lockvalidator.h@ 104212

Last change on this file since 104212 was 98103, checked in by vboxsync, 23 months ago
Copyright year updates by scm.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 49.5 KB

Line
1	/** @file
2	* IPRT - Lock Validator.
3	*/
4
5	/*
6	* Copyright (C) 2009-2023 Oracle and/or its affiliates.
7	*
8	* This file is part of VirtualBox base platform packages, as
9	* available from https://www.virtualbox.org.
10	*
11	* This program is free software; you can redistribute it and/or
12	* modify it under the terms of the GNU General Public License
13	* as published by the Free Software Foundation, in version 3 of the
14	* License.
15	*
16	* This program is distributed in the hope that it will be useful, but
17	* WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19	* General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with this program; if not, see <https://www.gnu.org/licenses>.
23	*
24	* The contents of this file may alternatively be used under the terms
25	* of the Common Development and Distribution License Version 1.0
26	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
27	* in the VirtualBox distribution, in which case the provisions of the
28	* CDDL are applicable instead of those of the GPL.
29	*
30	* You may elect to license modified versions of this file under the
31	* terms and conditions of either the GPL or the CDDL or both.
32	*
33	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
34	*/
35
36	#ifndef IPRT_INCLUDED_lockvalidator_h
37	#define IPRT_INCLUDED_lockvalidator_h
38	#ifndef RT_WITHOUT_PRAGMA_ONCE
39	# pragma once
40	#endif
41
42	#include <iprt/cdefs.h>
43	#include <iprt/types.h>
44	#include <iprt/assert.h>
45	#include <iprt/thread.h>
46	#include <iprt/stdarg.h>
47
48
49	/** @defgroup grp_rtlockval RTLockValidator - Lock Validator
50	* @ingroup grp_rt
51	* @{
52	*/
53
54	RT_C_DECLS_BEGIN
55
56	/** Pointer to a record union.
57	* @internal */
58	typedef union RTLOCKVALRECUNION *PRTLOCKVALRECUNION;
59
60	/**
61	* Source position.
62	*/
63	typedef struct RTLOCKVALSRCPOS
64	{
65	/** The file where the lock was taken. */
66	R3R0PTRTYPE(const char * volatile) pszFile;
67	/** The function where the lock was taken. */
68	R3R0PTRTYPE(const char * volatile) pszFunction;
69	/** Some ID indicating where the lock was taken, typically an address. */
70	RTHCUINTPTR volatile uId;
71	/** The line number in the file. */
72	uint32_t volatile uLine;
73	#if HC_ARCH_BITS == 64
74	uint32_t u32Padding; /*< Alignment padding. /
75	#endif
76	} RTLOCKVALSRCPOS;
77	AssertCompileSize(RTLOCKVALSRCPOS, HC_ARCH_BITS == 32 ? 16 : 32);
78	/* The pointer types are defined in iprt/types.h. */
79
80	/** @def RTLOCKVALSRCPOS_INIT
81	* Initializer for a RTLOCKVALSRCPOS variable.
82	*
83	* @param pszFile The file name. Optional (NULL).
84	* @param uLine The line number in that file. Optional (0).
85	* @param pszFunction The function. Optional (NULL).
86	* @param uId Some location ID, normally the return address.
87	* Optional (NULL).
88	*/
89	#if HC_ARCH_BITS == 64
90	# define RTLOCKVALSRCPOS_INIT(pszFile, uLine, pszFunction, uId) \
91	{ (pszFile), (pszFunction), (uId), (uLine), 0 }
92	#else
93	# define RTLOCKVALSRCPOS_INIT(pszFile, uLine, pszFunction, uId) \
94	{ (pszFile), (pszFunction), (uId), (uLine) }
95	#endif
96
97	/** @def RTLOCKVALSRCPOS_INIT_DEBUG_API
98	* Initializer for a RTLOCKVALSRCPOS variable in a typicial debug API
99	* variant. Assumes RT_SRC_POS_DECL and RTHCUINTPTR uId as arguments.
100	*/
101	#define RTLOCKVALSRCPOS_INIT_DEBUG_API() \
102	RTLOCKVALSRCPOS_INIT(pszFile, iLine, pszFunction, uId)
103
104	/** @def RTLOCKVALSRCPOS_INIT_NORMAL_API
105	* Initializer for a RTLOCKVALSRCPOS variable in a normal API
106	* variant. Assumes iprt/asm.h is included.
107	*/
108	#define RTLOCKVALSRCPOS_INIT_NORMAL_API() \
109	RTLOCKVALSRCPOS_INIT(__FILE__, __LINE__, __PRETTY_FUNCTION__, (uintptr_t)ASMReturnAddress())
110
111	/** @def RTLOCKVALSRCPOS_INIT_POS_NO_ID
112	* Initializer for a RTLOCKVALSRCPOS variable when no @c uId is present.
113	* Assumes iprt/asm.h is included.
114	*/
115	#define RTLOCKVALSRCPOS_INIT_POS_NO_ID() \
116	RTLOCKVALSRCPOS_INIT(pszFile, iLine, pszFunction, (uintptr_t)ASMReturnAddress())
117
118
119	/**
120	* Lock validator record core.
121	*/
122	typedef struct RTLOCKVALRECORE
123	{
124	/** The magic value indicating the record type. */
125	uint32_t volatile u32Magic;
126	} RTLOCKVALRECCORE;
127	/** Pointer to a lock validator record core. */
128	typedef RTLOCKVALRECCORE *PRTLOCKVALRECCORE;
129	/** Pointer to a const lock validator record core. */
130	typedef RTLOCKVALRECCORE const *PCRTLOCKVALRECCORE;
131
132
133	/**
134	* Record recording the exclusive ownership of a lock.
135	*
136	* This is typically part of the per-lock data structure when compiling with
137	* the lock validator.
138	*/
139	typedef struct RTLOCKVALRECEXCL
140	{
141	/** Record core with RTLOCKVALRECEXCL_MAGIC as the magic value. */
142	RTLOCKVALRECCORE Core;
143	/** Whether it's enabled or not. */
144	bool fEnabled;
145	/** Reserved. */
146	bool afReserved[3];
147	/** Source position where the lock was taken. */
148	RTLOCKVALSRCPOS SrcPos;
149	/** The current owner thread. */
150	RTTHREAD volatile hThread;
151	/** Pointer to the lock record below us. Only accessed by the owner. */
152	R3R0PTRTYPE(PRTLOCKVALRECUNION) pDown;
153	/** Recursion count */
154	uint32_t cRecursion;
155	/** The lock sub-class. */
156	uint32_t volatile uSubClass;
157	/** The lock class. */
158	RTLOCKVALCLASS hClass;
159	/** Pointer to the lock. */
160	RTHCPTR hLock;
161	/** Pointer to the next sibling record.
