[lttng-tools.git] / src / common / compat / poll.h

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program 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 General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _LTT_POLL_H
#define _LTT_POLL_H

#include <assert.h>
#include <string.h>
#include <unistd.h>

#include <common/common.h>

/*
 * Maximum number of fd we can monitor.
 *
 * For epoll(7), /proc/sys/fs/epoll/max_user_watches (since Linux 2.6.28) will
 * be used for the maximum size of the poll set. If this interface is not
 * available, according to the manpage, the max_user_watches value is 1/25 (4%)
 * of the available low memory divided by the registration cost in bytes which
 * is 90 bytes on a 32-bit kernel and 160 bytes on a 64-bit kernel.
 *
 * For poll(2), the max fds must not exceed RLIMIT_NOFILE given by
 * getrlimit(2).
 */
extern unsigned int poll_max_size;

/*
 * Used by lttng_poll_clean to free the events structure in a lttng_poll_event.
 */
static inline void __lttng_poll_free(void *events)
{
	if (events) {
		free(events);
	}
}

/*
 * epoll(7) implementation.
 */
#ifdef HAVE_EPOLL
#include <sys/epoll.h>
#include <stdio.h>

/* See man epoll(7) for this define path */
#define COMPAT_EPOLL_PROC_PATH "/proc/sys/fs/epoll/max_user_watches"

enum {
	/* Polling variables compatibility for epoll */
	LPOLLIN = EPOLLIN,
	LPOLLPRI = EPOLLPRI,
	LPOLLOUT = EPOLLOUT,
	LPOLLRDNORM = EPOLLRDNORM,
	LPOLLRDBAND = EPOLLRDBAND,
	LPOLLWRNORM = EPOLLWRNORM,
	LPOLLWRBAND = EPOLLWRBAND,
	LPOLLMSG = EPOLLMSG,
	LPOLLERR = EPOLLERR,
	LPOLLHUP = EPOLLHUP,
	LPOLLNVAL = EPOLLHUP,
	LPOLLRDHUP = EPOLLRDHUP,
	/* Close on exec feature of epoll */
	LTTNG_CLOEXEC = EPOLL_CLOEXEC,
};

struct compat_epoll_event {
	int epfd;
	uint32_t nb_fd;       /* Current number of fd in events */
	uint32_t alloc_size; /* Size of events array */
	uint32_t init_size;	/* Initial size of events array */
	struct epoll_event *events;
};
#define lttng_poll_event compat_epoll_event

static inline int __lttng_epoll_get_prev_fd(struct lttng_poll_event *events,
		int index, uint32_t nb_fd)
{
	assert(events);
	assert(index != nb_fd);

	if (index == 0 || nb_fd == 0) {
		return -1;
	} else {
		return events->events[index - 1].data.fd;
	}
}

/*
 * For the following calls, consider 'e' to be a lttng_poll_event pointer and i
 * being the index of the events array.
 */
#define LTTNG_POLL_GETFD(e, i) LTTNG_REF(e)->events[i].data.fd
#define LTTNG_POLL_GETEV(e, i) LTTNG_REF(e)->events[i].events
#define LTTNG_POLL_GETNB(e) LTTNG_REF(e)->nb_fd
#define LTTNG_POLL_GETSZ(e) LTTNG_REF(e)->events_size
#define LTTNG_POLL_GET_PREV_FD(e, i, nb_fd) \
	__lttng_epoll_get_prev_fd(LTTNG_REF(e), i, nb_fd)

/*
 * Create the epoll set. No memory allocation is done here.
 */
extern int compat_epoll_create(struct lttng_poll_event *events,
		int size, int flags);
#define lttng_poll_create(events, size, flags) \
	compat_epoll_create(events, size, flags)

/*
 * Wait on epoll set with the number of fd registered to the lttng_poll_event
 * data structure (events).
 */
extern int compat_epoll_wait(struct lttng_poll_event *events, int timeout);
#define lttng_poll_wait(events, timeout) \
	compat_epoll_wait(events, timeout)

/*
 * Add a fd to the epoll set and resize the epoll_event structure if needed.
 */
extern int compat_epoll_add(struct lttng_poll_event *events,
		int fd, uint32_t req_events);
#define lttng_poll_add(events, fd, req_events) \
	compat_epoll_add(events, fd, req_events)

/*
 * Remove a fd from the epoll set.
 */
extern int compat_epoll_del(struct lttng_poll_event *events, int fd);
#define lttng_poll_del(events, fd) \
	compat_epoll_del(events, fd)

/*
 * Set up the poll set limits variable poll_max_size
 */
extern void compat_epoll_set_max_size(void);
#define lttng_poll_set_max_size() \
	compat_epoll_set_max_size()

/*
 * This function memset with zero the structure since it can be reused at each
 * round of a main loop. Being in a loop and using a non static number of fds,
 * this function must be called to insure coherent events with associted fds.
 */
static inline void lttng_poll_reset(struct lttng_poll_event *events)
{
	if (events && events->events) {
		memset(events->events, 0,
				events->nb_fd * sizeof(struct epoll_event));
	}
}

/*
 * Clean the events structure of a lttng_poll_event. It's the caller
 * responsability to free the lttng_poll_event memory.
 */
static inline void lttng_poll_clean(struct lttng_poll_event *events)
{
	int ret;

	if (events) {
		ret = close(events->epfd);
		if (ret) {
			perror("close");
		}
		__lttng_poll_free((void *) events->events);
	}
}

#else	/* HAVE_EPOLL */
/*
 * Fallback on poll(2) API
 */

/* Needed for some poll event values */
#ifndef __USE_XOPEN
#define __USE_XOPEN
#endif

/* Needed for some poll event values */
#ifndef __USE_GNU
#define __USE_GNU
#endif

#include <poll.h>
#include <stdint.h>

enum {
	/* Polling variables compatibility for poll */
	LPOLLIN = POLLIN,
	LPOLLPRI = POLLPRI,
	LPOLLOUT = POLLOUT,
	LPOLLRDNORM = POLLRDNORM,
	LPOLLRDBAND = POLLRDBAND,
	LPOLLWRNORM = POLLWRNORM,
	LPOLLWRBAND = POLLWRBAND,
#if __linux__
	LPOLLMSG = POLLMSG,
	LPOLLRDHUP = POLLRDHUP,
#elif (defined(__FreeBSD__) || defined(__CYGWIN__))
	LPOLLMSG = 0,
	LPOLLRDHUP = 0,
#else
#error "Please add support for your OS."
#endif /* __linux__ */
	LPOLLERR = POLLERR,
	LPOLLHUP = POLLHUP | POLLNVAL,
	/* Close on exec feature does not exist for poll(2) */
	LTTNG_CLOEXEC = 0xdead,
};

struct compat_poll_event_array {
	uint32_t nb_fd;       /* Current number of fd in events */
	uint32_t alloc_size; /* Size of events array */
	/* Initial size of the pollset. We never shrink below that. */
	uint32_t init_size;
	struct pollfd *events;
};

struct compat_poll_event {
	/*
	 * Modified by the wait action. Updated using current fields if the
	 * need_update flag is set.
	 */
	struct compat_poll_event_array wait;
	/*
	 * This is modified by add/del actions being the _current_ flow of
	 * execution before a poll wait is done.
	 */
	struct compat_poll_event_array current;
	/* Indicate if wait.events needs to be realloc. */
	int need_realloc:1;
	/* Indicate if wait.events need to be updated from current. */
	int need_update:1;
};
#define lttng_poll_event compat_poll_event

static inline int __lttng_poll_get_prev_fd(struct lttng_poll_event *events,
		int index, uint32_t nb_fd)
{
	assert(events);
	assert(index != nb_fd);

	if (index == 0 || nb_fd == 0) {
		return -1;
	} else {
		return events->current.events[index - 1].fd;
	}
}

/*
 * For the following calls, consider 'e' to be a lttng_poll_event pointer and i
 * being the index of the events array.
 */
#define LTTNG_POLL_GETFD(e, i) LTTNG_REF(e)->wait.events[i].fd
#define LTTNG_POLL_GETEV(e, i) LTTNG_REF(e)->wait.events[i].revents
#define LTTNG_POLL_GETNB(e) LTTNG_REF(e)->wait.nb_fd
#define LTTNG_POLL_GETSZ(e) LTTNG_REF(e)->wait.events_size
#define LTTNG_POLL_GET_PREV_FD(e, i, nb_fd) \
	__lttng_poll_get_prev_fd(LTTNG_REF(e), i, nb_fd)

/*
 * Create a pollfd structure of size 'size'.
 */
extern int compat_poll_create(struct lttng_poll_event *events, int size);
#define lttng_poll_create(events, size, flags) \
	compat_poll_create(events, size)

/*
 * Wait on poll(2) event with nb_fd registered to the lttng_poll_event data
 * structure.
 */
extern int compat_poll_wait(struct lttng_poll_event *events, int timeout);
#define lttng_poll_wait(events, timeout) \
	compat_poll_wait(events, timeout)

/*
 * Add the fd to the pollfd structure. Resize if needed.
 */
extern int compat_poll_add(struct lttng_poll_event *events,
		int fd, uint32_t req_events);
#define lttng_poll_add(events, fd, req_events) \
	compat_poll_add(events, fd, req_events)

/*
 * Remove the fd from the pollfd. Memory allocation is done to recreate a new
 * pollfd, data is copied from the old pollfd to the new and, finally, the old
 * one is freed().
 */
extern int compat_poll_del(struct lttng_poll_event *events, int fd);
#define lttng_poll_del(events, fd) \
	compat_poll_del(events, fd)

/*
 * Set up the poll set limits variable poll_max_size
 */
extern void compat_poll_set_max_size(void);
#define lttng_poll_set_max_size() \
	compat_poll_set_max_size()

/*
 * No need to reset a pollfd structure for poll(2)
 */
static inline void lttng_poll_reset(struct lttng_poll_event *events)
{}

/*
 * Clean the events structure of a lttng_poll_event. It's the caller
 * responsability to free the lttng_poll_event memory.
 */
static inline void lttng_poll_clean(struct lttng_poll_event *events)
{
	if (events) {
		__lttng_poll_free((void *) events->wait.events);
		__lttng_poll_free((void *) events->current.events);
	}
}

