2022-09-09 18:30:33 +00:00
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/*-*- 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 2022 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/errno.h"
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#include "libc/thread/posixthread.internal.h"
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2022-09-10 09:56:25 +00:00
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#include "libc/thread/thread2.h"
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2022-09-09 18:30:33 +00:00
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/**
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* Changes scheduling of thread, e.g.
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*
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* struct sched_param p = {sched_get_priority_min(SCHED_OTHER)};
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* pthread_setschedparam(thread, SCHED_OTHER, &p);
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*
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* @param policy may be one of:
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* - `SCHED_OTHER` the default policy
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* - `SCHED_FIFO` for real-time scheduling (usually needs root)
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* - `SCHED_RR` for round-robin scheduling (usually needs root)
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* - `SCHED_IDLE` for lowest effort (Linux and FreeBSD only)
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* - `SCHED_BATCH` for "batch" style execution of processes if
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* supported (Linux), otherwise it's treated as `SCHED_OTHER`
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* @raise ENOSYS on XNU, Windows, OpenBSD
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* @raise EPERM if not authorized to use scheduler in question (e.g.
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* trying to use a real-time scheduler as non-root on Linux) or
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* possibly because pledge() was used and isn't allowing this
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* @see sched_get_priority_min()
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* @see sched_get_priority_max()
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* @see sched_setscheduler()
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*/
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int pthread_setschedparam(pthread_t thread, int policy,
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const struct sched_param *param) {
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struct PosixThread *pt = (struct PosixThread *)thread;
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if (!param) return EINVAL;
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pt->attr.schedpolicy = policy;
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pt->attr.schedparam = param->sched_priority;
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return _pthread_reschedule(pt);
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}
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