| 1 | /* $Id: tstOnce.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT Testcase - RTOnce.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2008-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <iprt/once.h>
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| 42 | #include <iprt/stream.h>
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| 43 | #include <iprt/initterm.h>
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| 44 | #include <iprt/thread.h>
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| 45 | #include <iprt/semaphore.h>
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| 46 | #include <iprt/string.h>
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| 47 | #include <iprt/errcore.h>
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| 48 | #include <iprt/asm.h>
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| 49 |
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| 50 |
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| 51 | /*********************************************************************************************************************************
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| 52 | * Global Variables *
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| 53 | *********************************************************************************************************************************/
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| 54 | static int g_cErrors = 0;
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| 55 | static bool g_fOnceCB1 = false;
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| 56 | static uint32_t volatile g_cOnce2CB = 0;
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| 57 | static bool volatile g_fOnce2Ready = false;
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| 58 | static RTONCE g_Once2 = RTONCE_INITIALIZER;
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| 59 | static RTSEMEVENTMULTI g_hEventMulti = NIL_RTSEMEVENTMULTI;
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| 60 |
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| 61 |
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| 62 | static DECLCALLBACK(int) Once1CB(void *pvUser)
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| 63 | {
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| 64 | if (g_fOnceCB1)
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| 65 | return VERR_WRONG_ORDER;
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| 66 | if (pvUser != (void *)1)
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| 67 | {
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| 68 | RTPrintf("tstOnce: ERROR - Once1CB: pvUser=%p!\n", pvUser);
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| 69 | g_cErrors++;
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| 70 | return VERR_INVALID_PARAMETER;
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| 71 | }
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| 72 | return VINF_SUCCESS;
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| 73 | }
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| 74 |
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| 75 |
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| 76 | static DECLCALLBACK(int) Once2CB(void *pvUser)
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| 77 | {
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| 78 | if (ASMAtomicIncU32(&g_cOnce2CB) != 1)
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| 79 | {
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| 80 | RTPrintf("tstOnce: ERROR - Once2CB: g_cOnce2CB not zero!\n");
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| 81 | g_cErrors++;
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| 82 | return VERR_WRONG_ORDER;
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| 83 | }
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| 84 | if (pvUser != (void *)42)
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| 85 | {
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| 86 | RTPrintf("tstOnce: ERROR - Once2CB: pvUser=%p!\n", pvUser);
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| 87 | g_cErrors++;
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| 88 | return VERR_INVALID_PARAMETER;
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| 89 | }
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| 90 | RTThreadSleep(2);
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| 91 | Assert(!g_fOnce2Ready);
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| 92 | ASMAtomicWriteBool(&g_fOnce2Ready, true);
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| 93 | return VINF_SUCCESS;
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| 94 | }
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| 95 |
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| 96 | static DECLCALLBACK(int) Once2Thread(RTTHREAD hThread, void *pvUser)
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| 97 | {
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| 98 | NOREF(hThread); NOREF(pvUser);
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| 99 |
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| 100 | int rc = RTSemEventMultiWait(g_hEventMulti, RT_INDEFINITE_WAIT);
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| 101 | if (RT_FAILURE(rc))
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| 102 | return rc;
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| 103 | rc = RTOnce(&g_Once2, Once2CB, (void *)42);
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| 104 | if (RT_SUCCESS(rc))
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| 105 | {
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| 106 | if (!ASMAtomicUoReadBool(&g_fOnce2Ready))
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| 107 | {
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| 108 | RTPrintf("tstOnce: ERROR - Once2CB: Not initialized!\n");
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| 109 | g_cErrors++;
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| 110 | }
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| 111 | }
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| 112 | return rc;
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| 113 | }
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| 114 |
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| 115 |
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| 116 | int main()
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| 117 | {
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| 118 | RTR3InitExeNoArguments(0);
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| 119 |
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| 120 | /*
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| 121 | * Just a simple testcase.
