Presents utility code for POSIX Threads with error checking wrappers. Covers pthread_create, pthread_join, semaphore initialization, and compilation with -lpthread flag. Includes structure semantics and pointer handling for thread-safe code.

Provides Python threading wrapper code improving semaphore interface and thread creation. Includes keyboard interrupt handling with watcher process, signal management, and cleaner API for creating and managing multiple threads.

Explains semaphore implementation using Pthreads mutexes and condition variables. Covers wakeup counting, do-while loop usage, and Property 3 guarantee. Includes detailed C code for sem_wait and sem_signal functions.

Covers multithreaded C programming with Pthreads library. Demonstrates mutex implementation for shared variable protection, synchronization error detection through array checking, and proper thread creation and joining techniques.

Implements producer-consumer pattern with bounded buffer using coke machine simulation. Demonstrates capacity constraints, mutex protection for shared resources, and proper use of semaphores to prevent race conditions in Python.