Fix: relayd vs consumerd compatibility

[lttng-tools.git] / src / common / index / index.h

diff --git a/src/common/index/index.h b/src/common/index/index.h
index a7e6aee07a046a2b7b097f76f0a920dcf2bc1ac8..7020936b646b33142f3d2021d5f540bac08f29dd 100644 (file)
--- a/src/common/index/index.h
+++ b/src/common/index/index.h
@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
  *                      David Goulet <dgoulet@efficios.com>
+ *               2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License, version 2 only, as
@@ -20,13 +21,34 @@
 #define _INDEX_H
 
 #include <inttypes.h>
+#include <urcu/ref.h>
 
 #include "ctf-index.h"
 
-int index_create_file(char *path_name, char *stream_name, int uid, int gid,
-               uint64_t size, uint64_t count);
-ssize_t index_write(int fd, struct ctf_packet_index *index, size_t len);
-int index_open(const char *path_name, const char *channel_name,
-               uint64_t tracefile_count, uint64_t tracefile_count_current);
+struct lttng_index_file {
+       int fd;
+       uint32_t major;
+       uint32_t minor;
+       uint32_t element_len;
+       struct urcu_ref ref;
+};
+
+/*
+ * create and open have refcount of 1. Use put to decrement the
+ * refcount. Destroys when reaching 0. Use "get" to increment refcount.
+ */
+struct lttng_index_file *lttng_index_file_create(char *path_name,
+               char *stream_name, int uid, int gid, uint64_t size,
+               uint64_t count, uint32_t major, uint32_t minor);
+struct lttng_index_file *lttng_index_file_open(const char *path_name,
+               const char *channel_name, uint64_t tracefile_count,
+               uint64_t tracefile_count_current);
+int lttng_index_file_write(const struct lttng_index_file *index_file,
+               const struct ctf_packet_index *element);
+int lttng_index_file_read(const struct lttng_index_file *index_file,
+               struct ctf_packet_index *element);
+
+void lttng_index_file_get(struct lttng_index_file *index_file);
+void lttng_index_file_put(struct lttng_index_file *index_file);
 
 #endif /* _INDEX_H */