timer-r0drv-solaris.c@ 85505

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1	/* $Id: timer-r0drv-solaris.c 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* IPRT - Timer, Ring-0 Driver, Solaris.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include "the-solaris-kernel.h"
32	#include "internal/iprt.h"
33	#include <iprt/timer.h>
34
35	#include <iprt/asm.h>
36	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
37	# include <iprt/asm-amd64-x86.h>
38	#endif
39	#include <iprt/assert.h>
40	#include <iprt/err.h>
41	#include <iprt/mem.h>
42	#include <iprt/mp.h>
43	#include <iprt/spinlock.h>
44	#include <iprt/time.h>
45	#include <iprt/thread.h>
46	#include "internal/magics.h"
47
48
49	/*********************************************************************************************************************************
50	* Structures and Typedefs *
51	*********************************************************************************************************************************/
52	/**
53	* The internal representation of a Solaris timer handle.
54	*/
55	typedef struct RTTIMER
56	{
57	/** Magic.
58	* This is RTTIMER_MAGIC, but changes to something else before the timer
59	* is destroyed to indicate clearly that thread should exit. */
60	uint32_t volatile u32Magic;
61	/** Reference counter. */
62	uint32_t volatile cRefs;
63	/** Flag indicating that the timer is suspended (hCyclicId should be
64	* CYCLIC_NONE). */
65	bool volatile fSuspended;
66	/** Flag indicating that the timer was suspended from the timer callback and
67	* therefore the hCyclicId may still be valid. */
68	bool volatile fSuspendedFromTimer;
69	/** Flag indicating that the timer interval was changed and that it requires
70	* manual expiration time programming for each callout. */
71	bool volatile fIntervalChanged;
72	/** Whether the timer must run on all CPUs or not. */
73	uint8_t fAllCpus;
74	/** Whether the timer must run on a specific CPU or not. */
75	uint8_t fSpecificCpu;
76	/** The CPU it must run on if fSpecificCpu is set. */
77	uint32_t iCpu;
78	/** The nano second interval for repeating timers. */
79	uint64_t volatile cNsInterval;
80	/** Cyclic timer Id. This is CYCLIC_NONE if no active timer.
81	* @remarks Please keep in mind that cyclic may call us back before the
82	* cyclic_add/cyclic_add_omni functions returns, so don't use this
83	* unguarded with cyclic_reprogram. */
84	cyclic_id_t hCyclicId;
85	/** The user callback. */
86	PFNRTTIMER pfnTimer;
87	/** The argument for the user callback. */
88	void *pvUser;
89	/** Union with timer type specific data. */
90	union
91	{
92	/** Single timer (fAllCpus == false). */
93	struct
94	{
95	/** Timer ticks. */
96	uint64_t u64Tick;
97	/** The next tick when fIntervalChanged is true, otherwise 0. */
98	uint64_t nsNextTick;
99	/** The (interrupt) thread currently active in the callback. */
100	kthread_t * volatile pActiveThread;
101	} Single;
102
103	/** Omni timer (fAllCpus == true). */
104	struct
105	{
106	/** Absolute timestamp of when the timer should fire first when starting up. */
107	uint64_t u64When;
108	/** Array of per CPU data (variable size). */
109	struct
110	{
111	/** Timer ticks (reinitialized when online'd). */
112	uint64_t u64Tick;
113	/** The (interrupt) thread currently active in the callback. */
114	kthread_t * volatile pActiveThread;
115	/** The next tick when fIntervalChanged is true, otherwise 0. */
116	uint64_t nsNextTick;
117	} aPerCpu[1];
118	} Omni;
119	} u;
120	} RTTIMER;
121
122
123	/*********************************************************************************************************************************
124	* Defined Constants And Macros *
125	*********************************************************************************************************************************/
126	/** Validates that the timer is valid. */
127	#define RTTIMER_ASSERT_VALID_RET(pTimer) \
128	do \
129	{ \
130	AssertPtrReturn(pTimer, VERR_INVALID_HANDLE); \
131	AssertMsgReturn((pTimer)->u32Magic == RTTIMER_MAGIC, ("pTimer=%p u32Magic=%x expected %x\n", (pTimer), (pTimer)->u32Magic, RTTIMER_MAGIC), \
132	VERR_INVALID_HANDLE); \
133	} while (0)
134
135
136	/*********************************************************************************************************************************
137	* Internal Functions *
138	*********************************************************************************************************************************/
139	static void rtTimerSolSingleCallbackWrapper(void *pvArg);
140	static void rtTimerSolStopIt(PRTTIMER pTimer);
141
142
143	/**
144	* Retains a reference to the timer.
