53 lines
2.6 KiB
C
53 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/safemacros.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/kntprioritycombos.internal.h"
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#include "libc/nt/process.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/thread.h"
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static textwindows struct NtPriorityCombo findntprio(int nice) {
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size_t l, r, m;
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l = 0;
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r = kNtPriorityCombosLen;
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while (l < r) {
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m = (l + r) >> 1;
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if (kNtPriorityCombos[m].nice > nice) {
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r = m;
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} else {
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l = m + 1;
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}
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}
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return kNtPriorityCombos[max(0, l - 1)];
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}
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textwindows int setpriority$nt(int nice) {
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uint32_t tier;
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struct NtPriorityCombo p;
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p = findntprio(nice);
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tier = 1 << (p.lg2tier - 1);
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if (SetPriorityClass(GetCurrentProcess(), tier) &&
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SetThreadPriority(GetCurrentThread(), p.wut)) {
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return p.nice;
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} else {
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return __winerr();
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}
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}
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