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88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/* $NetBSD: err.h,v 1.1 2015/08/18 21:10:56 skrll Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_ERR_H_
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#define _LINUX_ERR_H_
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/* XXX Linux uses long and int inconsistently here. Hope this works out. */
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/systm.h>
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#define MAX_ERRNO ELAST
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static inline bool
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IS_ERR_VALUE(uintptr_t n)
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{
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return (n >= (uintptr_t)-MAX_ERRNO);
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}
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static inline void *
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ERR_PTR(long error)
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{
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KASSERT(error < 0);
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return (void *)(intptr_t)error;
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}
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static inline long
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PTR_ERR(const void *ptr)
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{
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KASSERT(ptr == (void *)(intptr_t)(long)(intptr_t)ptr); /* XXX Hurk! */
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return (long)(intptr_t)ptr;
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}
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static inline bool
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IS_ERR(const void *ptr)
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{
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return IS_ERR_VALUE((uintptr_t)ptr);
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}
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static inline bool
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IS_ERR_OR_NULL(const void *ptr)
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{
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return ((ptr == NULL) || IS_ERR(ptr));
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}
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static inline void *
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ERR_CAST(void *ptr) /* XXX Linux declares with const. */
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{
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return ptr;
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}
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static inline long
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PTR_RET(const void *ptr)
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{
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return (IS_ERR(ptr)? PTR_ERR(ptr) : 0);
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}
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#endif /* _LINUX_ERR_H_ */
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