92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* exec.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: hulamy <hulamy@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/01/31 10:23:55 by hulamy #+# #+# */
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/* Updated: 2022/01/31 19:31:54 by hulamy ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "philo.h"
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static void action_delay(t_philo *philo, int action_time)
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{
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struct timeval stime;
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int death_time;
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gettimeofday(&stime, NULL);
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death_time = philo->params->t_die - diff_time(philo, &stime);
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if (death_time > action_time)
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usleep(action_time * 1000);
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else if (death_time > 0)
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usleep(philo->params->t_die * 1000);
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}
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static int ret_err_unlock(t_mtx *fork1, t_mtx *fork2)
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{
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if (fork2)
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pthread_mutex_unlock(fork2);
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if (fork1)
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pthread_mutex_unlock(fork1);
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return (1);
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}
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static int eat(t_philo *philo, t_mtx *fork1, t_mtx *fork2)
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{
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pthread_mutex_lock(fork1);
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if (print_message(philo, WHITE, "has taken a fork"))
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return (ret_err_unlock(fork1, NULL));
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if (fork1 == fork2)
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return (ret_err_unlock(fork1, NULL));
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pthread_mutex_lock(fork2);
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if (print_message(philo, WHITE, "has taken a fork"))
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return (ret_err_unlock(fork1, fork2));
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update_time(philo);
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if (print_message(philo, B_YELLOW, "is eating"))
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return (ret_err_unlock(fork1, fork2));
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action_delay(philo, philo->params->t_eat);
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pthread_mutex_lock(&(philo->m_eat));
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philo->eat_count++;
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pthread_mutex_unlock(&(philo->m_eat));
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pthread_mutex_unlock(fork2);
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pthread_mutex_unlock(fork1);
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return (0);
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}
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/*
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** offset launch :
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if (philo->p_nbr % 2 == 0)
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usleep(10 * 1000);
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*/
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void *philo_exec(void *arg)
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{
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t_philo *philo;
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t_mtx *fork1;
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t_mtx *fork2;
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philo = (t_philo *)arg;
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init_time(philo);
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fork1 = &(philo->m_fork);
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fork2 = &(philo->next->m_fork);
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if (philo->p_nbr % 2 == 0)
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{
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fork1 = &(philo->next->m_fork);
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fork2 = &(philo->m_fork);
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}
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while (1)
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{
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if (eat(philo, fork1, fork2) != 0)
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break ;
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if (print_message(philo, B_BLUE, "is sleeping"))
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break ;
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action_delay(philo, philo->params->t_slp);
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if (print_message(philo, B_GREEN, "is thinking"))
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break ;
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usleep(1 * 1000);
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}
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return (NULL);
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}
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