| 1 | /* $Id: tstRTSemXRoads.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT Testcase - RTSemXRoads.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <iprt/semaphore.h>
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| 32 |
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| 33 | #include <iprt/asm.h>
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| 34 | #include <iprt/errcore.h>
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| 35 | #include <iprt/initterm.h>
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| 36 | #include <iprt/test.h>
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| 37 | #include <iprt/thread.h>
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| 38 | #include <iprt/time.h>
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| 39 |
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| 40 |
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| 41 | /*********************************************************************************************************************************
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| 42 | * Global Variables *
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| 43 | *********************************************************************************************************************************/
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| 44 | static RTTEST g_hTest;
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| 45 |
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| 46 | static uint32_t volatile g_cNSCrossings;
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| 47 | static uint32_t volatile g_cEWCrossings;
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| 48 | static uint64_t g_u64StartMilliTS;
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| 49 | static uint32_t g_cSecs;
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| 50 | static RTSEMXROADS g_hXRoads;
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| 51 |
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| 52 |
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| 53 | static int tstTrafficThreadCommon(uintptr_t iThread, bool fNS)
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| 54 | {
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| 55 | RT_NOREF_PV(iThread);
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| 56 |
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| 57 | for (uint32_t iLoop = 0; RTTimeMilliTS() - g_u64StartMilliTS < g_cSecs*1000; iLoop++)
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| 58 | {
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| 59 | /* fudge */
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| 60 | if ((iLoop % 223) == 222)
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| 61 | RTThreadYield();
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| 62 | else if ((iLoop % 16127) == 16126)
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| 63 | RTThreadSleep(1);
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| 64 |
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| 65 | if (fNS)
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| 66 | {
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| 67 | RTTEST_CHECK_RC(g_hTest,RTSemXRoadsNSEnter(g_hXRoads), VINF_SUCCESS);
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| 68 | ASMAtomicIncU32(&g_cNSCrossings);
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| 69 | RTTEST_CHECK_RC(g_hTest,RTSemXRoadsNSLeave(g_hXRoads), VINF_SUCCESS);
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| 70 | }
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| 71 | else
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| 72 | {
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| 73 | RTTEST_CHECK_RC(g_hTest,RTSemXRoadsEWEnter(g_hXRoads), VINF_SUCCESS);
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| 74 | ASMAtomicIncU32(&g_cEWCrossings);
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| 75 | RTTEST_CHECK_RC(g_hTest,RTSemXRoadsEWLeave(g_hXRoads), VINF_SUCCESS);
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| 76 | }
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| 77 | }
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| 78 | return VINF_SUCCESS;
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| 79 | }
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| 80 |
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| 81 |
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| 82 | static DECLCALLBACK(int) tstTrafficNSThread(RTTHREAD hSelf, void *pvUser)
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| 83 | {
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| 84 | RT_NOREF_PV(hSelf);
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| 85 |
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| 86 | uintptr_t iThread = (uintptr_t)pvUser;
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| 87 | return tstTrafficThreadCommon(iThread, true);
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| 88 | }
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| 89 |
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| 90 |
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| 91 | static DECLCALLBACK(int) tstTrafficEWThread(RTTHREAD hSelf, void *pvUser)
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| 92 | {
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| 93 | RT_NOREF_PV(hSelf);
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| 94 |
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| 95 | uintptr_t iThread = (uintptr_t)pvUser;
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| 96 | return tstTrafficThreadCommon(iThread, false);
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| 97 | }
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| 98 |
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| 99 |
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| 100 | static void tstTraffic(unsigned cThreads, unsigned cSecs)
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| 101 | {
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| 102 | RTTestSubF(g_hTest, "Traffic - %u threads per direction, %u sec", cThreads, cSecs);
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| 103 |
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| 104 | /*
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| 105 | * Create X worker threads which drives in the south/north direction and Y
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| 106 | * worker threads which drives in the west/east direction. Let them drive
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| 107 | * in a loop for 15 seconds with slight delays between some of the runs and
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| 108 | * then check the numbers.