145	*
146	* @returns New reference counter value.
147	* @param pTimer The timer.
148	*/
149	DECLINLINE(uint32_t) rtTimerSolRetain(PRTTIMER pTimer)
150	{
151	return ASMAtomicIncU32(&pTimer->cRefs);
152	}
153
154
155	/**
156	* Destroys the timer when the reference counter has reached zero.
157	*
158	* @returns 0 (new references counter value).
159	* @param pTimer The timer.
160	*/
161	static uint32_t rtTimeSolReleaseCleanup(PRTTIMER pTimer)
162	{
163	Assert(pTimer->hCyclicId == CYCLIC_NONE);
164	ASMAtomicWriteU32(&pTimer->u32Magic, ~RTTIMER_MAGIC);
165	RTMemFree(pTimer);
166	return 0;
167	}
168
169
170	/**
171	* Releases a reference to the timer.
172	*
173	* @returns New reference counter value.
174	* @param pTimer The timer.
175	*/
176	DECLINLINE(uint32_t) rtTimerSolRelease(PRTTIMER pTimer)
177	{
178	uint32_t cRefs = ASMAtomicDecU32(&pTimer->cRefs);
179	if (!cRefs)
180	return rtTimeSolReleaseCleanup(pTimer);
181	return cRefs;
182	}
183
184
185	/**
186	* Callback wrapper for single-CPU timers.
187	*
188	* @param pvArg Opaque pointer to the timer.
189	*
190	* @remarks This will be executed in interrupt context but only at the specified
191	* level i.e. CY_LOCK_LEVEL in our case. We -CANNOT- call into the
192	* cyclic subsystem here, neither should pfnTimer().
193	*/
194	static void rtTimerSolSingleCallbackWrapper(void *pvArg)
195	{
196	PRTTIMER pTimer = (PRTTIMER)pvArg;
197	AssertPtrReturnVoid(pTimer);
198	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
199	Assert(!pTimer->fAllCpus);
200
201	/* Make sure one-shots do not fire another time. */
202	Assert( !pTimer->fSuspended
203	\|\| pTimer->cNsInterval != 0);
204
205	if (!pTimer->fSuspendedFromTimer)
206	{
207	/* Make sure we are firing on the right CPU. */
208	Assert( !pTimer->fSpecificCpu
209	\|\| pTimer->iCpu == RTMpCpuId());
210
211	/* For one-shot, we may allow the callback to restart them. */
212	if (pTimer->cNsInterval == 0)
213	pTimer->fSuspendedFromTimer = true;
214
215	/*
216	* Perform the callout.
217	*/
218	pTimer->u.Single.pActiveThread = curthread;
219
220	uint64_t u64Tick = ++pTimer->u.Single.u64Tick;
221	pTimer->pfnTimer(pTimer, pTimer->pvUser, u64Tick);
222
223	pTimer->u.Single.pActiveThread = NULL;
224
225	if (RT_LIKELY(!pTimer->fSuspendedFromTimer))
226	{
227	if ( !pTimer->fIntervalChanged
228	\|\| RT_UNLIKELY(pTimer->hCyclicId == CYCLIC_NONE))
229	return;
230
231	/*
232	* The interval was changed, we need to set the expiration time
233	* ourselves before returning. This comes at a slight cost,
234	* which is why we don't do it all the time.
235	*/
236	if (pTimer->u.Single.nsNextTick)
237	pTimer->u.Single.nsNextTick += ASMAtomicUoReadU64(&pTimer->cNsInterval);
238	else
239	pTimer->u.Single.nsNextTick = RTTimeSystemNanoTS() + ASMAtomicUoReadU64(&pTimer->cNsInterval);
240	cyclic_reprogram(pTimer->hCyclicId, pTimer->u.Single.nsNextTick);
241	return;
242	}
243
244	/*
245	* The timer has been suspended, set expiration time to infinitiy.
246	*/
247	}
248	if (RT_LIKELY(pTimer->hCyclicId != CYCLIC_NONE))
249	cyclic_reprogram(pTimer->hCyclicId, CY_INFINITY);
250	}
251
252
253	/**
254	* Callback wrapper for Omni-CPU timers.
