Added tests for new single-owner policy classes for StrongPtr.

git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@1081 7ec92016-0320-0410-acc4-a06ded1c099a

test/SmartPtr/strong.cpp

@@ -23,12 +23,21 @@
 
 #include <iostream>
 #include <cassert>
+#include <cstring>
 
 #include "base.h"
 
 
 // ----------------------------------------------------------------------------
 
+#if !defined( NULL )
+    #define nullptr 0
+#endif
+
+#if !defined( nullptr )
+    #define nullptr NULL
+#endif
+
 using namespace std;
 using namespace Loki;
 
@@ -140,6 +149,7 @@ typedef Loki::StrongPtr< Moon, true, TwoRefCounts, DisallowConversion,
     AssertCheck, AllowReset, DeleteSingle, DontPropagateConst >
     Moon_StrongPtr;
 
+
 // ----------------------------------------------------------------------------
 
 class Earth
@@ -329,6 +339,8 @@ void DoWeakLeakTest( void )
     const unsigned int ctorCount = Counted::GetCtorCount();
     const unsigned int dtorCount = Counted::GetDtorCount();
     assert( Counted::AllDestroyed() );
+    (void)ctorCount;
+    (void)dtorCount;
 
     {
         Counted_WeakPtr pWeakInt;
@@ -1028,6 +1040,586 @@ void DoWeakCycleTests( void )
 
