tstRTSemRW.cpp@ 25521

Last change on this file since 25521 was 25521, checked in by vboxsync, 15 years ago
tstRTSemRW.cpp: Negative testing.
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File size: 19.8 KB

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1	/* $Id: tstRTSemRW.cpp 25521 2009-12-20 16:41:50Z vboxsync $ */
2	/** @file
3	* IPRT Testcase - Reader/Writer Semaphore.
4	*/
5
6	/*
7	* Copyright (C) 2009 Sun Microsystems, Inc.
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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
27	* Clara, CA 95054 USA or visit http://www.sun.com if you need
28	* additional information or have any questions.
29	*/
30
31	/*******************************************************************************
32	* Header Files *
33	*******************************************************************************/
34	#include <iprt/semaphore.h>
35
36	#include <iprt/asm.h>
37	#include <iprt/assert.h>
38	#include <iprt/err.h>
39	#include <iprt/initterm.h>
40	#include <iprt/lockvalidator.h>
41	#include <iprt/rand.h>
42	#include <iprt/string.h>
43	#include <iprt/stream.h>
44	#include <iprt/test.h>
45	#include <iprt/time.h>
46	#include <iprt/thread.h>
47
48
49	/*******************************************************************************
50	* Global Variables *
51	*******************************************************************************/
52	static RTTEST g_hTest;
53	static RTSEMRW g_hSemRW = NIL_RTSEMRW;
54	static bool volatile g_fTerminate;
55	static bool g_fYield;
56	static bool g_fQuiet;
57	static unsigned g_uWritePercent;
58	static uint32_t volatile g_cConcurrentWriters;
59	static uint32_t volatile g_cConcurrentReaders;
60
61
62	static DECLCALLBACK(int) Test4Thread(RTTHREAD ThreadSelf, void *pvUser)
63	{
64	// Use randomization to get a little more variation of the sync pattern
65	int rc;
66	RTRAND hRand;
67	RTTEST_CHECK_RC_OK_RET(g_hTest, rc = RTRandAdvCreateParkMiller(&hRand), rc);
68	RTTEST_CHECK_RC_OK_RET(g_hTest, rc = RTRandAdvSeed(hRand, (uintptr_t)ThreadSelf), rc);
69	unsigned c100 = RTRandAdvU32Ex(hRand, 0, 99);
70
71	uint64_t pcItr = (uint64_t )pvUser;
72	bool fWrite;
73	for (;;)
74	{
75	unsigned readrec = RTRandAdvU32Ex(hRand, 0, 3);
76	unsigned writerec = RTRandAdvU32Ex(hRand, 0, 3);
77	/* Don't overdo recursion testing. */
78	if (readrec > 1)
79	readrec--;
80	if (writerec > 1)
81	writerec--;
82
83	fWrite = (c100 < g_uWritePercent);
84	if (fWrite)
85	{
86	for (unsigned i = 0; i <= writerec; i++)
87	{
88	rc = RTSemRWRequestWriteNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
89	if (RT_FAILURE(rc))
90	{
91	RTTestFailed(g_hTest, "Write recursion %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
92	break;
93	}
94	}
95	if (RT_FAILURE(rc))
96	break;
97	if (ASMAtomicIncU32(&g_cConcurrentWriters) != 1)
98	{
99	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s after write locking it",
100	g_cConcurrentWriters, RTThreadSelfName());
101	break;
102	}
103	if (g_cConcurrentReaders != 0)
104	{
105	RTTestFailed(g_hTest, "g_cConcurrentReaders=%u on %s after write locking it",
106	g_cConcurrentReaders, RTThreadSelfName());
107	break;
108	}
109	}
110	else
111	{
112	rc = RTSemRWRequestReadNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
113	if (RT_FAILURE(rc))
114	{
115	RTTestFailed(g_hTest, "Read locking on %s failed with rc=%Rrc", RTThreadSelfName(), rc);
116	break;
117	}
118	ASMAtomicIncU32(&g_cConcurrentReaders);
119	if (g_cConcurrentWriters != 0)
120	{
121	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s after read locking it",
122	g_cConcurrentWriters, RTThreadSelfName());
123	break;
124	}
125	}
126	for (unsigned i = 0; i < readrec; i++)
127	{
128	rc = RTSemRWRequestReadNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
129	if (RT_FAILURE(rc))
130	{
131	RTTestFailed(g_hTest, "Read recursion %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
132	break;
133	}
134	}
135	if (RT_FAILURE(rc))
136	break;
137
138	/*
139	* Check for fairness: The values of the threads should not differ too much
140	*/
141	(*pcItr)++;
142
143	/*
144	* Check for correctness: Give other threads a chance. If the implementation is
145	* correct, no other thread will be able to enter this lock now.
