tstRTSemRW.cpp@ 106061

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1	/* $Id: tstRTSemRW.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* IPRT Testcase - Reader/Writer Semaphore.
4	*/
5
6	/*
7	* Copyright (C) 2009-2024 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* The contents of this file may alternatively be used under the terms
26	* of the Common Development and Distribution License Version 1.0
27	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28	* in the VirtualBox distribution, in which case the provisions of the
29	* CDDL are applicable instead of those of the GPL.
30	*
31	* You may elect to license modified versions of this file under the
32	* terms and conditions of either the GPL or the CDDL or both.
33	*
34	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35	*/
36
37
38	/*********************************************************************************************************************************
39	* Header Files *
40	*********************************************************************************************************************************/
41	#include <iprt/semaphore.h>
42
43	#include <iprt/asm.h>
44	#include <iprt/assert.h>
45	#include <iprt/err.h>
46	#include <iprt/initterm.h>
47	#include <iprt/lockvalidator.h>
48	#include <iprt/mp.h>
49	#include <iprt/rand.h>
50	#include <iprt/string.h>
51	#include <iprt/stream.h>
52	#include <iprt/test.h>
53	#include <iprt/time.h>
54	#include <iprt/thread.h>
55
56
57	/*********************************************************************************************************************************
58	* Global Variables *
59	*********************************************************************************************************************************/
60	static RTTEST g_hTest;
61	static RTSEMRW g_hSemRW = NIL_RTSEMRW;
62	static bool volatile g_fTerminate;
63	static bool g_fYield;
64	static bool g_fQuiet;
65	static unsigned g_uWritePercent;
66	static uint32_t volatile g_cConcurrentWriters;
67	static uint32_t volatile g_cConcurrentReaders;
68
69
70	static DECLCALLBACK(int) Test4Thread(RTTHREAD ThreadSelf, void *pvUser)
71	{
72	/* Use randomization to get a little more variation of the sync pattern.
73	We use a pseudo random generator here so that we don't end up testing
74	the speed of the /dev/urandom implementation, but rather the read-write
75	semaphores. */
76	int rc;
77	RTRAND hRand;
78	RTTEST_CHECK_RC_OK_RET(g_hTest, rc = RTRandAdvCreateParkMiller(&hRand), rc);
79	RTTEST_CHECK_RC_OK_RET(g_hTest, rc = RTRandAdvSeed(hRand, (uintptr_t)ThreadSelf), rc);
80	unsigned c100 = RTRandAdvU32Ex(hRand, 0, 99);
81
82	uint64_t pcItr = (uint64_t )pvUser;
83	bool fWrite;
84	for (;;)
85	{
86	unsigned readrec = RTRandAdvU32Ex(hRand, 0, 3);
87	unsigned writerec = RTRandAdvU32Ex(hRand, 0, 3);
88	/* Don't overdo recursion testing. */
89	if (readrec > 1)
90	readrec--;
91	if (writerec > 1)
92	writerec--;
93
94	fWrite = (c100 < g_uWritePercent);
95	if (fWrite)
96	{
97	for (unsigned i = 0; i <= writerec; i++)
98	{
99	rc = RTSemRWRequestWriteNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
100	if (RT_FAILURE(rc))
101	{
102	RTTestFailed(g_hTest, "Write recursion %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
103	break;
104	}
105	}
106	if (RT_FAILURE(rc))
107	break;
108	if (ASMAtomicIncU32(&g_cConcurrentWriters) != 1)
109	{
110	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s after write locking it",
111	g_cConcurrentWriters, RTThreadSelfName());
112	break;
113	}
114	if (g_cConcurrentReaders != 0)
115	{
116	RTTestFailed(g_hTest, "g_cConcurrentReaders=%u on %s after write locking it",
117	g_cConcurrentReaders, RTThreadSelfName());
118	break;
119	}
120	}
121	else
122	{
123	rc = RTSemRWRequestReadNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
124	if (RT_FAILURE(rc))
125	{
126	RTTestFailed(g_hTest, "Read locking on %s failed with rc=%Rrc", RTThreadSelfName(), rc);
127	break;
128	}
129	ASMAtomicIncU32(&g_cConcurrentReaders);
130	if (g_cConcurrentWriters != 0)
131	{
132	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s after read locking it",
133	g_cConcurrentWriters, RTThreadSelfName());
134	break;
135	}
136	}
137	for (unsigned i = 0; i < readrec; i++)
138	{
139	rc = RTSemRWRequestReadNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
140	if (RT_FAILURE(rc))
141	{
142	RTTestFailed(g_hTest, "Read recursion %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
143	break;
144	}
145	}
146	if (RT_FAILURE(rc))
147	break;
148
149	/*
150	* Check for fairness: The values of the threads should not differ too much
151	*/
152	(*pcItr)++;
153
154	/*
155	* Check for correctness: Give other threads a chance. If the implementation is
156	* correct, no other thread will be able to enter this lock now.
