101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
#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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** fork1 = &(philo->m_fork);
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** fork2 = &(philo->m_fork);
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** if (philo->global->t_start.ts == 0)
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** if (philo->p_nbr < philo->params->n_phi / 2)
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** if (philo->p_nbr % 2 == 0)
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** fork1 = &(philo->next->m_fork);
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** else
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** fork2 = &(philo->next->m_fork);
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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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if (philo->p_nbr % 2 == 0)
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usleep(10 * 1000);
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fork1 = &(philo->m_fork);
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fork2 = &(philo->next->m_fork);
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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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}
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return (NULL);
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}
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/*
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==22761== Thread #3: lock order "0x54542E8 before 0x54541F8" violated
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==22761==
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==22761== Observed (incorrect) order is: acquisition of lock at 0x54541F8
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==22761== at 0x4C3603C: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
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==22761== by 0x4011BC: eat (exec.c:27)
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==22761== by 0x401119: philo_exec (exec.c:72)
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==22761== by 0x4C38C26: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
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==22761== by 0x4E4B6DA: start_thread (pthread_create.c:463)
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==22761== by 0x518471E: clone (clone.S:95)
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==22761==
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==22761== followed by a later acquisition of lock at 0x54542E8
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==22761== at 0x4C3603C: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
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==22761== by 0x401226: eat (exec.c:32)
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==22761== by 0x401119: philo_exec (exec.c:72)
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==22761== by 0x4C38C26: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
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==22761== by 0x4E4B6DA: start_thread (pthread_create.c:463)
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==22761== by 0x518471E: clone (clone.S:95)
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*/
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