/*
* Copyright (c) 2015 embedded brains GmbH
* 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.
*
* 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 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.
*/
#ifndef _LINUX_ERR_H
#define _LINUX_ERR_H
#include <linux/compiler.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define IS_ERR_VALUE(e) unlikely((e) >= (unsigned long)-4095)
static inline void *
__must_check ERR_PTR(long e)
{
return ((void *)e);
}
static inline long __must_check
PTR_ERR(__force const void *p)
{
return ((long)p);
}
static inline bool __must_check
IS_ERR(__force const void *p)
{
return (IS_ERR_VALUE((unsigned long)p));
}
static inline bool __must_check
IS_ERR_OR_NULL(__force const void *p)
{
return (p == NULL || IS_ERR_VALUE((unsigned long)p));
}
static inline void * __must_check
ERR_CAST(__force const void *p)
{
return (__DECONST(void *, p));
}
static inline int __must_check
PTR_ERR_OR_ZERO(__force const void *p)
{
return (IS_ERR(p) ? (int)PTR_ERR(p) : 0);
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _LINUX_ERR_H */