146	*/
147	if (g_fYield)
148	RTThreadYield();
149
150	for (unsigned i = 0; i < readrec; i++)
151	{
152	rc = RTSemRWReleaseRead(g_hSemRW);
153	if (RT_FAILURE(rc))
154	{
155	RTTestFailed(g_hTest, "Read release %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
156	break;
157	}
158	}
159	if (RT_FAILURE(rc))
160	break;
161
162	if (fWrite)
163	{
164	if (ASMAtomicDecU32(&g_cConcurrentWriters) != 0)
165	{
166	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s before write release",
167	g_cConcurrentWriters, RTThreadSelfName());
168	break;
169	}
170	if (g_cConcurrentReaders != 0)
171	{
172	RTTestFailed(g_hTest, "g_cConcurrentReaders=%u on %s before write release",
173	g_cConcurrentReaders, RTThreadSelfName());
174	break;
175	}
176	for (unsigned i = 0; i <= writerec; i++)
177	{
178	rc = RTSemRWReleaseWrite(g_hSemRW);
179	if (RT_FAILURE(rc))
180	{
181	RTTestFailed(g_hTest, "Write release %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
182	break;
183	}
184	}
185	}
186	else
187	{
188	if (g_cConcurrentWriters != 0)
189	{
190	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s before read release",
191	g_cConcurrentWriters, RTThreadSelfName());
192	break;
193	}
194	ASMAtomicDecU32(&g_cConcurrentReaders);
195	rc = RTSemRWReleaseRead(g_hSemRW);
196	if (RT_FAILURE(rc))
197	{
198	RTTestFailed(g_hTest, "Read release on %s failed with rc=%Rrc", RTThreadSelfName(), rc);
199	break;
200	}
201	}
202
203	if (g_fTerminate)
204	break;
205
206	c100++;
207	c100 %= 100;
208	}
209	if (!g_fQuiet)
210	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "Thread %s exited with %lld\n", RTThreadSelfName(), *pcItr);
211	RTRandAdvDestroy(hRand);
212	return VINF_SUCCESS;
213	}
214
215
216	static void Test4(unsigned cThreads, unsigned cSeconds, unsigned uWritePercent, bool fYield, bool fQuiet)
217	{
218	int rc;
219	unsigned i;
220	uint64_t acIterations[32];
221	RTTHREAD aThreads[RT_ELEMENTS(acIterations)];
222	AssertRelease(cThreads <= RT_ELEMENTS(acIterations));
223
224	RTTestSubF(g_hTest, "Test4 - %u threads, %u sec, %u%% writes, %syielding",
225	cThreads, cSeconds, uWritePercent, fYield ? "" : "non-");
226
227	/*
228	* Init globals.
229	*/
230	g_fYield = fYield;
231	g_fQuiet = fQuiet;
232	g_fTerminate = false;
233	g_uWritePercent = uWritePercent;
234	g_cConcurrentWriters = 0;
235	g_cConcurrentReaders = 0;
236
237	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&g_hSemRW), VINF_SUCCESS);
238
239	/*
240	* Create the threads and let them block on the semrw.
241	*/
242	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWRequestWrite(g_hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
243
244	for (i = 0; i < cThreads; i++)
245	{
246	acIterations[i] = 0;
247	RTTEST_CHECK_RC_RETV(g_hTest, RTThreadCreateF(&aThreads[i], Test4Thread, &acIterations[i], 0,
248	RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE,
249	"test-%u", i), VINF_SUCCESS);
250	}
251
252	/*
253	* Do the test run.
