Win: Add nspace, boundary_descriptor

Signed-off-by: Simon Rozman <simon@rozman.si>

include/WinStd/BCrypt.h

@@ -125,7 +125,7 @@ namespace winstd
             if (this != std::addressof(h)) {
                 if (m_h != invalid)
                     free_internal();
-                if (h)
+                if (h.valid())
                     duplicate_internal(h);
                 else
                     m_h = invalid;

include/WinStd/COM.h

@@ -1665,7 +1665,7 @@ namespace winstd
             };
             sa = SafeArrayCreate(VT_VARIANT, _countof(dim), dim);
         }
-        if (!sa)
+        if (!sa.valid())
             throw std::bad_alloc();
 
         assert(SafeArrayGetElemsize(sa) == sizeof(VARIANT));

include/WinStd/Win.h

@@ -1985,6 +1985,72 @@ namespace winstd
         }
     };
 
+    ///
+    /// Namespace handle wrapper
+    ///
+    /// \sa [CreatePrivateNamespace function](https://learn.microsoft.com/en-us/windows/win32/api/namespaceapi/nf-namespaceapi-createprivatenamespacew)
+    ///
+    class nspace : public handle<HANDLE, NULL>
+    {
+        WINSTD_HANDLE_IMPL(nspace, HANDLE, NULL)
+
+    public:
+        ///
+        /// Closes an open namespace handle.
+        ///
+        /// \sa [ClosePrivateNamespace function](https://learn.microsoft.com/en-us/windows/win32/api/namespaceapi/nf-namespaceapi-closeprivatenamespace)
+        ///
+        virtual ~nspace()
+        {
+            if (m_h != invalid)
+                free_internal();
+        }
+
+    protected:
+        ///
+        /// Closes an open namespace handle.
+        ///
+        /// \sa [ClosePrivateNamespace function](https://learn.microsoft.com/en-us/windows/win32/api/namespaceapi/nf-namespaceapi-closeprivatenamespace)
+        ///
+        void free_internal() noexcept override
+        {
+            ClosePrivateNamespace(m_h, 0);
+        }
+    };
+
+    ///
+    /// Boundary descriptor handle wrapper
+    ///
+    /// \sa [CreateBoundaryDescriptor function](https://learn.microsoft.com/en-us/windows/win32/api/namespaceapi/nf-namespaceapi-createboundarydescriptorw)
+    ///
+    class boundary_descriptor : public handle<HANDLE, NULL>
+    {
+        WINSTD_HANDLE_IMPL(boundary_descriptor, HANDLE, NULL)
+
+    public:
+        ///
+        /// Deletes the specified boundary descriptor.
+        ///
+        /// \sa [DeleteBoundaryDescriptor function](https://learn.microsoft.com/en-us/windows/win32/api/namespaceapi/nf-namespaceapi-deleteboundarydescriptor)
+        ///
+        virtual ~boundary_descriptor()
+        {
+            if (m_h != invalid)
+                free_internal();
+        }
+
+    protected:
+        ///
+        /// Deletes the specified boundary descriptor.
+        ///
+        /// \sa [DeleteBoundaryDescriptor function](https://learn.microsoft.com/en-us/windows/win32/api/namespaceapi/nf-namespaceapi-deleteboundarydescriptor)
+        ///
+        void free_internal() noexcept override
+        {
+            DeleteBoundaryDescriptor(m_h);
+        }
+    };
+
     /// @}
 
     /// \addtogroup WinStdExceptions