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/*-
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 * Copyright (c) 2005, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * sem.c - test program for semaphore.
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 */
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#include <sys/prex.h>
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#include <stdio.h>
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int
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main(int argc, char *argv[])
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{
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        sem_t sem;
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        int error;
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        u_int val;
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        printf("Semaphore test program\n");
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        /*
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         * Test initialize
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         */
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        sem_init(&sem, 3);
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        /*
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         * Test wait
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         */
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        error = sem_getvalue(&sem, &val);
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        printf("Semaphore value=%d\n", val);
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        printf("1) Wait semahore\n");
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        error = sem_wait(&sem, 0);
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        if (error)
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                panic("wait error");
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        error = sem_getvalue(&sem, &val);
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        printf("Semaphore value=%d\n", val);
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        printf("2) Wait semahore\n");
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        error = sem_wait(&sem, 0);
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        if (error)
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                panic("wait error");
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        error = sem_getvalue(&sem, &val);
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        printf("Semaphore value=%d\n", val);
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        printf("3) Wait semahore\n");
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        error = sem_wait(&sem, 0);
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        if (error)
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                panic("wait error");
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        error = sem_getvalue(&sem, &val);
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        printf("Semaphore value=%d\n", val);
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#if 0
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        /*
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         * Sleep by wait
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         */
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        printf("4) Wait semahore\n");
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        error = sem_wait(&sem, 0);
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        if (error)
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                panic("wait error");
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#endif
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        /*
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         * trywait must be error.
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         */
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        printf("4e) Try to wait semahore\n");
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        error = sem_trywait(&sem);
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        printf("Try wait error=%d\n", error);
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        /*
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         * Test post
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         */
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        printf("5) Post semahore\n");
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        error = sem_post(&sem);
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        if (error)
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                panic("post error");
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        error = sem_getvalue(&sem, &val);
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        printf("Semaphore value=%d\n", val);
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        printf("Test complete\n");
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        return 0;
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}