Is this a real spinlock?

[straightdave]

Should the Goroutine keeps doing something before trying to get lock periodically when it fails to get the lock, rather than giving up the processor time by calling `runtime.Gosched()?

[OneOfOne]

That haven't been updated in a long time, however when I wrote it, without the Gosched, the whole program would freeze.

Also most (all?) spinlock implementation does something similar.

from https://locklessinc.com/articles/locks/:

static void spin_lock(spinlock *lock)
{
	while (1)
	{
		if (!xchg_32(lock, EBUSY)) return;
	
		while (*lock) cpu_relax(); <<<<<
	}
}