Add more POSIX threads APIs

This commit is contained in:
Justine Tunney 2022-09-09 11:30:33 -07:00
parent 1729a8259c
commit c3208eb9d5
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GPG key ID: BE714B4575D6E328
32 changed files with 592 additions and 87 deletions

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@ -1,5 +1,6 @@
#ifndef COSMOPOLITAN_LIBC_THREAD_POSIXTHREAD_INTERNAL_H_
#define COSMOPOLITAN_LIBC_THREAD_POSIXTHREAD_INTERNAL_H_
#include "libc/calls/struct/sched_param.h"
#include "libc/intrin/pthread.h"
#include "libc/runtime/runtime.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
@ -68,9 +69,11 @@ struct PosixThread {
void _pthread_free(struct PosixThread *) hidden;
void _pthread_wait(struct PosixThread *) hidden;
int _pthread_reschedule(struct PosixThread *) hidden;
void _pthread_zombies_add(struct PosixThread *) hidden;
void _pthread_zombies_decimate(void) hidden;
void _pthread_zombies_harvest(void) hidden;
int _pthread_setschedparam_freebsd(int, int, const struct sched_param *);
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */

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@ -19,7 +19,6 @@
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/calls/struct/timespec.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/futex.internal.h"
@ -77,11 +76,7 @@ int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
rel = _timespec_sub(*abstime, now);
tsp = &rel;
}
if (IsLinux() || IsOpenbsd()) {
_futex_wait(&cond->seq, seq, cond->pshared, tsp);
} else {
sched_yield();
}
_futex_wait(&cond->seq, seq, cond->pshared, tsp);
} while (seq == atomic_load_explicit(&cond->seq, memory_order_relaxed));
atomic_fetch_sub(&cond->waits, 1);

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@ -18,6 +18,7 @@
*/
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/calls/sched-sysv.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
@ -37,6 +38,7 @@
#include "libc/sysv/consts/clone.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/errfuns.h"
#include "libc/thread/internal.h"
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/spawn.h"
@ -62,6 +64,9 @@ void _pthread_free(struct PosixThread *pt) {
static int PosixThread(void *arg, int tid) {
struct PosixThread *pt = arg;
enum PosixThreadStatus status;
if (pt->attr.inheritsched == PTHREAD_EXPLICIT_SCHED) {
_pthread_reschedule(pt);
}
if (!setjmp(pt->exiter)) {
((cthread_t)__get_tls())->pthread = (pthread_t)pt;
pt->rc = pt->start_routine(pt->arg);

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@ -0,0 +1,46 @@
/*-*- 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/calls/struct/cpuset.h"
#include "libc/errno.h"
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/thread.h"
/**
* Gets CPU affinity for thread.
*
* While Windows allows us to change the thread affinity mask, it's only
* possible to read the process affinity mask. Therefore this function
* won't reflect the changes made by psched_setaffinity_np() on Windows.
*
* @param bitsetsize is byte length of bitset, which should be 128
* @return 0 on success, or errno on error
* @raise ENOSYS if not Linux or Windows
*/
int pthread_getaffinity_np(pthread_t thread, size_t bitsetsize,
cpu_set_t *bitset) {
int rc, e = errno;
struct PosixThread *pt = (struct PosixThread *)thread;
if (!sched_getaffinity(pt->tid, bitsetsize, bitset)) {
return 0;
} else {
rc = errno;
errno = e;
return rc;
}
}

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@ -0,0 +1,31 @@
/*-*- 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/intrin/pthread2.h"
#include "libc/thread/posixthread.internal.h"
/**
* Gets most recently set scheduling of thread.
*/
int pthread_getschedparam(pthread_t thread, int *policy,
struct sched_param *param) {
struct PosixThread *pt = (struct PosixThread *)thread;
*policy = pt->attr.schedpolicy;
*param = (struct sched_param){pt->attr.schedparam};
return 0;
}

