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Rewrite recursive mutex code

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Justine Tunney 2022-09-10 09:14:40 -07:00
parent bae7367774
commit cfcf5918bc
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27 changed files with 164 additions and 257 deletions
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libc/thread/pthread_attr_setschedpolicy.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/thread/thread.h"
/**
* Sets thread scheduler policy attribute, e.g.
*
* pthread_t id;
* pthread_attr_t attr;
* pthread_attr_init(&attr);
* struct sched_param pri = {sched_get_priority_min(SCHED_OTHER)};
* pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
* pthread_attr_setschedpolicy(&attr, SCHED_OTHER);
* pthread_attr_setschedparam(&attr, &pri);
* pthread_create(&id, &attr, func, 0);
* pthread_attr_destroy(&attr);
* pthread_join(id, 0);
*
* @param policy may be one of:
* - `SCHED_OTHER` the default policy
* - `SCHED_FIFO` for real-time scheduling (usually needs root)
* - `SCHED_RR` for round-robin scheduling (usually needs root)
* - `SCHED_IDLE` for lowest effort (Linux and FreeBSD only)
* - `SCHED_BATCH` for "batch" style execution of processes if
* supported (Linux), otherwise it's treated as `SCHED_OTHER`
* @see sched_setscheduler()
*/
int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy) {
attr->schedpolicy = policy;
return 0;
}