162	* This is used to find the read side of a read-write lock. */
163	R3R0PTRTYPE(PRTLOCKVALRECUNION) pSibling;
164	/** The lock name.
165	* @remarks The bytes beyond 32 are for better size alignment and can be
166	* taken and used for other purposes if it becomes necessary. */
167	char szName[32 + (HC_ARCH_BITS == 32 ? 12 : 8)];
168	} RTLOCKVALRECEXCL;
169	AssertCompileSize(RTLOCKVALRECEXCL, HC_ARCH_BITS == 32 ? 0x60 : 0x80);
170	/* The pointer type is defined in iprt/types.h. */
171
172	/**
173	* For recording the one ownership share.
174	*/
175	typedef struct RTLOCKVALRECSHRDOWN
176	{
177	/** Record core with RTLOCKVALRECSHRDOWN_MAGIC as the magic value. */
178	RTLOCKVALRECCORE Core;
179	/** Recursion count */
180	uint16_t cRecursion;
181	/** Static (true) or dynamic (false) allocated record. */
182	bool fStaticAlloc;
183	/** Reserved. */
184	bool fReserved;
185	/** The current owner thread. */
186	RTTHREAD volatile hThread;
187	/** Pointer to the lock record below us. Only accessed by the owner. */
188	R3R0PTRTYPE(PRTLOCKVALRECUNION) pDown;
189	/** Pointer back to the shared record. */
190	R3R0PTRTYPE(PRTLOCKVALRECSHRD) pSharedRec;
191	#if HC_ARCH_BITS == 32
192	/** Reserved. */
193	RTHCPTR pvReserved;
194	#endif
195	/** Source position where the lock was taken. */
196	RTLOCKVALSRCPOS SrcPos;
197	} RTLOCKVALRECSHRDOWN;
198	AssertCompileSize(RTLOCKVALRECSHRDOWN, HC_ARCH_BITS == 32 ? 24 + 16 : 32 + 32);
199	/** Pointer to a RTLOCKVALRECSHRDOWN. */
200	typedef RTLOCKVALRECSHRDOWN *PRTLOCKVALRECSHRDOWN;
201
202	/**
203	* Record recording the shared ownership of a lock.
204	*
205	* This is typically part of the per-lock data structure when compiling with
206	* the lock validator.
207	*/
208	typedef struct RTLOCKVALRECSHRD
209	{
210	/** Record core with RTLOCKVALRECSHRD_MAGIC as the magic value. */
211	RTLOCKVALRECCORE Core;
212	/** The lock sub-class. */
213	uint32_t volatile uSubClass;
214	/** The lock class. */
215	RTLOCKVALCLASS hClass;
216	/** Pointer to the lock. */
217	RTHCPTR hLock;
218	/** Pointer to the next sibling record.
219	* This is used to find the write side of a read-write lock. */
220	R3R0PTRTYPE(PRTLOCKVALRECUNION) pSibling;
221
222	/** The number of entries in the table.
223	* Updated before inserting and after removal. */
224	uint32_t volatile cEntries;
225	/** The index of the last entry (approximately). */
226	uint32_t volatile iLastEntry;
227	/** The max table size. */
228	uint32_t volatile cAllocated;
229	/** Set if the table is being reallocated, clear if not.
230	* This is used together with rtLockValidatorSerializeDetectionEnter to make
231	* sure there is exactly one thread doing the reallocation and that nobody is
232	* using the table at that point. */
233	bool volatile fReallocating;
234	/** Whether it's enabled or not. */
235	bool fEnabled;
236	/** Set if event semaphore signaller, clear if read-write semaphore. */
237	bool fSignaller;
238	/** Alignment padding. */
239	bool fPadding;
240	/** Pointer to a table containing pointers to records of all the owners. */
241	R3R0PTRTYPE(PRTLOCKVALRECSHRDOWN volatile *) papOwners;
242
243	/** The lock name.
244	* @remarks The bytes beyond 32 are for better size alignment and can be
245	* taken and used for other purposes if it becomes necessary. */
246	char szName[32 + (HC_ARCH_BITS == 32 ? 8 : 8)];
247	} RTLOCKVALRECSHRD;
248	AssertCompileSize(RTLOCKVALRECSHRD, HC_ARCH_BITS == 32 ? 0x50 : 0x60);
249
250
251	/**
252	* Makes the two records siblings.
253	*
254	* @returns VINF_SUCCESS on success, VERR_SEM_LV_INVALID_PARAMETER if either of
255	* the records are invalid.
256	* @param pRec1 Record 1.
257	* @param pRec2 Record 2.
258	*/
259	RTDECL(int) RTLockValidatorRecMakeSiblings(PRTLOCKVALRECCORE pRec1, PRTLOCKVALRECCORE pRec2);
260
261	/**
262	* Initialize a lock validator record.
263	*
264	* Use RTLockValidatorRecExclDelete to deinitialize it.
265	*
266	* @param pRec The record.
267	* @param hClass The class (no reference consumed). If NIL, the
268	* no lock order validation will be performed on
269	* this lock.
270	* @param uSubClass The sub-class. This is used to define lock
271	* order inside the same class. If you don't know,
272	* then pass RTLOCKVAL_SUB_CLASS_NONE.
273	* @param hLock The lock handle.
274	* @param fEnabled Pass @c false to explicitly disable lock
275	* validation, otherwise @c true.
276	* @param pszNameFmt Name format string for the lock validator,
277	* optional (NULL). Max length is 32 bytes.
278	* @param ... Format string arguments.
279	*/
280	RTDECL(void) RTLockValidatorRecExclInit(PRTLOCKVALRECEXCL pRec, RTLOCKVALCLASS hClass, uint32_t uSubClass, void *hLock,
281	bool fEnabled, const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(6, 7);
282	/**
283	* Initialize a lock validator record.
284	*
285	* Use RTLockValidatorRecExclDelete to deinitialize it.
286	*
287	* @param pRec The record.
288	* @param hClass The class (no reference consumed). If NIL, the
289	* no lock order validation will be performed on
290	* this lock.
291	* @param uSubClass The sub-class. This is used to define lock
292	* order inside the same class. If you don't know,
293	* then pass RTLOCKVAL_SUB_CLASS_NONE.
