root / prex-0.9.0 / usr / test / mutex / mutex.c @ 03e9c04a
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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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* mutex.c - test priority inheritance of mutex.
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*/
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#include <sys/prex.h> |
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#include <stdio.h> |
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static mutex_t mtx_A = MUTEX_INITIALIZER;
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static mutex_t mtx_B, mtx_C;
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int
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main(int argc, char *argv[]) |
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{ |
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int error;
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printf("Mutex test program\n");
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/*
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* Initialize only B
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*/
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mutex_init(&mtx_B); |
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/*
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* Lock test
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*/
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error = mutex_lock(&mtx_A); |
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printf("1) Lock mutex A: error=%d\n", error);
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error = mutex_lock(&mtx_B); |
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printf("2) Lock mutex B: error=%d\n", error);
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/* Error: Mutex C is not initialized. */
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error = mutex_lock(&mtx_C); |
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printf("3e) Lock mutex C: error=%d\n", error);
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/*
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* Unlock test
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*/
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error = mutex_unlock(&mtx_A); |
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printf("4) Unlock mutex A: error=%d\n", error);
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error = mutex_unlock(&mtx_B); |
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printf("5) Unlock mutex B: error=%d\n", error);
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/* Error: Mutex C is not initialized. */
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error = mutex_unlock(&mtx_C); |
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printf("6e) Unlock mutex B: error=%d\n", error);
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/* Error: B is not locked. */
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error = mutex_unlock(&mtx_B); |
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printf("7e) Unlock mutex B: error=%d\n", error);
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/*
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* Destoroy mutex.
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*/
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mutex_destroy(&mtx_B); |
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/* Error: Mutex B is destoroyed. */
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error = mutex_lock(&mtx_B); |
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printf("8e) Lock mutex B: error=%d\n", error);
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/*
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* Double lock test
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*/
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error = mutex_lock(&mtx_A); |
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printf("9) Lock mutex A: error=%d\n", error);
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/* Erorr: Mutex A is already locked */
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error = mutex_lock(&mtx_A); |
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printf("10e) Lock mutex A: error=%d\n", error);
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error = mutex_unlock(&mtx_A); |
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printf("11) Unlock mutex A: error=%d\n", error);
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printf("Test completed...\n");
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return 0; |
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} |