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.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/types.h>
32 #include <sys/signalvar.h>
33 #include <sys/rtprio.h>
37 #include "thr_private.h"
39 /*#define DEBUG_THREAD_KERN */
40 #ifdef DEBUG_THREAD_KERN
41 #define DBG_MSG stdout_debug
46 static struct umutex addr_lock;
47 static struct wake_addr *wake_addr_head;
48 static struct wake_addr default_wake_addr;
51 * This is called when the first thread (other than the initial
55 _thr_setthreaded(int threaded)
57 if (((threaded == 0) ^ (__isthreaded == 0)) == 0)
60 __isthreaded = threaded;
65 _thr_assert_lock_level()
67 PANIC("locklevel <= 0");
71 _rtp_to_schedparam(const struct rtprio *rtp, int *policy,
72 struct sched_param *param)
75 case RTP_PRIO_REALTIME:
77 param->sched_priority = RTP_PRIO_MAX - rtp->prio;
81 param->sched_priority = RTP_PRIO_MAX - rtp->prio;
84 *policy = SCHED_OTHER;
85 param->sched_priority = 0;
92 _schedparam_to_rtp(int policy, const struct sched_param *param,
97 rtp->type = RTP_PRIO_REALTIME;
98 rtp->prio = RTP_PRIO_MAX - param->sched_priority;
101 rtp->type = RTP_PRIO_FIFO;
102 rtp->prio = RTP_PRIO_MAX - param->sched_priority;
106 rtp->type = RTP_PRIO_NORMAL;
114 _thr_getscheduler(lwpid_t lwpid, int *policy, struct sched_param *param)
119 ret = rtprio_thread(RTP_LOOKUP, lwpid, &rtp);
122 _rtp_to_schedparam(&rtp, policy, param);
127 _thr_setscheduler(lwpid_t lwpid, int policy, const struct sched_param *param)
131 _schedparam_to_rtp(policy, param, &rtp);
132 return (rtprio_thread(RTP_SET, lwpid, &rtp));
136 _thr_wake_addr_init(void)
138 _thr_umutex_init(&addr_lock);
139 wake_addr_head = NULL;
143 * Allocate wake-address, the memory area is never freed after
144 * allocated, this becauses threads may be referencing it.
147 _thr_alloc_wake_addr(void)
149 struct pthread *curthread;
152 if (_thr_initial == NULL) {
153 return &default_wake_addr;
156 curthread = _get_curthread();
158 THR_LOCK_ACQUIRE(curthread, &addr_lock);
159 if (wake_addr_head == NULL) {
161 unsigned pagesize = getpagesize();
162 struct wake_addr *pp = (struct wake_addr *)
163 mmap(NULL, getpagesize(), PROT_READ|PROT_WRITE,
164 MAP_ANON|MAP_PRIVATE, -1, 0);
165 for (i = 1; i < pagesize/sizeof(struct wake_addr); ++i)
166 pp[i].link = &pp[i+1];
168 wake_addr_head = &pp[1];
172 wake_addr_head = p->link;
174 THR_LOCK_RELEASE(curthread, &addr_lock);
180 _thr_release_wake_addr(struct wake_addr *wa)
182 struct pthread *curthread = _get_curthread();
184 if (wa == &default_wake_addr)
186 THR_LOCK_ACQUIRE(curthread, &addr_lock);
187 wa->link = wake_addr_head;
189 THR_LOCK_RELEASE(curthread, &addr_lock);
192 /* Sleep on thread wakeup address */
194 _thr_sleep(struct pthread *curthread, int clockid,
195 const struct timespec *abstime)
198 if (curthread->wake_addr->value != 0)
201 return _thr_umtx_timedwait_uint(&curthread->wake_addr->value, 0,
202 clockid, abstime, 0);
206 _thr_wake_all(unsigned int *waddrs[], int count)
210 for (i = 0; i < count; ++i)
212 _umtx_op(waddrs, UMTX_OP_NWAKE_PRIVATE, count, NULL, NULL);