294	* @param hLock The lock handle.
295	* @param fEnabled Pass @c false to explicitly disable lock
296	* validation, otherwise @c true.
297	* @param pszNameFmt Name format string for the lock validator,
298	* optional (NULL). Max length is 32 bytes.
299	* @param va Format string arguments.
300	*/
301	RTDECL(void) RTLockValidatorRecExclInitV(PRTLOCKVALRECEXCL pRec, RTLOCKVALCLASS hClass, uint32_t uSubClass, void *hLock,
302	bool fEnabled, const char *pszNameFmt, va_list va) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(6, 0);
303	/**
304	* Uninitialize a lock validator record previously initialized by
305	* RTLockRecValidatorInit.
306	*
307	* @param pRec The record. Must be valid.
308	*/
309	RTDECL(void) RTLockValidatorRecExclDelete(PRTLOCKVALRECEXCL pRec);
310
311	/**
312	* Create and initialize a lock validator record.
313	*
314	* Use RTLockValidatorRecExclDestroy to deinitialize and destroy the returned
315	* record.
316	*
317	* @return VINF_SUCCESS or VERR_NO_MEMORY.
318	* @param ppRec Where to return the record pointer.
319	* @param hClass The class (no reference consumed). If NIL, the
320	* no lock order validation will be performed on
321	* this lock.
322	* @param uSubClass The sub-class. This is used to define lock
323	* order inside the same class. If you don't know,
324	* then pass RTLOCKVAL_SUB_CLASS_NONE.
325	* @param hLock The lock handle.
326	* @param fEnabled Pass @c false to explicitly disable lock
327	* validation, otherwise @c true.
328	* @param pszNameFmt Name format string for the lock validator,
329	* optional (NULL). Max length is 32 bytes.
330	* @param ... Format string arguments.
331	*/
332	RTDECL(int) RTLockValidatorRecExclCreate(PRTLOCKVALRECEXCL ppRec, RTLOCKVALCLASS hClass, uint32_t uSubClass, void hLock,
333	bool fEnabled, const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(6, 7);
334
335	/**
336	* Create and initialize a lock validator record.
337	*
338	* Use RTLockValidatorRecExclDestroy to deinitialize and destroy the returned
339	* record.
340	*
341	* @return VINF_SUCCESS or VERR_NO_MEMORY.
342	* @param ppRec Where to return the record pointer.
343	* @param hClass The class (no reference consumed). If NIL, the
344	* no lock order validation will be performed on
345	* this lock.
346	* @param uSubClass The sub-class. This is used to define lock
347	* order inside the same class. If you don't know,
348	* then pass RTLOCKVAL_SUB_CLASS_NONE.
349	* @param hLock The lock handle.
350	* @param fEnabled Pass @c false to explicitly disable lock
351	* validation, otherwise @c true.
352	* @param pszNameFmt Name format string for the lock validator,
353	* optional (NULL). Max length is 32 bytes.
354	* @param va Format string arguments.
355	*/
356	RTDECL(int) RTLockValidatorRecExclCreateV(PRTLOCKVALRECEXCL ppRec, RTLOCKVALCLASS hClass, uint32_t uSubClass, void hLock,
357	bool fEnabled, const char *pszNameFmt, va_list va) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(6, 0);
358
359	/**
360	* Deinitialize and destroy a record created by RTLockValidatorRecExclCreate.
361	*
362	* @param ppRec Pointer to the record pointer. Will be set to
363	* NULL.
364	*/
365	RTDECL(void) RTLockValidatorRecExclDestroy(PRTLOCKVALRECEXCL *ppRec);
366
367	/**
368	* Sets the sub-class of the record.
369	*
370	* It is recommended to try make sure that nobody is using this class while
371	* changing the value.
372	*
373	* @returns The old sub-class. RTLOCKVAL_SUB_CLASS_INVALID is returns if the
374	* lock validator isn't compiled in or either of the parameters are
375	* invalid.
376	* @param pRec The validator record.
377	* @param uSubClass The new sub-class value.
378	*/
379	RTDECL(uint32_t) RTLockValidatorRecExclSetSubClass(PRTLOCKVALRECEXCL pRec, uint32_t uSubClass);
380
381	/**
382	* Record the specified thread as lock owner and increment the write lock count.
383	*
384	* This function is typically called after acquiring the lock. It accounts for
385	* recursions so it can be used instead of RTLockValidatorRecExclRecursion. Use
386	* RTLockValidatorRecExclReleaseOwner to reverse the effect.
387	*
388	* @param pRec The validator record.
389	* @param hThreadSelf The handle of the calling thread. If not known,
390	* pass NIL_RTTHREAD and we'll figure it out.
391	* @param pSrcPos The source position of the lock operation.
392	* @param fFirstRecursion Set if it is the first recursion, clear if not
393	* sure.
394	*/
395	RTDECL(void) RTLockValidatorRecExclSetOwner(PRTLOCKVALRECEXCL pRec, RTTHREAD hThreadSelf,
396	PCRTLOCKVALSRCPOS pSrcPos, bool fFirstRecursion);
397
398	/**
399	* Check the exit order and release (unset) the ownership.
400	*
401	* This is called by routines implementing releasing an exclusive lock,
402	* typically before getting down to the final lock releasing. Can be used for
403	* recursive releasing instead of RTLockValidatorRecExclUnwind.
404	*
405	* @retval VINF_SUCCESS on success.
406	* @retval VERR_SEM_LV_WRONG_RELEASE_ORDER if the order is wrong. Will have
407	* done all necessary whining and breakpointing before returning.
408	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
409	*
410	* @param pRec The validator record.
411	* @param fFinalRecursion Set if it's the final recursion, clear if not
412	* sure.
413	*/
414	RTDECL(int) RTLockValidatorRecExclReleaseOwner(PRTLOCKVALRECEXCL pRec, bool fFinalRecursion);
415
416	/**
417	* Clear the lock ownership and decrement the write lock count.
418	*
419	* This is only for special cases where we wish to drop lock validation
420	* recording. See RTLockValidatorRecExclCheckAndRelease.
421	*
422	* @param pRec The validator record.
423	*/
424	RTDECL(void) RTLockValidatorRecExclReleaseOwnerUnchecked(PRTLOCKVALRECEXCL pRec);
425
426	/**
427	* Checks and records a lock recursion.
428	*
429	* @retval VINF_SUCCESS on success.
430	* @retval VERR_SEM_LV_NESTED if the semaphore class forbids recursion. Gone
431	* thru the motions.
