[英]How do I add all the files in the current directory to an array from a thread in c?
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
pthread_mutex_t mut1 = PTHREAD_MUTEX_INITIALIZER,
mut2 = PTHREAD_MUTEX_INITIALIZER,
mut3 = PTHREAD_MUTEX_INITIALIZER,
mut4 = PTHREAD_MUTEX_INITIALIZER;
char *buff1, *buff2, *buff3, *buff4;
void *stage1(void *arg)
{
DIR *dir = (DIR*)arg
struct dirent *ent;
if (dir != NULL)
{
while ((ent = readdir (dir)) != NULL)
{
printf ("%s\n", ent->d_name);
}
closedir (dir);
} else
{
printf("FAILURE");
}
}
int main(int argc, char *argv[])
{
if(argc != 6)
{
printf("Usage: %s <buffsize> <filesize> <uid> <gid> <string>\n", argv[0]);
return(-1);
}
int buffsize, filesize, uid, gid;
sscanf(argv[1],"%d",&buffsize);
sscanf(argv[2],"%d",&filesize);
sscanf(argv[3],"%d",&uid);
sscanf(argv[4],"%d",&gid);
char *string = argv[5];
buff1 = malloc(buffsize * sizeof(*buff1));
buff2 = malloc(buffsize * sizeof(*buff2));
buff3 = malloc(buffsize * sizeof(*buff3));
buff4 = malloc(buffsize * sizeof(*buff4));
pthread_t th1,th2,th3,th4,th5;
DIR *dir = opendir(".");
pthread_create(&th1,NULL,stage1,dir);
if(filesize != -1) pthread_create(&th2,NULL,stage2,buff2);
return 0;
}
这似乎在调试器中工作正常,但是当我运行它时,终端上没有任何显示。 我将用以下方式替换stage1方法中的printf行:
buff1[i] = ent;
i++;
我将添加更多代码以确保我始终指向正确的位置,但这就是我现在正在使用的内容。 我希望它可以打印文件,所以我知道它可以工作。
在工作线程有时间做任何事情之前,您的主线程正在退出,从而结束了该过程。 在main()
的末尾添加对pthread_join()
的调用:
pthread_t th1,th2,th3,th4,th5;
DIR *dir = opendir(".");
pthread_create(&th1, NULL, stage1, dir);
if (filesize != -1)
pthread_create(&th2, NULL, stage2, buff2);
pthread_join(th1, NULL);
if (filesize != -1)
pthread_join(th2, NULL);
return 0;
}
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