Philosophers

About project:

One or more philosophers sit at a round table. There is a large bowl of spaghetti in the middle of the table.
The philosophers alternatively eat, think, or sleep. While they are eating, they are not thinking nor sleeping; while thinking, they are not eating nor sleeping; and, of course, while sleeping, they are not eating nor thinking.
There are also forks on the table. There are as many forks as philosophers.
Because serving and eating spaghetti with only one fork is very inconvenient, a philosopher takes their right and their left forks to eat, one in each hand.
When a philosopher has finished eating, they put their forks back on the table and start sleeping. Once awake, they start thinking again. The simulation stops when a philosopher dies of starvation.
Every philosopher needs to eat and should never starve.
Philosophers don’t speak with each other.
Philosophers don’t know if another philosopher is about to die.

Each philosopher should be a thread.
There is one fork between each pair of philosophers. Therefore, if there are several philosophers, each philosopher has a fork on their left side and a fork on their right side. If there is only one philosopher, there should be only one fork on the table.
To prevent philosophers from duplicating forks, you should protect the forks state with a mutex for each of them.

All the forks are put in the middle of the table.
They have no states in memory but the number of available forks is represented by a semaphore.
Each philosopher should be a process. But the main process should not be a philosopher.

Program should take the following arguments:

number_of_philosophers time_to_die time_to_eat time_to_sleep [number_of_times_each_philosopher_must_eat]

Where:

number_of_philosophers: The number of philosophers and also the number of forks.
time_to_die (in milliseconds): If a philosopher didn’t start eating time_to_die milliseconds since the beginning of their last meal or the beginning of the simulation, they die.
time_to_eat (in milliseconds): The time it takes for a philosopher to eat. During that time, they will need to hold two forks.
time_to_sleep (in milliseconds): The time a philosopher will spend sleeping.
number_of_times_each_philosopher_must_eat (optional argument): If all philosophers have eaten at least number_of_times_each_philosopher_must_eat times, the simulation stops. If not specified, the simulation stops when a philosopher dies.

Example:

./philo 4 800 200 200 200

./philo 4 800 200 200 200 5