Import thekla_atlas

As requested by reduz, an import of thekla_atlas into thirdparty/

1 files changed, 322 insertions, 0 deletions

diff --git a/thirdparty/thekla_atlas/nvcore/Ptr.h b/thirdparty/thekla_atlas/nvcore/Ptr.h
new file mode 100644
index 0000000000..b43039274b
--- /dev/null
+++ b/thirdparty/thekla_atlas/nvcore/Ptr.h
@@ -0,0 +1,322 @@
+// This code is in the public domain -- Ignacio Castaņo <castano@gmail.com>
+
+#ifndef NV_CORE_PTR_H
+#define NV_CORE_PTR_H
+
+#include "nvcore.h"
+#include "Debug.h"
+
+#include "RefCounted.h"
+
+namespace nv
+{
+    class WeakProxy;
+
+    /** Simple auto pointer template class.
+    *
+    * This is very similar to the standard auto_ptr class, but with some 
+    * additional limitations to make its use less error prone:
+    * - Copy constructor and assignment operator are disabled.
+    * - reset method is removed.
+    * 
+    * The semantics of the standard auto_ptr are not clear and change depending
+    * on the std implementation. For a discussion of the problems of auto_ptr read:
+    * http://www.awprofessional.com/content/images/020163371X/autoptrupdate\auto_ptr_update.html
+    */
+    template <class T>
+    class AutoPtr
+    {
+        NV_FORBID_COPY(AutoPtr);
+        NV_FORBID_HEAPALLOC();
+    public:
+
+        /// Ctor.
+        AutoPtr(T * p = NULL) : m_ptr(p) { }
+
+        template <class Q>
+        AutoPtr(Q * p) : m_ptr(static_cast<T *>(p)) { }
+
+        /// Dtor. Deletes owned pointer.
+        ~AutoPtr() {
+            delete m_ptr;
+            m_ptr = NULL;
+        }
+
+        /// Delete owned pointer and assign new one.
+        void operator=( T * p ) {
+            if (p != m_ptr)
+            {
+                delete m_ptr;
+                m_ptr = p;
+            }
+        }
+
+        template <class Q>
+        void operator=( Q * p ) {
+            if (p != m_ptr)
+            {
+                delete m_ptr;
+                m_ptr = static_cast<T *>(p);
+            }
+        }
+
+        /// Member access.
+        T * operator -> () const {
+            nvDebugCheck(m_ptr != NULL);
+            return m_ptr;
+        }
+
+        /// Get reference.
+        T & operator*() const {
+            nvDebugCheck(m_ptr != NULL);
+            return *m_ptr;
+        }
+
+        /// Get pointer.
+        T * ptr() const { return m_ptr; }
+
+        /// Relinquish ownership of the underlying pointer and returns that pointer.
+        T * release() {
+            T * tmp = m_ptr;
+            m_ptr = NULL;
+            return tmp;
+        }
+
+        /// Const pointer equal comparation.
+        friend bool operator == (const AutoPtr<T> & ap, const T * const p) {
+            return (ap.ptr() == p);
+        }
+
+        /// Const pointer nequal comparation.
+        friend bool operator != (const AutoPtr<T> & ap, const T * const p) {
+            return (ap.ptr() != p);
+        }
+
+        /// Const pointer equal comparation.
+        friend bool operator == (const T * const p, const AutoPtr<T> & ap) {
+            return (ap.ptr() == p);
+        }
+
+        /// Const pointer nequal comparation.
+        friend bool operator != (const T * const p, const AutoPtr<T> & ap) {
+            return (ap.ptr() != p);
+        }
+
+    private:
+        T * m_ptr;
+    };
+
+
+    /// Smart pointer template class.
+    template <class BaseClass>
+    class SmartPtr {
+    public:
+
+        // BaseClass must implement addRef() and release().
+        typedef SmartPtr<BaseClass> ThisType;
+
+        /// Default ctor.
+        SmartPtr() : m_ptr(NULL) 
+        {
+        }
+
+        /// Other type assignment.
+        template <class OtherBase>
+        SmartPtr( const SmartPtr<OtherBase> & tc )
+        {
+            m_ptr = static_cast<BaseClass *>( tc.ptr() );
+            if (m_ptr) {
+                m_ptr->addRef();
+            }
+        }
+
+        /// Copy ctor.
+        SmartPtr( const ThisType & bc )
+        {
+            m_ptr = bc.ptr();
+            if (m_ptr) {
+                m_ptr->addRef();
+            }
+        }
+
+        /// Copy cast ctor. SmartPtr(NULL) is valid.
+        explicit SmartPtr( BaseClass * bc )
+        {
+            m_ptr = bc;
+            if (m_ptr) {
