2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
3 * Copyright (C) 2003 Daniel M. Eischen <deischen@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions, and the following
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/types.h>
31 #include <sys/signalvar.h>
32 #include <sys/rtprio.h>
36 #include "thr_private.h"
38 /*#define DEBUG_THREAD_KERN */
39 #ifdef DEBUG_THREAD_KERN
40 #define DBG_MSG stdout_debug
45 static struct umutex addr_lock;
46 static struct wake_addr *wake_addr_head;
47 static struct wake_addr default_wake_addr;
50 * This is called when the first thread (other than the initial
54 _thr_setthreaded(int threaded)
56 if (((threaded == 0) ^ (__isthreaded == 0)) == 0)
59 __isthreaded = threaded;
69 _thr_assert_lock_level()
71 PANIC("locklevel <= 0");
75 _rtp_to_schedparam(const struct rtprio *rtp, int *policy,
76 struct sched_param *param)
79 case RTP_PRIO_REALTIME:
81 param->sched_priority = RTP_PRIO_MAX - rtp->prio;
85 param->sched_priority = RTP_PRIO_MAX - rtp->prio;
88 *policy = SCHED_OTHER;
89 param->sched_priority = 0;
96 _schedparam_to_rtp(int policy, const struct sched_param *param,
101 rtp->type = RTP_PRIO_REALTIME;
102 rtp->prio = RTP_PRIO_MAX - param->sched_priority;
105 rtp->type = RTP_PRIO_FIFO;
106 rtp->prio = RTP_PRIO_MAX - param->sched_priority;
110 rtp->type = RTP_PRIO_NORMAL;
118 _thr_getscheduler(lwpid_t lwpid, int *policy, struct sched_param *param)
123 ret = rtprio_thread(RTP_LOOKUP, lwpid, &rtp);
126 _rtp_to_schedparam(&rtp, policy, param);
131 _thr_setscheduler(lwpid_t lwpid, int policy, const struct sched_param *param)
135 _schedparam_to_rtp(policy, param, &rtp);
136 return (rtprio_thread(RTP_SET, lwpid, &rtp));
140 _thr_wake_addr_init(void)
142 _thr_umutex_init(&addr_lock);
143 wake_addr_head = NULL;
147 * Allocate wake-address, the memory area is never freed after
148 * allocated, this becauses threads may be referencing it.
151 _thr_alloc_wake_addr(void)
153 struct pthread *curthread;
156 if (_thr_initial == NULL) {
157 return &default_wake_addr;
160 curthread = _get_curthread();
162 THR_LOCK_ACQUIRE(curthread, &addr_lock);
163 if (wake_addr_head == NULL) {
165 unsigned pagesize = getpagesize();
166 struct wake_addr *pp = (struct wake_addr *)
167 mmap(NULL, getpagesize(), PROT_READ|PROT_WRITE,
168 MAP_ANON|MAP_PRIVATE, -1, 0);
169 for (i = 1; i < pagesize/sizeof(struct wake_addr); ++i)
170 pp[i].link = &pp[i+1];
172 wake_addr_head = &pp[1];
176 wake_addr_head = p->link;
178 THR_LOCK_RELEASE(curthread, &addr_lock);
184 _thr_release_wake_addr(struct wake_addr *wa)
186 struct pthread *curthread = _get_curthread();
188 if (wa == &default_wake_addr)
190 THR_LOCK_ACQUIRE(curthread, &addr_lock);
191 wa->link = wake_addr_head;
193 THR_LOCK_RELEASE(curthread, &addr_lock);
196 /* Sleep on thread wakeup address */
198 _thr_sleep(struct pthread *curthread, int clockid,
199 const struct timespec *abstime)
202 curthread->will_sleep = 0;
203 if (curthread->nwaiter_defer > 0) {
204 _thr_wake_all(curthread->defer_waiters,
205 curthread->nwaiter_defer);
206 curthread->nwaiter_defer = 0;
209 if (curthread->wake_addr->value != 0)
212 return _thr_umtx_timedwait_uint(&curthread->wake_addr->value, 0,
213 clockid, abstime, 0);
217 _thr_wake_all(unsigned int *waddrs[], int count)
221 for (i = 0; i < count; ++i)
223 _umtx_op(waddrs, UMTX_OP_NWAKE_PRIVATE, count, NULL, NULL);