 // ----------------------------------------------------------------------------
 
+class Ball
+{
+public:
+
+    inline static unsigned int GetCtorCount( void )
+    {
+        return s_CtorCount;
+    }
+
+    inline static unsigned int GetDtorCount( void )
+    {
+        return s_DtorCount;
+    }
+
+    inline static bool AllDestroyed( void )
+    {
+        return ( s_CtorCount == s_DtorCount );
+    }
+
+    inline Ball( void )
+    {
+        s_CtorCount++;
+    }
+
+    inline ~Ball( void )
+    {
+        s_DtorCount++;
+    }
+
+private:
+    static unsigned int s_CtorCount;
+    static unsigned int s_DtorCount;
+};
+
+unsigned int Ball::s_CtorCount = 0;
+unsigned int Ball::s_DtorCount = 0;
+
+// ----------------------------------------------------------------------------
+
+// These typedefs are for testing StrongPtr ownership policies that enforce a single owner.
+typedef ::Loki::StrongPtr< Ball, false, ::Loki::SingleOwnerRefCount,
+    ::Loki::DisallowConversion, ::Loki::AssertCheck, ::Loki::OnlyStrongMayReset >
+    NonOwner_Counted_BallPtr;
+typedef ::Loki::StrongPtr< Ball, true,  ::Loki::SingleOwnerRefCount,
+    ::Loki::DisallowConversion, ::Loki::AssertCheck, ::Loki::OnlyStrongMayReset >
+    Owner_Counted_BallPtr;
+
+typedef ::Loki::StrongPtr< Ball, false, ::Loki::Lockable1OwnerRefCount,
+    ::Loki::DisallowConversion, ::Loki::AssertCheck, ::Loki::OnlyStrongMayReset >
+    Lockable_NonOwner_Counted_BallPtr;
+typedef ::Loki::StrongPtr< Ball, true,  ::Loki::Lockable1OwnerRefCount,
+    ::Loki::DisallowConversion, ::Loki::AssertCheck, ::Loki::OnlyStrongMayReset >
+    Lockable_Owner_Counted_BallPtr;
+
+typedef ::Loki::StrongPtr< Ball, false, ::Loki::SingleOwnerRefLinks,
+    ::Loki::DisallowConversion, ::Loki::AssertCheck, ::Loki::OnlyStrongMayReset >
+    NonOwner_Linked_BallPtr;
+typedef ::Loki::StrongPtr< Ball, true,  ::Loki::SingleOwnerRefLinks,
+    ::Loki::DisallowConversion, ::Loki::AssertCheck, ::Loki::OnlyStrongMayReset >
+    Owner_Linked_BallPtr;
+
+// ----------------------------------------------------------------------------
+
+template < class OwnerPtr, class NonOwnerPtr >
+class TheOwner
+{
+public:
+
+    TheOwner( void ) : m_myBall(), m_otherBall() {}
+    ~TheOwner( void ) {}
+
+    void ClearBall( void )
+    {
+        Ball * pBall = NULL;
+        ResetAll( m_myBall, pBall );
+    }
+
+    bool OwnBall( const NonOwnerPtr & ball )
+    {
+        if ( !ball )
+            return false;
+        m_myBall = ball;
+        return true;
+    }
+
+    bool OwnBall( const OwnerPtr & ball )
+    {
+        if ( !ball )
+            return false;
+        m_myBall = ball;
+        return true;
+    }
+
+    bool OwnBall( Ball * ball )
+    {
+        if ( nullptr == ball )
+            return false;
+        m_myBall = ball;
+        return true;
+    }
+
+    bool DoesOwnBall( void ) const
+    {
+        const bool hasBall = m_myBall;
+        return hasBall;
+    }
+
+    void UseBall( const OwnerPtr & ball )
+    {
+        m_otherBall = ball;
+    }
+
+    bool DoesUseBall( void ) const
+    {
+        const bool hasBall = m_otherBall;
+        return hasBall;
+    }
+
+    const OwnerPtr & ShareMyBall( void ) const
+    {
+        return m_myBall;
+    }
+
+    const NonOwnerPtr & ShareOtherBall( void )
+    {
+        return m_otherBall;
+    }
+
+private:
+    OwnerPtr m_myBall;
+    NonOwnerPtr m_otherBall;
+};
+
+typedef TheOwner< Owner_Counted_BallPtr, NonOwner_Counted_BallPtr > Toddler;
+
+typedef TheOwner< Owner_Linked_BallPtr, NonOwner_Linked_BallPtr > Kitten;
+
+typedef TheOwner< Lockable_Owner_Counted_BallPtr, Lockable_NonOwner_Counted_BallPtr > Teenager;
+
+// ----------------------------------------------------------------------------
+
+template < class OwnerPtr, class NonOwnerPtr, class Owner >
+void DoSingleOwnerTest( OwnerPtr & op1,
+    const NonOwnerPtr & pBall1,
+    const NonOwnerPtr & pBall2,
+    const NonOwnerPtr & pBall3,
+    Owner & owner1,
+    Owner & owner2,
+    Owner & owner3 )
+{
+
+    assert( !pBall1.IsStrong() );
+    assert( !pBall2.IsStrong() );
+    assert( !pBall3.IsStrong() );
+    assert( pBall1 != nullptr );
+    assert( pBall2 != nullptr );
+    assert( pBall3 != nullptr );
+
+    assert( !owner1.DoesOwnBall() );
+    assert( !owner2.DoesOwnBall() );
+    assert( !owner3.DoesOwnBall() );
+    assert( !owner1.DoesUseBall() );
+    assert( !owner2.DoesUseBall() );
+    assert( !owner3.DoesUseBall() );
+
+    owner1.OwnBall( pBall1 );
+    owner2.OwnBall( pBall2 );
