2
#include <pthread.h>
#include <stdio.h>
void* printHello (void* threadId)
{
pthread_t *my_tid = (pthread_t *)threadId;
printf ("\nIn `printHello()`: thread id %ld", (long)*my_tid);
pthread_exit (NULL);
}
int main()
{
pthread_t arrayOfThreadId [5];
int returnValue;
unsigned int iterate;
for (iterate = 0; iterate < 5; iterate++)
{
if (returnValue = pthread_create (&arrayOfThreadId [iterate],
NULL,
printHello,
(void*) &arrayOfThreadId [iterate]) != 0)
{
printf ("\nerror: pthread_create failed with error number %d", returnValue);
}
else
{
printf ("\nIn `main()`: creating thread %ld", arrayOfThreadId [iterate]);
}
}
printf ("\nBefore `return 0;` in `main()`");
pthread_exit (NULL);
return 0;
}
出力:スレッドID(メインで異なる)とするstart_routine() - のPthread
In
`main()`: creating thread 139683073914640
In `main()`: creating thread 139683065521936
In `main()`: creating thread 139683057129232
In `main()`: creating thread 139683048736528
In `main()`: creating thread 139683040343824
Before `return 0;` in `main()`
In `printHello()`: thread id 140735115959408
In `printHello()`: thread id 4195680
In `printHello()`: thread id 0
In `printHello()`: thread id 0
In `printHello()`: thread id 139683073914640
はなぜthreadIDsが異なるのですか?
ここにいくつか不明点があります。私は誤って間違ってしまったようです。
'pthread_t * my_tid = threadId;'の結果は 'error: 'void *'から 'pthread_t *'への無効な変換です –
答えを訂正するには、' pthread_t * my_tid =(pthread_t *)threadId; ' –
とにかく、問題は依然として続きます。 –