X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=include%2Fbabeltrace%2Fctf%2Fevents.h;h=c08314f8775bbb6d0418b9f7011ccc0c30fb04f1;hb=badea1a2413e25f0b1961770148e28deba8a3a3f;hp=eb644125c69a9875b0875c9f60aa7fecd5ad5824;hpb=9843982dca5a80c001fc5989a9ce5a2283b0740f;p=babeltrace.git

diff --git a/include/babeltrace/ctf/events.h b/include/babeltrace/ctf/events.h
index eb644125..c08314f8 100644
--- a/include/babeltrace/ctf/events.h
+++ b/include/babeltrace/ctf/events.h
@@ -24,10 +24,12 @@
  */
 
 #include <stdint.h>
+#include <babeltrace/iterator.h>
 
 struct ctf_stream;
 struct ctf_stream_event;
 struct definition;
+struct bt_ctf_iter;
 
 /*
  * the top-level scopes in CTF
@@ -66,6 +68,42 @@ struct bt_ctf_event {
 	struct ctf_stream_event *event;
 };
 
+/*
+ * bt_ctf_iter_read_event: Read the iterator's current event data.
+ *
+ * @iter: trace collection iterator (input)
+ * @stream: stream containing event at current position (output)
+ * @event: current event (output)
+ * Return 0 on success, negative error value on error.
+ */
+struct bt_ctf_event *bt_ctf_iter_read_event(struct bt_ctf_iter *iter);
+
+/*
+ * bt_ctf_iter_create - Allocate a CTF trace collection iterator.
+ *
+ * begin_pos and end_pos are optional parameters to specify the position
+ * at which the trace collection should be seeked upon iterator
+ * creation, and the position at which iteration will start returning
+ * "EOF".
+ *
+ * By default, if begin_pos is NULL, a BT_SEEK_CUR is performed at
+ * creation. By default, if end_pos is NULL, a BT_SEEK_END (end of
+ * trace) is the EOF criterion.
+ */
+struct bt_ctf_iter *bt_ctf_iter_create(struct bt_context *ctx,
+		struct bt_iter_pos *begin_pos,
+		struct bt_iter_pos *end_pos);
+
+/*
+ * bt_ctf_get_iter - get iterator from ctf iterator.
+ */
+struct bt_iter *bt_ctf_get_iter(struct bt_ctf_iter *iter);
+
+/*
+ * bt_ctf_iter_destroy - Free a CTF trace collection iterator.
+ */
+void bt_ctf_iter_destroy(struct bt_ctf_iter *iter);
+
 /*
  * bt_ctf_get_top_level_scope: return a definition of the top-level scope
  *
@@ -90,9 +128,9 @@ const char *bt_ctf_event_name(struct bt_ctf_event *event);
 uint64_t bt_ctf_get_timestamp(struct bt_ctf_event *event);
 
 /*
- * bt_ctf_get_field_list: returns an array of *def pointing to each field of
- * the event. The array is NULL terminated.
- * On error : return NULL.
+ * bt_ctf_get_field_list: set list pointer to an array of definition
+ * pointers and set count to the number of elements in the array.
+ * Return 0 on success and a negative value on error.
  */
 int bt_ctf_get_field_list(struct bt_ctf_event *event,
 		struct definition *scope,
@@ -122,7 +160,7 @@ const char *bt_ctf_field_name(const struct definition *def);
 /*
  * bt_ctf_field_type: returns the type of a field or -1 if unknown
  */
-enum ctf_type_id bt_ctf_field_type(struct definition *def);
+enum ctf_type_id bt_ctf_field_type(const struct definition *def);
 
 /*
  * Field access functions
@@ -134,10 +172,10 @@ enum ctf_type_id bt_ctf_field_type(struct definition *def);
  * returned is undefined. To check if an error occured, use the
  * bt_ctf_field_error() function after accessing a field.
  */
-uint64_t bt_ctf_get_uint64(struct definition *field);
-int64_t bt_ctf_get_int64(struct definition *field);
-char *bt_ctf_get_char_array(struct definition *field);
-char *bt_ctf_get_string(struct definition *field);
+uint64_t bt_ctf_get_uint64(const struct definition *field);
+int64_t bt_ctf_get_int64(const struct definition *field);
+char *bt_ctf_get_char_array(const struct definition *field);
+char *bt_ctf_get_string(const struct definition *field);
 
 /*
  * bt_ctf_field_error: returns the last error code encountered while