Need help with the following C++ program. The program itself deals with mutexes and locks but I can not figure out how to increment the output correctly.

The output should look like something like:

Thread 1: Incrementing counter. Current value: 1

Thread 2: Incrementing counter. Current value: 2

Thread 1: Incrementing counter. Current value: 3

Thread 2: Incrementing counter. Current value: 4

etc...

Instead my output looks like:

Thread 1: Incrementing counter. Current value: 1 Thread 1: Incrementing counter. Current value: 2 Thread 1: Incrementing counter. Current value: 3 Thread 1: Incrementing counter. Current value: 4 Thread 2: Incrementing counter. Current value: 5 Thread 2: Incrementing counter. Current value: 6 Thread 2: Incrementing counter. Current value: 7 Thread 2: Incrementing counter. Current value: 8 Thread 2: Incrementing counter. Current value: 9 Thread 1: Incrementing counter. Current value: 10 Final counter value:10