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philo/sources/routine.c

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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   routine.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/06/11 11:42:31 by rparodi           #+#    #+#             */
+/*   Updated: 2024/06/20 15:04:13 by rparodi          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "../includes/philo.h"
+
+t_bool	dead_loop(t_philo *philo)
+{
+	pthread_mutex_lock(philo->dead_lock);
+	if (*philo->dead_check == true)
+		return (pthread_mutex_unlock(philo->dead_lock), true);
+	pthread_mutex_unlock(philo->dead_lock);
+	return (false);
+}
+
+t_bool	check_dead(t_philo *philo)
+{
+	t_usize	i;
+
+	i = 0;
+	while (i < philo[0].nb_philo)
+	{
+		if (ft_time() - philo[i].t_last_eat > philo[i].t_eat)
+			return (true);
+	}
+	i++;
+	return (false);
+}
+
+t_bool	check_eat(t_philo *philo)
+{
+	t_usize	i;
+	t_u8	check;
+
+	i = 0;
+	check = 0;
+	if (philo[0].nb_eat == -1)
+		return (false);
+	while (i < philo[0].nb_philo)
+	{
+		if (philo[i].eating_count >= philo[i].nb_eat)
+			check++;
+		i++;
+	}
+	if (check == philo[0].nb_philo)
+		return (true);
+	return (false);
+}
+
+void	*ft_watch_dogs(void *ptr)
+{
+	t_philo	*philo;
+
+	philo = (t_philo *) ptr;
+	if (philo == NULL)
+		return (NULL);
+	while (true)
+	{
+		if (check_dead(philo))
+			break ;
+		if (check_eat(philo))
+			break ;
+	}
+	return (philo);
+}
+
+void	*ft_routine(void *ptr)
+{
+	t_philo	*philo;
+
+	philo = (t_philo *) ptr;
+	if (philo == NULL)
+		return (NULL);
+	while (!dead_loop(philo))
+	{
+		ft_start_eating(philo);
+		ft_sleeping(philo);
+		ft_thinking(philo);
+	}
+	return (philo);
+}
+
+t_error	ft_init_thread(t_program *prog, t_mutex *forks)
+{
+	t_thread	o_block;
+	t_usize		i;
+
+	i = 0;
+	if (pthread_create(&o_block, NULL, &ft_watch_dogs, prog->philos))
+		ft_destroy_exit("Allocation of watch_dogs failed\n", \
+			ERROR, prog, forks);
+	while (i < prog->philos[0].nb_philo)
+	{
+		if (pthread_create(&prog->philos[i].thread, NULL, &ft_routine, \
+					&prog->philos[i]))
+			ft_destroy_exit("Allocation of one philo thread failed !\n", \
+					ERROR, prog, forks);
+		i++;
+	}
+	pthread_join(o_block, NULL);
+	while (--i > 0)
+		pthread_join(prog->philos[i].thread, NULL);
+	return (NO_ERROR);
+}