+                m_ptr->addRef();
+            }
+        }
+
+        /// Dtor.
+        ~SmartPtr()
+        {
+            set(NULL);
+        }
+
+
+        /// -> operator.
+        BaseClass * operator -> () const
+        {
+            nvCheck( m_ptr != NULL );
+            return m_ptr;
+        }
+
+        /// * operator.
+        BaseClass & operator*() const
+        {
+            nvCheck( m_ptr != NULL );
+            return *m_ptr;
+        }
+
+        /// Get pointer.
+        BaseClass * ptr() const
+        {
+            return m_ptr;
+        }
+
+        /// Other type assignment.
+        template <class OtherBase>
+        void operator = ( const SmartPtr<OtherBase> & tc )
+        {
+            set( static_cast<BaseClass *>(tc.ptr()) );
+        }
+
+        /// This type assignment.
+        void operator = ( const ThisType & bc )
+        {
+            set( bc.ptr() );
+        }
+
+        /// Pointer assignment.
+        void operator = ( BaseClass * bc )
+        {
+            set( bc );
+        }
+
+
+        /// Other type equal comparation.
+        template <class OtherBase>
+        bool operator == ( const SmartPtr<OtherBase> & other ) const
+        {
+            return m_ptr == other.ptr();
+        }
+
+        /// This type equal comparation.
+        bool operator == ( const ThisType & bc ) const
+        {
+            return m_ptr == bc.ptr();
+        }
+
+        /// Const pointer equal comparation.
+        bool operator == ( const BaseClass * const bc ) const
+        {
+            return m_ptr == bc;
+        }
+
+        /// Other type not equal comparation.
+        template <class OtherBase>
+        bool operator != ( const SmartPtr<OtherBase> & other ) const
+        {
+            return m_ptr != other.ptr();
+        }
+
+        /// Other type not equal comparation.
+        bool operator != ( const ThisType & bc ) const
+        {
+            return m_ptr != bc.ptr();
+        }
+
+        /// Const pointer not equal comparation.
+        bool operator != (const BaseClass * const bc) const
+        {
+            return m_ptr != bc;
+        }
+
+        /// This type lower than comparation.
+        bool operator < (const ThisType & p) const
+        {
+            return m_ptr < p.ptr();
+        }
+
+        bool isValid() const {
+            return isValidPtr(m_ptr);
+        }
+
+    private:
+
+        // Set this pointer.
+        void set( BaseClass * p )
+        {
+            if (p) p->addRef();
+            if (m_ptr) m_ptr->release();
+            m_ptr = p;
+        }
+
+    private:
+
+        BaseClass * m_ptr;
+
+    };
+
+
+    /// Smart pointer template class.
+    template <class T>
+    class WeakPtr {
+    public:
+
+        WeakPtr() {}
+
+        WeakPtr(T * p)  { operator=(p); }
+        WeakPtr(const SmartPtr<T> & p) { operator=(p.ptr()); }
+
+        // Default constructor and assignment from weak_ptr<T> are OK.
+
+        void operator=(T * p)
+        {
+            if (p) {
+                m_proxy = p->getWeakProxy();
+                nvDebugCheck(m_proxy != NULL);
+                nvDebugCheck(m_proxy->ptr() == p);
+            }
+            else {
+                m_proxy = NULL;
+            }
+        }
+
+        void operator=(const SmartPtr<T> & ptr) { operator=(ptr.ptr()); }
+
+        bool operator==(const SmartPtr<T> & p) const { return ptr() == p.ptr(); }
+        bool operator!=(const SmartPtr<T> & p) const { return ptr() != p.ptr(); }
+
+        bool operator==(const WeakPtr<T> & p) const { return ptr() == p.ptr(); }
+        bool operator!=(const WeakPtr<T> & p) const { return ptr() != p.ptr(); }
+
+        bool operator==(T * p) const { return ptr() == p; }
+        bool operator!=(T * p) const { return ptr() != p; }
+
+        T * operator->() const
+        {
+            T * p = ptr();
+            nvDebugCheck(p != NULL);
+            return p;
+        }
+
+        T * ptr() const
+        {
+            if (m_proxy != NULL) {
+                return static_cast<T *>(m_proxy->ptr());
+            }
+            return NULL;
+        }
+
+    private:
+
+        mutable SmartPtr<WeakProxy> m_proxy;
+
+    };
+
+
+} // nv namespace
+
+#endif // NV_CORE_PTR_H