/bankers_algorithm

Banker's Algorithm implementation in C for resource allocation and deadlock avoidance.

Primary LanguageC

Banker's Algorithm Implementation in C

This repository contains an implementation of the Banker's Algorithm in C. The Banker's Algorithm is a resource allocation and deadlock avoidance algorithm used in operating systems.

Table of Contents

  1. Introduction
  2. Usage
  3. Implementation Details
  4. Sample Input File Format
  5. License

Introduction

The Banker's Algorithm is a deadlock avoidance algorithm that helps in preventing deadlocks by ensuring that processes do not enter an unsafe state. It operates by maintaining a data structure that represents the current state of the system, including resource allocation, maximum resource requirements, and available resources. Based on this information, it determines if a resource request from a process can be safely granted without leading the system into an unsafe state, which could result in a deadlock.

Usage

To use this implementation, follow these steps:

  1. Compile the code using a C compiler (e.g., gcc). 
    gcc banker.c -o banker
  2. Prepare a data file containing information about the system state. Each line of the file should represent the allocation and maximum resource requirements of a process, followed by the available resources.
  3. Execute the compiled program, providing the path to the data file as a command-line argument. 
    ./banker datafile.txt
  4. Follow the on-screen instructions to interact with the program. You can print the current system state, find if the system is in a safe state, request resources, release resources, or exit the program.

Implementation Details

  • The implementation includes functions for system initialization, printing the current state, checking if the system is in a safe state, requesting resources, and releasing resources.
  • The system_state struct represents the state of the system, including resource allocation, maximum resource requirements, need, and available resources.
  • The initialization function reads input data from a file and initializes the system state accordingly.
  • The is_safe function implements the Banker's Algorithm to check if the system is in a safe state.
  • The request function handles resource requests from processes, ensuring that the request does not lead to an unsafe state.
  • The release function handles resource release requests from processes.

Sample Input File Format

A sample input file should contain the following information:

<allocation_matrix>

<maximum_matrix>

<available_resources>

For example:

0 1 0
2 0 0
3 0 2
2 1 1
0 0 2

7 5 3
3 2 2
9 0 2
2 2 2
4 3 3

3 3 2

Feel free to contribute to this project by submitting bug reports, feature requests, or pull requests. Enjoy using the Banker's Algorithm implementation in C!