shithub: drawcpu

ref: f6da1ab12d14fe4db7a76f390d6dfc85de660f1c
dir: /win32-386/cas.c/

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#include "u.h"
#include "libc.h"
#include <windows.h>

int
cas(int *x, int old, int new)
{
	return InterlockedCompareExchange((volatile LONG *)x, new, old) == old;
}