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| 122 | */
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| 123 | RTPrintf("tstOnce: TESTING - smoke...\n");
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| 124 | RTONCE Once1 = RTONCE_INITIALIZER;
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| 125 | g_fOnceCB1 = false;
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| 126 | int rc = RTOnce(&Once1, Once1CB, (void *)1);
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| 127 | if (rc != VINF_SUCCESS)
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| 128 | RTPrintf("tstOnce: ERROR - Once1, 1 failed, rc=%Rrc\n", rc);
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| 129 | g_fOnceCB1 = false;
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| 130 | rc = RTOnce(&Once1, Once1CB, (void *)1);
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| 131 | if (rc != VINF_SUCCESS)
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| 132 | RTPrintf("tstOnce: ERROR - Once1, 2 failed, rc=%Rrc\n", rc);
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| 133 |
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| 134 | /*
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| 135 | * Throw a bunch of threads up against a init once thing.
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| 136 | */
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| 137 | RTPrintf("tstOnce: TESTING - bunch of threads...\n");
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| 138 | /* create the semaphore they'll be waiting on. */
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| 139 | rc = RTSemEventMultiCreate(&g_hEventMulti);
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| 140 | if (RT_FAILURE(rc))
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| 141 | {
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| 142 | RTPrintf("tstOnce: FATAL ERROR - RTSemEventMultiCreate returned %Rrc\n", rc);
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| 143 | return 1;
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| 144 | }
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| 145 |
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| 146 | /* create the threads */
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| 147 | RTTHREAD aThreads[32];
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| 148 | for (unsigned i = 0; i < RT_ELEMENTS(aThreads); i++)
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| 149 | {
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| 150 | char szName[16];
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| 151 | RTStrPrintf(szName, sizeof(szName), "ONCE2-%d\n", i);
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| 152 | rc = RTThreadCreate(&aThreads[i], Once2Thread, NULL, 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, szName);
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| 153 | if (RT_FAILURE(rc))
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| 154 | {
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| 155 | RTPrintf("tstOnce: ERROR - failed to create thread #%d\n", i);
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| 156 | g_cErrors++;
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| 157 | }
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| 158 | }
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| 159 |
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| 160 | /* kick them off and yield */
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| 161 | rc = RTSemEventMultiSignal(g_hEventMulti);
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| 162 | if (RT_FAILURE(rc))
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| 163 | {
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| 164 | RTPrintf("tstOnce: FATAL ERROR - RTSemEventMultiSignal returned %Rrc\n", rc);
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| 165 | return 1;
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| 166 | }
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| 167 | RTThreadYield();
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| 168 |
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| 169 | /* wait for all of them to finish up, 30 seconds each. */
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| 170 | for (unsigned i = 0; i < RT_ELEMENTS(aThreads); i++)
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| 171 | if (aThreads[i] != NIL_RTTHREAD)
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| 172 | {
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| 173 | int rc2;
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| 174 | rc = RTThreadWait(aThreads[i], 30*1000, &rc2);
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| 175 | if (RT_FAILURE(rc))
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| 176 | {
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| 177 | RTPrintf("tstOnce: ERROR - RTThreadWait on thread #%u returned %Rrc\n", i, rc);
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| 178 | g_cErrors++;
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| 179 | }
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| 180 | else if (RT_FAILURE(rc2))
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| 181 | {
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| 182 | RTPrintf("tstOnce: ERROR - Thread #%u returned %Rrc\n", i, rc2);
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| 183 | g_cErrors++;
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| 184 | }
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| 185 | }
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| 186 |
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| 187 | /*
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| 188 | * Summary.
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| 189 | */
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| 190 | if (!g_cErrors)
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| 191 | RTPrintf("tstOnce: SUCCESS\n");
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| 192 | else
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| 193 | RTPrintf("tstOnce: FAILURE - %d errors\n", g_cErrors);
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| 194 |
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| 195 | return !!g_cErrors;
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| 196 | }
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| 197 |
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