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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*=====================================================================
**
** Source: CriticalSectionFunctions/test8/test8.c
**
** Pyrpose: Ensure critical section functionality is working by
** having multiple threads racing on a CS under different
** scenarios
**
**
**===================================================================*/
#include <palsuite.h>
#define MAX_THREAD_COUNT 128
#define DEFAULT_THREAD_COUNT 10
#define DEFAULT_LOOP_COUNT 1000
#ifndef MIN
#define MIN(a,b) (((a)<(b)) ? (a) : (b))
#endif
int g_iThreadCount = DEFAULT_THREAD_COUNT;
int g_iLoopCount = DEFAULT_LOOP_COUNT;
volatile LONG g_lCriticalCount = 0;
HANDLE g_hEvStart = NULL;
CRITICAL_SECTION g_cs;
DWORD PALAPI Thread(LPVOID lpParam)
{
int i, j, iLpCnt;
DWORD dwRet = 0;
DWORD dwTid = GetCurrentThreadId();
LONG lRet;
BOOL bSleepInside;
BOOL bSleepOutside;
Trace("[tid=%u] Thread starting\n", dwTid);
dwRet = WaitForSingleObject(g_hEvStart, INFINITE);
if (WAIT_OBJECT_0 != dwRet)
{
Fail("WaitForSingleObject returned unexpected %u [GetLastError()=%u]\n",
dwRet, GetLastError());
}
for (j=0;j<8;j++)
{
bSleepInside = 2 & j;
bSleepOutside = 4 & j;
iLpCnt = g_iLoopCount;
if (bSleepInside || bSleepOutside)
{
iLpCnt /= 10;
}
for (i=0;i<iLpCnt;i++)
{
EnterCriticalSection(&g_cs);
if (1 & i)
{
// Simple increment on odd iterations
lRet = (g_lCriticalCount += 1);
}
else
{
// Interlocked increment on even iterations
lRet = InterlockedIncrement(&g_lCriticalCount);
}
if (1 != lRet || 1 != g_lCriticalCount)
{
Fail("Detected %d threads in area protected by critical section "
"[expected: 1 thread]\n", g_lCriticalCount);
}
if (bSleepInside)
{
Sleep(rand()%10);
}
if (1 != g_lCriticalCount)
{
Fail("Detected %d threads inside area protected by critical section "
"[expected: 1 thread]\n", (int)g_lCriticalCount);
}
if (1 & i)
{
// Simple decrement on odd iterations
lRet = (g_lCriticalCount -= 1);
}
else
{
// Interlocked decrement on even iterations
lRet = InterlockedDecrement(&g_lCriticalCount);
}
LeaveCriticalSection(&g_cs);
if (bSleepOutside)
{
Sleep(rand()%10);
}
}
}
Trace("[tid=%u] Thread done\n", dwTid);
return 0;
}
int __cdecl main(int argc, char **argv)
{
DWORD dwThreadId;
DWORD dwRet;
HANDLE hThreads[MAX_THREAD_COUNT] = { 0 };
int iThreadCount = 0;
int i, iVal;
if ((PAL_Initialize(argc,argv)) != 0)
{
return(FAIL);
}
srand(time(NULL));
for (i=1; i<argc; i++)
{
if ('-' == *argv[i])
{
switch(*(argv[i]+1))
{
case 'n':
if (i < argc-1)
{
i += 1;
iVal = atoi(argv[i]);
if (0 < iVal)
{
g_iLoopCount = iVal;
}
}
break;
case 't':
if (i < argc-1)
{
i += 1;
iVal = atoi(argv[i]);
if (0 < iVal && MAX_THREAD_COUNT >= iVal)
{
g_iThreadCount = iVal;
}
}
break;
default:
break;
}
}
}
Trace ("Iterations:\t%d\n", g_iLoopCount);
Trace ("Threads:\t%d\n", g_iThreadCount);
g_hEvStart = CreateEvent(NULL, TRUE, FALSE, NULL);
if (g_hEvStart == NULL)
{
Fail("CreateEvent call failed. GetLastError "
"returned %u.\n", GetLastError());
}
InitializeCriticalSection(&g_cs);
for (i=0;i<g_iThreadCount;i++)
{
hThreads[iThreadCount] = CreateThread(NULL,
0,
&Thread,
(LPVOID) NULL,
0,
&dwThreadId);
if (NULL != hThreads[iThreadCount])
{
iThreadCount++;
}
}
Sleep(100);
Trace("Created %d client threads\n", g_iThreadCount);
if (2 > iThreadCount)
{
Fail("Failed to create minimum number if threads, i.e. 2\n");
}
if (!SetEvent(g_hEvStart))
{
Fail("SetEvent failed [GetLastError()=%u]\n", GetLastError());
}
for (i=0; i<iThreadCount; i+=64)
{
dwRet = WaitForMultipleObjects(MIN(iThreadCount-i,64),
hThreads+i,
TRUE,
INFINITE);
if (WAIT_OBJECT_0 != dwRet)
{
Fail("Wait for all threads failed\n");
}
}
PAL_Terminate();
return (PASS);
}
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