projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 3bd1e081 MD |
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 | |
| 6 | * modify it under the terms of the GNU General Public License | |
| 7 | * as published by the Free Software Foundation; only version 2 | |
| 8 | * of the License. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program; if not, write to the Free Software | |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 18 | */ | |
| 19 | ||
| 20 | #ifndef _LTTNG_KCONSUMER_H | |
| 21 | #define _LTTNG_KCONSUMER_H | |
| 22 | ||
| 10a8a223 | 23 | #include <common/consumer.h> |
| 3bd1e081 MD |
24 | |
| 25 | /* | |
| 26 | * Mmap the ring buffer, read it and write the data to the tracefile. | |
| 27 | * | |
| f5204c94 | 28 | * Returns the number of bytes written, or negative value on error. |
| 3bd1e081 | 29 | */ |
| f5204c94 | 30 | extern ssize_t lttng_kconsumer_on_read_subbuffer_mmap( |
| 3bd1e081 MD |
31 | struct lttng_consumer_local_data *ctx, |
| 32 | struct lttng_consumer_stream *stream, unsigned long len); | |
| 33 | ||
| 34 | /* | |
| 35 | * Splice the data from the ring buffer to the tracefile. | |
| 36 | * | |
| f5204c94 MD |
37 | * Returns the number of bytes spliced, or negative error value on |
| 38 | * error. | |
| 3bd1e081 | 39 | */ |
| f5204c94 | 40 | extern ssize_t lttng_kconsumer_on_read_subbuffer_splice( |
| 3bd1e081 MD |
41 | struct lttng_consumer_local_data *ctx, |
| 42 | struct lttng_consumer_stream *stream, unsigned long len); | |
| 43 | ||
| 44 | /* | |
| 45 | * Take a snapshot for a specific fd | |
| 46 | * | |
| 47 | * Returns 0 on success, < 0 on error | |
| 48 | */ | |
| 49 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_local_data *ctx, | |
| 50 | struct lttng_consumer_stream *stream); | |
| 51 | ||
| 52 | /* | |
| 53 | * Get the produced position | |
| 54 | * | |
| 55 | * Returns 0 on success, < 0 on error | |
| 56 | */ | |
| 57 | int lttng_kconsumer_get_produced_snapshot( | |
| 58 | struct lttng_consumer_local_data *ctx, | |
| 59 | struct lttng_consumer_stream *stream, | |
| 60 | unsigned long *pos); | |
| 61 | ||
| 62 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, | |
| 63 | int sock, struct pollfd *consumer_sockpoll); | |
| 64 | ||
| d41f73b7 | 65 | |
| f5204c94 | 66 | ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream, |
| d41f73b7 MD |
67 | struct lttng_consumer_local_data *ctx); |
| 68 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream); | |
| 69 | ||
| 3bd1e081 | 70 | #endif /* _LTTNG_KCONSUMER_H */ |