prototype: pEp::PODStruct - created default alloc/free, and a constructor to provide custom alloc/free

test/test_nr1.cc

@@ -432,24 +432,23 @@ namespace pEp {
         PODStruct() = delete;
 
         // Creates a new instance or binds an existing one
+        PODStruct(bool is_owner, T** c_struct_pp = nullptr)
+        {
+            pEpLogClass("called");
+            _init(is_owner, c_struct_pp);
+        }
+
+        // Creates a new instance or binds an existing one
+        // but takes custom alloc/free functions
         PODStruct(
             bool is_owner,
             std::function<T*()> alloc,
             std::function<void(T*)> free,
             T** c_struct_pp = nullptr) :
-            _alloc(std::move(alloc)),
-            _free(std::move(free))
+            _effective_alloc(std::move(alloc)),
+            _effective_free(std::move(free))
         {
-            pEpLogClass("called");
-
-            // if no pp is given, alloc new,
-            // otherwise bind to it
-            if (!c_struct_pp) {
-                _c_struct_p = _alloc();
-                bind(is_owner, &_c_struct_p);
-            } else {
-                bind(is_owner, c_struct_pp);
-            }
+            _init(is_owner, c_struct_pp);
         }
 
         void bind(bool is_owner, T** c_struct_pp)
@@ -473,7 +472,7 @@ namespace pEp {
         ~PODStruct()
         {
             if (_is_owner) {
-                _free(_c_struct_p);
+                _effective_free(_c_struct_p);
             }
         }
 
@@ -501,9 +500,9 @@ namespace pEp {
 
         static bool log_enabled;
 
-    protected:
-        const std::function<T*()> _alloc;
-        const std::function<void(T*)> _free;
+    private:
+        const std::function<T*()> _effective_alloc{ _alloc };
+        const std::function<void(T*)> _effective_free{ _free };
 
         bool _is_bound{ false };
         bool _is_owner{ false };
@@ -517,6 +516,32 @@ namespace pEp {
         public:
             explicit Exception(const std::string& msg) : std::runtime_error(msg) {}
         };
+
+        void _init(bool is_owner, T** c_struct_pp)
+        {
+            // if no pp is given, alloc new,
+            // otherwise bind to it
+            if (!c_struct_pp) {
+                _c_struct_p = _effective_alloc();
+                bind(is_owner, &_c_struct_p);
+            } else {
+                bind(is_owner, c_struct_pp);
+            }
+        }
+
+        // default alloc/free
+        static T* _alloc()
+        {
+            T* ret = (T*)calloc(1, sizeof(T));
+            pEpLog(CXX::Inspect::all(ret));
+            return ret;
+        }
+
+        static void _free(T* ptr)
+        {
+            pEpLog(CXX::Inspect::all(ptr));
+            free(ptr);
+        }
     };
 
     // TOOD: