kern_synch.c (b1c00b13d61eb7cfcd3009d35ed3dc7c79625724) kern_synch.c (37e80fcac22c6734bcdb79e160bc1eac56740c4c)
1/*-
2 * Copyright (c) 1982, 1986, 1990, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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64
65#include <machine/cpu.h>
66
67static void synch_setup(void *dummy);
68SYSINIT(synch_setup, SI_SUB_KICK_SCHEDULER, SI_ORDER_FIRST, synch_setup, NULL)
69
70int hogticks;
71int lbolt;
1/*-
2 * Copyright (c) 1982, 1986, 1990, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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64
65#include <machine/cpu.h>
66
67static void synch_setup(void *dummy);
68SYSINIT(synch_setup, SI_SUB_KICK_SCHEDULER, SI_ORDER_FIRST, synch_setup, NULL)
69
70int hogticks;
71int lbolt;
72static int pause_wchan;
72
73static struct callout loadav_callout;
74static struct callout lbolt_callout;
75
76struct loadavg averunnable =
77 { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */
78/*
79 * Constants for averages over 1, 5, and 15 minutes

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159 /*
160 * If we are already on a sleep queue, then remove us from that
161 * sleep queue first. We have to do this to handle recursive
162 * sleeps.
163 */
164 if (TD_ON_SLEEPQ(td))
165 sleepq_remove(td, td->td_wchan);
166
73
74static struct callout loadav_callout;
75static struct callout lbolt_callout;
76
77struct loadavg averunnable =
78 { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */
79/*
80 * Constants for averages over 1, 5, and 15 minutes

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160 /*
161 * If we are already on a sleep queue, then remove us from that
162 * sleep queue first. We have to do this to handle recursive
163 * sleeps.
164 */
165 if (TD_ON_SLEEPQ(td))
166 sleepq_remove(td, td->td_wchan);
167
167 flags = SLEEPQ_MSLEEP;
168 if (ident == &pause_wchan)
169 flags = SLEEPQ_PAUSE;
170 else
171 flags = SLEEPQ_MSLEEP;
168 if (catch)
169 flags |= SLEEPQ_INTERRUPTIBLE;
170
171 sleepq_lock(ident);
172 CTR5(KTR_PROC, "msleep: thread %p (pid %ld, %s) on %s (%p)",
173 (void *)td, (long)p->p_pid, p->p_comm, wmesg, ident);
174
175 DROP_GIANT();

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303#endif
304 PICKUP_GIANT();
305 mtx_lock_spin(mtx);
306 WITNESS_RESTORE(&mtx->mtx_object, mtx);
307 return (rval);
308}
309
310/*
172 if (catch)
173 flags |= SLEEPQ_INTERRUPTIBLE;
174
175 sleepq_lock(ident);
176 CTR5(KTR_PROC, "msleep: thread %p (pid %ld, %s) on %s (%p)",
177 (void *)td, (long)p->p_pid, p->p_comm, wmesg, ident);
178
179 DROP_GIANT();

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307#endif
308 PICKUP_GIANT();
309 mtx_lock_spin(mtx);
310 WITNESS_RESTORE(&mtx->mtx_object, mtx);
311 return (rval);
312}
313
314/*
315 * pause() is like tsleep() except that the intention is to not be
316 * explicitly woken up by another thread. Instead, the current thread
317 * simply wishes to sleep until the timeout expires. It is
318 * implemented using a dummy wait channel.
319 */
320int
321pause(wmesg, timo)
322 const char *wmesg;
323 int timo;
324{
325
326 KASSERT(timo != 0, ("pause: timeout required"));
327 return (tsleep(&pause_wchan, 0, wmesg, timo));
328}
329
330/*
311 * Make all threads sleeping on the specified identifier runnable.
312 */
313void
314wakeup(ident)
315 register void *ident;
316{
317
318 sleepq_lock(ident);

--- 239 unchanged lines hidden --- 		331 * Make all threads sleeping on the specified identifier runnable.
332 */
333void
334wakeup(ident)
335 register void *ident;
336{
337
338 sleepq_lock(ident);

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