157	*/
158	if (g_fYield)
159	RTThreadYield();
160
161	for (unsigned i = 0; i < readrec; i++)
162	{
163	rc = RTSemRWReleaseRead(g_hSemRW);
164	if (RT_FAILURE(rc))
165	{
166	RTTestFailed(g_hTest, "Read release %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
167	break;
168	}
169	}
170	if (RT_FAILURE(rc))
171	break;
172
173	if (fWrite)
174	{
175	if (ASMAtomicDecU32(&g_cConcurrentWriters) != 0)
176	{
177	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s before write release",
178	g_cConcurrentWriters, RTThreadSelfName());
179	break;
180	}
181	if (g_cConcurrentReaders != 0)
182	{
183	RTTestFailed(g_hTest, "g_cConcurrentReaders=%u on %s before write release",
184	g_cConcurrentReaders, RTThreadSelfName());
185	break;
186	}
187	for (unsigned i = 0; i <= writerec; i++)
188	{
189	rc = RTSemRWReleaseWrite(g_hSemRW);
190	if (RT_FAILURE(rc))
191	{
192	RTTestFailed(g_hTest, "Write release %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
193	break;
194	}
195	}
196	}
197	else
198	{
199	if (g_cConcurrentWriters != 0)
200	{
201	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s before read release",
202	g_cConcurrentWriters, RTThreadSelfName());
203	break;
204	}
205	ASMAtomicDecU32(&g_cConcurrentReaders);
206	rc = RTSemRWReleaseRead(g_hSemRW);
207	if (RT_FAILURE(rc))
208	{
209	RTTestFailed(g_hTest, "Read release on %s failed with rc=%Rrc", RTThreadSelfName(), rc);
210	break;
211	}
212	}
213
214	if (g_fTerminate)
215	break;
216
217	c100++;
218	c100 %= 100;
219	}
220	if (!g_fQuiet)
221	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "Thread %s exited with %lld\n", RTThreadSelfName(), *pcItr);
222	RTRandAdvDestroy(hRand);
223	return VINF_SUCCESS;
224	}
225
226
227	static void Test4(unsigned cThreads, unsigned cSeconds, unsigned uWritePercent, bool fYield, bool fQuiet)
228	{
229	unsigned i;
230	uint64_t acIterations[32];
231	RTTHREAD aThreads[RT_ELEMENTS(acIterations)];
232	AssertRelease(cThreads <= RT_ELEMENTS(acIterations));
233
234	RTTestSubF(g_hTest, "Test4 - %u threads, %u sec, %u%% writes, %syielding",
235	cThreads, cSeconds, uWritePercent, fYield ? "" : "non-");
236
237	/*
238	* Init globals.
239	*/
240	g_fYield = fYield;
241	g_fQuiet = fQuiet;
242	g_fTerminate = false;
243	g_uWritePercent = uWritePercent;
244	g_cConcurrentWriters = 0;
245	g_cConcurrentReaders = 0;
246
247	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&g_hSemRW), VINF_SUCCESS);
248
249	/*
250	* Create the threads and let them block on the semrw.
251	*/
252	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWRequestWrite(g_hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
253
254	for (i = 0; i < cThreads; i++)
255	{
256	acIterations[i] = 0;
257	RTTEST_CHECK_RC_RETV(g_hTest, RTThreadCreateF(&aThreads[i], Test4Thread, &acIterations[i], 0,
258	RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE,
259	"test-%u", i), VINF_SUCCESS);
260	}
261
262	/*
263	* Do the test run.
264	*/
265	uint32_t cErrorsBefore = RTTestErrorCount(g_hTest);
266	uint64_t u64StartTS = RTTimeNanoTS();
267	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(g_hSemRW), VINF_SUCCESS);
268	RTThreadSleep(cSeconds * 1000);
269	ASMAtomicWriteBool(&g_fTerminate, true);
270	uint64_t ElapsedNS = RTTimeNanoTS() - u64StartTS;
271
272	/*
273	* Clean up the threads and semaphore.