254	*/
255	uint32_t cErrorsBefore = RTTestErrorCount(g_hTest);
256	uint64_t u64StartTS = RTTimeNanoTS();
257	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(g_hSemRW), VINF_SUCCESS);
258	RTThreadSleep(cSeconds * 1000);
259	ASMAtomicWriteBool(&g_fTerminate, true);
260	uint64_t ElapsedNS = RTTimeNanoTS() - u64StartTS;
261
262	/*
263	* Clean up the threads and semaphore.
264	*/
265	for (i = 0; i < cThreads; i++)
266	RTTEST_CHECK_RC(g_hTest, RTThreadWait(aThreads[i], 5000, NULL), VINF_SUCCESS);
267
268	RTTEST_CHECK_MSG(g_hTest, g_cConcurrentWriters == 0, (g_hTest, "g_cConcurrentWriters=%u at end of test\n", g_cConcurrentWriters));
269	RTTEST_CHECK_MSG(g_hTest, g_cConcurrentReaders == 0, (g_hTest, "g_cConcurrentReaders=%u at end of test\n", g_cConcurrentReaders));
270
271	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(g_hSemRW), VINF_SUCCESS);
272	g_hSemRW = NIL_RTSEMRW;
273
274	if (RTTestErrorCount(g_hTest) != cErrorsBefore)
275	RTThreadSleep(100);
276
277	/*
278	* Collect and display the results.
279	*/
280	uint64_t cItrTotal = acIterations[0];
281	for (i = 1; i < cThreads; i++)
282	cItrTotal += acIterations[i];
283
284	uint64_t cItrNormal = cItrTotal / cThreads;
285	uint64_t cItrMinOK = cItrNormal / 20; /* 5% */
286	uint64_t cItrMaxDeviation = 0;
287	for (i = 0; i < cThreads; i++)
288	{
289	uint64_t cItrDelta = RT_ABS((int64_t)(acIterations[i] - cItrNormal));
290	if (acIterations[i] < cItrMinOK)
291	RTTestFailed(g_hTest, "Thread %u did less than 5%% of the iterations - %llu (it) vs. %llu (5%%) - %llu%%\n",
292	i, acIterations[i], cItrMinOK, cItrDelta * 100 / cItrNormal);
293	else if (cItrDelta > cItrNormal / 2)
294	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS,
295	"Warning! Thread %u deviates by more than 50%% - %llu (it) vs. %llu (avg) - %llu%%\n",
296	i, acIterations[i], cItrNormal, cItrDelta * 100 / cItrNormal);
297	if (cItrDelta > cItrMaxDeviation)
298	cItrMaxDeviation = cItrDelta;
299
300	}
301
302	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS,
303	"Threads: %u Total: %llu Per Sec: %llu Avg: %llu ns Max dev: %llu%%\n",
304	cThreads,
305	cItrTotal,
306	cItrTotal / cSeconds,
307	ElapsedNS / cItrTotal,
308	cItrMaxDeviation * 100 / cItrNormal
309	);
310	}
311
312
313	static DECLCALLBACK(int) Test2Thread(RTTHREAD hThreadSelf, void *pvUser)
314	{
315	RTSEMRW hSemRW = (RTSEMRW)pvUser;
316
317	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 0), VERR_TIMEOUT);
318	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 0), VERR_TIMEOUT);
319
320	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 1), VERR_TIMEOUT);
321	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 1), VERR_TIMEOUT);
322
323	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 50), VERR_TIMEOUT);
324	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 50), VERR_TIMEOUT);
325
326	return VINF_SUCCESS;
327	}
328
329
330	static void Test3(void)
331	{
332	RTTestSub(g_hTest, "Negative");
333	bool fSavedAssertQuiet = RTAssertSetQuiet(true);
334	bool fSavedAssertMayPanic = RTAssertSetMayPanic(false);
335	bool fSavedLckValEnabled = RTLockValidatorSetEnabled(false);
336
337	RTSEMRW hSemRW;
338	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS);
339
340	#ifndef RT_OS_LINUX /** @todo unlock is busted in glibc-2.8 at least... */
341	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VERR_NOT_OWNER);
342	#endif
343	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VERR_NOT_OWNER);
344
345	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
346	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VERR_NOT_OWNER);
347
348	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
349	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VERR_WRONG_ORDER); /* cannot release the final write before the reads. */
350	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS);
351	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS);
352
353	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS);
354
355	RTLockValidatorSetEnabled(fSavedLckValEnabled);
356	RTAssertSetMayPanic(fSavedAssertMayPanic);
357	RTAssertSetQuiet(fSavedAssertQuiet);
358	}
359
360	static void Test2(void)
361	{
362	RTTestSub(g_hTest, "Timeout");
363
364	RTSEMRW hSemRW = NIL_RTSEMRW;
365	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS);
366
367	/* Lock it for writing and let the thread do the remainder of the test. */
368	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
369
370	RTTHREAD hThread;
371	RTTEST_CHECK_RC_RETV(g_hTest, RTThreadCreate(&hThread, Test2Thread, hSemRW, 0,
372	RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "test2"),
373	VINF_SUCCESS);
374	RTTEST_CHECK_RC(g_hTest, RTThreadWait(hThread, 15000, NULL), VINF_SUCCESS);
