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

#ifndef _UST_COMPAT_H
#define _UST_COMPAT_H

/*
 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 * Copyright (C) 2016 Raphaël Beamonte <raphael.beamonte@gmail.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; only
 * 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 <pthread.h>

/*
 * Limit imposed by Linux UST-sessiond ABI.
 */
#define LTTNG_UST_PROCNAME_LEN 17

#define LTTNG_UST_PROCNAME_SUFFIX "-ust"


#if defined(HAVE_PTHREAD_SETNAME_NP_WITH_TID)
static inline
int lttng_pthread_setname_np(const char *name)
{
        return pthread_setname_np(pthread_self(), name);
}

static inline
int lttng_pthread_getname_np(char *name, size_t len)
{
        return pthread_getname_np(pthread_self(), name, len);
}
#elif defined(HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID)
static inline
int lttng_pthread_setname_np(const char *name)
{
        return pthread_setname_np(name);
}

static inline
int lttng_pthread_getname_np(char *name, size_t len)
{
        return pthread_getname_np(name, len);
}
#else
/*
 * For platforms without thread name support, do nothing.
 */
static inline
int lttng_pthread_setname_np(const char *name)
{
        return -ENOSYS;
}

static inline
int lttng_pthread_getname_np(char *name, size_t len)
{
        return -ENOSYS;
}
#endif

static inline
void lttng_ust_getprocname(char *name)
{
	lttng_pthread_getname_np(name, LTTNG_UST_PROCNAME_LEN);
}

static inline
int lttng_ust_setustprocname(void)
{
	int ret = 0, len;
	char name[LTTNG_UST_PROCNAME_LEN];
	int limit = LTTNG_UST_PROCNAME_LEN - strlen(LTTNG_UST_PROCNAME_SUFFIX) - 1;

	lttng_pthread_getname_np(name, LTTNG_UST_PROCNAME_LEN);

	len = strlen(name);
	if (len > limit) {
		len = limit;
	}

	ret = sprintf(name + len, LTTNG_UST_PROCNAME_SUFFIX);
	if (ret != strlen(LTTNG_UST_PROCNAME_SUFFIX)) {
		goto error;
	}

	ret = lttng_pthread_setname_np(name);

error:
	return ret;
}


#include <errno.h>

#ifndef ENODATA
#define ENODATA	ENOMSG
#endif

#endif /* _UST_COMPAT_H */
Commit	Line	Data
	1	#ifndef _UST_COMPAT_H
	2	#define _UST_COMPAT_H
	3
	4	/*
	5	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	6	* Copyright (C) 2016 Raphaël Beamonte <raphael.beamonte@gmail.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; only
	11	* version 2.1 of 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 <pthread.h>
	24
	25	/*
	26	* Limit imposed by Linux UST-sessiond ABI.
	27	*/
	28	#define LTTNG_UST_PROCNAME_LEN 17
	29
	30	#define LTTNG_UST_PROCNAME_SUFFIX "-ust"
	31
	32
	33	#if defined(HAVE_PTHREAD_SETNAME_NP_WITH_TID)
	34	static inline
	35	int lttng_pthread_setname_np(const char *name)
	36	{
	37	return pthread_setname_np(pthread_self(), name);
	38	}
	39
	40	static inline
	41	int lttng_pthread_getname_np(char *name, size_t len)
	42	{
	43	return pthread_getname_np(pthread_self(), name, len);
	44	}
	45	#elif defined(HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID)
	46	static inline
	47	int lttng_pthread_setname_np(const char *name)
	48	{
	49	return pthread_setname_np(name);
	50	}
	51
	52	static inline
	53	int lttng_pthread_getname_np(char *name, size_t len)
	54	{
	55	return pthread_getname_np(name, len);
	56	}
	57	#else
	58	/*
	59	* For platforms without thread name support, do nothing.
	60	*/
	61	static inline
	62	int lttng_pthread_setname_np(const char *name)
	63	{
	64	return -ENOSYS;
	65	}
	66
	67	static inline
	68	int lttng_pthread_getname_np(char *name, size_t len)
	69	{
	70	return -ENOSYS;
	71	}
	72	#endif
	73
	74	static inline
	75	void lttng_ust_getprocname(char *name)
	76	{
	77	lttng_pthread_getname_np(name, LTTNG_UST_PROCNAME_LEN);
	78	}
	79
	80	static inline
	81	int lttng_ust_setustprocname(void)
	82	{
	83	int ret = 0, len;
	84	char name[LTTNG_UST_PROCNAME_LEN];
	85	int limit = LTTNG_UST_PROCNAME_LEN - strlen(LTTNG_UST_PROCNAME_SUFFIX) - 1;
	86
	87	lttng_pthread_getname_np(name, LTTNG_UST_PROCNAME_LEN);
	88
	89	len = strlen(name);
	90	if (len > limit) {
	91	len = limit;
	92	}
	93
	94	ret = sprintf(name + len, LTTNG_UST_PROCNAME_SUFFIX);
	95	if (ret != strlen(LTTNG_UST_PROCNAME_SUFFIX)) {
	96	goto error;
	97	}
	98
	99	ret = lttng_pthread_setname_np(name);
	100
	101	error:
	102	return ret;
	103	}
	104
	105
	106	#include <errno.h>
	107
	108	#ifndef ENODATA
	109	#define ENODATA ENOMSG
	110	#endif
	111
	112	#endif /* _UST_COMPAT_H */