There are total 3 folders inside attachment. Client is same for all. airport.csv is file which is I am using for testing and file name is hardcoded in source code

1. M1_1 - Module 1 Basic Single process multi thread, multiple client can connect , It is uses busy waiting GET and PUT both will be served sequentially
2. M1_2 - Module 1 Working Single process multi thread, multiple client can connect , Uses unnamed semaphore Only one PUT and multiple GET if there is no PUT
3. M2_1 - Module 2 Basic Multi Process, Multi threaded. Uses named semaphore Only one PUT and multiple GET if there is no PUT

   Remaining to implement : Allowing concurrent write if key in PUT are different is remaining.

   Not sure about correct solution, but one way is

   1. Store all key value pair in hashMap [ If there are too many PUT we should not keep looping large file just to verify Value]
   2. serve all GET request from hashMap if it is not locked by PUT (No need to hit file for any GET request)
   3. For all PUT check KEY in hashMap concurrently if VALUE for KEY found different , Lock hashMap until it finish update to hashMap and same information in file, Once file is updated , Unlock hashMap, Wake up all threads

Compilation Instruction is same for each folder

• Compiling Server (Ignore Warning) archit@archit-pc:~/socket/Test/M1_2$ g++ server_M1_2.cpp -pthread -o server server_M1_2.cpp: In function ‘int main(int, char**)’: server_M1_2.cpp:211:76: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] rc = pthread_create( &threads[thread_no] , NULL , serveRequest ,(void *)newsockfd ) ;
• Compiling Client archit@archit-pc:~/socket/Test/M1_2$ g++ client.cpp -o client archit@archit-pc:~/socket/Test/M1_2$

Running Program Instruction

1. M1_1 and M2_2

   Server archit@archit-pc:~/socket/Test/M1_2$ ./server 1 8000 listening for clients request on port 8000

   Client (run same on multiple terminal) archit@archit-pc:~/socket/Test/M1_2$ ./client localhost 8000 Enter # to end the connection

   Go through the images for execution instructino 1.png - overall operation 2.png - shows created process 3_top-p-h_output.png - shows thread created by connection - 3 thread for serving 3 client and 1 parent thread - total 4 4_end_con.png - connection termination

2. M2_1

   Everything is same as above , except we need to initiate client on different port like archit@archit-pc:~/socket/Test/M2_1$ ./client localhost 8000 archit@archit-pc:~/socket/Test/M2_1$ ./client localhost 8001

   and so on… and same command in different terminal to create multiple thread for same port

   Please go through the snapshot added in folder