432	* @retval VERR_SEM_LV_WRONG_ORDER if the locking order is wrong. Gone thru
433	* the motions.
434	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
435	*
436	* @param pRec The validator record.
437	* @param pSrcPos The source position of the lock operation.
438	*/
439	RTDECL(int) RTLockValidatorRecExclRecursion(PRTLOCKVALRECEXCL pRec, PCRTLOCKVALSRCPOS pSrcPos);
440
441	/**
442	* Checks and records a lock unwind (releasing one recursion).
443	*
444	* This should be coupled with called to RTLockValidatorRecExclRecursion.
445	*
446	* @retval VINF_SUCCESS on success.
447	* @retval VERR_SEM_LV_WRONG_RELEASE_ORDER if the release order is wrong. Gone
448	* thru the motions.
449	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
450	*
451	* @param pRec The validator record.
452	*/
453	RTDECL(int) RTLockValidatorRecExclUnwind(PRTLOCKVALRECEXCL pRec);
454
455	/**
456	* Checks and records a mixed recursion.
457	*
458	* An example of a mixed recursion is a writer requesting read access to a
459	* SemRW.
460	*
461	* This should be coupled with called to RTLockValidatorRecExclUnwindMixed.
462	*
463	* @retval VINF_SUCCESS on success.
464	* @retval VERR_SEM_LV_NESTED if the semaphore class forbids recursion. Gone
465	* thru the motions.
466	* @retval VERR_SEM_LV_WRONG_ORDER if the locking order is wrong. Gone thru
467	* the motions.
468	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
469	*
470	* @param pRec The validator record it to accounted it to.
471	* @param pRecMixed The validator record it came in on.
472	* @param pSrcPos The source position of the lock operation.
473	*/
474	RTDECL(int) RTLockValidatorRecExclRecursionMixed(PRTLOCKVALRECEXCL pRec, PRTLOCKVALRECCORE pRecMixed, PCRTLOCKVALSRCPOS pSrcPos);
475
476	/**
477	* Checks and records the unwinding of a mixed recursion.
478	*
479	* This should be coupled with called to RTLockValidatorRecExclRecursionMixed.
480	*
481	* @retval VINF_SUCCESS on success.
482	* @retval VERR_SEM_LV_WRONG_RELEASE_ORDER if the release order is wrong. Gone
483	* thru the motions.
484	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
485	*
486	* @param pRec The validator record it was accounted to.
487	* @param pRecMixed The validator record it came in on.
488	*/
489	RTDECL(int) RTLockValidatorRecExclUnwindMixed(PRTLOCKVALRECEXCL pRec, PRTLOCKVALRECCORE pRecMixed);
490
491	/**
492	* Check the exclusive locking order.
493	*
494	* This is called by routines implementing exclusive lock acquisition.
495	*
496	* @retval VINF_SUCCESS on success.
497	* @retval VERR_SEM_LV_WRONG_ORDER if the order is wrong. Will have done all
498	* necessary whining and breakpointing before returning.
499	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
500	*
501	* @param pRec The validator record.
502	* @param hThreadSelf The handle of the calling thread. If not known,
503	* pass NIL_RTTHREAD and we'll figure it out.
504	* @param pSrcPos The source position of the lock operation.
505	* @param cMillies The timeout, in milliseconds.
506	*/
507	RTDECL(int) RTLockValidatorRecExclCheckOrder(PRTLOCKVALRECEXCL pRec, RTTHREAD hThreadSelf,
508	PCRTLOCKVALSRCPOS pSrcPos, RTMSINTERVAL cMillies);
509
510	/**
511	* Do deadlock detection before blocking on exclusive access to a lock and
512	* change the thread state.
513	*
514	* @retval VINF_SUCCESS - thread is in the specified sleep state.
515	* @retval VERR_SEM_LV_DEADLOCK if blocking would deadlock. Gone thru the
516	* motions.
517	* @retval VERR_SEM_LV_NESTED if the semaphore isn't recursive and hThread is
518	* already the owner. Gone thru the motions.
519	* @retval VERR_SEM_LV_ILLEGAL_UPGRADE if it's a deadlock on the same lock.
520	* The caller must handle any legal upgrades without invoking this
521	* function (for now).
522	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
523	*
524	* @param pRec The validator record we're blocking on.
525	* @param hThreadSelf The current thread. Shall not be NIL_RTTHREAD!
526	* @param pSrcPos The source position of the lock operation.
527	* @param fRecursiveOk Whether it's ok to recurse.
528	* @param cMillies The timeout, in milliseconds.
529	* @param enmSleepState The sleep state to enter on successful return.
530	* @param fReallySleeping Is it really going to sleep now or not. Use
531	* false before calls to other IPRT synchronization
532	* methods.
533	*/
534	RTDECL(int) RTLockValidatorRecExclCheckBlocking(PRTLOCKVALRECEXCL pRec, RTTHREAD hThreadSelf,
535	PCRTLOCKVALSRCPOS pSrcPos, bool fRecursiveOk, RTMSINTERVAL cMillies,
536	RTTHREADSTATE enmSleepState, bool fReallySleeping);
537
538	/**
539	* RTLockValidatorRecExclCheckOrder and RTLockValidatorRecExclCheckBlocking
540	* baked into one call.
541	*
542	* @returns Any of the statuses returned by the two APIs.
543	* @param pRec The validator record.
544	* @param hThreadSelf The current thread. Shall not be NIL_RTTHREAD!
545	* @param pSrcPos The source position of the lock operation.
546	* @param fRecursiveOk Whether it's ok to recurse.
547	* @param cMillies The timeout, in milliseconds.
548	* @param enmSleepState The sleep state to enter on successful return.
549	* @param fReallySleeping Is it really going to sleep now or not. Use
550	* false before calls to other IPRT synchronization
551	* methods.
552	*/
553	RTDECL(int) RTLockValidatorRecExclCheckOrderAndBlocking(PRTLOCKVALRECEXCL pRec, RTTHREAD hThreadSelf,
554	PCRTLOCKVALSRCPOS pSrcPos, bool fRecursiveOk, RTMSINTERVAL cMillies,
555	RTTHREADSTATE enmSleepState, bool fReallySleeping);
556
557	/**
558	* Initialize a lock validator record for a shared lock.
559	*
560	* Use RTLockValidatorRecSharedDelete to deinitialize it.
561	*
562	* @param pRec The shared lock record.
563	* @param hClass The class (no reference consumed). If NIL, the
564	* no lock order validation will be performed on
565	* this lock.