274	*/
275	for (i = 0; i < cThreads; i++)
276	RTTEST_CHECK_RC(g_hTest, RTThreadWait(aThreads[i], 5000, NULL), VINF_SUCCESS);
277
278	RTTEST_CHECK_MSG(g_hTest, g_cConcurrentWriters == 0, (g_hTest, "g_cConcurrentWriters=%u at end of test\n", g_cConcurrentWriters));
279	RTTEST_CHECK_MSG(g_hTest, g_cConcurrentReaders == 0, (g_hTest, "g_cConcurrentReaders=%u at end of test\n", g_cConcurrentReaders));
280
281	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(g_hSemRW), VINF_SUCCESS);
282	g_hSemRW = NIL_RTSEMRW;
283
284	if (RTTestErrorCount(g_hTest) != cErrorsBefore)
285	RTThreadSleep(100);
286
287	/*
288	* Collect and display the results.
289	*/
290	uint64_t cItrTotal = acIterations[0];
291	for (i = 1; i < cThreads; i++)
292	cItrTotal += acIterations[i];
293
294	uint64_t cItrNormal = cItrTotal / cThreads;
295	uint64_t cItrMinOK = cItrNormal / 20; /* 5% */
296	uint64_t cItrMaxDeviation = 0;
297	for (i = 0; i < cThreads; i++)
298	{
299	uint64_t cItrDelta = RT_ABS((int64_t)(acIterations[i] - cItrNormal));
300	if (acIterations[i] < cItrMinOK)
301	RTTestFailed(g_hTest, "Thread %u did less than 5%% of the iterations - %llu (it) vs. %llu (5%%) - %llu%%\n",
302	i, acIterations[i], cItrMinOK, cItrDelta * 100 / cItrNormal);
303	else if (cItrDelta > cItrNormal / 2)
304	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS,
305	"Warning! Thread %u deviates by more than 50%% - %llu (it) vs. %llu (avg) - %llu%%\n",
306	i, acIterations[i], cItrNormal, cItrDelta * 100 / cItrNormal);
307	if (cItrDelta > cItrMaxDeviation)
308	cItrMaxDeviation = cItrDelta;
309
310	}
311
312	//RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS,
313	// "Threads: %u Total: %llu Per Sec: %llu Avg: %llu ns Max dev: %llu%%\n",
314	// cThreads,
315	// cItrTotal,
316	// cItrTotal / cSeconds,
317	// ElapsedNS / cItrTotal,
318	// cItrMaxDeviation * 100 / cItrNormal
319	// );
320	//
321	RTTestValue(g_hTest, "Thruput", cItrTotal * UINT32_C(1000000000) / ElapsedNS, RTTESTUNIT_CALLS_PER_SEC);
322	RTTestValue(g_hTest, "Max diviation", cItrMaxDeviation * 100 / cItrNormal, RTTESTUNIT_PCT);
323	}
324
325
326	static DECLCALLBACK(int) Test2Thread(RTTHREAD hThreadSelf, void *pvUser)
327	{
328	RTSEMRW hSemRW = (RTSEMRW)pvUser;
329	RT_NOREF_PV(hThreadSelf);
330
331	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 0), VERR_TIMEOUT);
332	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 0), VERR_TIMEOUT);
333
334	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 1), VERR_TIMEOUT);
335	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 1), VERR_TIMEOUT);
336
337	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 50), VERR_TIMEOUT);
338	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 50), VERR_TIMEOUT);
339
340	return VINF_SUCCESS;
341	}
342
343
344	static void Test3(void)
345	{
346	RTTestSub(g_hTest, "Negative");
347	bool fSavedAssertQuiet = RTAssertSetQuiet(true);
348	bool fSavedAssertMayPanic = RTAssertSetMayPanic(false);
349	bool fSavedLckValEnabled = RTLockValidatorSetEnabled(false);
350
351	RTSEMRW hSemRW;
352	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS);
353
354	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VERR_NOT_OWNER);
355	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VERR_NOT_OWNER);
356
357	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
358	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VERR_NOT_OWNER);
359
360	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
361	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VERR_WRONG_ORDER); /* cannot release the final write before the reads. */
362	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS);
363	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS);
364
365	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS);
366
367	RTLockValidatorSetEnabled(fSavedLckValEnabled);
368	RTAssertSetMayPanic(fSavedAssertMayPanic);
369	RTAssertSetQuiet(fSavedAssertQuiet);
370	}
371
372	static void Test2(void)
373	{
374	RTTestSub(g_hTest, "Timeout");
375
376	RTSEMRW hSemRW = NIL_RTSEMRW;
377	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS);
378
379	/* Lock it for writing and let the thread do the remainder of the test. */
380	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
381
382	RTTHREAD hThread;
383	RTTEST_CHECK_RC_RETV(g_hTest, RTThreadCreate(&hThread, Test2Thread, hSemRW, 0,
384	RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "test2"),
385	VINF_SUCCESS);
386	RTTEST_CHECK_RC(g_hTest, RTThreadWait(hThread, 15000, NULL), VINF_SUCCESS);
387	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS);
388
389	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS);
390	}
391
392
393	static bool Test1(void)
394	{
395	RTTestSub(g_hTest, "Basics");
396
397	RTSEMRW hSemRW = NIL_RTSEMRW;
398	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS, false);
399	RTTEST_CHECK_RET(g_hTest, hSemRW != NIL_RTSEMRW, false);
400
