[lttng-ust.git] / liblttng-ust / error.h

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LTTNG_ERROR_H
#define _LTTNG_ERROR_H

#include <urcu/compiler.h>
#include <unistd.h>

#define MAX_ERRNO	4095

static inline
int IS_ERR_VALUE(long value)
{
	if (caa_unlikely((unsigned long) value >= (unsigned long) -MAX_ERRNO))
		return 1;
	else
		return 0;
}

static inline
void *ERR_PTR(long error)
{
	return (void *) error;
}

static inline
long PTR_ERR(const void *ptr)
{
	return (long) ptr;
}

static inline
int IS_ERR(const void *ptr)
{
	return IS_ERR_VALUE((long) ptr);
}

#endif /* _LTTNG_ERROR_H */
Commit	Line	Data
8f3f8c99	1	/*
c0c0989a	2	* SPDX-License-Identifier: LGPL-2.1-only
8f3f8c99	3	*
c0c0989a	4	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8f3f8c99 MD	5	*/
8f3f8c99 MD	6
c0c0989a MJ	7	#ifndef _LTTNG_ERROR_H
	8	#define _LTTNG_ERROR_H
	9
8f3f8c99 MD	10	#include <urcu/compiler.h>
	11	#include <unistd.h>
	12
	13	#define MAX_ERRNO 4095
	14
	15	static inline
	16	int IS_ERR_VALUE(long value)
	17	{
	18	if (caa_unlikely((unsigned long) value >= (unsigned long) -MAX_ERRNO))
	19	return 1;
	20	else
	21	return 0;
	22	}
	23
	24	static inline
	25	void *ERR_PTR(long error)
	26	{
	27	return (void *) error;
	28	}
	29
	30	static inline
	31	long PTR_ERR(const void *ptr)
	32	{
	33	return (long) ptr;
	34	}
	35
	36	static inline
	37	int IS_ERR(const void *ptr)
	38	{
	39	return IS_ERR_VALUE((long) ptr);
	40	}
	41
	42	#endif /* _LTTNG_ERROR_H */