2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
5 * Copyright (C) 2003 Daniel M. Eischen <deischen@freebsd.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/types.h>
34 #include <sys/signalvar.h>
35 #include <sys/rtprio.h>
39 #include "thr_private.h"
41 /*#define DEBUG_THREAD_KERN */
42 #ifdef DEBUG_THREAD_KERN
43 #define DBG_MSG stdout_debug
48 static struct umutex addr_lock;
49 static struct wake_addr *wake_addr_head;
50 static struct wake_addr default_wake_addr;
53 * This is called when the first thread (other than the initial
57 _thr_setthreaded(int threaded)
59 if (((threaded == 0) ^ (__isthreaded == 0)) == 0)
62 __isthreaded = threaded;
67 _thr_assert_lock_level(void)
69 PANIC("locklevel <= 0");
73 _rtp_to_schedparam(const struct rtprio *rtp, int *policy,
74 struct sched_param *param)
77 case RTP_PRIO_REALTIME:
79 param->sched_priority = RTP_PRIO_MAX - rtp->prio;
83 param->sched_priority = RTP_PRIO_MAX - rtp->prio;
86 *policy = SCHED_OTHER;
87 param->sched_priority = 0;
94 _schedparam_to_rtp(int policy, const struct sched_param *param,
99 rtp->type = RTP_PRIO_REALTIME;
100 rtp->prio = RTP_PRIO_MAX - param->sched_priority;
103 rtp->type = RTP_PRIO_FIFO;
104 rtp->prio = RTP_PRIO_MAX - param->sched_priority;
108 rtp->type = RTP_PRIO_NORMAL;
116 _thr_getscheduler(lwpid_t lwpid, int *policy, struct sched_param *param)
121 ret = rtprio_thread(RTP_LOOKUP, lwpid, &rtp);
124 _rtp_to_schedparam(&rtp, policy, param);
129 _thr_setscheduler(lwpid_t lwpid, int policy, const struct sched_param *param)
133 _schedparam_to_rtp(policy, param, &rtp);
134 return (rtprio_thread(RTP_SET, lwpid, &rtp));
138 _thr_wake_addr_init(void)
140 _thr_umutex_init(&addr_lock);
141 wake_addr_head = NULL;
145 * Allocate wake-address, the memory area is never freed after
146 * allocated, this becauses threads may be referencing it.
149 _thr_alloc_wake_addr(void)
151 struct pthread *curthread;
154 if (_thr_initial == NULL) {
155 return &default_wake_addr;
158 curthread = _get_curthread();
160 THR_LOCK_ACQUIRE(curthread, &addr_lock);
161 if (wake_addr_head == NULL) {
163 unsigned pagesize = getpagesize();
164 struct wake_addr *pp = (struct wake_addr *)
165 mmap(NULL, getpagesize(), PROT_READ|PROT_WRITE,
166 MAP_ANON|MAP_PRIVATE, -1, 0);
167 for (i = 1; i < pagesize/sizeof(struct wake_addr); ++i)
168 pp[i].link = &pp[i+1];
170 wake_addr_head = &pp[1];
174 wake_addr_head = p->link;
176 THR_LOCK_RELEASE(curthread, &addr_lock);
182 _thr_release_wake_addr(struct wake_addr *wa)
184 struct pthread *curthread = _get_curthread();
186 if (wa == &default_wake_addr)
188 THR_LOCK_ACQUIRE(curthread, &addr_lock);
189 wa->link = wake_addr_head;
191 THR_LOCK_RELEASE(curthread, &addr_lock);
194 /* Sleep on thread wakeup address */
196 _thr_sleep(struct pthread *curthread, int clockid,
197 const struct timespec *abstime)
200 if (curthread->wake_addr->value != 0)
203 return _thr_umtx_timedwait_uint(&curthread->wake_addr->value, 0,
204 clockid, abstime, 0);
208 _thr_wake_all(unsigned int *waddrs[], int count)
212 for (i = 0; i < count; ++i)
214 _umtx_op(waddrs, UMTX_OP_NWAKE_PRIVATE, count, NULL, NULL);