为什么在这种情况下，呼叫过程和新线程的PID相同？
//compile and link with -pthread
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
void *pthread_function( void *ptr ){
printf("Hello from the new thread, my pid is %d\n", getpid());
}
int main() {
printf("Hello from the calling process, my pid is %d\n", getpid());
pthread_t thread;
int ret;
ret = pthread_create( &thread, NULL, pthread_function, NULL);
if (ret){
printf("ERROR; return code from pthread_create() is %d\n", ret);
exit(-1);
}
/* Last thing that main() should do */
pthread_exit(NULL);
}
当我运行此程序时，我得到了这个结果
呼叫过程中的你好，我的pid是4445
新线程中的你好，我的pid是4445
为什么在这种情况下，呼叫过程的PID和新线程相同？
//compile and link with -pthread
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
void *pthread_function( void *ptr ){
printf("Hello from the new thread, my pid is %d\n", getpid());
}
int main() {
printf("Hello from the calling process, my pid is %d\n", getpid());
pthread_t thread;
int ret;
ret = pthread_create( &thread, NULL, pthread_function, NULL);
if (ret){
printf("ERROR; return code from pthread_create() is %d\n", ret);
exit(-1);
}
/* Last thing that main() should do */
pthread_exit(NULL);
}
When I run this program, I got this result
Hello from the calling process, my pid is 4445
Hello from the new thread, my pid is 4445
Why in this case the pid of the calling process and the new thread are the same?
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