memory-safety-patterns

Memory-safety patterns like RAII (Resource Acquisition Is Initialization) and ownership models tie resource cleanup to object lifetime, automatically freeing memory when objects go out of scope. This prevents use-after-free, double-free, and leak bugs by making cleanup deterministic and enforced at compile time in Rust or runtime in C++.

Rust ownership is a compile-time borrow-checker system that prevents unsafe access before it occurs; C++ smart pointers (unique_ptr, shared_ptr) provide runtime reference counting and deterministic cleanup via RAII. Rust catches memory errors at compile time; C++ enforces them through destructor patterns and lifetime scopes.

RAII patterns wrap resources (files, sockets) in objects whose destructors automatically close handles when they leave scope. Rust's ownership and lifetimes enforce this at compile time; C++ uses smart pointers and custom destructors; C requires manual discipline or wrapper macros to guarantee cleanup.

Memory-safety patterns including ownership transfer, smart pointers, and lifetime management prevent buffer overflows by enforcing bounds at the language level. Rust eliminates data races through its type system; C++ and C require careful synchronization and bounds checking to avoid concurrent access bugs.

Choose Rust when compile-time memory and concurrency safety are non-negotiable; its borrow checker prevents entire classes of bugs without runtime overhead. Choose C++ when you need fine-grained control or integrating with existing C++ codebases; it relies on disciplined RAII and smart-pointer patterns instead.

C manual memory management lacks language-level ownership or lifetime guarantees, making it prone to leaks, use-after-free, and double-free if allocation and deallocation are not perfectly paired. Wrapper patterns and coding discipline can mitigate risk but cannot eliminate it like Rust's compile-time checks.