my_os2mutex.c
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上传日期:2022-05-23
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文件大小:3k
- /*
- * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
- * All rights reserved.
- *
- * Modified and extended by Antony T Curtis <antony.curtis@olcs.net>
- * for use with OS/2.
- *
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by John Birrell.
- * 4. 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 JOHN BIRRELL 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 REGENTS 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.
- *
- */
- #include <stdlib.h>
- #include <errno.h>
- #ifdef _THREAD_SAFE
- int
- pthread_mutex_init(pthread_mutex_t * mutex,
- const pthread_mutexattr_t * mutex_attr)
- {
- (void) DosCreateMutexSem(NULL,mutex,0,0);
- return (0); /* Return the completion status: */
- }
- int
- pthread_mutex_destroy(pthread_mutex_t * mutex)
- {
- APIRET rc;
- do
- {
- rc = DosCloseMutexSem(*mutex);
- if (rc == 301) DosReleaseMutexSem(*mutex);
- } while (rc == 301);
- *mutex = 0;
- return (0); /* Return the completion status: */
- }
- int
- pthread_mutex_lock(pthread_mutex_t * mutex)
- {
- APIRET rc;
- rc = DosRequestMutexSem(*mutex,SEM_INDEFINITE_WAIT);
- if (rc)
- return(EINVAL);
- return (0); /* Return the completion status: */
- }
- int
- pthread_mutex_unlock(pthread_mutex_t * mutex)
- {
- (void) DosReleaseMutexSem(*mutex);
- return (0); /* Return the completion status: */
- }
- #endif