src/common/ust-consumer/ust-consumer.h

   1 /*
   2  * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
   3  * Copyright (C) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *
   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.
   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
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  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.
  17  */
  18
  19 #ifndef _LTTNG_USTCONSUMER_H
  20 #define _LTTNG_USTCONSUMER_H
  21
  22 #include <config.h>
  23 #include <errno.h>
  24
  25 #include <common/consumer.h>
  26
  27 #ifdef HAVE_LIBLTTNG_UST_CTL
  28
  29 int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream);
  30
  31 int lttng_ustconsumer_get_produced_snapshot(
  32                 struct lttng_consumer_stream *stream, unsigned long *pos);
  33 int lttng_ustconsumer_get_consumed_snapshot(
  34                 struct lttng_consumer_stream *stream, unsigned long *pos);
  35
  36 int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
  37                 int sock, struct pollfd *consumer_sockpoll);
  38
  39 extern int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan);
  40 extern void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan);
  41 extern int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream);
  42 extern void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream);
  43
  44 int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
  45                 struct lttng_consumer_local_data *ctx);
  46 int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream);
  47
  48 void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream);
  49
  50 int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream,
  51                 unsigned long *off);
  52 void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream);
  53 int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream,
  54                 uint64_t *stream_id);
  55 int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream);
  56 void lttng_ustconsumer_close_all_metadata(struct lttng_ht *ht);
  57 void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata);
  58 void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream);
  59 int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset,
  60                 uint64_t len, struct lttng_consumer_channel *channel,
  61                 int timer, int wait);
  62 int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx,
  63                 struct lttng_consumer_channel *channel, int timer, int wait);
  64 int lttng_ustconsumer_sync_metadata(struct lttng_consumer_local_data *ctx,
  65                 struct lttng_consumer_stream *metadata);
  66 void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream,
  67                 int producer);
  68 int lttng_ustconsumer_get_current_timestamp(
  69                 struct lttng_consumer_stream *stream, uint64_t *ts);
  70
  71 #else /* HAVE_LIBLTTNG_UST_CTL */
  72
  73 static inline
  74 ssize_t lttng_ustconsumer_on_read_subbuffer_mmap(
  75                 struct lttng_consumer_local_data *ctx,
  76                 struct lttng_consumer_stream *stream, unsigned long len,
  77                 unsigned long padding)
  78 {
  79         return -ENOSYS;
  80 }
  81
  82 static inline
  83 ssize_t lttng_ustconsumer_on_read_subbuffer_splice(
  84                 struct lttng_consumer_local_data *ctx,
  85                 struct lttng_consumer_stream *uststream, unsigned long len,
  86                 unsigned long padding)
  87 {
  88         return -ENOSYS;
  89 }
  90
  91 static inline
  92 int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream)
  93 {
  94         return -ENOSYS;
  95 }
  96
  97 static inline
  98 int lttng_ustconsumer_get_produced_snapshot(
  99                 struct lttng_consumer_stream *stream, unsigned long *pos)
 100 {
 101         return -ENOSYS;
 102 }
 103
 104 static inline
 105 int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
 106                 int sock, struct pollfd *consumer_sockpoll)
 107 {
 108         return -ENOSYS;
 109 }
 110
 111 static inline
 112 int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan)
 113 {
 114         return -ENOSYS;
 115 }
 116
 117 static inline
 118 void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan)
 119 {
 120 }
 121
 122 static inline
 123 int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream)
 124 {
 125         return -ENOSYS;
 126 }
 127
 128 static inline
 129 void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream)
 130 {
 131 }
 132
 133 static inline
 134 int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
 135                 struct lttng_consumer_local_data *ctx)
 136 {
 137         return -ENOSYS;
 138 }
 139
 140 static inline
 141 int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream)
 142 {
 143         return -ENOSYS;
 144 }
 145
 146 static inline
 147 void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream)
 148 {
 149 }
 150
 151 static inline
 152 int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream,
 153                 unsigned long *off)
 154 {
 155         return -ENOSYS;
 156 }
 157 static inline
 158 int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream)
 159 {
 160         return -ENOSYS;
 161 }
 162 static inline
 163 void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream)
 164 {
 165         return NULL;
 166 }
 167 static inline
 168 void lttng_ustconsumer_close_all_metadata(struct lttng_ht *ht)
 169 {
 170 }
 171 static inline
 172 void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata)
 173 {
 174 }
 175 static inline
 176 void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream)
 177 {
 178 }
 179 static inline
 180 int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset,
 181                 uint64_t len, struct lttng_consumer_channel *channel,
 182                 int timer)
 183 {
 184         return -ENOSYS;
 185 }
 186 static inline
 187 int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx,
 188                 struct lttng_consumer_channel *channel, int timer, int wait)
 189 {
 190         return -ENOSYS;
 191 }
 192 static inline
 193 int lttng_ustconsumer_sync_metadata(struct lttng_consumer_local_data *ctx,
 194                 struct lttng_consumer_stream *metadata)
 195 {
 196         return -ENOSYS;
 197 }
 198 static inline
 199 void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream,
 200                 int producer)
 201 {
 202 }
 203 static inline
 204 int lttng_ustconsumer_get_current_timestamp(
 205                 struct lttng_consumer_stream *stream, uint64_t *ts)
 206 {
 207         return -ENOSYS;
 208 }
 209 static inline
 210 int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream,
 211                 uint64_t *stream_id)
 212 {
 213         return -ENOSYS;
 214 }
 215 #endif /* HAVE_LIBLTTNG_UST_CTL */
 216
 217 #endif /* _LTTNG_USTCONSUMER_H */