[lttng-ust.git] / include / usterr.h

#ifndef _USTERR_H
#define _USTERR_H

/*
 * Copyright (C) 2009  Pierre-Marc Fournier
 * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * 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; version 2.1 of
 * the License.
 *
 * 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
 */

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

#include <lttng/core.h>
#include "lttng/share.h"

enum ust_loglevel {
	UST_LOGLEVEL_UNKNOWN = 0,
	UST_LOGLEVEL_NORMAL,
	UST_LOGLEVEL_DEBUG,
};

extern volatile enum ust_loglevel ust_loglevel;
void init_usterr(void);

static inline int ust_debug(void)
{
	return ust_loglevel == UST_LOGLEVEL_DEBUG;
}

#ifndef UST_COMPONENT
#define UST_COMPONENT libust
#endif

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

#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...)					\
	do {							\
		if (ust_debug())				\
			ERRMSG(fmt, ## args);			\
	} while (0)
# define DBG_raw(fmt, args...)					\
	do {							\
		if (ust_debug()) {				\
			fprintf(stderr, fmt, ## args);		\
		}						\
	} while(0)
#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 (caa_unlikely(condition))			\
			ERR("condition not respected (BUG) on line %s:%d", __FILE__, __LINE__);	\
	} while(0)
#define WARN_ON(condition)					\
	do {							\
		if (caa_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 */
Commit	Line	Data
	1	#ifndef _USTERR_H
	2	#define _USTERR_H
	3
	4	/*
	5	* Copyright (C) 2009 Pierre-Marc Fournier
	6	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	7	*
	8	* This library is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU Lesser General Public
	10	* License as published by the Free Software Foundation; version 2.1 of
	11	* the License.
	12	*
	13	* This library is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* Lesser General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU Lesser General Public
	19	* License along with this library; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	21	*/
	22
	23	#include <string.h>
	24	#include <sys/types.h>
	25	#include <sys/syscall.h>
	26	#include <errno.h>
	27	#include <stdarg.h>
	28	#include <stdio.h>
	29
	30	#include <lttng/core.h>
	31	#include "lttng/share.h"
	32
	33	enum ust_loglevel {
	34	UST_LOGLEVEL_UNKNOWN = 0,
	35	UST_LOGLEVEL_NORMAL,
	36	UST_LOGLEVEL_DEBUG,
	37	};
	38
	39	extern volatile enum ust_loglevel ust_loglevel;
	40	void init_usterr(void);
	41
	42	static inline int ust_debug(void)
	43	{
	44	return ust_loglevel == UST_LOGLEVEL_DEBUG;
	45	}
	46
	47	#ifndef UST_COMPONENT
	48	#define UST_COMPONENT libust
	49	#endif
	50
	51	/* To stringify the expansion of a define */
	52	#define XSTR(d) STR(d)
	53	#define STR(s) #s
	54
	55	#define UST_STR_COMPONENT XSTR(UST_COMPONENT)
	56
	57	#define ERRMSG(fmt, args...) \
	58	do { \
	59	fprintf(stderr, UST_STR_COMPONENT "[%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" XSTR(__LINE__) ")\n", \
	60	(long) getpid(), \
	61	(long) syscall(SYS_gettid), \
	62	## args, \
	63	__func__); \
	64	} while(0)
	65
	66	#ifdef UST_DEBUG
	67	# define DBG(fmt, args...) ERRMSG(fmt, ## args)
	68	# define DBG_raw(fmt, args...) \
	69	do { \
	70	fprintf(stderr, fmt, ## args); \
	71	} while(0)
	72	#else
	73	# define DBG(fmt, args...) \
	74	do { \
	75	if (ust_debug()) \
	76	ERRMSG(fmt, ## args); \
	77	} while (0)
	78	# define DBG_raw(fmt, args...) \
	79	do { \
	80	if (ust_debug()) { \
	81	fprintf(stderr, fmt, ## args); \
	82	} \
	83	} while(0)
	84	#endif
	85
	86	#define WARN(fmt, args...) ERRMSG("Warning: " fmt, ## args)
	87	#define ERR(fmt, args...) ERRMSG("Error: " fmt, ## args)
	88	#define BUG(fmt, args...) ERRMSG("BUG: " fmt, ## args)
	89
	90	#if (_POSIX_C_SOURCE >= 200112L \|\| _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE)
	91	#define PERROR(call, args...)\
	92	do { \
	93	char buf[200] = "Error in strerror_r()"; \
	94	strerror_r(errno, buf, sizeof(buf)); \
	95	ERRMSG("Error: " call ": %s", ## args, buf); \
	96	} while(0);
	97	#else
	98	#define PERROR(call, args...)\
	99	do { \
	100	char *buf; \
	101	char tmp[200]; \
	102	buf = strerror_r(errno, tmp, sizeof(tmp)); \
	103	ERRMSG("Error: " call ": %s", ## args, buf); \
	104	} while(0);
	105	#endif
	106
	107	#define BUG_ON(condition) \
	108	do { \
	109	if (caa_unlikely(condition)) \
	110	ERR("condition not respected (BUG) on line %s:%d", __FILE__, __LINE__); \
	111	} while(0)
	112	#define WARN_ON(condition) \
	113	do { \
	114	if (caa_unlikely(condition)) \
	115	WARN("condition not respected on line %s:%d", __FILE__, __LINE__); \
	116	} while(0)
	117	#define WARN_ON_ONCE(condition) WARN_ON(condition)
	118
	119	#endif /* _USTERR_H */