#endif /* HAVE_EPOLL */

#endif /* _LTT_POLL_H */
Commit	Line	Data
5eb91c98 DG	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	*
d14d33bf AM	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License, version 2 only,
	6	* as published by the Free Software Foundation.
5eb91c98 DG	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
d14d33bf AM	13	* You should have received a copy of the GNU General Public License along
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
5eb91c98 DG	16	*/
	17
	18	#ifndef _LTT_POLL_H
	19	#define _LTT_POLL_H
	20
beaad64c	21	#include <assert.h>
5eb91c98 DG	22	#include <string.h>
	23	#include <unistd.h>
	24
990570ed	25	#include <common/common.h>
5eb91c98 DG	26
	27	/*
	28	* Maximum number of fd we can monitor.
	29	*
	30	* For epoll(7), /proc/sys/fs/epoll/max_user_watches (since Linux 2.6.28) will
	31	* be used for the maximum size of the poll set. If this interface is not
	32	* available, according to the manpage, the max_user_watches value is 1/25 (4%)
	33	* of the available low memory divided by the registration cost in bytes which
	34	* is 90 bytes on a 32-bit kernel and 160 bytes on a 64-bit kernel.
	35	*
	36	* For poll(2), the max fds must not exceed RLIMIT_NOFILE given by
	37	* getrlimit(2).
	38	*/
	39	extern unsigned int poll_max_size;
	40
	41	/*
	42	* Used by lttng_poll_clean to free the events structure in a lttng_poll_event.
	43	*/
	44	static inline void __lttng_poll_free(void *events)
	45	{
b3066218 DG	46	if (events) {
	47	free(events);
	48	}
5eb91c98 DG	49	}
	50
	51	/*
	52	* epoll(7) implementation.
	53	*/
	54	#ifdef HAVE_EPOLL
	55	#include <sys/epoll.h>
76d7553f	56	#include <stdio.h>
5eb91c98 DG	57
5eb91c98 DG	58	/* See man epoll(7) for this define path */
990570ed	59	#define COMPAT_EPOLL_PROC_PATH "/proc/sys/fs/epoll/max_user_watches"
5eb91c98 DG	60
	61	enum {
	62	/* Polling variables compatibility for epoll */
	63	LPOLLIN = EPOLLIN,
	64	LPOLLPRI = EPOLLPRI,
	65	LPOLLOUT = EPOLLOUT,
	66	LPOLLRDNORM = EPOLLRDNORM,
	67	LPOLLRDBAND = EPOLLRDBAND,
	68	LPOLLWRNORM = EPOLLWRNORM,
	69	LPOLLWRBAND = EPOLLWRBAND,
	70	LPOLLMSG = EPOLLMSG,
	71	LPOLLERR = EPOLLERR,
	72	LPOLLHUP = EPOLLHUP,
	73	LPOLLNVAL = EPOLLHUP,
	74	LPOLLRDHUP = EPOLLRDHUP,
	75	/* Close on exec feature of epoll */
	76	LTTNG_CLOEXEC = EPOLL_CLOEXEC,
	77	};
	78
	79	struct compat_epoll_event {
	80	int epfd;
	81	uint32_t nb_fd; /* Current number of fd in events */
d21b0d71 DG	82	uint32_t alloc_size; /* Size of events array */
d21b0d71 DG	83	uint32_t init_size; /* Initial size of events array */
5eb91c98 DG	84	struct epoll_event *events;
	85	};
	86	#define lttng_poll_event compat_epoll_event
	87
beaad64c DG	88	static inline int __lttng_epoll_get_prev_fd(struct lttng_poll_event *events,
	89	int index, uint32_t nb_fd)
	90	{
	91	assert(events);
	92	assert(index != nb_fd);
	93
	94	if (index == 0 \|\| nb_fd == 0) {
	95	return -1;
	96	} else {
	97	return events->events[index - 1].data.fd;
	98	}
	99	}
	100
5eb91c98 DG	101	/*
	102	* For the following calls, consider 'e' to be a lttng_poll_event pointer and i
	103	* being the index of the events array.
	104	*/
	105	#define LTTNG_POLL_GETFD(e, i) LTTNG_REF(e)->events[i].data.fd
	106	#define LTTNG_POLL_GETEV(e, i) LTTNG_REF(e)->events[i].events
	107	#define LTTNG_POLL_GETNB(e) LTTNG_REF(e)->nb_fd
	108	#define LTTNG_POLL_GETSZ(e) LTTNG_REF(e)->events_size
beaad64c DG	109	#define LTTNG_POLL_GET_PREV_FD(e, i, nb_fd) \
beaad64c DG	110	__lttng_epoll_get_prev_fd(LTTNG_REF(e), i, nb_fd)
5eb91c98 DG	111
	112	/*
	113	* Create the epoll set. No memory allocation is done here.
	114	*/
	115	extern int compat_epoll_create(struct lttng_poll_event *events,