255	*
256	* @param pvArg Opaque pointer to the timer.
257	*
258	* @remarks This will be executed in interrupt context but only at the specified
259	* level i.e. CY_LOCK_LEVEL in our case. We -CANNOT- call into the
260	* cyclic subsystem here, neither should pfnTimer().
261	*/
262	static void rtTimerSolOmniCallbackWrapper(void *pvArg)
263	{
264	PRTTIMER pTimer = (PRTTIMER)pvArg;
265	AssertPtrReturnVoid(pTimer);
266	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
267	Assert(pTimer->fAllCpus);
268
269	if (!pTimer->fSuspendedFromTimer)
270	{
271	/*
272	* Perform the callout.
273	*/
274	uint32_t const iCpu = CPU->cpu_id;
275
276	pTimer->u.Omni.aPerCpu[iCpu].pActiveThread = curthread;
277	uint64_t u64Tick = ++pTimer->u.Omni.aPerCpu[iCpu].u64Tick;
278
279	pTimer->pfnTimer(pTimer, pTimer->pvUser, u64Tick);
280
281	pTimer->u.Omni.aPerCpu[iCpu].pActiveThread = NULL;
282
283	if (RT_LIKELY(!pTimer->fSuspendedFromTimer))
284	{
285	if ( !pTimer->fIntervalChanged
286	\|\| RT_UNLIKELY(pTimer->hCyclicId == CYCLIC_NONE))
287	return;
288
289	/*
290	* The interval was changed, we need to set the expiration time
291	* ourselves before returning. This comes at a slight cost,
292	* which is why we don't do it all the time.
293	*
294	* Note! The cyclic_reprogram call only affects the omni cyclic
295	* component for this CPU.
296	*/
297	if (pTimer->u.Omni.aPerCpu[iCpu].nsNextTick)
298	pTimer->u.Omni.aPerCpu[iCpu].nsNextTick += ASMAtomicUoReadU64(&pTimer->cNsInterval);
299	else
300	pTimer->u.Omni.aPerCpu[iCpu].nsNextTick = RTTimeSystemNanoTS() + ASMAtomicUoReadU64(&pTimer->cNsInterval);
301	cyclic_reprogram(pTimer->hCyclicId, pTimer->u.Omni.aPerCpu[iCpu].nsNextTick);
302	return;
303	}
304
305	/*
306	* The timer has been suspended, set expiration time to infinitiy.
307	*/
308	}
309	if (RT_LIKELY(pTimer->hCyclicId != CYCLIC_NONE))
310	cyclic_reprogram(pTimer->hCyclicId, CY_INFINITY);
311	}
312
313
314	/**
315	* Omni-CPU cyclic online event. This is called before the omni cycle begins to
316	* fire on the specified CPU.
317	*
318	* @param pvArg Opaque pointer to the timer.
319	* @param pCpu Pointer to the CPU on which it will fire.
320	* @param pCyclicHandler Pointer to a cyclic handler to add to the CPU
321	* specified in @a pCpu.
322	* @param pCyclicTime Pointer to the cyclic time and interval object.
323	*
324	* @remarks We -CANNOT- call back into the cyclic subsystem here, we can however
325	* block (sleep).
326	*/
327	static void rtTimerSolOmniCpuOnline(void pvArg, cpu_t pCpu, cyc_handler_t pCyclicHandler, cyc_time_t pCyclicTime)
328	{
329	PRTTIMER pTimer = (PRTTIMER)pvArg;
330	AssertPtrReturnVoid(pTimer);
331	AssertPtrReturnVoid(pCpu);
332	AssertPtrReturnVoid(pCyclicHandler);
333	AssertPtrReturnVoid(pCyclicTime);
334	uint32_t const iCpu = pCpu->cpu_id; /* Note! CPU is not necessarily the same as pCpu. */
335
336	pTimer->u.Omni.aPerCpu[iCpu].u64Tick = 0;
337	pTimer->u.Omni.aPerCpu[iCpu].nsNextTick = 0;
338
339	pCyclicHandler->cyh_func = (cyc_func_t)rtTimerSolOmniCallbackWrapper;
340	pCyclicHandler->cyh_arg = pTimer;
341	pCyclicHandler->cyh_level = CY_LOCK_LEVEL;
342
343	uint64_t u64Now = RTTimeSystemNanoTS();
344	if (pTimer->u.Omni.u64When < u64Now)
345	pCyclicTime->cyt_when = u64Now + pTimer->cNsInterval / 2;
346	else
347	pCyclicTime->cyt_when = pTimer->u.Omni.u64When;
348
349	pCyclicTime->cyt_interval = pTimer->cNsInterval;
350	}
351
352
353	RTDECL(int) RTTimerCreateEx(PRTTIMER ppTimer, uint64_t u64NanoInterval, uint32_t fFlags, PFNRTTIMER pfnTimer, void pvUser)
354	{
355	RT_ASSERT_PREEMPTIBLE();
356	*ppTimer = NULL;
357
358	/*
359	* Validate flags.
