https://github.com/anthippi/os-project
Σύστημα διαχείρισης παραγγελιών πίτσας με χρήση POSIX threads και μηχανισμών συγχρονισμού (mutexes, condition variables) σε Linux/Lubuntu
https://github.com/anthippi/os-project
c conditionvariables lubuntu mutexes posix-threads pthreads
Last synced: about 2 months ago
JSON representation
Σύστημα διαχείρισης παραγγελιών πίτσας με χρήση POSIX threads και μηχανισμών συγχρονισμού (mutexes, condition variables) σε Linux/Lubuntu
- Host: GitHub
- URL: https://github.com/anthippi/os-project
- Owner: Anthippi
- License: mit
- Created: 2023-05-10T09:56:54.000Z (about 2 years ago)
- Default Branch: main
- Last Pushed: 2025-03-21T21:28:47.000Z (2 months ago)
- Last Synced: 2025-03-21T22:27:15.986Z (2 months ago)
- Topics: c, conditionvariables, lubuntu, mutexes, posix-threads, pthreads
- Language: C
- Homepage:
- Size: 626 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.en.md
- License: LICENSE
Awesome Lists containing this project
README
# Pizza Order Management System with POSIX Threads
This project implements a pizza order management system using **POSIX threads (pthreads)** and synchronization mechanisms (mutexes, condition variables) on **Linux/Lubuntu**. The code simulates the concurrent operation of customers, cooks, ovens, packers, and delivery personnel.
## Functionality Overview
### 1. Order Process
- Each customer is represented as a **separate thread**.
- Customers connect at random intervals and place orders:
- Random number of pizzas (1-5).
- **60% probability** for a plain pizza (`Cplain = €10`) and **40%** for a special pizza (`Cspecial = €12`).
- **10% chance** for the order to fail.
### 2. Resource Management
- **Resource tracking** using mutexes and condition variables:
- **Cooks**: `Ncook = 2` (prepares pizzas in `Tprep = 1 minute/pizza`).
- **Ovens**: `Noven = 15` (bakes pizzas in `Tbake = 10 minutes`).
- **Packers**: `Npacker = 2` (packs pizzas in `Tpack = 1 minute/pizza`).
- **Delivery Personnel**: `Ndeliverer = 10` (delivers orders in random time `5-15 minutes`).
### 3. Statistics
At the end of execution, the system displays:
- Total income, failed/successful orders.
- Sales count per pizza type.
- Average and maximum delivery time.
- Waiting times for baking and packing.
## Code Structure
- **Main File**: `pizzeria.c`
Contains thread creation logic, resource synchronization, and statistics.
- **Header File**: `pizzeria.h`
Defines constants (e.g., number of cooks, timers).
- **Test Script**: `test-res.sh`
Compiles and runs the code:
```bash
gcc pizzeria.c -o main -pthread
./main 100 1000 # 100 orders, seed=1000```
## Notes
- The code is written for Linux/Lubuntu.
- Parallelism is used to simulate concurrent processes (e.g., multiple customers ordering simultaneously).
## Example Execution
```bash
$ ./test-res.sh
Order #1 has been registered.
Cook #1 is handling order #1
...
Total income: €1500
Failed orders: 5
Successful orders: 95
Total special pizzas sold: 38
Total normal pizzas sold: 57```