in C language

Exercise 14.3.17: Consider two roommates who share a refrigerator and who-as conscientious roommates ensure the refrigerator is always stocked with only one bottle of milk. However, even with such kind room- mates, the following problematic scenario is possible: Roommate 1's actions Roommate 2's actions 3:00 Look in fridge; out of milk. 3:05 Leave for market. 3:10 Arrive at market. 3:15 Buy milk 3:20 Arrive home; put milk in fridge. 3:25 3:30 3:35 Look in fridge; out of milk. Leave for market. Arrive at market. Buy milk. Arrive home; put milk in fridge. Sigh "Oh no!" Write a complete Go program to solve this problem i.e., to eliminate the race condition above) without busy waiting. Your main function will spawn only two goroutines. Do not give more than 25 lines of code