mirror of https://github.com/PCSX2/pcsx2.git
119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
/*
|
|
* barrier5.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
|
|
*
|
|
* --------------------------------------------------------------------------
|
|
*
|
|
* Set up a series of barriers at different heights and test various numbers
|
|
* of threads accessing, especially cases where there are more threads than the
|
|
* barrier height (count), i.e. test contention when the barrier is released.
|
|
*/
|
|
|
|
#include "test.h"
|
|
|
|
enum {
|
|
NUMTHREADS = 15,
|
|
HEIGHT = 10,
|
|
BARRIERMULTIPLE = 1000
|
|
};
|
|
|
|
pthread_barrier_t barrier = NULL;
|
|
pthread_mutex_t mx = PTHREAD_MUTEX_INITIALIZER;
|
|
LONG totalThreadCrossings;
|
|
|
|
void *
|
|
func(void * crossings)
|
|
{
|
|
int result;
|
|
int serialThreads = 0;
|
|
|
|
while ((LONG)(size_t)crossings >= (LONG)InterlockedIncrement((LPLONG)&totalThreadCrossings))
|
|
{
|
|
result = pthread_barrier_wait(&barrier);
|
|
|
|
if (result == PTHREAD_BARRIER_SERIAL_THREAD)
|
|
{
|
|
serialThreads++;
|
|
}
|
|
else if (result != 0)
|
|
{
|
|
printf("Barrier failed: result = %s\n", error_string[result]);
|
|
fflush(stdout);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return (void*)(size_t)serialThreads;
|
|
}
|
|
|
|
int
|
|
main()
|
|
{
|
|
int i, j;
|
|
void* result;
|
|
int serialThreadsTotal;
|
|
LONG Crossings;
|
|
pthread_t t[NUMTHREADS + 1];
|
|
|
|
for (j = 1; j <= NUMTHREADS; j++)
|
|
{
|
|
int height = j<HEIGHT?j:HEIGHT;
|
|
|
|
totalThreadCrossings = 0;
|
|
Crossings = height * BARRIERMULTIPLE;
|
|
|
|
printf("Threads=%d, Barrier height=%d\n", j, height);
|
|
|
|
assert(pthread_barrier_init(&barrier, NULL, height) == 0);
|
|
|
|
for (i = 1; i <= j; i++)
|
|
{
|
|
assert(pthread_create(&t[i], NULL, func, (void *)(size_t)Crossings) == 0);
|
|
}
|
|
|
|
serialThreadsTotal = 0;
|
|
for (i = 1; i <= j; i++)
|
|
{
|
|
assert(pthread_join(t[i], &result) == 0);
|
|
serialThreadsTotal += (int)(size_t)result;
|
|
}
|
|
|
|
assert(serialThreadsTotal == BARRIERMULTIPLE);
|
|
|
|
assert(pthread_barrier_destroy(&barrier) == 0);
|
|
}
|
|
|
|
assert(pthread_mutex_destroy(&mx) == 0);
|
|
|
|
return 0;
|
|
}
|