+    owner3.OwnBall( pBall3 );
+    assert( owner1.DoesOwnBall() );
+    assert( owner2.DoesOwnBall() );
+    assert( owner3.DoesOwnBall() );
+    assert( !owner1.DoesUseBall() );
+    assert( !owner2.DoesUseBall() );
+    assert( !owner3.DoesUseBall() );
+
+    assert( owner1.ShareMyBall() == pBall1 );
+    assert( owner2.ShareMyBall() == pBall2 );
+    assert( owner3.ShareMyBall() == pBall3 );
+    assert( owner1.ShareMyBall().IsStrong() );
+    assert( owner2.ShareMyBall().IsStrong() );
+    assert( owner3.ShareMyBall().IsStrong() );
+
+    owner1.UseBall( owner2.ShareMyBall() );
+    owner2.UseBall( owner3.ShareMyBall() );
+    owner3.UseBall( owner1.ShareMyBall() );
+    assert( owner1.DoesUseBall() );
+    assert( owner2.DoesUseBall() );
+    assert( owner3.DoesUseBall() );
+
+    assert( !owner1.ShareOtherBall().IsStrong() );
+    assert( !owner2.ShareOtherBall().IsStrong() );
+    assert( !owner3.ShareOtherBall().IsStrong() );
+
+    assert( owner1.ShareOtherBall() == pBall2 );
+    assert( owner2.ShareOtherBall() == pBall3 );
+    assert( owner3.ShareOtherBall() == pBall1 );
+    assert( owner1.ShareMyBall() == pBall1 );
+    assert( owner2.ShareMyBall() == pBall2 );
+    assert( owner3.ShareMyBall() == pBall3 );
+
+    try
+    {
+        assert( owner2.ShareMyBall() == pBall2 );
+        // Can owner1 own a ball that is owned by somebody else?
+        owner1.OwnBall( pBall2 );
+        assert( false );
+    }
+    catch ( const ::std::logic_error & ex )
+    {
+        assert( true );
+        assert( ::strcmp( ex.what(), ::Loki::StrongPtr_Single_Owner_Exception_Message ) == 0 );
+        (void)ex;
+    }
+    try
+    {
+        assert( owner3.ShareMyBall() == pBall3 );
+        // Can owner2 own a ball that is owned by somebody else?
+        owner2.OwnBall( pBall3 );
+        assert( false );
+    }
+    catch ( const ::std::logic_error & ex )
+    {
+        assert( true );
+        assert( ::strcmp( ex.what(), ::Loki::StrongPtr_Single_Owner_Exception_Message ) == 0 );
+        (void)ex;
+    }
+    try
+    {
+        assert( owner1.ShareMyBall() == pBall1 );
+        // Can owner3 own a ball that is owned by somebody else?
+        owner3.OwnBall( pBall1 );
+        assert( false );
+    }
+    catch ( const ::std::logic_error & ex )
+    {
+        assert( true );
+        assert( ::strcmp( ex.what(), ::Loki::StrongPtr_Single_Owner_Exception_Message ) == 0 );
+        (void)ex;
+    }
+
+    // These tests occur after exceptions were thrown.  Since these tests pass,
+    // that means the pointers are still in a valid state.  Also, the pointers
+    // are untouched by the temporary StrongPtr's that were made inside the
+    // assignment operators, so therefore the pointers have strong exception
+    // safety.
+    owner1.ClearBall();
+    owner2.ClearBall();
+    owner3.ClearBall();
+    assert( !owner1.DoesOwnBall() );
+    assert( !owner2.DoesOwnBall() );
+    assert( !owner3.DoesOwnBall() );
+    assert( nullptr == pBall1 );
+    assert( nullptr == pBall2 );
+    assert( nullptr == pBall3 );
+    assert( owner1.ShareMyBall() == pBall1 );
+    assert( owner2.ShareMyBall() == pBall2 );
+    assert( owner3.ShareMyBall() == pBall3 );
+    assert( owner1.ShareMyBall() == nullptr );
+    assert( owner2.ShareMyBall() == nullptr );
+    assert( owner3.ShareMyBall() == nullptr );
+
+    {
+        Ball * baseball = new Ball;
+        Ball * football = new Ball;
+        Ball * softball = new Ball;
+
+        NonOwnerPtr p1( baseball );
+        NonOwnerPtr p2( football );
+        NonOwnerPtr p3( softball );
+        assert( nullptr != p1 );
+        assert( nullptr != p2 );
+        assert( nullptr != p3 );
+
+        assert( !p1.IsStrong() );
+        assert( !p2.IsStrong() );
+        assert( !p3.IsStrong() );
+
+        {
+            Owner o1;
+            Owner o2;
+            Owner o3;
+
+            assert( !o1.DoesOwnBall() );
+            assert( !o2.DoesOwnBall() );
+            assert( !o3.DoesOwnBall() );
+            assert( !o1.DoesUseBall() );
+            assert( !o2.DoesUseBall() );
+            assert( !o3.DoesUseBall() );
+
+            o1.OwnBall( p1 );
+            o2.OwnBall( p2 );
+            o3.OwnBall( p3 );
+
+            assert( o1.DoesOwnBall() );
+            assert( o2.DoesOwnBall() );
+            assert( o3.DoesOwnBall() );
+            assert( !o1.DoesUseBall() );
+            assert( !o2.DoesUseBall() );
+            assert( !o3.DoesUseBall() );
+
