自宅に Linux がないため、次のプログラムをデバッグできません。プログラムを実行できませんが、ラボ セッションでプログラムをコンパイルしているときに、2 つのエラーが発生しました。誰でも私を助けることができますか？誰かがデバッグ後にこのプログラムを実行できる場合は、出力を投稿してください。
コードは次のとおりです。
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <semaphore.h>
#define BUFFER_SIZE 10
sem_t empty;
sem_t full;
pthread_mutex_t mutex;
int buffer[BUFFER_SIZE];
pthread_t ptid,ctid;
pthread_attr_t attr;
void *producer(void *param);
void *consumer(void *param);
int counter;
int main()
{
init();
pthread_create(&ptid, &attr, producer, NULL);
pthread_create(&ctid, &attr, consumer, NULL);
pthread_join(ptid,NULL);
pthread_join(ctid,NULL);
return 0;
}
void init()
{
pthread_mutex_init(&mutex, NULL);
pthread_attr_init(&attr);
sem_init(&full, 0, 0);
sem_init(&empty, 0, BUFFER_SIZE);
counter = 0;
for(int j=0;j<BUFFER_SIZE;j++)
{ buffer[j] = 0;}
}
void *producer(void *param)
{
int item;
while(1)
{
item=item+1;
sem_wait(&empty);
pthread_mutex_lock(&mutex);
if(insert_item(item))
{
perror("Producer error.");
return 1;
}
else
{
printf("Producer produced %d\n", item);
}
pthread_mutex_unlock(&mutex);
sem_post(&full);
}
}
void *consumer(void *param)
{
int item;
while(1)
{
sleep(5);
sem_wait(&full);
pthread_mutex_lock(&mutex);
if(remove_item(item))
{
perror( "Consumer error.");
}
else
{
printf("Consumer consumed %d\n", item);
}
pthread_mutex_unlock(&mutex);
sem_post(&empty);
}
}
int insert_item(int item)
{
if(counter < BUFFER_SIZE)
{
buffer[counter] = item;
counter++;
return 0;
}
else
return -1;
}
int remove_item(int item)
{
if(counter > 0)
{
item = buffer[(counter-1)];
counter--;
return ;
}
else
return -1;
}
変更と修正を行った後、次の出力が得られますが、これは目的のものではありません........
[root@localhost sree58]# gcc producerconsumer.c -lpthread -lrt
producerconsumer.c: In function ‘producer’:
producerconsumer.c:54: warning: return makes pointer from integer without a cast
[root@localhost sree58]# ./a.out
Producer produced 1804289383
Producer produced 846930886
Producer produced 1681692777
Producer produced 1714636915
Producer produced 1957747793
Producer produced 424238335
Producer produced 719885386
Producer produced 1649760492
Producer produced 596516649
Producer produced 1189641421
Consumer error.: Success
Producer produced 1025202362
Consumer error.: Illegal seek
Producer produced 1350490027
Consumer error.: Illegal seek
Producer produced 783368690
Consumer error.: Illegal seek
Producer produced 1102520059
Consumer error.: Illegal seek
Producer produced 2044897763
Consumer error.: Illegal seek
Producer produced 1967513926
Consumer error.: Illegal seek
Producer produced 1365180540
Consumer error.: Illegal seek
Producer produced 1540383426
Consumer error.: Illegal seek
Producer produced 304089172
Consumer error.: Illegal seek
Producer produced 1303455736
Consumer error.: Illegal seek
Producer produced 35005211
Consumer error.: Illegal seek
Producer produced 521595368
Consumer error.: Illegal seek
Producer produced 294702567
Consumer error.: Illegal seek
Producer produced 1726956429
誰か私を案内してください......