360	*/
361	if (!RTTIMER_FLAGS_ARE_VALID(fFlags))
362	return VERR_INVALID_PARAMETER;
363
364	if ( (fFlags & RTTIMER_FLAGS_CPU_SPECIFIC)
365	&& (fFlags & RTTIMER_FLAGS_CPU_ALL) != RTTIMER_FLAGS_CPU_ALL
366	&& !RTMpIsCpuPossible(RTMpCpuIdFromSetIndex(fFlags & RTTIMER_FLAGS_CPU_MASK)))
367	return VERR_CPU_NOT_FOUND;
368
369	/* One-shot omni timers are not supported by the cyclic system. */
370	if ( (fFlags & RTTIMER_FLAGS_CPU_ALL) == RTTIMER_FLAGS_CPU_ALL
371	&& u64NanoInterval == 0)
372	return VERR_NOT_SUPPORTED;
373
374	/*
375	* Allocate and initialize the timer handle. The omni variant has a
376	* variable sized array of ticks counts, thus the size calculation.
377	*/
378	PRTTIMER pTimer = (PRTTIMER)RTMemAllocZ( (fFlags & RTTIMER_FLAGS_CPU_ALL) == RTTIMER_FLAGS_CPU_ALL
379	? RT_UOFFSETOF_DYN(RTTIMER, u.Omni.aPerCpu[RTMpGetCount()])
380	: sizeof(RTTIMER));
381	if (!pTimer)
382	return VERR_NO_MEMORY;
383
384	pTimer->u32Magic = RTTIMER_MAGIC;
385	pTimer->cRefs = 1;
386	pTimer->fSuspended = true;
387	pTimer->fSuspendedFromTimer = false;
388	pTimer->fIntervalChanged = false;
389	if ((fFlags & RTTIMER_FLAGS_CPU_ALL) == RTTIMER_FLAGS_CPU_ALL)
390	{
391	pTimer->fAllCpus = true;
392	pTimer->fSpecificCpu = false;
393	pTimer->iCpu = UINT32_MAX;
394	}
395	else if (fFlags & RTTIMER_FLAGS_CPU_SPECIFIC)
396	{
397	pTimer->fAllCpus = false;
398	pTimer->fSpecificCpu = true;
399	pTimer->iCpu = fFlags & RTTIMER_FLAGS_CPU_MASK; /* ASSUMES: index == cpuid */
400	}
401	else
402	{
403	pTimer->fAllCpus = false;
404	pTimer->fSpecificCpu = false;
405	pTimer->iCpu = UINT32_MAX;
406	}
407	pTimer->cNsInterval = u64NanoInterval;
408	pTimer->pfnTimer = pfnTimer;
409	pTimer->pvUser = pvUser;
410	pTimer->hCyclicId = CYCLIC_NONE;
411
412	*ppTimer = pTimer;
413	return VINF_SUCCESS;
414	}
415
416
417	/**
418	* Checks if the calling thread is currently executing the timer proceduce for
419	* the given timer.
420	*
421	* @returns true if it is, false if it isn't.
422	* @param pTimer The timer in question.
423	*/
424	DECLINLINE(bool) rtTimerSolIsCallingFromTimerProc(PRTTIMER pTimer)
425	{
426	kthread_t *pCurThread = curthread;
427	AssertReturn(pCurThread, false); /* serious paranoia */
428
429	if (!pTimer->fAllCpus)
430	return pTimer->u.Single.pActiveThread == pCurThread;
431	return pTimer->u.Omni.aPerCpu[CPU->cpu_id].pActiveThread == pCurThread;
432	}
433
434
435	RTDECL(int) RTTimerDestroy(PRTTIMER pTimer)
436	{
437	if (pTimer == NULL)
438	return VINF_SUCCESS;
439	RTTIMER_ASSERT_VALID_RET(pTimer);
440	RT_ASSERT_INTS_ON();
441
442	/*
443	* It is not possible to destroy a timer from it's callback function.