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| 109 | */
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| 110 |
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| 111 | /* init */
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| 112 | RTTHREAD ahThreadsX[8];
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| 113 | for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsX); i++)
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| 114 | ahThreadsX[i] = NIL_RTTHREAD;
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| 115 | AssertRelease(RT_ELEMENTS(ahThreadsX) >= cThreads);
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| 116 |
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| 117 | RTTHREAD ahThreadsY[8];
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| 118 | for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsY); i++)
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| 119 | ahThreadsY[i] = NIL_RTTHREAD;
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| 120 | AssertRelease(RT_ELEMENTS(ahThreadsY) >= cThreads);
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| 121 |
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| 122 | g_cNSCrossings = 0;
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| 123 | g_cEWCrossings = 0;
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| 124 | g_cSecs = cSecs;
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| 125 | g_u64StartMilliTS = RTTimeMilliTS();
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| 126 |
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| 127 | /* create */
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| 128 | RTTEST_CHECK_RC_RETV(g_hTest, RTSemXRoadsCreate(&g_hXRoads), VINF_SUCCESS);
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| 129 |
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| 130 | int rc = VINF_SUCCESS;
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| 131 | for (unsigned i = 0; i < cThreads && RT_SUCCESS(rc); i++)
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| 132 | {
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| 133 | rc = RTThreadCreateF(&ahThreadsX[i], tstTrafficNSThread, (void *)(uintptr_t)i, 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "NS-%u", i);
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| 134 | RTTEST_CHECK_RC_OK(g_hTest, rc);
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| 135 | }
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| 136 |
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| 137 | for (unsigned i = 0; i < cThreads && RT_SUCCESS(rc); i++)
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| 138 | {
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| 139 | rc = RTThreadCreateF(&ahThreadsX[i], tstTrafficEWThread, (void *)(uintptr_t)i, 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "NS-%u", i);
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| 140 | RTTEST_CHECK_RC_OK(g_hTest, rc);
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| 141 | }
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| 142 |
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| 143 | /* wait */
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| 144 | for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsX); i++)
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| 145 | if (ahThreadsX[i] != NIL_RTTHREAD)
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| 146 | {
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| 147 | int rc2 = RTThreadWaitNoResume(ahThreadsX[i], (60 + cSecs) * 1000, NULL);
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| 148 | RTTEST_CHECK_RC_OK(g_hTest, rc2);
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| 149 | }
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| 150 |
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| 151 | for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsY); i++)
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| 152 | if (ahThreadsY[i] != NIL_RTTHREAD)
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| 153 | {
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| 154 | int rc2 = RTThreadWaitNoResume(ahThreadsY[i], (60 + cSecs) * 1000, NULL);
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| 155 | RTTEST_CHECK_RC_OK(g_hTest, rc2);
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| 156 | }
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| 157 |
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| 158 | RTTEST_CHECK_MSG_RETV(g_hTest, g_cEWCrossings > 10 && g_cNSCrossings,
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| 159 | (g_hTest, "cEWCrossings=%u g_cNSCrossings=%u\n", g_cEWCrossings, g_cNSCrossings));
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| 160 | RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "cNSCrossings=%u\n", g_cNSCrossings);
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| 161 | RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "cEWCrossings=%u\n", g_cEWCrossings);
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| 162 | }
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| 163 |
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| 164 |
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| 165 |
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| 166 | static bool tstBasics(void)
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| 167 | {
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| 168 | RTTestSub(g_hTest, "Basics");
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| 169 |
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| 170 | RTSEMXROADS hXRoads;
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| 171 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsCreate(&hXRoads), VINF_SUCCESS, false);
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| 172 |
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| 173 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
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| 174 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
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| 175 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWEnter(hXRoads), VINF_SUCCESS, false);
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| 176 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWLeave(hXRoads), VINF_SUCCESS, false);
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| 177 |
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| 178 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWEnter(hXRoads), VINF_SUCCESS, false);
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| 179 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWLeave(hXRoads), VINF_SUCCESS, false);
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| 180 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
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| 181 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
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| 182 |
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| 183 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
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| 184 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
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| 185 |
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| 186 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsDestroy(hXRoads), VINF_SUCCESS, false);
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| 187 | RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsDestroy(NIL_RTSEMXROADS), VINF_SUCCESS, false);
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| 188 |
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| 189 | return true;
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| 190 | }
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| 191 |
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| 192 |
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| 193 | int main()
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| 194 | {
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| 195 | int rc = RTTestInitAndCreate("tstRTSemXRoads", &g_hTest);
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| 196 | if (rc)
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| 197 | return rc;
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| 198 | RTTestBanner(g_hTest);
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| 199 |
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| 200 | if (tstBasics())
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| 201 | {
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| 202 | tstTraffic(1, 5);
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| 203 | tstTraffic(2, 5);
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| 204 | tstTraffic(4, 15);
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| 205 | tstTraffic(8, 10);
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| 206 | }
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| 207 |
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| 208 | return RTTestSummaryAndDestroy(g_hTest);
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| 209 | }
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| 210 |
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