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Annotation of prex-old/usr/test/mutex/mutex.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: /*
        !            31:  * mutex.c - test priority inheritence of mutex.
        !            32:  */
        !            33:
        !            34: #include <prex/prex.h>
        !            35: #include <stdio.h>
        !            36:
        !            37: static mutex_t mtx_A = MUTEX_INITIALIZER;
        !            38: static mutex_t mtx_B, mtx_C;
        !            39:
        !            40: int
        !            41: main(int argc, char *argv[])
        !            42: {
        !            43:        int err;
        !            44:
        !            45:        printf("Mutex test program\n");
        !            46:
        !            47:        /*
        !            48:         * Initialize only B
        !            49:         */
        !            50:        mutex_init(&mtx_B);
        !            51:
        !            52:        /*
        !            53:         * Lock test
        !            54:         */
        !            55:        err = mutex_lock(&mtx_A);
        !            56:        printf("1) Lock mutex A: err=%d\n", err);
        !            57:
        !            58:        err = mutex_lock(&mtx_B);
        !            59:        printf("2) Lock mutex B: err=%d\n", err);
        !            60:
        !            61:        /* Error: Mutex C is not initialized. */
        !            62:        err = mutex_lock(&mtx_C);
        !            63:        printf("3e) Lock mutex C: err=%d\n", err);
        !            64:
        !            65:        /*
        !            66:         * Unlock test
        !            67:         */
        !            68:        err = mutex_unlock(&mtx_A);
        !            69:        printf("4) Unlock mutex A: err=%d\n", err);
        !            70:
        !            71:        err = mutex_unlock(&mtx_B);
        !            72:        printf("5) Unlock mutex B: err=%d\n", err);
        !            73:
        !            74:        /* Error: Mutex C is not initialized. */
        !            75:        err = mutex_unlock(&mtx_C);
        !            76:        printf("6e) Unlock mutex B: err=%d\n", err);
        !            77:
        !            78:        /* Error: B is not locked. */
        !            79:        err = mutex_unlock(&mtx_B);
        !            80:        printf("7e) Unlock mutex B: err=%d\n", err);
        !            81:
        !            82:        /*
        !            83:         * Destoroy mutex.
        !            84:         */
        !            85:        mutex_destroy(&mtx_B);
        !            86:
        !            87:        /* Error: Mutex B is destoroyed. */
        !            88:        err = mutex_lock(&mtx_B);
        !            89:        printf("8e) Lock mutex B: err=%d\n", err);
        !            90:
        !            91:        /*
        !            92:         * Double lock test
        !            93:         */
        !            94:        err = mutex_lock(&mtx_A);
        !            95:        printf("9) Lock mutex A: err=%d\n", err);
        !            96:
        !            97:        /* Erorr: Mutex A is already locked */
        !            98:        err = mutex_lock(&mtx_A);
        !            99:        printf("10e) Lock mutex A: err=%d\n", err);
        !           100:
        !           101:        err = mutex_unlock(&mtx_A);
        !           102:        printf("11) Unlock mutex A: err=%d\n", err);
        !           103:
        !           104:        return 0;
        !           105: }