mpmutex.h

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/****************************************************************************
 * modules/include/asmp/mpmutex.h
 *
 *   Copyright 2018 Sony Semiconductor Solutions Corporation
 *
 * 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 Sony Semiconductor Solutions Corporation nor
 *    the names of its contributors may be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT OWNER 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
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 *
 ****************************************************************************/
#ifndef __INCLUDE_ASMP_MPMUTEX_H
#define __INCLUDE_ASMP_MPMUTEX_H
 
#include <sys/types.h>
#include <asmp/types.h>
 
typedef struct mpmutex
{
  mpobj_t     super;            
  int         fd;               
  int8_t      tag;              
} mpmutex_t;
 
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
 
/********************************************************************************
 * Public Function Prototypes
 ********************************************************************************/
int mpmutex_init(mpmutex_t *mutex, key_t key);
 
int mpmutex_destroy(mpmutex_t *mutex);
 
int mpmutex_lock(mpmutex_t *mutex);
 
int mpmutex_trylock(mpmutex_t *mutex);
 
int mpmutex_unlock(mpmutex_t *mutex);
 
#undef EXTERN
#ifdef __cplusplus
}
#endif
 
#endif /* __INCLUDE_ASMP_MPMUTEX_H */