	116	int size, int flags);
	117	#define lttng_poll_create(events, size, flags) \
65b1b198	118	compat_epoll_create(events, size, flags)
5eb91c98 DG	119
	120	/*
	121	* Wait on epoll set with the number of fd registered to the lttng_poll_event
	122	* data structure (events).
	123	*/
	124	extern int compat_epoll_wait(struct lttng_poll_event *events, int timeout);
	125	#define lttng_poll_wait(events, timeout) \
65b1b198	126	compat_epoll_wait(events, timeout)
5eb91c98 DG	127
	128	/*
	129	* Add a fd to the epoll set and resize the epoll_event structure if needed.
	130	*/
	131	extern int compat_epoll_add(struct lttng_poll_event *events,
	132	int fd, uint32_t req_events);
	133	#define lttng_poll_add(events, fd, req_events) \
65b1b198	134	compat_epoll_add(events, fd, req_events)
5eb91c98 DG	135
	136	/*
	137	* Remove a fd from the epoll set.
	138	*/
	139	extern int compat_epoll_del(struct lttng_poll_event *events, int fd);
	140	#define lttng_poll_del(events, fd) \
65b1b198	141	compat_epoll_del(events, fd)
5eb91c98 DG	142
	143	/*
	144	* Set up the poll set limits variable poll_max_size
	145	*/
	146	extern void compat_epoll_set_max_size(void);
65b1b198 MD	147	#define lttng_poll_set_max_size() \
65b1b198 MD	148	compat_epoll_set_max_size()
5eb91c98 DG	149
	150	/*
	151	* This function memset with zero the structure since it can be reused at each
	152	* round of a main loop. Being in a loop and using a non static number of fds,
	153	* this function must be called to insure coherent events with associted fds.
	154	*/
	155	static inline void lttng_poll_reset(struct lttng_poll_event *events)
	156	{
	157	if (events && events->events) {
	158	memset(events->events, 0,
	159	events->nb_fd * sizeof(struct epoll_event));
	160	}
	161	}
	162
	163	/*
	164	* Clean the events structure of a lttng_poll_event. It's the caller
	165	* responsability to free the lttng_poll_event memory.
	166	*/
	167	static inline void lttng_poll_clean(struct lttng_poll_event *events)
	168	{
76d7553f MD	169	int ret;
76d7553f MD	170
5eb91c98	171	if (events) {
76d7553f MD	172	ret = close(events->epfd);
	173	if (ret) {
	174	perror("close");
	175	}
5eb91c98 DG	176	__lttng_poll_free((void *) events->events);
	177	}
	178	}
	179
	180	#else /* HAVE_EPOLL */
	181	/*
	182	* Fallback on poll(2) API
	183	*/
	184
	185	/* Needed for some poll event values */
	186	#ifndef __USE_XOPEN
	187	#define __USE_XOPEN
	188	#endif
	189
	190	/* Needed for some poll event values */
	191	#ifndef __USE_GNU
	192	#define __USE_GNU
	193	#endif
	194
	195	#include <poll.h>
	196	#include <stdint.h>
	197
	198	enum {
	199	/* Polling variables compatibility for poll */
	200	LPOLLIN = POLLIN,
	201	LPOLLPRI = POLLPRI,
	202	LPOLLOUT = POLLOUT,
	203	LPOLLRDNORM = POLLRDNORM,
	204	LPOLLRDBAND = POLLRDBAND,
	205	LPOLLWRNORM = POLLWRNORM,
	206	LPOLLWRBAND = POLLWRBAND,
1268b9d6	207	#if __linux__
5eb91c98	208	LPOLLMSG = POLLMSG,
1268b9d6	209	LPOLLRDHUP = POLLRDHUP,
3247be18	210	#elif (defined(__FreeBSD__) \|\| defined(__CYGWIN__))
1268b9d6 DG	211	LPOLLMSG = 0,
1268b9d6 DG	212	LPOLLRDHUP = 0,
b2c3836f MD	213	#else
b2c3836f MD	214	#error "Please add support for your OS."
1268b9d6	215	#endif /* __linux__ */
5eb91c98 DG	216	LPOLLERR = POLLERR,
5eb91c98 DG	217	LPOLLHUP = POLLHUP \| POLLNVAL,
5eb91c98 DG	218	/* Close on exec feature does not exist for poll(2) */
	219	LTTNG_CLOEXEC = 0xdead,
	220	};
	221
d21b0d71	222	struct compat_poll_event_array {
5eb91c98	223	uint32_t nb_fd; /* Current number of fd in events */
d21b0d71 DG	224	uint32_t alloc_size; /* Size of events array */
	225	/* Initial size of the pollset. We never shrink below that. */
	226	uint32_t init_size;
5eb91c98 DG	227	struct pollfd *events;
