void init(char* arg) {
int i;
q_init;
gl_env.n = 0;
gl_env.s = 0;
gl_env.e = 0;
gl_env.w = 0;
for(i = 0; arg[i] != '\0'; i++){
switch (arg[i]) {
case 'n':
gl_env.n = 1;
q_putCart('n');
break;
case 's':
gl_env.s = 1;
q_putCart('s');
break;
case 'e':
gl_env.e = 1;
q_putCart('e');
break;
case 'w':
gl_env.w = 1;
q_putCart('w');
break;
}
}
}
int main(int argc, char **argv)
{
pthread_t nthread;
pthread_t sthread;
pthread_t ethread;
pthread_t wthread;
char *dirs;
int i;
setvbuf(stdout, NULL, _IOLBF,0);
if (argc != 2)
{
printf("usage: %s <directions>\n",argv[0]);
return 1;
}
dirs = argv[1];
/*initialize four queues; one for each direction*/
q_init();
/*add carts to queues from command line args*/
for (i=0; dirs[i] != '\0'; ++i)
{
if (dirs[i] == 'n')
q_putCart('n');
else if (dirs[i] == 's')
q_putCart('s');
else if (dirs[i] == 'e')
q_putCart('e');
else if (dirs[i] == 'w')
q_putCart('w');
else
printf("Invalid character %c supplied, ignoring...\n",dirs[i]);
}
printf("\nStarting queues:\n");
q_print('n');
q_print('w');
q_print('s');
q_print('e');
printf("\n");
/*init monitor*/
monitor_init();
/*start threads*/
if (pthread_create(&nthread,NULL,&north,NULL))
{
printf("North thread creation failed.\n");
return -1;
}
if (pthread_create(&sthread,NULL,&south,NULL))
{
printf("South thread creation failed.\n");
return -1;
}
if (pthread_create(ðread,NULL,&east,NULL))
{
printf("East thread creation failed.\n");
return -1;
}
if (pthread_create(&wthread,NULL,&west,NULL))
{
printf("West thread creation failed.\n");
return -1;
}
/*wait until all threads exit*/
pthread_join(nthread,NULL);
pthread_join(sthread,NULL);
pthread_join(ethread,NULL);
pthread_join(wthread,NULL);
printf("\nEnding queues (should all be NULL):\n");
q_print('n');
q_print('w');
q_print('s');
q_print('e');
printf("\n");
/*free up memory and exit program*/
q_shutdown();
monitor_shutdown();
return 0;
}
int main(int argc, char *argv[]) {
char *directions;
int i;
pthread_t tid[4];
char *arg;
int rc;
/* get command line */
if (argc != 2) {
fprintf(stderr, "usage: %s <string: any length/combination of n,e,w,s>\n", argv[0]);
exit(1);
}
directions = argv[1];
/* init other modules */
q_init();
monitor_init();
pthread_barrier_init(&endBarrier, NULL, 4);
/* 1. place all carts on appropriate queue */
for (i=0; i<strlen(directions); i++)
q_putCart(directions[i]);
#if 1
q_print(Q_NORTH);
q_print(Q_SOUTH);
q_print(Q_EAST);
q_print(Q_WEST);
#endif
/* 2. create 4 threads, one for each direction */
arg = malloc(sizeof(char));
*arg = Q_NORTH;
if ((rc = pthread_create(&tid[0], NULL, moveCart, (void *)arg)) != 0)
fprintf(stderr, "thread create %c failed (%s)\n", *arg, strerror(rc)), exit(1);
arg = malloc(sizeof(char));
*arg = Q_SOUTH;
if ((rc = pthread_create(&tid[1], NULL, moveCart, (void *)arg)) != 0)
fprintf(stderr, "thread create %c failed (%s)\n", *arg, strerror(rc)), exit(1);
arg = malloc(sizeof(char));
*arg = Q_EAST;
if ((rc = pthread_create(&tid[2], NULL, moveCart, (void *)arg)) != 0)
fprintf(stderr, "thread create %c failed (%s)\n", *arg, strerror(rc)), exit(1);
arg = malloc(sizeof(char));
*arg = Q_WEST;
if ((rc = pthread_create(&tid[3], NULL, moveCart, (void *)arg)) != 0)
fprintf(stderr, "thread create %c failed (%s)\n", *arg, strerror(rc)), exit(1);
/* 3. join threads as they complete */
if ((rc = pthread_join(tid[0], NULL)) != 0)
fprintf(stderr, "thread join 0 failed (%s)\n", strerror(rc)), exit(1);
if ((rc = pthread_join(tid[1], NULL)) != 0)
fprintf(stderr, "thread join 1 failed (%s)\n", strerror(rc)), exit(1);
if ((rc = pthread_join(tid[2], NULL)) != 0)
fprintf(stderr, "thread join 2 failed (%s)\n", strerror(rc)), exit(1);
if ((rc = pthread_join(tid[3], NULL)) != 0)
fprintf(stderr, "thread join 3 failed (%s)\n", strerror(rc)), exit(1);
/* release resources */
q_shutdown();
monitor_shutdown();
pthread_barrier_destroy(&endBarrier);
return 0;
}
int main(int argc, char* argv[]){
char *carts;
int index;
pthread_t tids[4];
struct queue_info *queue_infos[4];
if(argc != 2){
fprintf(stderr, "wrong argument number");
exit(1);
}
carts = argv[1];
index = 0;
q_init();
pthread_barrier_init(&barrier, NULL, THREAD_NUM);
monitor_init();
/*
* check input string is valid
*/
if(strlen(carts) <= 0){
fprintf(stderr, "input is empty");
exit(1);
}
index = 0;
while(index < strlen(carts)){
if(isValidChar(carts[index]) == 0){
fprintf(stderr, "input direction is invalid");
exit(1);
}
q_putCart(carts[index]);
thread_index = getIndexByDir(carts[index]);
index++;
}
index = 0;
while(index < THREAD_NUM){
finishes[index] = 0;
index++;
}
/*
* 0 -> North
* 1 -> West
* 2 -> South
* 3 -> East
*/
queue_infos[0] = malloc(sizeof(struct queue_info));
queue_infos[1] = malloc(sizeof(struct queue_info));
queue_infos[2] = malloc(sizeof(struct queue_info));
queue_infos[3] = malloc(sizeof(struct queue_info));
queue_infos[0]->dir = 'n';
queue_infos[0]->thread_index = 0;
queue_infos[1]->dir = 'w';
queue_infos[1]->thread_index = 1;
queue_infos[2]->dir = 's';
queue_infos[2]->thread_index = 2;
queue_infos[3]->dir = 'e';
queue_infos[3]->thread_index = 3;
/*
* Create four threads
*/
index = 0;
while(index < 4){
if(pthread_create(&tids[index], NULL, threadFunc, queue_infos[index]) != 0)
perror("pthread create error"), exit(EXIT_FAILURE);
index++;
}
index = 0;
while(index < 4){
pthread_join(tids[index], NULL);
index++;
}
monitor_shutdown();
q_shutdown();
return 1;
}