121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
|
|
* File: semaphore3.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.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*
|
|
* --------------------------------------------------------------------------
|
|
*
|
|
* Test Synopsis: Verify sem_getvalue returns the correct number of waiters.
|
|
* -
|
|
*
|
|
* Test Method (Validation or Falsification):
|
|
* - Validation
|
|
*
|
|
* Requirements Tested:
|
|
* -
|
|
*
|
|
* Features Tested:
|
|
* -
|
|
*
|
|
* Cases Tested:
|
|
* -
|
|
*
|
|
* Description:
|
|
* -
|
|
*
|
|
* Environment:
|
|
* -
|
|
*
|
|
* 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"
|
|
|
|
#define MAX_COUNT 100
|
|
|
|
sem_t s;
|
|
|
|
void *
|
|
thr (void * arg)
|
|
{
|
|
assert(sem_wait(&s) == 0);
|
|
assert(pthread_detach(pthread_self()) == 0);
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
main()
|
|
{
|
|
int value = 0;
|
|
int i;
|
|
pthread_t t[MAX_COUNT+1];
|
|
|
|
assert(sem_init(&s, PTHREAD_PROCESS_PRIVATE, 0) == 0);
|
|
assert(sem_getvalue(&s, &value) == 0);
|
|
// printf("Value = %d\n", value); fflush(stdout);
|
|
assert(value == 0);
|
|
|
|
for (i = 1; i <= MAX_COUNT; i++)
|
|
{
|
|
assert(pthread_create(&t[i], NULL, thr, NULL) == 0);
|
|
do {
|
|
sched_yield();
|
|
assert(sem_getvalue(&s, &value) == 0);
|
|
} while (value != -i);
|
|
// printf("Value = %d\n", value); fflush(stdout);
|
|
assert(-value == i);
|
|
}
|
|
|
|
for (i = MAX_COUNT - 1; i >= 0; i--)
|
|
{
|
|
assert(sem_post(&s) == 0);
|
|
assert(sem_getvalue(&s, &value) == 0);
|
|
// printf("Value = %d\n", value); fflush(stdout);
|
|
assert(-value == i);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|