5eb91c98 DG	228	};
d21b0d71 DG	229
	230	struct compat_poll_event {
	231	/*
	232	* Modified by the wait action. Updated using current fields if the
	233	* need_update flag is set.
	234	*/
	235	struct compat_poll_event_array wait;
	236	/*
	237	* This is modified by add/del actions being the _current_ flow of
	238	* execution before a poll wait is done.
	239	*/
	240	struct compat_poll_event_array current;
	241	/* Indicate if wait.events needs to be realloc. */
	242	int need_realloc:1;
	243	/* Indicate if wait.events need to be updated from current. */
	244	int need_update:1;
	245	};
5eb91c98 DG	246	#define lttng_poll_event compat_poll_event
5eb91c98 DG	247
beaad64c DG	248	static inline int __lttng_poll_get_prev_fd(struct lttng_poll_event *events,
	249	int index, uint32_t nb_fd)
	250	{
	251	assert(events);
	252	assert(index != nb_fd);
	253
	254	if (index == 0 \|\| nb_fd == 0) {
	255	return -1;
	256	} else {
	257	return events->current.events[index - 1].fd;
	258	}
	259	}
	260
5eb91c98 DG	261	/*
	262	* For the following calls, consider 'e' to be a lttng_poll_event pointer and i
	263	* being the index of the events array.
	264	*/
d21b0d71 DG	265	#define LTTNG_POLL_GETFD(e, i) LTTNG_REF(e)->wait.events[i].fd
	266	#define LTTNG_POLL_GETEV(e, i) LTTNG_REF(e)->wait.events[i].revents
	267	#define LTTNG_POLL_GETNB(e) LTTNG_REF(e)->wait.nb_fd
	268	#define LTTNG_POLL_GETSZ(e) LTTNG_REF(e)->wait.events_size
beaad64c DG	269	#define LTTNG_POLL_GET_PREV_FD(e, i, nb_fd) \
beaad64c DG	270	__lttng_poll_get_prev_fd(LTTNG_REF(e), i, nb_fd)
5eb91c98 DG	271
	272	/*
	273	* Create a pollfd structure of size 'size'.
	274	*/
	275	extern int compat_poll_create(struct lttng_poll_event *events, int size);
	276	#define lttng_poll_create(events, size, flags) \
65b1b198	277	compat_poll_create(events, size)
5eb91c98 DG	278
	279	/*
	280	* Wait on poll(2) event with nb_fd registered to the lttng_poll_event data
	281	* structure.
	282	*/
	283	extern int compat_poll_wait(struct lttng_poll_event *events, int timeout);
	284	#define lttng_poll_wait(events, timeout) \
65b1b198	285	compat_poll_wait(events, timeout)
5eb91c98 DG	286
	287	/*
	288	* Add the fd to the pollfd structure. Resize if needed.
	289	*/
	290	extern int compat_poll_add(struct lttng_poll_event *events,
	291	int fd, uint32_t req_events);
	292	#define lttng_poll_add(events, fd, req_events) \
65b1b198	293	compat_poll_add(events, fd, req_events)
5eb91c98 DG	294
	295	/*
	296	* Remove the fd from the pollfd. Memory allocation is done to recreate a new
	297	* pollfd, data is copied from the old pollfd to the new and, finally, the old
	298	* one is freed().
	299	*/
	300	extern int compat_poll_del(struct lttng_poll_event *events, int fd);
	301	#define lttng_poll_del(events, fd) \
65b1b198	302	compat_poll_del(events, fd)
5eb91c98 DG	303
	304	/*
	305	* Set up the poll set limits variable poll_max_size
	306	*/
	307	extern void compat_poll_set_max_size(void);
65b1b198 MD	308	#define lttng_poll_set_max_size() \
65b1b198 MD	309	compat_poll_set_max_size()
5eb91c98 DG	310
	311	/*
	312	* No need to reset a pollfd structure for poll(2)
	313	*/
	314	static inline void lttng_poll_reset(struct lttng_poll_event *events)
	315	{}
	316
	317	/*
	318	* Clean the events structure of a lttng_poll_event. It's the caller
	319	* responsability to free the lttng_poll_event memory.
	320	*/
	321	static inline void lttng_poll_clean(struct lttng_poll_event *events)
	322	{
	323	if (events) {
d21b0d71 DG	324	__lttng_poll_free((void *) events->wait.events);
d21b0d71 DG	325	__lttng_poll_free((void *) events->current.events);
5eb91c98 DG	326	}
	327	}
	328
	329	#endif /* HAVE_EPOLL */
	330
	331	#endif /* _LTT_POLL_H */