444	* Cyclic makes that impossible (or at least extremely risky).
445	*/
446	AssertReturn(!rtTimerSolIsCallingFromTimerProc(pTimer), VERR_INVALID_CONTEXT);
447
448	/*
449	* Invalidate the handle, make sure it's stopped and free the associated resources.
450	*/
451	ASMAtomicWriteU32(&pTimer->u32Magic, ~RTTIMER_MAGIC);
452
453	if ( !pTimer->fSuspended
454	\|\| pTimer->hCyclicId != CYCLIC_NONE) /* 2nd check shouldn't happen */
455	rtTimerSolStopIt(pTimer);
456
457	rtTimerSolRelease(pTimer);
458	return VINF_SUCCESS;
459	}
460
461
462	RTDECL(int) RTTimerStart(PRTTIMER pTimer, uint64_t u64First)
463	{
464	RTTIMER_ASSERT_VALID_RET(pTimer);
465	RT_ASSERT_INTS_ON();
466
467	/*
468	* It's not possible to restart a one-shot time from it's callback function,
469	* at least not at the moment.
470	*/
471	AssertReturn(!rtTimerSolIsCallingFromTimerProc(pTimer), VERR_INVALID_CONTEXT);
472
473	mutex_enter(&cpu_lock);
474
475	/*
476	* Make sure it's not active already. If it was suspended from a timer
477	* callback function, we need to do some cleanup work here before we can
478	* restart the timer.
479	*/
480	if (!pTimer->fSuspended)
481	{
482	if (!pTimer->fSuspendedFromTimer)
483	{
484	mutex_exit(&cpu_lock);
485	return VERR_TIMER_ACTIVE;
486	}
487	cyclic_remove(pTimer->hCyclicId);
488	pTimer->hCyclicId = CYCLIC_NONE;
489	}
490
491	pTimer->fSuspended = false;
492	pTimer->fSuspendedFromTimer = false;
493	pTimer->fIntervalChanged = false;
494	if (pTimer->fAllCpus)
495	{
496	/*
497	* Setup omni (all CPU) timer. The Omni-CPU online event will fire
498	* and from there we setup periodic timers per CPU.
499	*/
500	pTimer->u.Omni.u64When = RTTimeSystemNanoTS() + (u64First ? u64First : pTimer->cNsInterval);
501
502	cyc_omni_handler_t HandlerOmni;
503	HandlerOmni.cyo_online = rtTimerSolOmniCpuOnline;
504	HandlerOmni.cyo_offline = NULL;
505	HandlerOmni.cyo_arg = pTimer;
506
507	pTimer->hCyclicId = cyclic_add_omni(&HandlerOmni);
508	}
509	else
510	{
511	cyc_handler_t Handler;
512	cyc_time_t FireTime;
513
514	/*
515	* Setup a single CPU timer. If a specific CPU was requested, it
516	* must be online or the timer cannot start.
517	*/
518	if ( pTimer->fSpecificCpu
519	&& !RTMpIsCpuOnline(pTimer->iCpu)) /* ASSUMES: index == cpuid */
520	{
521	pTimer->fSuspended = true;
522
523	mutex_exit(&cpu_lock);
524	return VERR_CPU_OFFLINE;
525	}
526
527	Handler.cyh_func = (cyc_func_t)rtTimerSolSingleCallbackWrapper;
528	Handler.cyh_arg = pTimer;
529	Handler.cyh_level = CY_LOCK_LEVEL;
530
531	/*
532	* Use a large interval (1 hour) so that we don't get a timer-callback between
533	* cyclic_add() and cyclic_bind(). Program the correct interval once cyclic_bind() is done.
534	* See @bugref{7691#c20}.