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@ -0,0 +1,42 @@
/*-*- 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/calls/sched-sysv.internal.h"
#include "libc/calls/struct/sched_param.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/sysv/errfuns.h"
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/thread.h"
int _pthread_reschedule(struct PosixThread *pt) {
int rc, e = errno;
struct sched_param param = {pt->attr.schedparam};
if (IsNetbsd()) {
rc = sys_sched_setparam_netbsd(0, pt->tid, pt->attr.schedpolicy, &param);
} else if (IsLinux()) {
rc = sys_sched_setscheduler(pt->tid, pt->attr.schedpolicy, &param);
} else if (IsFreebsd()) {
rc = _pthread_setschedparam_freebsd(pt->tid, pt->attr.schedpolicy, &param);
} else {
rc = enosys();
}
rc = rc != -1 ? 0 : errno;
errno = e;
return rc;
}

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@ -0,0 +1,42 @@
/*-*- 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/calls/struct/cpuset.h"
#include "libc/errno.h"
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/thread.h"
/**
* Asks kernel to only schedule thread on particular CPUs.
*
* @param bitsetsize is byte length of bitset, which should be 128
* @return 0 on success, or errno on error
* @raise ENOSYS if not Linux or Windows
*/
int pthread_setaffinity_np(pthread_t thread, size_t bitsetsize,
const cpu_set_t *bitset) {
int rc, e = errno;
struct PosixThread *pt = (struct PosixThread *)thread;
if (!sched_setaffinity(pt->tid, bitsetsize, bitset)) {
return 0;
} else {
rc = errno;
errno = e;
return rc;
}
}

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@ -0,0 +1,51 @@
/*-*- 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/errno.h"
#include "libc/intrin/pthread2.h"
#include "libc/thread/posixthread.internal.h"
/**
* Changes scheduling of thread, e.g.
*
* struct sched_param p = {sched_get_priority_min(SCHED_OTHER)};
* pthread_setschedparam(thread, SCHED_OTHER, &p);
*
* @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`
* @raise ENOSYS on XNU, Windows, OpenBSD
* @raise EPERM if not authorized to use scheduler in question (e.g.
* trying to use a real-time scheduler as non-root on Linux) or
* possibly because pledge() was used and isn't allowing this
* @see sched_get_priority_min()
* @see sched_get_priority_max()
* @see sched_setscheduler()
*/
int pthread_setschedparam(pthread_t thread, int policy,
const struct sched_param *param) {
struct PosixThread *pt = (struct PosixThread *)thread;
if (!param) return EINVAL;
pt->attr.schedpolicy = policy;
pt->attr.schedparam = param->sched_priority;
return _pthread_reschedule(pt);
}

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@ -0,0 +1,48 @@
/*-*- 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/calls/struct/sched_param.h"
#include "libc/sysv/consts/sched.h"
#include "libc/thread/freebsd.internal.h"
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/thread.h"
#define RTP_SET_FREEBSD 1
#define PRI_REALTIME_FREEBSD 2
#define RTP_PRIO_MAX_FREEBSD 31
#define PRI_FIFO_BIT_FREEBSD 8
#define PRI_FIFO_FREEBSD (PRI_REALTIME_FREEBSD | PRI_FIFO_BIT_FREEBSD)
#define PRI_TIMESHARE_FREEBSD 3
int rtprio_thread(int fun, int tid, struct rtprio *inout_rtp);
int _pthread_setschedparam_freebsd(int tid, int policy,
const struct sched_param *param) {
struct rtprio rtp;
if (policy == SCHED_RR) {
rtp.type = PRI_REALTIME_FREEBSD;
rtp.prio = RTP_PRIO_MAX_FREEBSD - param->sched_priority;
} else if (policy == SCHED_FIFO) {
rtp.type = PRI_FIFO_FREEBSD;
rtp.prio = RTP_PRIO_MAX_FREEBSD - param->sched_priority;
} else {
rtp.type = PRI_TIMESHARE_FREEBSD;
rtp.prio = 0;
}
return rtprio_thread(RTP_SET_FREEBSD, tid, &rtp);
}