call gettid witin glibc

Question

I am working in glibc and I need to get the id of the current thread. For this i use syscall(SYS_gettid); Issue is, i am forced to include bits/syscall.h

Answer 1

gettid() is a system call. As for as I know there is no glibc wrapper for gettid. You need to invoke gettid() using syscall(). The following code works for me.

#include <sys/syscall.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

int main()
{
    long tid;

    tid = syscall(SYS_gettid);
    printf("%ld\n", tid);
    return EXIT_SUCCESS;
}