566	* @param uSubClass The sub-class. This is used to define lock
567	* order inside the same class. If you don't know,
568	* then pass RTLOCKVAL_SUB_CLASS_NONE.
569	* @param hLock The lock handle.
570	* @param fSignaller Set if event semaphore signaller logic should be
571	* applied to this record, clear if read-write
572	* semaphore logic should be used.
573	* @param fEnabled Pass @c false to explicitly disable lock
574	* validation, otherwise @c true.
575	* @param pszNameFmt Name format string for the lock validator,
576	* optional (NULL). Max length is 32 bytes.
577	* @param ... Format string arguments.
578	*/
579	RTDECL(void) RTLockValidatorRecSharedInit(PRTLOCKVALRECSHRD pRec, RTLOCKVALCLASS hClass, uint32_t uSubClass,
580	void *hLock, bool fSignaller, bool fEnabled,
581	const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(7, 8);
582
583	/**
584	* Initialize a lock validator record for a shared lock.
585	*
586	* Use RTLockValidatorRecSharedDelete to deinitialize it.
587	*
588	* @param pRec The shared lock record.
589	* @param hClass The class (no reference consumed). If NIL, the
590	* no lock order validation will be performed on
591	* this lock.
592	* @param uSubClass The sub-class. This is used to define lock
593	* order inside the same class. If you don't know,
594	* then pass RTLOCKVAL_SUB_CLASS_NONE.
595	* @param hLock The lock handle.
596	* @param fSignaller Set if event semaphore signaller logic should be
597	* applied to this record, clear if read-write
598	* semaphore logic should be used.
599	* @param fEnabled Pass @c false to explicitly disable lock
600	* validation, otherwise @c true.
601	* @param pszNameFmt Name format string for the lock validator,
602	* optional (NULL). Max length is 32 bytes.
603	* @param va Format string arguments.
604	*/
605	RTDECL(void) RTLockValidatorRecSharedInitV(PRTLOCKVALRECSHRD pRec, RTLOCKVALCLASS hClass, uint32_t uSubClass,
606	void *hLock, bool fSignaller, bool fEnabled,
607	const char *pszNameFmt, va_list va) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(7, 0);
608
609	/**
610	* Uninitialize a lock validator record previously initialized by
611	* RTLockValidatorRecSharedInit.
612	*
613	* @param pRec The shared lock record. Must be valid.
614	*/
615	RTDECL(void) RTLockValidatorRecSharedDelete(PRTLOCKVALRECSHRD pRec);
616
617	/**
618	* Create and initialize a lock validator record for a shared lock.
619	*
620	* Use RTLockValidatorRecSharedDestroy to deinitialize and destroy the returned
621	* record.
622	*
623	* @returns IPRT status code.
624	* @param ppRec Where to return the record pointer.
625	* @param hClass The class (no reference consumed). If NIL, the
626	* no lock order validation will be performed on
627	* this lock.
628	* @param uSubClass The sub-class. This is used to define lock
629	* order inside the same class. If you don't know,
630	* then pass RTLOCKVAL_SUB_CLASS_NONE.
631	* @param pvLock The lock handle or address.
632	* @param fSignaller Set if event semaphore signaller logic should be
633	* applied to this record, clear if read-write
634	* semaphore logic should be used.
635	* @param fEnabled Pass @c false to explicitly disable lock
636	* validation, otherwise @c true.
637	* @param pszNameFmt Name format string for the lock validator,
638	* optional (NULL). Max length is 32 bytes.
639	* @param ... Format string arguments.
640	*/
641	RTDECL(int) RTLockValidatorRecSharedCreate(PRTLOCKVALRECSHRD *ppRec, RTLOCKVALCLASS hClass, uint32_t uSubClass,
642	void *pvLock, bool fSignaller, bool fEnabled,
643	const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(7, 8);
644
645	/**
646	* Create and initialize a lock validator record for a shared lock.
647	*
648	* Use RTLockValidatorRecSharedDestroy to deinitialize and destroy the returned
649	* record.
650	*
651	* @returns IPRT status code.
652	* @param ppRec Where to return the record pointer.
653	* @param hClass The class (no reference consumed). If NIL, the
654	* no lock order validation will be performed on
655	* this lock.
656	* @param uSubClass The sub-class. This is used to define lock
657	* order inside the same class. If you don't know,
658	* then pass RTLOCKVAL_SUB_CLASS_NONE.
659	* @param pvLock The lock handle or address.
660	* @param fSignaller Set if event semaphore signaller logic should be
661	* applied to this record, clear if read-write
662	* semaphore logic should be used.
663	* @param fEnabled Pass @c false to explicitly disable lock
664	* validation, otherwise @c true.
665	* @param pszNameFmt Name format string for the lock validator,
666	* optional (NULL). Max length is 32 bytes.
667	* @param va Format string arguments.
668	*/
669	RTDECL(int) RTLockValidatorRecSharedCreateV(PRTLOCKVALRECSHRD *ppRec, RTLOCKVALCLASS hClass, uint32_t uSubClass,
670	void *pvLock, bool fSignaller, bool fEnabled,
671	const char *pszNameFmt, va_list va) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(7, 0);
672
673	/**
674	* Deinitialize and destroy a record created by RTLockValidatorRecSharedCreate.
675	*
676	* @param ppRec Pointer to the record pointer. Will be set to
677	* NULL.
678	*/
679	RTDECL(void) RTLockValidatorRecSharedDestroy(PRTLOCKVALRECSHRD *ppRec);
680
681	/**
682	* Sets the sub-class of the record.
683	*
684	* It is recommended to try make sure that nobody is using this class while
685	* changing the value.
686	*
687	* @returns The old sub-class. RTLOCKVAL_SUB_CLASS_INVALID is returns if the
688	* lock validator isn't compiled in or either of the parameters are
689	* invalid.
690	* @param pRec The validator record.
691	* @param uSubClass The new sub-class value.
692	*/
693	RTDECL(uint32_t) RTLockValidatorRecSharedSetSubClass(PRTLOCKVALRECSHRD pRec, uint32_t uSubClass);
694
695	/**
696	* Check the shared locking order.
697	*
698	* This is called by routines implementing shared lock acquisition.
699	*
700	* @retval VINF_SUCCESS on success.
701	* @retval VERR_SEM_LV_WRONG_ORDER if the order is wrong. Will have done all
702	* necessary whining and breakpointing before returning.
703	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
704	*
705	* @param pRec The validator record.
706	* @param hThreadSelf The handle of the calling thread. If not known,
707	* pass NIL_RTTHREAD and we'll figure it out.
