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mach: Fix bogus negative return
One can be very unlucky to call time_now first just before a second switch, and mach_msg sleep just a bit more enough for the second time_now call to count one second too many (or even more if scheduling is really unlucky). So we have to protect against returning a bogus negative value in such case.
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@ -43,6 +43,9 @@ __sleep (unsigned int seconds)
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after = time_now ();
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__mach_port_destroy (__mach_task_self (), recv);
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if (after - before > seconds)
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return 0;
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return seconds - (after - before);
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}
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weak_alias (__sleep, sleep)
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