int
main(int argc, char **argv)
{
pthread_t tid_produce, tid_consume;
if (argc != 2)
err_quit("usage: mycat2 <pathname>");
fd = Open(argv[1], O_RDONLY);
/* 4initialize three semaphores */
Sem_init(&shared.mutex, 0, 1);
Sem_init(&shared.nempty, 0, NBUFF);
Sem_init(&shared.nstored, 0, 0);
/* 4one producer thread, one consumer thread */
Set_concurrency(2);
Pthread_create(&tid_produce, NULL, produce, NULL); /* reader thread */
Pthread_create(&tid_consume, NULL, consume, NULL); /* writer thread */
Pthread_join(tid_produce, NULL);
Pthread_join(tid_consume, NULL);
Sem_destroy(&shared.mutex);
Sem_destroy(&shared.nempty);
Sem_destroy(&shared.nstored);
exit(0);
}
int main(int argc,char **argv)
{
pthread_t produce_tid,consume_tid;
if(argc!=2)
err_quit("usage: mycat <pathname> ");
if((fd=open(argv[1],O_RDONLY))==-1)
err_sys("open error");
Sem_init(&shared.mutex,0,1);
Sem_init(&shared.nempty,0,NBUFF);
Sem_init(&shared.nstored,0,0);
Set_concurrency(2);
Pthread_create(&produce_tid,NULL,produce,NULL);
Pthread_create(&consume_tid,NULL,consume,NULL);
Pthread_join(produce_tid,NULL);
Pthread_join(consume_tid,NULL);
Sem_destroy(&shared.mutex);
Sem_destroy(&shared.nempty);
Sem_destroy(&shared.nstored);
exit(0);
}
int main(int argc, char **argv)
{
pthread_t tid_produce, tid_consume;
if (argc != 2)
err_quit("Usage: buffer <pathname>");
fd = Open(argv[1], O_RDONLY);
Sem_init(&shared.mutex, 0, 1);
Sem_init(&shared.nempty, 0, NBUFF);
Sem_init(&shared.nstored, 0, 0);
Pthread_setconcurrency(2);
Pthread_create(&tid_produce, NULL, produce, NULL);
Pthread_create(&tid_consume, NULL, consume, NULL);
Pthread_join(tid_produce, NULL);
Pthread_join(tid_consume, NULL);
Sem_destroy(&shared.mutex);
Sem_destroy(&shared.nempty);
Sem_destroy(&shared.nstored);
exit(0);
}
void log_close(log_t *log)
{
Sem_wait(&log->sem);
Sem_destroy(&log->sem);
Close(log->fd);
free(log);
return;
} /* end log_close */
/* include main */
int
main(int argc, char **argv)
{
int i, prodcount[MAXNTHREADS], conscount[MAXNTHREADS];
pthread_t tid_produce[MAXNTHREADS], tid_consume[MAXNTHREADS];
if (argc != 4)
err_quit("usage: prodcons4 <#items> <#producers> <#consumers>");
nitems = atoi(argv[1]);
nproducers = min(atoi(argv[2]), MAXNTHREADS);
nconsumers = min(atoi(argv[3]), MAXNTHREADS);
/* 4initialize three semaphores */
Sem_init(&shared.mutex, 0, 1);
Sem_init(&shared.nempty, 0, NBUFF);
Sem_init(&shared.nstored, 0, 0);
/* 4create all producers and all consumers */
Set_concurrency(nproducers + nconsumers);
for (i = 0; i < nproducers; i++) {
prodcount[i] = 0;
Pthread_create(&tid_produce[i], NULL, produce, &prodcount[i]);
}
for (i = 0; i < nconsumers; i++) {
conscount[i] = 0;
Pthread_create(&tid_consume[i], NULL, consume, &conscount[i]);
}
/* 4wait for all producers and all consumers */
for (i = 0; i < nproducers; i++) {
Pthread_join(tid_produce[i], NULL);
printf("producer count[%d] = %d\n", i, prodcount[i]);
}
for (i = 0; i < nconsumers; i++) {
Pthread_join(tid_consume[i], NULL);
printf("consumer count[%d] = %d\n", i, conscount[i]);
}
Sem_destroy(&shared.mutex);
Sem_destroy(&shared.nempty);
Sem_destroy(&shared.nstored);
exit(0);
}
