- Test spin_lock basic operations and mutual exclusion
- Test spin_lock critical section protection
- Test spin_lock concurrent access and contention
- Test rw_lock write lock (exclusive access)
- Test rw_lock read lock (shared access)
- Test multiple concurrent readers
- Test writers have exclusive access
- Test readers and writers don't overlap
- Test various read-write patterns
- Test rapid lock/unlock operations
- Test mixed concurrent operations
- Test write lock blocks readers correctly
- Test condition variable construction (default and named)
- Test wait, notify, and broadcast operations
- Test timed wait with timeout and infinite wait
- Test integration with mutex for synchronization
- Test producer-consumer patterns with condition variables
- Test multiple waiters with broadcast
- Test spurious wakeup handling patterns
- Test named condition variable sharing between threads
- Test resource cleanup (clear, clear_storage)
- Test edge cases (after clear, immediate notify)
- Test semaphore construction (default and named with count)
- Test wait and post operations
- Test timed wait with various timeout values
- Test producer-consumer patterns
- Test multiple producers and consumers scenarios
- Test concurrent post operations
- Test initial count behavior
- Test named semaphore sharing between threads
- Test resource cleanup (clear, clear_storage)
- Test edge cases (zero timeout, after clear, high frequency)
- Test mutex construction (default and named)
- Test lock/unlock operations
- Test try_lock functionality
- Test timed lock with various timeout values
- Test critical section protection
- Test concurrent access and contention scenarios
- Test inter-thread synchronization with named mutex
- Test resource cleanup (clear, clear_storage)
- Test native handle access
- Test edge cases (reopen, zero timeout, rapid operations)
- Test exception safety of try_lock
- Test low-level API (acquire, get_mem, release, remove)
- Test reference counting functionality (get_ref, sub_ref)
- Test high-level handle class interface
- Test all handle methods (valid, size, name, get, etc.)
- Test handle lifecycle (construction, move, swap, assignment)
- Test different access modes (create, open, create|open)
- Test detach/attach functionality
- Test multi-handle access to same memory
- Test data persistence across handles
- Test edge cases (large segments, multiple simultaneous handles)
- Test all constructors (default, with destructor, from array, from char)
- Test move semantics and assignment operators
- Test all accessor methods (data, size, empty, get<T>)
- Test conversion methods (to_tuple, to_vector)
- Test comparison operators (==, !=)
- Test edge cases (empty buffers, large buffers, self-assignment)
- Verify destructor callback functionality
- Move all existing test files (*.cpp, *.h) to test/archive/
- Rename CMakeLists.txt to CMakeLists.txt.old in archive
- Prepare for comprehensive unit test refactoring
