Fil-C Adds Memory‑Safe Context Switching with longjmp and setjmp

Fil-C, a C‑like language for secure programming, has introduced a new feature for context switching. The feature implements memory‑safe versions of the traditional longjmp and setjmp primitives. Developers can now capture and restore execution state without risking memory corruption. The implementation checks stack boundaries and validates saved contexts before jumping. This approach preserves the low‑level control of longjmp/setjmp while adding safety guarantees. The addition targets use‑cases such as coroutines, lightweight threading, and exception handling. Early benchmarks suggest minimal overhead compared with the unsafe counterparts. The Fil-C project encourages further contributions to expand safe low‑level constructs.