Cpp and C projects

Simple jpeg decoder

Bulletin System with I/O multiplexing

A simple server application capable of handling post(posting content onto the bullentin board), pull(getting content from the bullentin board), exit(client exit). The bullentin board can have at most 5 servers accessing and each server can handle up to 20 clients.

• Using poll to enable I/O multiplexing in server.c
• Using filelock to prevent race condition

Event-driven server

An improvement of the bullentin system above.

• All read and write to client is checked after poll.
• Emphasize on how to manage state of the client in the event-driven server

Service Management System

Maintain a service tree consists of processes. Manager get user input from stdin, and act as the orchestrator to pass user's request to its children.

• fork, exec to create service
• pipe, FIFO to communicate between services
• Note: The judge.py is contributed by kenlina

Signal-driven User-level Thread Coroutine

Implement a signal-driven scheduling mechanism to context switch between threads of execution. The thread here is user-level threads, we did not use pthread library here. Use setjmp, longjmp to context switch between user-level threads mimicking a coroutine behavior.

• Coroutines are computer program components that allow execution to be suspended and resumed, generalizing subroutines for cooperative multitasking.

Simple shell: Wish

1. This is the project of OSTEP
2. See spec
3. See document