708	* @param pSrcPos The source position of the lock operation.
709	* @param cMillies Intended sleep time in milliseconds.
710	*/
711	RTDECL(int) RTLockValidatorRecSharedCheckOrder(PRTLOCKVALRECSHRD pRec, RTTHREAD hThreadSelf,
712	PCRTLOCKVALSRCPOS pSrcPos, RTMSINTERVAL cMillies);
713
714	/**
715	* Do deadlock detection before blocking on shared access to a lock and change
716	* the thread state.
717	*
718	* @retval VINF_SUCCESS - thread is in the specified sleep state.
719	* @retval VERR_SEM_LV_DEADLOCK if blocking would deadlock. Gone thru the
720	* motions.
721	* @retval VERR_SEM_LV_NESTED if the semaphore isn't recursive and hThread is
722	* already the owner. Gone thru the motions.
723	* @retval VERR_SEM_LV_ILLEGAL_UPGRADE if it's a deadlock on the same lock.
724	* The caller must handle any legal upgrades without invoking this
725	* function (for now).
726	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
727	*
728	* @param pRec The validator record we're blocking on.
729	* @param hThreadSelf The current thread. Shall not be NIL_RTTHREAD!
730	* @param pSrcPos The source position of the lock operation.
731	* @param fRecursiveOk Whether it's ok to recurse.
732	* @param cMillies Intended sleep time in milliseconds.
733	* @param enmSleepState The sleep state to enter on successful return.
734	* @param fReallySleeping Is it really going to sleep now or not. Use
735	* false before calls to other IPRT synchronization
736	* methods.
737	*/
738	RTDECL(int) RTLockValidatorRecSharedCheckBlocking(PRTLOCKVALRECSHRD pRec, RTTHREAD hThreadSelf,
739	PCRTLOCKVALSRCPOS pSrcPos, bool fRecursiveOk, RTMSINTERVAL cMillies,
740	RTTHREADSTATE enmSleepState, bool fReallySleeping);
741
742	/**
743	* RTLockValidatorRecSharedCheckOrder and RTLockValidatorRecSharedCheckBlocking
744	* baked into one call.
745	*
746	* @returns Any of the statuses returned by the two APIs.
747	* @param pRec The validator record.
748	* @param hThreadSelf The current thread. Shall not be NIL_RTTHREAD!
749	* @param pSrcPos The source position of the lock operation.
750	* @param fRecursiveOk Whether it's ok to recurse.
751	* @param cMillies Intended sleep time in milliseconds.
752	* @param enmSleepState The sleep state to enter on successful return.
753	* @param fReallySleeping Is it really going to sleep now or not. Use
754	* false before calls to other IPRT synchronization
755	* methods.
756	*/
757	RTDECL(int) RTLockValidatorRecSharedCheckOrderAndBlocking(PRTLOCKVALRECSHRD pRec, RTTHREAD hThreadSelf,
758	PCRTLOCKVALSRCPOS pSrcPos, bool fRecursiveOk, RTMSINTERVAL cMillies,
759	RTTHREADSTATE enmSleepState, bool fReallySleeping);
760
761	/**
762	* Removes all current owners and makes hThread the only owner.
763	*
764	* @param pRec The validator record.
765	* @param hThread The thread handle of the owner. NIL_RTTHREAD is
766	* an alias for the current thread.
767	* @param pSrcPos The source position of the lock operation.
768	*/
769	RTDECL(void) RTLockValidatorRecSharedResetOwner(PRTLOCKVALRECSHRD pRec, RTTHREAD hThread, PCRTLOCKVALSRCPOS pSrcPos);
770
771	/**
772	* Adds an owner to a shared locking record.
773	*
774	* Takes recursion into account. This function is typically called after
775	* acquiring the lock in shared mode.
776	*
777	* @param pRec The validator record.
778	* @param hThread The thread handle of the owner. NIL_RTTHREAD is
779	* an alias for the current thread.
780	* @param pSrcPos The source position of the lock operation.
781	*/
782	RTDECL(void) RTLockValidatorRecSharedAddOwner(PRTLOCKVALRECSHRD pRec, RTTHREAD hThread, PCRTLOCKVALSRCPOS pSrcPos);
783
784	/**
785	* Removes an owner from a shared locking record.
786	*
787	* Takes recursion into account. This function is typically called before
788	* releasing the lock.
789	*
790	* @param pRec The validator record.
791	* @param hThread The thread handle of the owner. NIL_RTTHREAD is
792	* an alias for the current thread.
793	*/
794	RTDECL(void) RTLockValidatorRecSharedRemoveOwner(PRTLOCKVALRECSHRD pRec, RTTHREAD hThread);
795
796	/**
797	* Checks if the specified thread is one of the owners.
798	*
799	* @returns true if it is, false if not.
800	*
801	* @param pRec The validator record.
802	* @param hThread The thread handle of the owner. NIL_RTTHREAD is
803	* an alias for the current thread.
804	*/
805	RTDECL(bool) RTLockValidatorRecSharedIsOwner(PRTLOCKVALRECSHRD pRec, RTTHREAD hThread);
806
807	/**
808	* Check the exit order and release (unset) the shared ownership.
809	*
810	* This is called by routines implementing releasing the read/write lock.
811	*
812	* @retval VINF_SUCCESS on success.
813	* @retval VERR_SEM_LV_WRONG_RELEASE_ORDER if the order is wrong. Will have
814	* done all necessary whining and breakpointing before returning.
815	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
816	*
817	* @param pRec The validator record.
818	* @param hThreadSelf The handle of the calling thread. NIL_RTTHREAD
819	* is an alias for the current thread.
820	*/
821	RTDECL(int) RTLockValidatorRecSharedCheckAndRelease(PRTLOCKVALRECSHRD pRec, RTTHREAD hThreadSelf);
822
823	/**
824	* Check the signaller of an event.
825	*
826	* This is called by routines implementing releasing the event semaphore (both
827	* kinds).
828	*
829	* @retval VINF_SUCCESS on success.
830	* @retval VERR_SEM_LV_NOT_SIGNALLER if the thread is not in the record. Will
831	* have done all necessary whining and breakpointing before returning.
832	* @retval VERR_SEM_LV_INVALID_PARAMETER if the input is invalid.
833	*
834	* @param pRec The validator record.
835	* @param hThreadSelf The handle of the calling thread. NIL_RTTHREAD
836	* is an alias for the current thread.
