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/* $Id: tstRTSemXRoads.cpp $ */
/** @file
* IPRT Testcase - RTSemXRoads.
*/
/*
* Copyright (C) 2009-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/semaphore.h>
#include <iprt/asm.h>
#include <iprt/errcore.h>
#include <iprt/initterm.h>
#include <iprt/test.h>
#include <iprt/thread.h>
#include <iprt/time.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
static RTTEST g_hTest;
static uint32_t volatile g_cNSCrossings;
static uint32_t volatile g_cEWCrossings;
static uint64_t g_u64StartMilliTS;
static uint32_t g_cSecs;
static RTSEMXROADS g_hXRoads;
static int tstTrafficThreadCommon(uintptr_t iThread, bool fNS)
{
RT_NOREF_PV(iThread);
for (uint32_t iLoop = 0; RTTimeMilliTS() - g_u64StartMilliTS < g_cSecs*1000; iLoop++)
{
/* fudge */
if ((iLoop % 223) == 222)
RTThreadYield();
else if ((iLoop % 16127) == 16126)
RTThreadSleep(1);
if (fNS)
{
RTTEST_CHECK_RC(g_hTest,RTSemXRoadsNSEnter(g_hXRoads), VINF_SUCCESS);
ASMAtomicIncU32(&g_cNSCrossings);
RTTEST_CHECK_RC(g_hTest,RTSemXRoadsNSLeave(g_hXRoads), VINF_SUCCESS);
}
else
{
RTTEST_CHECK_RC(g_hTest,RTSemXRoadsEWEnter(g_hXRoads), VINF_SUCCESS);
ASMAtomicIncU32(&g_cEWCrossings);
RTTEST_CHECK_RC(g_hTest,RTSemXRoadsEWLeave(g_hXRoads), VINF_SUCCESS);
}
}
return VINF_SUCCESS;
}
static DECLCALLBACK(int) tstTrafficNSThread(RTTHREAD hSelf, void *pvUser)
{
RT_NOREF_PV(hSelf);
uintptr_t iThread = (uintptr_t)pvUser;
return tstTrafficThreadCommon(iThread, true);
}
static DECLCALLBACK(int) tstTrafficEWThread(RTTHREAD hSelf, void *pvUser)
{
RT_NOREF_PV(hSelf);
uintptr_t iThread = (uintptr_t)pvUser;
return tstTrafficThreadCommon(iThread, false);
}
static void tstTraffic(unsigned cThreads, unsigned cSecs)
{
RTTestSubF(g_hTest, "Traffic - %u threads per direction, %u sec", cThreads, cSecs);
/*
* Create X worker threads which drives in the south/north direction and Y
* worker threads which drives in the west/east direction. Let them drive
* in a loop for 15 seconds with slight delays between some of the runs and
* then check the numbers.
*/
/* init */
RTTHREAD ahThreadsX[8];
for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsX); i++)
ahThreadsX[i] = NIL_RTTHREAD;
AssertRelease(RT_ELEMENTS(ahThreadsX) >= cThreads);
RTTHREAD ahThreadsY[8];
for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsY); i++)
ahThreadsY[i] = NIL_RTTHREAD;
AssertRelease(RT_ELEMENTS(ahThreadsY) >= cThreads);
g_cNSCrossings = 0;
g_cEWCrossings = 0;
g_cSecs = cSecs;
g_u64StartMilliTS = RTTimeMilliTS();
/* create */
RTTEST_CHECK_RC_RETV(g_hTest, RTSemXRoadsCreate(&g_hXRoads), VINF_SUCCESS);
int rc = VINF_SUCCESS;
for (unsigned i = 0; i < cThreads && RT_SUCCESS(rc); i++)
{
rc = RTThreadCreateF(&ahThreadsX[i], tstTrafficNSThread, (void *)(uintptr_t)i, 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "NS-%u", i);
RTTEST_CHECK_RC_OK(g_hTest, rc);
}
for (unsigned i = 0; i < cThreads && RT_SUCCESS(rc); i++)
{
rc = RTThreadCreateF(&ahThreadsX[i], tstTrafficEWThread, (void *)(uintptr_t)i, 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "NS-%u", i);
RTTEST_CHECK_RC_OK(g_hTest, rc);
}
/* wait */
for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsX); i++)
if (ahThreadsX[i] != NIL_RTTHREAD)
{
int rc2 = RTThreadWaitNoResume(ahThreadsX[i], (60 + cSecs) * 1000, NULL);
RTTEST_CHECK_RC_OK(g_hTest, rc2);
}
for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsY); i++)
if (ahThreadsY[i] != NIL_RTTHREAD)
{
int rc2 = RTThreadWaitNoResume(ahThreadsY[i], (60 + cSecs) * 1000, NULL);
RTTEST_CHECK_RC_OK(g_hTest, rc2);
}
RTTEST_CHECK_MSG_RETV(g_hTest, g_cEWCrossings > 10 && g_cNSCrossings,
(g_hTest, "cEWCrossings=%u g_cNSCrossings=%u\n", g_cEWCrossings, g_cNSCrossings));
RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "cNSCrossings=%u\n", g_cNSCrossings);
RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "cEWCrossings=%u\n", g_cEWCrossings);
}
static bool tstBasics(void)
{
RTTestSub(g_hTest, "Basics");
RTSEMXROADS hXRoads;
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsCreate(&hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWEnter(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWLeave(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWEnter(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWLeave(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsDestroy(hXRoads), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsDestroy(NIL_RTSEMXROADS), VINF_SUCCESS, false);
return true;
}
int main()
{
int rc = RTTestInitAndCreate("tstRTSemXRoads", &g_hTest);
if (rc)
return rc;
RTTestBanner(g_hTest);
if (tstBasics())
{
tstTraffic(1, 5);
tstTraffic(2, 5);
tstTraffic(4, 15);
tstTraffic(8, 10);
}
return RTTestSummaryAndDestroy(g_hTest);
}
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