB_TEST_MSG(counter == 2,counter); p2.reset(); DLIB_TEST_MSG(counter == 1,counter); DLIB_TEST(!p2); derived* d = new derived; p2.reset(d); DLIB_TEST(p2.get() == d); DLIB_TEST_MSG(counter == 2,counter); DLIB_TEST(p2); DLIB_TEST(!p3); p2->num = 9; swap(p2,p3); DLIB_TEST(!p2); DLIB_TEST(p3); DLIB_TEST(p3->num == 9); p2.swap(p3); DLIB_TEST(p2); DLIB_TEST(!p3); DLIB_TEST(p2->num == 9); DLIB_TEST_MSG(counter == 2,counter); } DLIB_TEST_MSG(counter == 0,counter); { base* realp1 = new derived; derived* realp2 = new derived; dlib::shared_ptr<base> p1(realp1); dlib::shared_ptr<derived> p2(realp2,&deleter); dlib::shared_ptr<base> p3; dlib::shared_ptr<derived> p4; DLIB_TEST(p4.get() == 0); DLIB_TEST(p1); DLIB_TEST(p2); DLIB_TEST(!p3); DLIB_TEST(!p4); DLIB_TEST(p1.get() == realp1); DLIB_TEST(p2.get() == realp2); p1->num = 1; p2->num = 2; DLIB_TEST((*p1).num == 1); DLIB_TEST((*p2).num == 2); p1.swap(p3); DLIB_TEST(!p1); DLIB_TEST(p3); DLIB_TEST((*p3).num == 1); DLIB_TEST(p3->num == 1); swap(p1,p3); DLIB_TEST(p1); DLIB_TEST(!p3); DLIB_TEST((*p1).num == 1); DLIB_TEST(p1->num == 1); DLIB_TEST_MSG(counter == 2,counter); DLIB_TEST(p1.unique()); DLIB_TEST(p2.unique()); DLIB_TEST(!p3.unique()); DLIB_TEST(!p4.unique()); DLIB_TEST(p1.use_count() == 1); DLIB_TEST(p2.use_count() == 1); DLIB_TEST(p3.use_count() == 0); DLIB_TEST(p4.use_count() == 0); dlib::shared_ptr<base> p11(p1); DLIB_TEST(!p1.unique()); DLIB_TEST(p2.unique()); DLIB_TEST(!p3.unique()); DLIB_TEST(!p4.unique()); DLIB_TEST(p1.use_count() == 2); DLIB_TEST(p2.use_count() == 1); DLIB_TEST(p3.use_count() == 0); DLIB_TEST(p4.use_count() == 0); dlib::shared_ptr<base> p22(p2); DLIB_TEST(!p1.unique()); DLIB_TEST(!p2.unique()); DLIB_TEST(!p3.unique()); DLIB_TEST(!p4.unique()); DLIB_TEST(p1.use_count() == 2); DLIB_TEST(p2.use_count() == 2); DLIB_TEST(p3.use_count() == 0); DLIB_TEST(p4.use_count() == 0); DLIB_TEST(p11.get() == realp1); DLIB_TEST(p11 == p1); DLIB_TEST(p22 == p2); DLIB_TEST(p3 == p4); DLIB_TEST(p11 != p22); DLIB_TEST(p1 != p2); DLIB_TEST(p3 != p1); DLIB_TEST(p3 != p11); DLIB_TEST(p3 != p2); p1 = p1 = p1; DLIB_TEST(p1.use_count() == 2); DLIB_TEST(p1->num == 1); DLIB_TEST(p11.use_count() == 2); p1.reset(); DLIB_TEST(p1.get() == 0); DLIB_TEST(p1.use_count() == 0); DLIB_TEST(p1.unique() == false); DLIB_TEST(p11.use_count() == 1); p11 = p2; DLIB_TEST(p1.use_count() == 0); DLIB_TEST(p1.unique() == false); DLIB_TEST(p11.use_count() == 3); DLIB_TEST(p11.unique() == false); // now p11, p2, and p22 all reference the same thing and the rest are null DLIB_TEST_MSG((p11 < p2) == false,""); DLIB_TEST_MSG((p2 < p11) == false,""); DLIB_TEST(get_deleter<D>(p4) == 0); p4 = p2; DLIB_TEST(get_deleter<D>(p4) != 0); DLIB_TEST(get_deleter<D>(p4) == get_deleter<D>(p2)); DLIB_TEST(get_deleter<D>(p4) == get_deleter<D>(p11)); DLIB_TEST(get_deleter<int>(p4) == 0); realp1 = new derived; p1.reset(realp1, &deleter_base); DLIB_TEST(p1.get() == realp1); DLIB_TEST(p1.unique()); DLIB_TEST(p1.use_count() == 1); DLIB_TEST(*get_deleter<Db>(p1) == &deleter_base); DLIB_TEST(p1 != p4); p4 = dynamic_pointer_cast<derived>(p1); DLIB_TEST(!p1.unique()); DLIB_TEST(p1.use_count() == 2); DLIB_TEST(p1 == p4); realp1 = new derived; p1.reset(realp1); DLIB_TEST(p1.get() == realp1); DLIB_TEST(p1.unique()); DLIB_TEST(p1.use_count() == 1); DLIB_TEST(get_deleter<D>(p1) == 0); auto_ptr<derived> ap1(new derived); auto_ptr<derived> ap2(new derived); ap1->num = 35; ap2->num = 36; DLIB_TEST(ap1.get() != 0); DLIB_TEST(ap2.get() != 0); p1 = ap2; p2 = ap1; DLIB_TEST(ap1.get() == 0); DLIB_TEST(p1.unique()); DLIB_TEST(p1.use_count() == 1); DLIB_TEST(ap2.get() == 