Exercise: Commit/Rollback Via SIGUSR1/SIGUSR2

See also

• Event Loop Support: signalfd()

• Signals

• A Naive C++ Eventloop (poll())

In the last exercise, we added graceful termination to our database application. The application then has a chance to commit the changes before exiting.

Lets add more commit/rollback logic to the application so that it reacts on two more signals, SIGUSR1 and SIGUSR2.

• SIGUSR1 commits the database

• SIGUSR2 rolls back the database