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Annotation of prex-old/usr/test/mutex/mutex.c, Revision 1.1.1.1

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: }