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The `clock()` function reads the current second and microsecond value of
the system clock, optionally using the monotonic clock instead of the
default realtime one.
-- Testcase --
{%
let t1 = clock();
let t3 = clock(true);
sleep(250);
let t2 = clock();
let t4 = clock(true);
let delta1 = (t2[0] - t1[0]) * 1000000000 + (t2[1] - t1[1]);
let delta2 = (t4[0] - t3[0]) * 1000000000 + (t4[1] - t3[1]);
assert(delta1 >= 0, "Realtime clock went backwards!");
assert(delta2 >= 0, "Monotonic clock went backwards!");
printf("%.J\n", [
(delta1 >= 240000000 && delta1 <= 260000000) ? true : "unexpected delta: " + delta1,
(delta2 >= 240000000 && delta2 <= 260000000) ? true : "unexpected delta: " + delta2
]);
%}
-- End --
-- Expect stdout --
[
true,
true
]
-- End --
|