+            assert( o1.ShareMyBall() == p1 );
+            assert( o2.ShareMyBall() == p2 );
+            assert( o3.ShareMyBall() == p3 );
+
+            o1.ClearBall();
+            o2.ClearBall();
+            o3.ClearBall();
+            assert( !o1.DoesOwnBall() );
+            assert( !o2.DoesOwnBall() );
+            assert( !o3.DoesOwnBall() );
+            assert( o1.ShareMyBall() == nullptr );
+            assert( o2.ShareMyBall() == nullptr );
+            assert( o3.ShareMyBall() == nullptr );
+            assert( nullptr == p1 );
+            assert( nullptr == p2 );
+            assert( nullptr == p3 );
+            assert( o1.ShareMyBall() == p1 );
+            assert( o2.ShareMyBall() == p2 );
+            assert( o3.ShareMyBall() == p3 );
+        }
+
+        assert( Ball::AllDestroyed() );
+        assert( nullptr == p1 );
+        assert( nullptr == p2 );
+        assert( nullptr == p3 );
+    }
+
+    {
+        OwnerPtr op_1;
+        OwnerPtr op_2;
+        (void)op_1;
+        (void)op_2;
+        op_1 = op_2;
+    }
+    assert( Ball::AllDestroyed() );
+
+    // Test ResetAll with owner pointer.
+    {
+        Ball * ball = new Ball;
+        Ball * noBall = nullptr;
+        OwnerPtr op_1( ball );
+        NonOwnerPtr np1( op_1 );
+        NonOwnerPtr np2( np1 );
+        assert( ball == op_1 );
+        assert( ball == np1 );
+        assert( ball == np2 );
+
+        ResetAll( op_1, noBall );
+        assert( Ball::AllDestroyed() );
+        assert( nullptr == op_1 );
+        assert( nullptr == np1 );
+        assert( nullptr == np2 );
+        assert( nullptr == noBall );
+    }
+
+    // Test ReleaseAll with owner pointer.
+    {
+        Ball * ball = new Ball;
+        Ball * noBall = nullptr;
+        OwnerPtr op_1( ball );
+        NonOwnerPtr np1( op_1 );
+        NonOwnerPtr np2( np1 );
+        assert( ball == op_1 );
+        assert( ball == np1 );
+        assert( ball == np2 );
+
+        ReleaseAll( op_1, noBall );
+        assert( !Ball::AllDestroyed() );
+        assert( nullptr != noBall );
+        assert( noBall == ball );
+        assert( nullptr == op_1 );
+        assert( nullptr == np1 );
+        assert( nullptr == np2 );
+        delete noBall;
+        assert( Ball::AllDestroyed() );
+    }
+
+    // Test ResetAll with nonowner pointer.
+    {
+        Ball * ball = new Ball;
+        Ball * noBall = nullptr;
+        OwnerPtr op_1( ball );
+        NonOwnerPtr np1( op_1 );
+        NonOwnerPtr np2( np1 );
+        assert( ball == op_1 );
+        assert( ball == np1 );
+        assert( ball == np2 );
+
+        ResetAll( np1, noBall );
+        // ResetAll fails for non-owner pointers.
+        assert( !Ball::AllDestroyed() );
+        assert( nullptr != op_1 );
+        assert( nullptr != np1 );
+        assert( nullptr != np2 );
+        assert( nullptr == noBall );
+    }
+    assert( Ball::AllDestroyed() );
+
+    // Test ReleaseAll with nonowner pointer.
+    {
+        Ball * ball = new Ball;
+        Ball * noBall = nullptr;
+        OwnerPtr op_1( ball );
+        NonOwnerPtr np1( op_1 );
+        NonOwnerPtr np2( np1 );
+        assert( ball == op_1 );
+        assert( ball == np1 );
+        assert( ball == np2 );
+
+        ReleaseAll( np1, noBall );
+        // ReleaseAll fails for non-owner pointers.
+        assert( !Ball::AllDestroyed() );
+        assert( nullptr != op_1 );
+        assert( nullptr != np1 );
+        assert( nullptr != np2 );
+        assert( nullptr == noBall );
+    }
+    assert( Ball::AllDestroyed() );
+
+    // Test assignment operator.
+    {
+        OwnerPtr op2;
+        Ball * ball1 = new Ball;
+        Ball * ball2 = new Ball;
+        op1 = ball1;
+        op2 = ball2;
+        assert( ball1 == op1 );
+        assert( ball2 == op2 );
+        op1 = nullptr;
+    }
+    assert( Ball::AllDestroyed() );
+
+    // Test the Swap function for strong co-pointers.
+    {
+        NonOwnerPtr np1;
+        NonOwnerPtr np2;
+        Ball * ball1 = new Ball;
+        Ball * ball2 = new Ball;
+        np1 = ball1;
+        np2 = ball2;
+        assert( ball1 == np1 );
+        assert( ball2 == np2 );
+        assert( nullptr != np1 );
+        assert( nullptr != np2 );
+
+        op1 = np1;
+        OwnerPtr op2( np2 );
+        assert( np1 == op1 );
+        assert( np2 == op2 );
+        assert( np2 != op1 );
+        assert( np1 != op2 );
+
+        op1.Swap( op2 );
+
+        assert( ball1 != op1 ); // Owners do not point to original objects.
