Fix compilation with uclibc

[ust.git] / include / usterr.h

/* Copyright (C) 2009  Pierre-Marc Fournier
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 */

#ifndef _USTERR_H
#define _USTERR_H

#include <string.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>

#include <ust/core.h>

#include "share.h"

#ifndef UST_COMPONENT
#define UST_COMPONENT libust
#endif

/* To stringify the expansion of a define */
#define XSTR(d) STR(d)
#define STR(s) #s

/* A dummy function to force format checking */
static inline void __attribute__ ((format (printf, 1, 2)))
	__check_ust_safe_fmt(const char *fmt, ...)
{
}

#define UST_STR_COMPONENT XSTR(UST_COMPONENT)

#define ERRMSG(fmt, args...) do { fprintf(stderr, UST_STR_COMPONENT "[%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" XSTR(__LINE__) ")\n", (long) getpid(), (long) syscall(SYS_gettid), ## args, __func__); } while(0)

#ifdef UST_DEBUG
# define DBG(fmt, args...) ERRMSG(fmt, ## args)
# define DBG_raw(fmt, args...) do { fprintf(stderr, fmt, ## args); } while(0)
#else
# define DBG(fmt, args...) __check_ust_safe_fmt(fmt, ## args)
# define DBG_raw(fmt, args...) __check_ust_safe_fmt(fmt, ## args)
#endif
#define WARN(fmt, args...) ERRMSG("Warning: " fmt, ## args)
#define ERR(fmt, args...) ERRMSG("Error: " fmt, ## args)
#define BUG(fmt, args...) ERRMSG("BUG: " fmt, ## args)

#if (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE)
#define PERROR(call, args...)\
	do { \
		char buf[200] = "Error in strerror_r()"; \
		strerror_r(errno, buf, sizeof(buf)); \
		ERRMSG("Error: " call ": %s", ## args, buf); \
	} while(0);
#else
#define PERROR(call, args...)\
	do { \
		char *buf; \
		char tmp[200]; \
		buf = strerror_r(errno, tmp, sizeof(tmp)); \
		ERRMSG("Error: " call ": %s", ## args, buf); \
	} while(0);
#endif

#define BUG_ON(condition) do { if (unlikely(condition)) ERR("condition not respected (BUG)"); } while(0)
#define WARN_ON(condition) do { if (unlikely(condition)) WARN("condition not respected on line %s:%d", __FILE__, __LINE__); } while(0)
#define WARN_ON_ONCE(condition) WARN_ON(condition)

#endif /* _USTERR_H */