122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
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/*
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* File: semaphore3.c
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*
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*
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* --------------------------------------------------------------------------
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*
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* Pthreads-win32 - POSIX Threads Library for Win32
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* Copyright(C) 1998 John E. Bossom
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* Copyright(C) 1999,2005 Pthreads-win32 contributors
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*
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* Contact Email: rpj@callisto.canberra.edu.au
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*
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* The current list of contributors is contained
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* in the file CONTRIBUTORS included with the source
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* code distribution. The list can also be seen at the
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* following World Wide Web location:
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* http://sources.redhat.com/pthreads-win32/contributors.html
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING.LIB;
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* if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* --------------------------------------------------------------------------
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*
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* Test Synopsis: Verify sem_getvalue returns the correct number of waiters.
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* -
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*
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* Test Method (Validation or Falsification):
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* - Validation
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*
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* Requirements Tested:
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* -
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*
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* Features Tested:
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* -
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*
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* Cases Tested:
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* -
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*
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* Description:
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* -
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*
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* Environment:
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* -
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*
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* Input:
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* - None.
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*
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* Output:
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* - File name, Line number, and failed expression on failure.
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* - No output on success.
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*
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* Assumptions:
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* -
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*
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* Pass Criteria:
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* - Process returns zero exit status.
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*
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* Fail Criteria:
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* - Process returns non-zero exit status.
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*/
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#include "test.h"
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#define MAX_COUNT 100
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sem_t s;
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void *
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thr (void * arg)
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{
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assert(sem_wait(&s) == 0);
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assert(pthread_detach(pthread_self()) == 0);
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return NULL;
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}
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int
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main()
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{
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int value = 0;
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int i;
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pthread_t t[MAX_COUNT+1];
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assert(sem_init(&s, PTHREAD_PROCESS_PRIVATE, 0) == 0);
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assert(sem_getvalue(&s, &value) == 0);
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// printf("Value = %d\n", value); fflush(stdout);
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assert(value == 0);
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for (i = 1; i <= MAX_COUNT; i++)
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{
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assert(pthread_create(&t[i], NULL, thr, NULL) == 0);
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do {
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sched_yield();
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assert(sem_getvalue(&s, &value) == 0);
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} while (value != -i);
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// printf("Value = %d\n", value); fflush(stdout);
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assert(-value == i);
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}
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for (i = MAX_COUNT - 1; i >= 0; i--)
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{
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assert(sem_post(&s) == 0);
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assert(sem_getvalue(&s, &value) == 0);
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// printf("Value = %d\n", value); fflush(stdout);
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assert(-value == i);
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}
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return 0;
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}
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