+        assert( ball2 != op2 );
+        assert( ball2 == op1 ); // Owners now point to different objects.
+        assert( ball1 == op2 );
+        assert( ball1 != np2 ); // Non-owners still point to original objects.
+        assert( ball2 != np1 );
+        assert( ball2 == np2 ); // Non-owners do not point to different objects.
+        assert( ball1 == np1 );
+        assert( np1 != op1 );
+        assert( np2 != op2 );
+        assert( np2 == op1 );
+        assert( np1 == op2 );
+        assert( nullptr != op1 );
+        assert( nullptr != op2 );
+        assert( nullptr != np1 );
+        assert( nullptr != np2 );
+        op1 = nullptr;
+    }
+    assert( Ball::AllDestroyed() );
+
+    // Test the Swap function for weak co-pointers.
+    {
+        NonOwnerPtr np1;
+        NonOwnerPtr np2;
+        Ball * ball1 = new Ball;
+        Ball * ball2 = new Ball;
+        np1 = ball1;
+        np2 = ball2;
+        assert( ball1 == np1 );
+        assert( ball2 == np2 );
+        assert( nullptr != np1 );
+        assert( nullptr != np2 );
+
+        op1 = np1;
+        OwnerPtr op2( np2 );
+        assert( np1 == op1 );
+        assert( np2 == op2 );
+        assert( np2 != op1 );
+        assert( np1 != op2 );
+
+        np1.Swap( np2 );
+
+        assert( ball1 == op1 ); // Owners still point to their original objects.
+        assert( ball2 == op2 );
+        assert( ball2 != op1 ); // Owners do not point to different objects.
+        assert( ball1 != op2 );
+        assert( ball1 == np2 ); // Non-owners now point to different objects.
+        assert( ball2 == np1 );
+        assert( ball2 != np2 ); // Non-owners do not point to their original objects.
+        assert( ball1 != np1 );
+        assert( np1 != op1 );
+        assert( np2 != op2 );
+        assert( np2 == op1 );
+        assert( np1 == op2 );
+        assert( nullptr != op1 );
+        assert( nullptr != op2 );
+        assert( nullptr != np1 );
+        assert( nullptr != np2 );
+        op1 = nullptr;
+    }
+    assert( Ball::AllDestroyed() );
+
+    // A Swap of a weak pointer with a strong pointer will cause a compiler error.
+}
+
+// ----------------------------------------------------------------------------
+
+void DoSingleOwnerTests( void )
+{
+
+    // These tests exercise the lockable single-owner StrongPtr policies.
+    {
+        Ball * baseball = new Ball;
+        Ball * football = new Ball;
+        Ball * softball = new Ball;
+        Lockable_Owner_Counted_BallPtr op1;
+        Lockable_NonOwner_Counted_BallPtr pBaseball( baseball );
+        Lockable_NonOwner_Counted_BallPtr pFootball( football );
+        Lockable_NonOwner_Counted_BallPtr pSoftball( softball );
+        Teenager teen1;
+        Teenager teen2;
+        Teenager teen3;
+        DoSingleOwnerTest( op1, pBaseball, pFootball, pSoftball,
+            teen1, teen2, teen3 );
+    }
+    assert( Ball::AllDestroyed() );
+
+    // These tests exercise the reference-counted single-owner StrongPtr policies.
+    {
+        Ball * soccerBall = new Ball;
+        Ball * bouncyBall = new Ball;
+        Ball * basketBall = new Ball;
+
+        NonOwner_Counted_BallPtr pSoccerBall( soccerBall );
+        NonOwner_Counted_BallPtr pBouncyBall( bouncyBall );
+        NonOwner_Counted_BallPtr pBasketBall( basketBall );
+        Toddler child1;
+        Toddler child2;
+        Toddler child3;
+        Owner_Counted_BallPtr op1;
+        DoSingleOwnerTest( op1, pSoccerBall, pBouncyBall, pBasketBall,
+            child1, child2, child3 );
+    }
+    assert( Ball::AllDestroyed() );
+
+    // These tests exercise the linked-cycle single-owner StrongPtr policies.
+    {
+        Ball * yarnBall = new Ball;
+        Ball * twineBall = new Ball;
+        Ball * stringBall = new Ball;
+
+        NonOwner_Linked_BallPtr pYarnBall( yarnBall );
+        NonOwner_Linked_BallPtr pTwineBall( twineBall );
+        NonOwner_Linked_BallPtr pStringBall( stringBall );
+        Kitten cat1;
+        Kitten cat2;
+        Kitten cat3;
+        Owner_Linked_BallPtr op1;
+        DoSingleOwnerTest( op1, pYarnBall, pTwineBall, pStringBall,
+            cat1, cat2, cat3 );
+    }
+    assert( Ball::AllDestroyed() );
+}
+
+// ----------------------------------------------------------------------------
+
 void DoStrongForwardReferenceTest( void )
 {
     /** @note These lines should cause the compiler to make a warning message
@@ -1497,6 +2089,3 @@ void foo()
     // this will not compile:
     //int i = f1.i;
 }
-
-
-