In C is “i+=1;” atomic?

Question

In C, is i+=1; atomic?

Answer 1

Although i may not be atomic for the C language, it should be noted that is atomic on most platforms. The GNU C Library documentation states:

In practice, you can assume that int and other integer types no longer than int are atomic. You can also assume that pointer types are atomic; that is very convenient. Both of these assumptions are true on all of the machines that the GNU C library supports and on all POSIX systems we know of.