*/
#include <unistd.h>
+#include <babeltrace/format.h>
/* struct bt_context is opaque to the user */
struct bt_context;
struct stream_pos;
+struct bt_ctf_event;
/*
* bt_context_create : create a Babeltrace context
*
* Open a trace.
*
- * packet_seek can be NULL to use the default packet_seek handler
- * provided by the trace format. If non-NULL, it is used as an override
- * of the handler for seeks across packets. It takes as parameter a
- * stream position, the packet index it needs to seek to (for SEEK_SET),
- * and a "whence" parameter (either SEEK_CUR: seek to next packet, or
- * SEEK_SET: seek to packet at packet index).
+ * path is the path to the trace, it is not recursive. If "path" is NULL,
+ * stream_list is used instead as a list of mmap streams to open for the trace.
+ *
+ * format is a string containing the format name in which the trace was
+ * produced.
+ *
+ * packet_seek can be NULL to use the default packet_seek handler provided by
+ * the trace format. If non-NULL, it is used as an override of the handler for
+ * seeks across packets. It takes as parameter a stream position, the packet
+ * index it needs to seek to (for SEEK_SET), and a "whence" parameter (either
+ * SEEK_CUR: seek to next packet, or SEEK_SET: seek to packet at packet index).
+ *
+ * stream_list is a linked list of streams, it is used to open a trace where
+ * the trace data is located in memory mapped areas instead of trace files,
+ * this argument should be set to NULL when path is not NULL.
+ *
+ * The metadata parameter acts as a metadata override when not NULL, otherwise
+ * the format handles the metadata opening.
*
* Return: the trace handle id (>= 0) on success, a negative
* value on error.
int bt_context_add_trace(struct bt_context *ctx, const char *path,
const char *format,
void (*packet_seek)(struct stream_pos *pos,
- size_t index, int whence));
+ size_t index, int whence),
+ struct mmap_stream_list *stream_list,
+ FILE *metadata);
/*
* bt_context_remove_trace: Remove a trace from the context.
void bt_context_get(struct bt_context *ctx);
void bt_context_put(struct bt_context *ctx);
+/*
+ * bt_ctf_get_context : get the context associated with an event
+ *
+ * Returns NULL on error
+ */
+struct bt_context *bt_ctf_event_get_context(const struct bt_ctf_event *event);
+
#endif /* _BABELTRACE_CONTEXT_H */