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OpenFace/lib/3rdParty/dlib/include/dlib/test/smart_pointers.cpp
unknown 57e58a6949 Master commit of OpenFace.
2016-04-28 15:40:36 -04:00

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// 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"
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;
}
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