Modify the main function in server.c to handle 's' and 'g' commands as well as creating new threads (blank line - no command)

Define a global struct in server.c with members of type:

• pthread_mutex_t go;
• pthread_cond_t cond;
• int stop;

and initialize. What initial values?

Create three functions to control the database client threads

• clientwait()
• clientgo()
• clientstop()

Use the global struct in these functions.

What should each one do and how should each one be implemented?