Cleanup: simplify 'poll' wrapper build
[lttng-tools.git] / src / common / fd-tracker / utils-poll.c
CommitLineData
184597e3 1/*
ab5be9fa 2 * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com>
184597e3 3 *
ab5be9fa 4 * SPDX-License-Identifier: GPL-2.0-only
184597e3 5 *
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6 */
7
8#include <common/compat/poll.h>
9
10#include "utils.h"
11
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12#if HAVE_EPOLL
13
14struct create_args {
15 struct lttng_poll_event *events;
16 int size;
17 int flags;
18};
19
20static int open_epoll(void *data, int *out_fd)
21{
22 int ret;
23 struct create_args *args = data;
24
25 ret = lttng_poll_create(args->events, args->size, args->flags);
26 if (ret < 0) {
27 goto end;
28 }
29
30 *out_fd = args->events->epfd;
31end:
32 return ret;
33}
34
35static int close_epoll(void *data, int *in_fd)
36{
37 /* Will close the epfd. */
38 lttng_poll_clean((struct lttng_poll_event *) data);
39 return 0;
40}
41
42/*
43 * The epoll variant of the poll compat layer creates an unsuspendable fd which
44 * must be tracked.
45 */
46int fd_tracker_util_poll_create(struct fd_tracker *tracker,
47 const char *name,
48 struct lttng_poll_event *events,
49 int size,
50 int flags)
51{
52 int out_fd;
53 struct create_args create_args = {
54 .events = events,
55 .size = size,
56 .flags = flags,
57 };
58
59 return fd_tracker_open_unsuspendable_fd(
60 tracker, &out_fd, &name, 1, open_epoll, &create_args);
61}
62
63int fd_tracker_util_poll_clean(
64 struct fd_tracker *tracker, struct lttng_poll_event *events)
65{
66 return fd_tracker_close_unsuspendable_fd(
67 tracker, &events->epfd, 1, close_epoll, events);
68}
69
70#else /* HAVE_EPOLL */
71
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72/*
73 * The epoll variant of the poll compat layer creates an unsuspendable fd which
74 * must be tracked.
75 */
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76int fd_tracker_util_poll_create(struct fd_tracker *tracker,
77 const char *name,
78 struct lttng_poll_event *events,
79 int size,
80 int flags)
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81{
82 return lttng_poll_create(events, size, flags);
83}
84
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85int fd_tracker_util_poll_clean(
86 struct fd_tracker *tracker, struct lttng_poll_event *events)
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87{
88 lttng_poll_clean(events);
89 return 0;
90}
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91
92#endif /* !HAVE_EPOLL */
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