Colony » Colony Scout » Colony Scout OS

/*

 * Copyright (c) 2005, Kohsuke Ohtani

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

/*

 * mutex.c - test priority inheritance of mutex.

 */

#include <sys/prex.h>

#include <stdio.h>

static mutex_t mtx_A = MUTEX_INITIALIZER;

static mutex_t mtx_B, mtx_C;

int

main(int argc, char *argv[])

{

        int error;

        printf("Mutex test program\n");

        /*

         * Initialize only B

         */

        mutex_init(&mtx_B);

        /*

         * Lock test

         */

        error = mutex_lock(&mtx_A);

        printf("1) Lock mutex A: error=%d\n", error);

        error = mutex_lock(&mtx_B);

        printf("2) Lock mutex B: error=%d\n", error);

        /* Error: Mutex C is not initialized. */

        error = mutex_lock(&mtx_C);

        printf("3e) Lock mutex C: error=%d\n", error);

        /*

         * Unlock test

         */

        error = mutex_unlock(&mtx_A);

        printf("4) Unlock mutex A: error=%d\n", error);

        error = mutex_unlock(&mtx_B);

        printf("5) Unlock mutex B: error=%d\n", error);

        /* Error: Mutex C is not initialized. */

        error = mutex_unlock(&mtx_C);

        printf("6e) Unlock mutex B: error=%d\n", error);

        /* Error: B is not locked. */

        error = mutex_unlock(&mtx_B);

        printf("7e) Unlock mutex B: error=%d\n", error);

        /*

         * Destoroy mutex.

         */

        mutex_destroy(&mtx_B);

        /* Error: Mutex B is destoroyed. */

        error = mutex_lock(&mtx_B);

        printf("8e) Lock mutex B: error=%d\n", error);

        /*

         * Double lock test

         */

        error = mutex_lock(&mtx_A);

        printf("9) Lock mutex A: error=%d\n", error);

        /* Erorr: Mutex A is already locked */

        error = mutex_lock(&mtx_A);

        printf("10e) Lock mutex A: error=%d\n", error);

        error = mutex_unlock(&mtx_A);

        printf("11) Unlock mutex A: error=%d\n", error);

        printf("Test completed...\n");

        return 0;

}