375	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS);
376
377	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS);
378	}
379
380
381	static bool Test1(void)
382	{
383	RTTestSub(g_hTest, "Basics");
384
385	RTSEMRW hSemRW = NIL_RTSEMRW;
386	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS, false);
387	RTTEST_CHECK_RET(g_hTest, hSemRW != NIL_RTSEMRW, false);
388
389	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
390	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
391
392	for (unsigned cMs = 0; cMs < 50; cMs++)
393	{
394	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
395	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
396	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
397	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
398	}
399
400	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
401	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
402
403	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
404	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
405	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
406	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
407
408	for (unsigned cMs = 0; cMs < 50; cMs++)
409	{
410	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
411	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 1, false);
412	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
413	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
414
415	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
416	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
417	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
418	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
419
420	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
421	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
422	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 1, false);
423	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
424
425	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
426	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 3, false);
427	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 1, false);
428	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
429
430	/* midway */
431
432	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), 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, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
438	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
439	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
440	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
441
442	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
443	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 1, false);
444	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
445	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
446
447	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
448	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 0, false);
449	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
450	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == false, false);
451	}
452
453	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS, false);
454	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWDestroy(NIL_RTSEMRW), VINF_SUCCESS, false);
455
456	return true;
457	}
458
459	int main(int argc, char **argv)
460	{
461	int rc = RTTestInitAndCreate("tstRTSemRW", &g_hTest);
462	if (rc)
463	return 1;
464	RTTestBanner(g_hTest);
465
466	if (Test1())
467	{
468	if (argc == 1)
469	{
470	Test2();
471	Test3();
472
473	/* threads, seconds, writePercent, yield, quiet */
474	Test4( 1, 1, 0, true, false);
475	Test4( 1, 1, 1, true, false);
476	Test4( 1, 1, 5, true, false);
477	Test4( 2, 1, 3, true, false);
478	Test4( 10, 1, 5, true, false);
479	Test4( 10, 10, 10, false, false);
480
481	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "benchmarking...\n");
482	for (unsigned cThreads = 1; cThreads < 32; cThreads++)
483	Test4(cThreads, 2, 1, false, true);
484
485	/** @todo add a testcase where some stuff times out. */
486	}
487	else
488	{
489	/* threads, seconds, writePercent, yield, quiet */
490	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "benchmarking...\n");
491	Test4( 1, 3, 1, false, true);
492	Test4( 1, 3, 1, false, true);
493	Test4( 1, 3, 1, false, true);
494	Test4( 2, 3, 1, false, true);
495	Test4( 2, 3, 1, false, true);
496	Test4( 2, 3, 1, false, true);
497	Test4( 3, 3, 1, false, true);
498	Test4( 3, 3, 1, false, true);
499	Test4( 3, 3, 1, false, true);
500	}
501	}
502
503	return RTTestSummaryAndDestroy(g_hTest);
504	}
505

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source: vbox/trunk/src/VBox/Runtime/testcase/tstRTSemRW.cpp@ 25521

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