0); DLIB_TEST(p2.unique()); DLIB_TEST(p2.use_count() == 1); DLIB_TEST(p1->num == 36); DLIB_TEST(p2->num == 35); } DLIB_TEST_MSG(counter == 0,counter); DLIB_TEST_MSG(deleter_called == 2,counter); dlib::weak_ptr<base> wp4; { dlib::shared_ptr<derived> p1(new derived, &deleter_base); dlib::shared_ptr<derived> p2; dlib::shared_ptr<base> p3; dlib::weak_ptr<derived> wp1; dlib::weak_ptr<base> wp2; dlib::weak_ptr<base> wp3; dlib::weak_ptr<derived> wp1c(p1); dlib::weak_ptr<base> wp2c(p1); dlib::weak_ptr<base> wp3c(p2); DLIB_TEST(wp1c.use_count() == 1); DLIB_TEST(wp1c.lock() == p1); DLIB_TEST(wp1c.expired() == false); DLIB_TEST(wp2c.use_count() == 1); DLIB_TEST(wp2c.lock() == p1); DLIB_TEST(wp2c.expired() == false); DLIB_TEST(wp3c.use_count() == 0); DLIB_TEST(wp3c.lock() == dlib::shared_ptr<base>()); DLIB_TEST(wp3c.expired() == true); DLIB_TEST(wp2.use_count() == 0); DLIB_TEST(wp2.expired() == true); DLIB_TEST(wp2.lock().use_count() == 0); DLIB_TEST(wp2.lock().unique() == false); wp1 = p1; wp2 = wp1; wp3 = p1; DLIB_TEST(p1.use_count() == 1); DLIB_TEST(p1.unique()); DLIB_TEST(wp1.use_count() == 1); DLIB_TEST(wp2.use_count() == 1); DLIB_TEST(wp3.use_count() == 1); DLIB_TEST(wp1.expired() == false); DLIB_TEST(wp2.expired() == false); DLIB_TEST(wp3.expired() == false); DLIB_TEST(wp1.lock() == p1); DLIB_TEST(wp2.lock() == p1); DLIB_TEST(wp3.lock() == p1); wp3.reset(); DLIB_TEST(p1.use_count() == 1); DLIB_TEST(p1.unique()); DLIB_TEST(wp1.use_count() == 1); DLIB_TEST(wp2.use_count() == 1); DLIB_TEST(wp3.use_count() == 0); DLIB_TEST(wp1.expired() == false); DLIB_TEST(wp2.expired() == false); DLIB_TEST(wp3.expired() == true); DLIB_TEST(wp1.lock() == p1); DLIB_TEST(wp2.lock() == p1); DLIB_TEST(wp3.lock() == dlib::shared_ptr<base>()); p1.reset(); DLIB_TEST(p1.use_count() == 0); DLIB_TEST(p1.unique() == false); DLIB_TEST(wp1.use_count() == 0); DLIB_TEST(wp2.use_count() == 0); DLIB_TEST(wp3.use_count() == 0); DLIB_TEST(wp1.expired() == true); DLIB_TEST(wp2.expired() == true); DLIB_TEST(wp3.expired() == true); DLIB_TEST(wp1.lock() == dlib::shared_ptr<base>()); DLIB_TEST(wp2.lock() == dlib::shared_ptr<base>()); DLIB_TEST(wp3.lock() == dlib::shared_ptr<base>()); p1.reset(new derived); DLIB_TEST(p1.use_count() == 1); DLIB_TEST(p1.unique() == true); DLIB_TEST(wp1.use_count() == 0); DLIB_TEST(wp2.use_count() == 0); DLIB_TEST(wp3.use_count() == 0); DLIB_TEST(wp1.expired() == true); DLIB_TEST(wp2.expired() == true); DLIB_TEST(wp3.expired() == true); DLIB_TEST(wp1.lock() == dlib::shared_ptr<base>()); DLIB_TEST(wp2.lock() == dlib::shared_ptr<base>()); DLIB_TEST(wp3.lock() == dlib::shared_ptr<base>()); DLIB_TEST(wp4.expired() == true); DLIB_TEST(wp4.lock() == dlib::shared_ptr<base>()); wp4 = p1; p3 = p1; DLIB_TEST(wp4.expired() == false); DLIB_TEST(wp4.lock() == p3); bool ok = false; try { dlib::shared_ptr<base> bad_ptr(wp1); } catch (dlib::bad_weak_ptr&) { ok = true; } DLIB_TEST(ok); } DLIB_TEST(wp4.expired() == true); DLIB_TEST(wp4.lock() == dlib::shared_ptr<base>()); DLIB_TEST_MSG(counter == 0,counter); DLIB_TEST_MSG(deleter_called == 3,counter); { scoped_ptr<int[]> a(new int[10]); { used_array_delete = false; scoped_ptr<int[],test_deleter<int[]> > b(new int[10]); for (int i = 0; i < 10; ++i) { a[i] = i; b[i] = i; } } DLIB_TEST(used_array_delete == true); { used_array_delete = true; scoped_ptr<int,test_deleter<int> > c(new int); } DLIB_TEST(used_array_delete == false); scoped_ptr<const int[]> const_a(new int[10]); } } class smart_pointers_tester : public tester { public: smart_pointers_tester ( ) : tester ("test_smart_pointers", "Runs tests on the smart pointers.") {} void perform_test ( ) { smart_pointers_test(); } } a; }