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1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * Copyright (C) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
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8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
d14d33bf | 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | * GNU General Public License for more details. |
13 | * | |
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14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
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17 | */ |
18 | ||
19 | #ifndef _LTTNG_USTCONSUMER_H | |
20 | #define _LTTNG_USTCONSUMER_H | |
21 | ||
22 | #include <config.h> | |
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23 | #include <errno.h> |
24 | ||
10a8a223 DG |
25 | #include <common/consumer.h> |
26 | ||
74d0b642 | 27 | #ifdef HAVE_LIBLTTNG_UST_CTL |
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28 | |
29 | /* | |
30 | * Mmap the ring buffer, read it and write the data to the tracefile. | |
31 | * | |
4078b776 | 32 | * Returns the number of bytes written, else negative value on error. |
3bd1e081 | 33 | */ |
4078b776 | 34 | extern ssize_t lttng_ustconsumer_on_read_subbuffer_mmap( |
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35 | struct lttng_consumer_local_data *ctx, |
36 | struct lttng_consumer_stream *stream, unsigned long len); | |
37 | ||
38 | /* Not implemented */ | |
4078b776 | 39 | extern ssize_t lttng_ustconsumer_on_read_subbuffer_splice( |
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40 | struct lttng_consumer_local_data *ctx, |
41 | struct lttng_consumer_stream *stream, unsigned long len); | |
42 | ||
43 | /* | |
44 | * Take a snapshot for a specific fd | |
45 | * | |
46 | * Returns 0 on success, < 0 on error | |
47 | */ | |
48 | int lttng_ustconsumer_take_snapshot(struct lttng_consumer_local_data *ctx, | |
49 | struct lttng_consumer_stream *stream); | |
50 | ||
51 | /* | |
52 | * Get the produced position | |
53 | * | |
54 | * Returns 0 on success, < 0 on error | |
55 | */ | |
56 | int lttng_ustconsumer_get_produced_snapshot( | |
57 | struct lttng_consumer_local_data *ctx, | |
58 | struct lttng_consumer_stream *stream, | |
59 | unsigned long *pos); | |
60 | ||
61 | int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, | |
62 | int sock, struct pollfd *consumer_sockpoll); | |
63 | ||
64 | extern int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan); | |
65 | extern void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan); | |
66 | extern int lttng_ustconsumer_allocate_stream(struct lttng_consumer_stream *stream); | |
67 | extern void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream); | |
68 | ||
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69 | int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream, |
70 | struct lttng_consumer_local_data *ctx); | |
71 | int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream); | |
72 | ||
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73 | void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream); |
74 | ||
74d0b642 | 75 | #else /* HAVE_LIBLTTNG_UST_CTL */ |
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76 | |
77 | static inline | |
4078b776 | 78 | ssize_t lttng_ustconsumer_on_read_subbuffer_mmap( |
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79 | struct lttng_consumer_local_data *ctx, |
80 | struct lttng_consumer_stream *stream, unsigned long len) | |
81 | { | |
82 | return -ENOSYS; | |
83 | } | |
84 | ||
85 | static inline | |
4078b776 | 86 | ssize_t lttng_ustconsumer_on_read_subbuffer_splice( |
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87 | struct lttng_consumer_local_data *ctx, |
88 | struct lttng_consumer_stream *uststream, unsigned long len) | |
89 | { | |
90 | return -ENOSYS; | |
91 | } | |
92 | ||
93 | static inline | |
94 | int lttng_ustconsumer_take_snapshot(struct lttng_consumer_local_data *ctx, | |
95 | struct lttng_consumer_stream *stream) | |
96 | { | |
97 | return -ENOSYS; | |
98 | } | |
99 | ||
100 | static inline | |
101 | int lttng_ustconsumer_get_produced_snapshot( | |
102 | struct lttng_consumer_local_data *ctx, | |
103 | struct lttng_consumer_stream *stream, | |
104 | unsigned long *pos) | |
105 | { | |
106 | return -ENOSYS; | |
107 | } | |
108 | ||
109 | static inline | |
110 | int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, | |
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111 | int sock, struct pollfd *consumer_sockpoll) |
112 | { | |
113 | return -ENOSYS; | |
114 | } | |
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115 | |
116 | static inline | |
117 | int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan) | |
118 | { | |
119 | return -ENOSYS; | |
120 | } | |
121 | ||
122 | static inline | |
123 | void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan) | |
124 | { | |
125 | } | |
126 | ||
127 | static inline | |
128 | int lttng_ustconsumer_allocate_stream(struct lttng_consumer_stream *stream) | |
129 | { | |
130 | return -ENOSYS; | |
131 | } | |
132 | ||
133 | static inline | |
134 | void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream) | |
135 | { | |
136 | } | |
137 | ||
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138 | static inline |
139 | int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream, | |
140 | struct lttng_consumer_local_data *ctx) | |
141 | { | |
142 | return -ENOSYS; | |
143 | } | |
144 | ||
145 | static inline | |
146 | int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
147 | { | |
148 | return -ENOSYS; | |
149 | } | |
150 | ||
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151 | static inline |
152 | void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream) | |
153 | { | |
154 | } | |
155 | ||
74d0b642 | 156 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
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157 | |
158 | #endif /* _LTTNG_USTCONSUMER_H */ |