嗨很抱歉发布了一大堆代码,但我是C代码的新手,基本上我正在做大学的任务,我必须实现一个"pthread_barrier",现在我理解了障碍的概念(或者在至少我认为我这样做但是我只是不确定我应该把它放在哪里.作业说明:
"使用pthread_barrier_init和pthread_barrier_wait确保所有生产者/消费者线程同时开始生产/消费."
顺便说一下,这是作业的额外学分
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#define SIXTY_SECONDS 60000000
#define ONE_SECOND 1000000
#define RANGE 10
#define PERIOD 2
typedef struct {
int *carpark;
int capacity;
int occupied;
int nextin;
int nextout;
int cars_in;
int cars_out;
pthread_mutex_t lock;
pthread_cond_t space;
pthread_cond_t car;
pthread_barrier_t bar;
} cp_t;
/* Our producer threads will each execute this function */
static void *
producer(void *cp_in)
{
cp_t *cp;
unsigned int seed;
/* Convert what was passed in to a pointer …我开始在linux上进行pthread编程,在第一个程序中我完全搞糊涂了.以下是我正在运行的程序
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
void *print_message_function( void *ptr );
int main(){
pthread_t thread1, thread2;
char *message1 = "Thread 1";
char *message2 = "Thread 2";
int iret1, iret2;
/* Create independent threads each of which will execute function */
iret1 = pthread_create( &thread1, NULL, print_message_function, (void*) message1);
iret2 = pthread_create( &thread2, NULL, print_message_function, (void*) message2);
/* Wait till threads are complete before main continues. Unless we */
/* wait we run the risk of executing an exit which …给出以下代码
#include <pthread.h>
void *pt_routine(void *arg)
{
pthread_t *tid;
tid = (pthread_t *) arg;
/* do something with tid , say printf?*/
/*
printf("The thread ID is %lu\n", *tid);
*/
return NULL;
}
int main(int argc, char **argv)
{
int rc;
pthread_t tid;
rc = pthread_create(&tid, NULL, pt_routine, &tid);
if (rc)
{
return 1;
}
printf("The new thread is %lu\n", tid);
pthread_join(tid, NULL);
return 0;
}
例行公事能永远正确吗tid？
当然，我可以使用 pthread 来获取自身 ID，但我只是想知道例程何时运行。