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
  34 int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
  35                 int sock, struct pollfd *consumer_sockpoll);
  36
  37 extern int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan);
  38 extern void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan);
  39 extern int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream);
  40 extern void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream);
  41
  42 int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
  43                 struct lttng_consumer_local_data *ctx);
  44 int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream);
  45
  46 void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream);
  47
  48 int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream,
  49                 unsigned long *off);
  50 void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream);
  51 int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream);
  52
  53 #else /* HAVE_LIBLTTNG_UST_CTL */
  54
  55 static inline
  56 ssize_t lttng_ustconsumer_on_read_subbuffer_mmap(
  57                 struct lttng_consumer_local_data *ctx,
  58                 struct lttng_consumer_stream *stream, unsigned long len,
  59                 unsigned long padding)
  60 {
  61         return -ENOSYS;
  62 }
  63
  64 static inline
  65 ssize_t lttng_ustconsumer_on_read_subbuffer_splice(
  66                 struct lttng_consumer_local_data *ctx,
  67                 struct lttng_consumer_stream *uststream, unsigned long len,
  68                 unsigned long padding)
  69 {
  70         return -ENOSYS;
  71 }
  72
  73 static inline
  74 int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream)
  75 {
  76         return -ENOSYS;
  77 }
  78
  79 static inline
  80 int lttng_ustconsumer_get_produced_snapshot(
  81                 struct lttng_consumer_stream *stream, unsigned long *pos)
  82 {
  83         return -ENOSYS;
  84 }
  85
  86 static inline
  87 int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
  88                 int sock, struct pollfd *consumer_sockpoll)
  89 {
  90         return -ENOSYS;
  91 }
  92
  93 static inline
  94 int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan)
  95 {
  96         return -ENOSYS;
  97 }
  98
  99 static inline
 100 void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan)
 101 {
 102 }
 103
 104 static inline
 105 int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream)
 106 {
 107         return -ENOSYS;
 108 }
 109
 110 static inline
 111 void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream)
 112 {
 113 }
 114
 115 static inline
 116 int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
 117                 struct lttng_consumer_local_data *ctx)
 118 {
 119         return -ENOSYS;
 120 }
 121
 122 static inline
 123 int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream)
 124 {
 125         return -ENOSYS;
 126 }
 127
 128 static inline
 129 void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream)
 130 {
 131 }
 132
 133 static inline
 134 int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream,
 135                 unsigned long *off)
 136 {
 137         return -ENOSYS;
 138 }
 139 static inline
 140 int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream)
 141 {
 142         return -ENOSYS;
 143 }
 144 static inline
 145 void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream)
 146 {
 147         return NULL;
 148 }
 149 #endif /* HAVE_LIBLTTNG_UST_CTL */
 150
 151 #endif /* _LTTNG_USTCONSUMER_H */