File: [local] / prex-old / usr / test / mutex / mutex.c (download)
Revision 1.1.1.1 (vendor branch), Tue Jun 3 09:38:52 2008 UTC (16 years, 3 months ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, PREX_0_7_BASE, HEAD Changes since 1.1: +0 -0 lines
Yeah, this is an initial import of Prex, portable real-time microkernel
operating system. I wanna hack it for non-profit but fun, so let it in.
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/*
* 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 inheritence of mutex.
*/
#include <prex/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 err;
printf("Mutex test program\n");
/*
* Initialize only B
*/
mutex_init(&mtx_B);
/*
* Lock test
*/
err = mutex_lock(&mtx_A);
printf("1) Lock mutex A: err=%d\n", err);
err = mutex_lock(&mtx_B);
printf("2) Lock mutex B: err=%d\n", err);
/* Error: Mutex C is not initialized. */
err = mutex_lock(&mtx_C);
printf("3e) Lock mutex C: err=%d\n", err);
/*
* Unlock test
*/
err = mutex_unlock(&mtx_A);
printf("4) Unlock mutex A: err=%d\n", err);
err = mutex_unlock(&mtx_B);
printf("5) Unlock mutex B: err=%d\n", err);
/* Error: Mutex C is not initialized. */
err = mutex_unlock(&mtx_C);
printf("6e) Unlock mutex B: err=%d\n", err);
/* Error: B is not locked. */
err = mutex_unlock(&mtx_B);
printf("7e) Unlock mutex B: err=%d\n", err);
/*
* Destoroy mutex.
*/
mutex_destroy(&mtx_B);
/* Error: Mutex B is destoroyed. */
err = mutex_lock(&mtx_B);
printf("8e) Lock mutex B: err=%d\n", err);
/*
* Double lock test
*/
err = mutex_lock(&mtx_A);
printf("9) Lock mutex A: err=%d\n", err);
/* Erorr: Mutex A is already locked */
err = mutex_lock(&mtx_A);
printf("10e) Lock mutex A: err=%d\n", err);
err = mutex_unlock(&mtx_A);
printf("11) Unlock mutex A: err=%d\n", err);
return 0;
}