philosophers (@42Paris)

"I’ve never thought philosophy would be so deadly"

About

Philosophers is a project of the mandatory part of the cursus. It's only made in C and the main goal was to understand how threads works in language C and use them to solve a logical problem. The simulation will stop if all philosophers have eaten enough or if one philosopher die.

• There are three different version of the algorithm :

  • Philo_one is about using threads and mutexs
  • Philo_two is about using threads and semaphores
  • Philo_three is about using processes and semaphores

• Here is the subject

This project was code for MACOS

Building and running the project

1. Download/Clone this repo

    git clone https://github.com/llefranc/42_philosophers.git
   

2. cd into the root directory, then cd into philo_x (one, two or three) and run make

    cd 42_philosophers/philo_one
    make
   

3. run ./philo_x arg1 arg2 arg3 arg4 (arg5) from the directory philo_x.

   • arg1 is the number of philosopher
   • arg2 is the time to die in ms
   • arg3 is the time to eat in ms
   • arg4 is the time to sleep in ms
   • arg5 (optional) is the number of time each philosopher needs to eat to end the simulation

Sources

• Programmation système en C sous UNIX (FR)
• Processus et threads (FR)
• Cours sur les threads (FR)
• Optimizing philo algo
• Comprendre les sémaphores (FR)
• How to use sempahores on fork processes