17 lines
441 B
C
17 lines
441 B
C
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#include <unistd.h>
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#include <sys/resource.h>
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#include <limits.h>
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#include "syscall.h"
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int nice(int inc)
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{
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int prio = inc;
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// Only query old priority if it can affect the result.
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// This also avoids issues with integer overflow.
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if (inc > -2*NZERO && inc < 2*NZERO)
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prio += getpriority(PRIO_PROCESS, 0);
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if (prio > NZERO-1) prio = NZERO-1;
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if (prio < -NZERO) prio = -NZERO;
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return setpriority(PRIO_PROCESS, 0, prio) ? -1 : prio;
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}
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