SystemVerilog OOP Mastery · All levels
No Destructors or GC APIs (Handle Lifetime Semantics)
SystemVerilog has no user-defined destructor and no manual delete for class objects. Cleanup must be explicit via close()/release() APIs; never rely on RAII-style teardown.
Overview
SystemVerilog has no user-defined destructor and no manual delete for class objects. Cleanup must be explicit via close()/release() APIs; never rely on RAII-style teardown.
In C++, destructors are deterministic for stack objects and drive RAII patterns, which make cleanup automatic at scope exit. Java has garbage collection plus structured cleanup primitives like try-with-resources for deterministic external resource release.
In this topic
1. Concept Explained
2. Code Examples
3. SystemVerilog vs C++/Java
4. Pitfalls
5. Exercises
6. Interview QuestionsRead the concept first, study the code examples, compare against C++/Java, then test yourself with the exercises and interview questions.
SystemVerilog versus C++ OOP matrix
SV VS C++ FEATURE MATRIX
+------------------------+-------------------+------------------------+
| capability | SystemVerilog | C++ |
+------------------------+-------------------+------------------------+
| multiple inheritance | no | yes |
| interfaces as classes | interface class | abstract class idiom |
| templates | parameterized cls | templates |
| memory control | GC-like handles | manual/RAII/smart ptr |
| reflection/factory use | common in UVM | framework dependent |
+------------------------+-------------------+------------------------+
SV OOP is tuned for verification productivity over low-level control.