535	*/
536	if (!pTimer->fSpecificCpu)
537	FireTime.cyt_when = RTTimeSystemNanoTS() + u64First;
538	else
539	FireTime.cyt_when = RTTimeSystemNanoTS() + u64First + RT_NS_1HOUR;
540	FireTime.cyt_interval = pTimer->cNsInterval != 0
541	? pTimer->cNsInterval
542	: CY_INFINITY /* Special value, see cyclic_fire(). */;
543	pTimer->u.Single.u64Tick = 0;
544	pTimer->u.Single.nsNextTick = 0;
545
546	pTimer->hCyclicId = cyclic_add(&Handler, &FireTime);
547	if (pTimer->fSpecificCpu)
548	{
549	cyclic_bind(pTimer->hCyclicId, cpu[pTimer->iCpu], NULL /* cpupart */);
550	cyclic_reprogram(pTimer->hCyclicId, RTTimeSystemNanoTS() + u64First);
551	}
552	}
553
554	mutex_exit(&cpu_lock);
555	return VINF_SUCCESS;
556	}
557
558
559	/**
560	* Worker common for RTTimerStop and RTTimerDestroy.
561	*
562	* @param pTimer The timer to stop.
563	*/
564	static void rtTimerSolStopIt(PRTTIMER pTimer)
565	{
566	mutex_enter(&cpu_lock);
567
568	pTimer->fSuspended = true;
569	if (pTimer->hCyclicId != CYCLIC_NONE)
570	{
571	cyclic_remove(pTimer->hCyclicId);
572	pTimer->hCyclicId = CYCLIC_NONE;
573	}
574	pTimer->fSuspendedFromTimer = false;
575
576	mutex_exit(&cpu_lock);
577	}
578
579
580	RTDECL(int) RTTimerStop(PRTTIMER pTimer)
581	{
582	RTTIMER_ASSERT_VALID_RET(pTimer);
583	RT_ASSERT_INTS_ON();
584
585	if (pTimer->fSuspended)
586	return VERR_TIMER_SUSPENDED;
587
588	/* Trying the cpu_lock stuff and calling cyclic_remove may deadlock
589	the system, so just mark the timer as suspened and deal with it in
590	the callback wrapper function above. */
591	if (rtTimerSolIsCallingFromTimerProc(pTimer))
592	pTimer->fSuspendedFromTimer = true;
593	else
594	rtTimerSolStopIt(pTimer);
595
596	return VINF_SUCCESS;
597	}
598
599
600	RTDECL(int) RTTimerChangeInterval(PRTTIMER pTimer, uint64_t u64NanoInterval)
601	{
602	/*
603	* Validate.
604	*/
605	RTTIMER_ASSERT_VALID_RET(pTimer);
606	AssertReturn(u64NanoInterval > 0, VERR_INVALID_PARAMETER);
607	AssertReturn(u64NanoInterval < UINT64_MAX / 8, VERR_INVALID_PARAMETER);
608	AssertReturn(pTimer->cNsInterval, VERR_INVALID_STATE);
609
610	if (pTimer->fSuspended \|\| pTimer->fSuspendedFromTimer)
611	pTimer->cNsInterval = u64NanoInterval;
612	else
613	{
614	ASMAtomicWriteU64(&pTimer->cNsInterval, u64NanoInterval);
615	ASMAtomicWriteBool(&pTimer->fIntervalChanged, true);
616
617	if ( !pTimer->fAllCpus
618	&& !pTimer->u.Single.nsNextTick
619	&& pTimer->hCyclicId != CYCLIC_NONE
620	&& rtTimerSolIsCallingFromTimerProc(pTimer))
621	pTimer->u.Single.nsNextTick = RTTimeSystemNanoTS();
622	}
623
624	return VINF_SUCCESS;
625	}
626
627
628	RTDECL(uint32_t) RTTimerGetSystemGranularity(void)
629	{
630	return nsec_per_tick;
631	}
632
633
634	RTDECL(int) RTTimerRequestSystemGranularity(uint32_t u32Request, uint32_t *pu32Granted)
635	{
636	return VERR_NOT_SUPPORTED;
637	}
638
639
640	RTDECL(int) RTTimerReleaseSystemGranularity(uint32_t u32Granted)
641	{
642	return VERR_NOT_SUPPORTED;
643	}
644
645
646	RTDECL(bool) RTTimerCanDoHighResolution(void)
647	{
648	return true;
649	}
650

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source: vbox/trunk/src/VBox/Runtime/r0drv/solaris/timer-r0drv-solaris.c@ 85505

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