837	*/
838	RTDECL(int) RTLockValidatorRecSharedCheckSignaller(PRTLOCKVALRECSHRD pRec, RTTHREAD hThreadSelf);
839
840	/**
841	* Gets the number of write locks and critical sections the specified
842	* thread owns.
843	*
844	* This number does not include any nested lock/critect entries.
845	*
846	* Note that it probably will return 0 for non-strict builds since
847	* release builds doesn't do unnecessary diagnostic counting like this.
848	*
849	* @returns Number of locks on success (0+) and VERR_INVALID_HANDLER on failure
850	* @param Thread The thread we're inquiring about.
851	* @remarks Will only work for strict builds.
852	*/
853	RTDECL(int32_t) RTLockValidatorWriteLockGetCount(RTTHREAD Thread);
854
855	/**
856	* Works the THREADINT::cWriteLocks member, mostly internal.
857	*
858	* @param Thread The current thread.
859	*/
860	RTDECL(void) RTLockValidatorWriteLockInc(RTTHREAD Thread);
861
862	/**
863	* Works the THREADINT::cWriteLocks member, mostly internal.
864	*
865	* @param Thread The current thread.
866	*/
867	RTDECL(void) RTLockValidatorWriteLockDec(RTTHREAD Thread);
868
869	/**
870	* Gets the number of read locks the specified thread owns.
871	*
872	* Note that nesting read lock entry will be included in the
873	* total sum. And that it probably will return 0 for non-strict
874	* builds since release builds doesn't do unnecessary diagnostic
875	* counting like this.
876	*
877	* @returns Number of read locks on success (0+) and VERR_INVALID_HANDLER on failure
878	* @param Thread The thread we're inquiring about.
879	*/
880	RTDECL(int32_t) RTLockValidatorReadLockGetCount(RTTHREAD Thread);
881
882	/**
883	* Works the THREADINT::cReadLocks member.
884	*
885	* @param Thread The current thread.
886	*/
887	RTDECL(void) RTLockValidatorReadLockInc(RTTHREAD Thread);
888
889	/**
890	* Works the THREADINT::cReadLocks member.
891	*
892	* @param Thread The current thread.
893	*/
894	RTDECL(void) RTLockValidatorReadLockDec(RTTHREAD Thread);
895
896	/**
897	* Query which lock the specified thread is waiting on.
898	*
899	* @returns The lock handle value or NULL.
900	* @param hThread The thread in question.
901	*/
902	RTDECL(void *) RTLockValidatorQueryBlocking(RTTHREAD hThread);
903
904	/**
905	* Checks if the thread is running in the lock validator after it has entered a
906	* block state.
907	*
908	* @returns true if it is, false if it isn't.
909	* @param hThread The thread in question.
910	*/
911	RTDECL(bool) RTLockValidatorIsBlockedThreadInValidator(RTTHREAD hThread);
912
913	/**
914	* Checks if the calling thread is holding a lock in the specified class.
915	*
916	* @returns true if it holds a lock in the specific class, false if it
917	* doesn't.
918	*
919	* @param hCurrentThread The current thread. Pass NIL_RTTHREAD if you're
920	* lazy.
921	* @param hClass The class.
922	*/
923	RTDECL(bool) RTLockValidatorHoldsLocksInClass(RTTHREAD hCurrentThread, RTLOCKVALCLASS hClass);
924
925	/**
926	* Checks if the calling thread is holding a lock in the specified sub-class.
927	*
928	* @returns true if it holds a lock in the specific sub-class, false if it
929	* doesn't.
930	*
931	* @param hCurrentThread The current thread. Pass NIL_RTTHREAD if you're
932	* lazy.
933	* @param hClass The class.
934	* @param uSubClass The new sub-class value.
935	*/
936	RTDECL(bool) RTLockValidatorHoldsLocksInSubClass(RTTHREAD hCurrentThread, RTLOCKVALCLASS hClass, uint32_t uSubClass);
937
938
939
940	/**
941	* Creates a new lock validator class, all properties specified.
942	*
943	* @returns IPRT status code
944	* @param phClass Where to return the class handle.
945	* @param pSrcPos The source position of the create call.
946	* @param fAutodidact Whether the class should be allowed to teach
947	* itself new locking order rules (true), or if the
948	* user will teach it all it needs to know (false).
949	* @param fRecursionOk Whether to allow lock recursion or not.
950	* @param fStrictReleaseOrder Enforce strict lock release order or not.
951	* @param cMsMinDeadlock Used to raise the sleep interval at which
952	* deadlock detection kicks in. Minimum is 1 ms,
953	* while RT_INDEFINITE_WAIT will disable it.
954	* @param cMsMinOrder Used to raise the sleep interval at which lock
955	* order validation kicks in. Minimum is 1 ms,
956	* while RT_INDEFINITE_WAIT will disable it.
957	* @param pszNameFmt Class name format string, optional (NULL). Max
958	* length is 32 bytes.
959	* @param ... Format string arguments.
960	*
961	* @remarks The properties can be modified after creation by the
962	* RTLockValidatorClassSet* methods.
963	*/
964	RTDECL(int) RTLockValidatorClassCreateEx(PRTLOCKVALCLASS phClass, PCRTLOCKVALSRCPOS pSrcPos,
965	bool fAutodidact, bool fRecursionOk, bool fStrictReleaseOrder,
966	RTMSINTERVAL cMsMinDeadlock, RTMSINTERVAL cMsMinOrder,
967	const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(8, 9);
968
969	/**
970	* Creates a new lock validator class, all properties specified.
971	*
972	* @returns IPRT status code
973	* @param phClass Where to return the class handle.
974	* @param pSrcPos The source position of the create call.
975	* @param fAutodidact Whether the class should be allowed to teach
976	* itself new locking order rules (true), or if the
977	* user will teach it all it needs to know (false).
978	* @param fRecursionOk Whether to allow lock recursion or not.
979	* @param fStrictReleaseOrder Enforce strict lock release order or not.
980	* @param cMsMinDeadlock Used to raise the sleep interval at which
981	* deadlock detection kicks in. Minimum is 1 ms,
982	* while RT_INDEFINITE_WAIT will disable it.
983	* @param cMsMinOrder Used to raise the sleep interval at which lock
984	* order validation kicks in. Minimum is 1 ms,
985	* while RT_INDEFINITE_WAIT will disable it.
986	* @param pszNameFmt Class name format string, optional (NULL). Max
987	* length is 32 bytes.
988	* @param va Format string arguments.
989	*
990	* @remarks The properties can be modified after creation by the
991	* RTLockValidatorClassSet* methods.