401	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
402	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
403
404	for (unsigned cMs = 0; cMs < 50; cMs++)
405	{
406	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
407	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
408	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
409	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
410	}
411
412	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
413	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
414
415	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
416	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
417	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
418	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
419
420	for (unsigned cMs = 0; cMs < 50; cMs++)
421	{
422	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
423	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 1, false);
424	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
425	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
426
427	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
428	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
429	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
430	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
431
432	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
433	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
434	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 1, false);
435	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
436
437	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
438	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 3, false);
439	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 1, false);
440	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
441
442	/* midway */
443
444	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
445	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
446	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 1, false);
447	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
448
449	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
450	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
451	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
452	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
453
454	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
455	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 1, false);
456	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
457	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
458
459	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
460	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 0, false);
461	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
462	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == false, false);
463	}
464
465	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS, false);
466	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWDestroy(NIL_RTSEMRW), VINF_SUCCESS, false);
467
468	return true;
469	}
470
471	int main(int argc, char **argv)
472	{
473	RT_NOREF_PV(argv);
474	int rc = RTTestInitAndCreate("tstRTSemRW", &g_hTest);
475	if (rc)
476	return 1;
477	RTTestBanner(g_hTest);
478
479	if (Test1())
480	{
481	RTCPUID cCores = RTMpGetOnlineCoreCount();
482	if (argc == 1)
483	{
484	Test2();
485	Test3();
486
487	/* threads, seconds, writePercent, yield, quiet */
488	Test4( 1, 1, 0, true, false);
489	Test4( 1, 1, 1, true, false);
490	Test4( 1, 1, 5, true, false);
491	Test4( 2, 1, 3, true, false);
492	Test4( 10, 1, 5, true, false);
493	Test4( 10, 10, 10, false, false);
494
495	if (cCores > 1)
496	{
497	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "benchmarking (%u CPU cores)...\n", cCores);
498	for (unsigned cThreads = 1; cThreads < 32; cThreads++)
499	Test4(cThreads, 2, 1, false, true);
500	}
501	else
502	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "skipping benchmarking (only %u CPU core available)\n", cCores);
503
504	/** @todo add a testcase where some stuff times out. */
505	}
506	else
507	{
508	if (cCores > 1)
509	{
510	/* threads, seconds, writePercent, yield, quiet */
511	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "benchmarking...\n");
512	Test4( 1, 3, 1, false, true);
513	Test4( 1, 3, 1, false, true);
514	Test4( 1, 3, 1, false, true);
515	Test4( 2, 3, 1, false, true);
516	Test4( 2, 3, 1, false, true);
517	Test4( 2, 3, 1, false, true);
518	Test4( 3, 3, 1, false, true);
519	Test4( 3, 3, 1, false, true);
520	Test4( 3, 3, 1, false, true);
521	}
522	else
523	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "skipping benchmarking (only %u CPU core available)\n", cCores);
524	}
525	}
526
527	return RTTestSummaryAndDestroy(g_hTest);
528	}
529

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source: vbox/trunk/src/VBox/Runtime/testcase/tstRTSemRW.cpp@ 106061

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