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/*
* File: reuse2.c
*
*
* --------------------------------------------------------------------------
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999,2005 Pthreads-win32 contributors
*
* Contact Email: rpj@callisto.canberra.edu.au
*
* The current list of contributors is contained
* in the file CONTRIBUTORS included with the source
* code distribution. The list can also be seen at the
* following World Wide Web location:
* http://sources.redhat.com/pthreads-win32/contributors.html
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library in the file COPYING.LIB;
* if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* --------------------------------------------------------------------------
*
* Test Synopsis:
* - Test that thread reuse works for detached threads.
* - Analyse thread struct reuse.
*
* Test Method (Validation or Falsification):
* -
*
* Requirements Tested:
* -
*
* Features Tested:
* -
*
* Cases Tested:
* -
*
* Description:
* -
*
* Environment:
* - This test is implementation specific
* because it uses knowledge of internals that should be
* opaque to an application.
*
* Input:
* - None.
*
* Output:
* - File name, Line number, and failed expression on failure.
* - No output on success.
*
* Assumptions:
* -
*
* Pass Criteria:
* - Process returns zero exit status.
*
* Fail Criteria:
* - Process returns non-zero exit status.
*/
#include "test.h"
/*
*/
enum {
NUMTHREADS = 10000
};
static long done = 0;
void * func(void * arg)
{
sched_yield();
InterlockedIncrement(&done);
return (void *) 0;
}
int
main()
{
pthread_t t[NUMTHREADS];
pthread_attr_t attr;
int i;
unsigned int notUnique = 0,
totalHandles = 0,
reuseMax = 0,
reuseMin = NUMTHREADS;
assert(pthread_attr_init(&attr) == 0);
assert(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) == 0);
for (i = 0; i < NUMTHREADS; i++)
{
while(pthread_create(&t[i], &attr, func, NULL) != 0)
Sleep(1);
}
while (NUMTHREADS > InterlockedExchangeAdd((LPLONG)&done, 0L))
Sleep(100);
Sleep(100);
/*
* Analyse reuse by computing min and max number of times pthread_create()
* returned the same pthread_t value.
*/
for (i = 0; i < NUMTHREADS; i++)
{
if (t[i].p != NULL)
{
unsigned int j, thisMax;
thisMax = t[i].x;
for (j = i+1; j < NUMTHREADS; j++)
if (t[i].p == t[j].p)
{
if (t[i].x == t[j].x)
notUnique++;
if (thisMax < t[j].x)
thisMax = t[j].x;
t[j].p = NULL;
}
if (reuseMin > thisMax)
reuseMin = thisMax;
if (reuseMax < thisMax)
reuseMax = thisMax;
}
}
for (i = 0; i < NUMTHREADS; i++)
if (t[i].p != NULL)
totalHandles++;
/*
* pthread_t reuse counts start at 0, so we need to add 1
* to the max and min values derived above.
*/
printf("For %d total threads:\n", NUMTHREADS);
printf("Non-unique IDs = %d\n", notUnique);
printf("Reuse maximum = %d\n", reuseMax + 1);
printf("Reuse minimum = %d\n", reuseMin + 1);
printf("Total handles = %d\n", totalHandles);
return 0;
}
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