992	*/
993	RTDECL(int) RTLockValidatorClassCreateExV(PRTLOCKVALCLASS phClass, PCRTLOCKVALSRCPOS pSrcPos,
994	bool fAutodidact, bool fRecursionOk, bool fStrictReleaseOrder,
995	RTMSINTERVAL cMsMinDeadlock, RTMSINTERVAL cMsMinOrder,
996	const char *pszNameFmt, va_list va) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(8, 0);
997
998	/**
999	* Creates a new lock validator class.
1000	*
1001	* @returns IPRT status code
1002	* @param phClass Where to return the class handle.
1003	* @param fAutodidact Whether the class should be allowed to teach
1004	* itself new locking order rules (true), or if the
1005	* user will teach it all it needs to know (false).
1006	* @param SRC_POS The source position where call is being made from.
1007	* Use RT_SRC_POS when possible. Optional.
1008	* @param pszNameFmt Class name format string, optional (NULL). Max
1009	* length is 32 bytes.
1010	* @param ... Format string arguments.
1011	*/
1012	RTDECL(int) RTLockValidatorClassCreate(PRTLOCKVALCLASS phClass, bool fAutodidact, RT_SRC_POS_DECL,
1013	const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(6, 7);
1014
1015	/**
1016	* Creates a new lock validator class with a reference that is consumed by the
1017	* first call to RTLockValidatorClassRetain.
1018	*
1019	* This is tailored for use in the parameter list of a semaphore constructor.
1020	*
1021	* @returns Class handle with a reference that is automatically consumed by the
1022	* first retainer. NIL_RTLOCKVALCLASS if we run into trouble.
1023	*
1024	* @param SRC_POS The source position where call is being made from.
1025	* Use RT_SRC_POS when possible. Optional.
1026	* @param pszNameFmt Class name format string, optional (NULL). Max
1027	* length is 32 bytes.
1028	* @param ... Format string arguments.
1029	*/
1030	RTDECL(RTLOCKVALCLASS) RTLockValidatorClassCreateUnique(RT_SRC_POS_DECL,
1031	const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(4, 5);
1032
1033	/**
1034	* Finds a class for the specified source position.
1035	*
1036	* @returns A handle to the class (not retained!) or NIL_RTLOCKVALCLASS.
1037	* @param pSrcPos The source position.
1038	*/
1039	RTDECL(RTLOCKVALCLASS) RTLockValidatorClassFindForSrcPos(PRTLOCKVALSRCPOS pSrcPos);
1040
1041	/**
1042	* Finds or creates a class given the source position.
1043	*
1044	* @returns Class handle (not retained!) or NIL_RTLOCKVALCLASS.
1045	* @param SRC_POS The source position where call is being made from.
1046	* Use RT_SRC_POS when possible. Optional.
1047	* @param pszNameFmt Class name format string, optional (NULL). Max
1048	* length is 32 bytes.
1049	* @param ... Format string arguments.
1050	*/
1051	RTDECL(RTLOCKVALCLASS) RTLockValidatorClassForSrcPos(RT_SRC_POS_DECL,
1052	const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR_MAYBE_NULL(4, 5);
1053
1054	/**
1055	* Retains a reference to a lock validator class.
1056	*
1057	* @returns New reference count; UINT32_MAX if the handle is invalid.
1058	* @param hClass Handle to the class.
1059	*/
1060	RTDECL(uint32_t) RTLockValidatorClassRetain(RTLOCKVALCLASS hClass);
1061
1062	/**
1063	* Releases a reference to a lock validator class.
1064	*
1065	* @returns New reference count. 0 if hClass is NIL_RTLOCKVALCLASS. UINT32_MAX
1066	* if the handle is invalid.
1067	* @param hClass Handle to the class.
1068	*/
1069	RTDECL(uint32_t) RTLockValidatorClassRelease(RTLOCKVALCLASS hClass);
1070
1071	/**
1072	* Teaches the class @a hClass that locks in the class @a hPriorClass can be
1073	* held when taking a lock of class @a hClass
1074	*
1075	* @returns IPRT status.
1076	* @param hClass Handle to the pupil class.
1077	* @param hPriorClass Handle to the class that can be held prior to
1078	* taking a lock in the pupil class. (No reference
1079	* is consumed.)
1080	*/
1081	RTDECL(int) RTLockValidatorClassAddPriorClass(RTLOCKVALCLASS hClass, RTLOCKVALCLASS hPriorClass);
1082
1083	/**
1084	* Enables or disables the strict release order enforcing.
1085	*
1086	* @returns IPRT status.
1087	* @param hClass Handle to the class to change.
1088	* @param fEnabled Enable it (true) or disable it (false).
1089	*/
1090	RTDECL(int) RTLockValidatorClassEnforceStrictReleaseOrder(RTLOCKVALCLASS hClass, bool fEnabled);
1091
1092	/**
1093	* Enables / disables the lock validator for new locks.
1094	*
1095	* @returns The old setting.
1096	* @param fEnabled The new setting.
1097	*/
1098	RTDECL(bool) RTLockValidatorSetEnabled(bool fEnabled);
1099
1100	/**
1101	* Is the lock validator enabled?
1102	*
1103	* @returns True if enabled, false if not.
1104	*/
1105	RTDECL(bool) RTLockValidatorIsEnabled(void);
1106
1107	/**
1108	* Controls whether the lock validator should be quiet or noisy (default).
1109	*
1110	* @returns The old setting.
1111	* @param fQuiet The new setting.
1112	*/
1113	RTDECL(bool) RTLockValidatorSetQuiet(bool fQuiet);
1114
1115	/**
1116	* Is the lock validator quiet or noisy?
1117	*
1118	* @returns True if it is quiet, false if noisy.
1119	*/
1120	RTDECL(bool) RTLockValidatorIsQuiet(void);
1121
1122	/**
1123	* Makes the lock validator panic (default) or not.
1124	*
1125	* @returns The old setting.
1126	* @param fPanic The new setting.
1127	*/
1128	RTDECL(bool) RTLockValidatorSetMayPanic(bool fPanic);
1129
1130	/**
1131	* Can the lock validator cause panic.
1132	*
1133	* @returns True if it can, false if not.
1134	*/
1135	RTDECL(bool) RTLockValidatorMayPanic(void);
1136
1137
1138	RT_C_DECLS_END
1139
1140	/** @} */
1141
1142	#endif /* !IPRT_INCLUDED_lockvalidator_h */
1143

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/include/iprt/lockvalidator.h@ 104212

Download in other formats: