尝试通过执行 gcc -o consumer.c -lpthread -lm 在 Linux 中编译我的代码,但我收到有关未声明的内容的编译错误,据我所知,已声明。大多数未声明的似乎与缓冲区有关,这是我第一个使用缓冲区的程序。这是错误(已编辑以反射(reflect)更改)
typedef char buffer_item buffer[BUFFER_SIZE]; // asm or __attribute__ before "buffer"
both of these(expected ')' before 'item'
int insert_item(buffer_item item)
int insert_item(buffer_item item)
int remove_item(buffer_item *item) //expected ')' before * token
这是修改后的完整代码
#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>
#include <semaphore.h>
#define RAND_DIVISOR 100000000
#define TRUE 1
#define BUFFER_SIZE 1000
pthread_mutex_t mutex; //mutex lock
sem_t full, empty; //semaphores
typedef char buffer_item buffer[BUFFER_SIZE];
int counter; //buffer counter
pthread_t tid1, tid2; //Thread ID
pthread_attr_t attr; // thread attributes
void *producer(void *param); // producer thread
void *consumer(void *param); //consumer thread
void initializeData() {
pthread_mutex_init(&mutex, NULL); //Create mutex lock
sem_init(&full, 0, 0); // Create the full semaphore and initialize to 0
sem_init(&empty, 0, BUFFER_SIZE); // Create the empty semaphore and initialize to BUFFER_SIZE
pthread_attr_init(&attr); //default attributes
counter = 0;
}
// Producer Thread
int insert_item(buffer_item item)
void *producer(void *param) {
while(TRUE) {
// random sleep time
int rNum = rand() / RAND_DIVISOR;
sleep(rNum);
int item = rand()%100; // item is a random number between 1-100
sem_wait(&empty); //get empty lock
pthread_mutex_lock(&mutex); //get mutex lock
if(insert_item(item)) {
fprintf(stderr, " Producer report error condition\n");
}
else {
printf("producer produced %d\n", item);
}
pthread_mutex_unlock(&mutex); //release mutex lock
sem_post(&full); //signal full
}
}
// Consumer Thread
void *consumer(void *param) {
while(TRUE) {
int rNum = rand() / RAND_DIVISOR; // sleep for a random period of time
sleep(rNum);
int item = rand()%100; // item is a random number between 1-100
sem_wait(&full);// aquire the full lock */
pthread_mutex_lock(&mutex);// aquire the mutex lock
if(remove_item(&item)) {
fprintf(stderr, "Consumer report error condition\n");
}
else {
printf("consumer consumed %d\n", item);
}
pthread_mutex_unlock(&mutex);// release mutex lock
sem_post(&empty); //signal empty
}
}
int insert_item(buffer_item item)
{
// add item as long as buffer isn't full
if(counter < BUFFER_SIZE) {
buffer[counter] = item;
counter++;
return 0;
}
else {
return -1; //buffer full error
}
}
// Remove an item from the buffer
int remove_item(buffer_item *item)// remove item and decrement counter when buffer not empty
{
if(counter > 0) {
*item = buffer[(counter-1)];
counter--;
return 0;
}
else { //buffer empty error
}
return -1;
}
int main(int argc, char *argv[]) {
int i; //loop counter
if(argc != 4) {
fprintf(stderr, "USAGE:./main.out <INT> <INT> <INT>\n");
}
int mainSleepTime = atoi(argv[1]); // sleep time in seconds
int numProd = atoi(argv[2]); // producer threads
int numCons = atoi(argv[3]); // consumer threads
initializeData(); //initialize app
for(i = 0; i < numProd; i++) {
pthread_create(&tid1,&attr,producer,NULL);
}
for(i = 0; i < numCons; i++) {
pthread_create(&tid2,&attr,consumer,NULL);
}
// sleep in milliseconds
//sleep(mainSleepTime);
pthread_join(tid1, NULL);
pthread_join(tid2, NULL);
printf("Program Exiting\n");
exit(0);
}
编辑:最新代码和错误截图http://tinypic.com/r/xptzww/9
#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>
#include <semaphore.h>
#define RAND_DIVISOR 100000000
#define TRUE 1
#define BUFFER_SIZE 1000
pthread_mutex_t mutex; //mutex lock
sem_t full, empty; //semaphores
typedef char buffer_item;
int counter; //buffer counter
pthread_t tid1, tid2; //Thread ID
pthread_attr_t attr; // thread attributes
void *producer(void *param); // producer thread
void *consumer(void *param); //consumer thread
void initializeData() {
pthread_mutex_init(&mutex, NULL); //Create mutex lock
sem_init(&full, 0, 0); // Create the full semaphore and initialize to 0
sem_init(&empty, 0, BUFFER_SIZE); // Create the empty semaphore and initialize to BUFFER_SIZE
pthread_attr_init(&attr); //default attributes
counter = 0;
}
// Producer Thread
int insert_item(buffer_item item)
void *producer(void *param) {
while(TRUE) {
// random sleep time
int rNum = rand() / RAND_DIVISOR;
sleep(rNum);
int item = rand()%100; // item is a random number between 1-100
sem_wait(&empty); //get empty lock
pthread_mutex_lock(&mutex); //get mutex lock
if(insert_item(item)) {
fprintf(stderr, " Producer report error condition\n");
}
else {
printf("producer produced %d\n", item);
}
pthread_mutex_unlock(&mutex); //release mutex lock
sem_post(&full); //signal full
}
}
// Consumer Thread
void *consumer(void *param) {
while(TRUE) {
int rNum = rand() / RAND_DIVISOR; // sleep for a random period of time
sleep(rNum);
int item = rand()%100; // item is a random number between 1-100
sem_wait(&full);// aquire the full lock */
pthread_mutex_lock(&mutex);// aquire the mutex lock
if(remove_item(&item)) {
fprintf(stderr, "Consumer report error condition\n");
}
else {
printf("consumer consumed %d\n", item);
}
pthread_mutex_unlock(&mutex);// release mutex lock
sem_post(&empty); //signal empty
}
}
int insert_item(buffer_item item){// add item as long as buffer isn't full
if(counter < BUFFER_SIZE) {
buffer[counter] = item;
counter++;
return 0;
}
else {
return -1; //buffer full error
}
}
// Remove an item from the buffer
int remove_item(buffer_item *item)// remove item and decrement counter when buffer not empty
{
if(counter > 0) {
*item = buffer[(counter-1)];
counter--;
return 0;
}
else { //buffer empty error
}
return -1;
}
int main(int argc, char *argv[]) {
int i; //loop counter
if(argc != 4) {
fprintf(stderr, "USAGE:./main.out <INT> <INT> <INT>\n");
}
int mainSleepTime = atoi(argv[1]); // sleep time in seconds
int numProd = atoi(argv[2]); // producer threads
int numCons = atoi(argv[3]); // consumer threads
initializeData(); //initialize app
for(i = 0; i < numProd; i++) {
pthread_create(&tid1,&attr,producer,NULL);
}
for(i = 0; i < numCons; i++) {
pthread_create(&tid2,&attr,consumer,NULL);
}
// sleep in milliseconds
//sleep(mainSleepTime);
pthread_join(tid1, NULL);
pthread_join(tid2, NULL);
printf("Program Exiting\n");
exit(0);
}
最佳答案
您已声明但未定义 BUFFER_SIZE。 相反
char BUFFER_SIZE;
尝试
char BUFFER_SIZE = some_value;
其中 some_value 应该是 1-255 之间的任何值
线路:
char buffer_item buffer[BUFFER_SIZE];
应该是:
char buffer_item[BUFFER_SIZE];
关于消费者生产者代码未声明的错误linux调试,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33599060/