Add event header accessors and support for custom event headers

[babeltrace.git] / formats / ctf / ir / stream-class.c

diff --git a/formats/ctf/ir/stream-class.c b/formats/ctf/ir/stream-class.c
index a1115c221b6620877e676e3f9adcd5a9872b7d16..07f15651361280752a38998033b55ace8e5d03c7 100644 (file)
--- a/formats/ctf/ir/stream-class.c
+++ b/formats/ctf/ir/stream-class.c
@@ -1,7 +1,7 @@
 /*
  * stream-class.c
  *
- * Babeltrace CTF Writer
+ * Babeltrace CTF IR - Stream Class
  *
  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
@@ -49,6 +49,7 @@ int init_packet_context(struct bt_ctf_stream_class *stream_class,
 
 struct bt_ctf_stream_class *bt_ctf_stream_class_create(const char *name)
 {
+       int ret;
        struct bt_ctf_stream_class *stream_class = NULL;
 
        if (!name || !strlen(name)) {
@@ -67,6 +68,11 @@ struct bt_ctf_stream_class *bt_ctf_stream_class_create(const char *name)
                goto error_destroy;
        }
 
+       ret = init_packet_context(stream_class, BT_CTF_BYTE_ORDER_NATIVE);
+       if (ret) {
+               goto error_destroy;
+       }
+
        bt_ctf_ref_init(&stream_class->ref_count);
        return stream_class;
 
@@ -145,7 +151,7 @@ int bt_ctf_stream_class_set_id(struct bt_ctf_stream_class *stream_class,
 {
        int ret = 0;
 
-       if (!stream_class) {
+       if (!stream_class || stream_class->frozen) {
                ret = -1;
                goto end;
        }
@@ -197,27 +203,28 @@ end:
        return ret;
 }
 
-int64_t bt_ctf_stream_class_get_event_class_count(
+int bt_ctf_stream_class_get_event_class_count(
                struct bt_ctf_stream_class *stream_class)
 {
-       int64_t ret;
+       int ret;
 
        if (!stream_class) {
                ret = -1;
                goto end;
        }
 
-       ret = (int64_t) stream_class->event_classes->len;
+       ret = (int) stream_class->event_classes->len;
 end:
        return ret;
 }
 
 struct bt_ctf_event_class *bt_ctf_stream_class_get_event_class(
-               struct bt_ctf_stream_class *stream_class, size_t index)
+               struct bt_ctf_stream_class *stream_class, int index)
 {
        struct bt_ctf_event_class *event_class = NULL;
 
-       if (!stream_class || index >= stream_class->event_classes->len) {
+       if (!stream_class || index < 0 ||
+               index >= stream_class->event_classes->len) {
                goto end;
        }
 
@@ -257,6 +264,130 @@ end:
        return event_class;
 }
 
+struct bt_ctf_field_type *bt_ctf_stream_class_get_packet_context_type(
+               struct bt_ctf_stream_class *stream_class)
+{
+       struct bt_ctf_field_type *ret = NULL;
+
+       if (!stream_class) {
+               goto end;
+       }
+
+       assert(stream_class->packet_context_type);
+       bt_ctf_field_type_get(stream_class->packet_context_type);
+       ret = stream_class->packet_context_type;
+end:
+       return ret;
+}
+
+int bt_ctf_stream_class_set_packet_context_type(
+               struct bt_ctf_stream_class *stream_class,
+               struct bt_ctf_field_type *packet_context_type)
+{
+       int ret = 0;
+
+       if (!stream_class || !packet_context_type || stream_class->frozen) {
+               ret = -1;
+               goto end;
+       }
+
+       assert(stream_class->packet_context_type);
+       if (bt_ctf_field_type_get_type_id(packet_context_type) !=
+               CTF_TYPE_STRUCT) {
+               /* A packet context must be a structure */
+               ret = -1;
+               goto end;
+       }
+
+       bt_ctf_field_type_put(stream_class->packet_context_type);
+       bt_ctf_field_type_get(packet_context_type);
+       stream_class->packet_context_type = packet_context_type;
+end:
+       return ret;
+}
+
+struct bt_ctf_field_type *bt_ctf_stream_class_get_event_header_type(
+               struct bt_ctf_stream_class *stream_class)
+{
+       struct bt_ctf_field_type *ret = NULL;
+
+       if (!stream_class || !stream_class->event_header_type) {
+               goto end;
+       }
+
+       assert(stream_class->event_header_type);
+       bt_ctf_field_type_get(stream_class->event_header_type);
+       ret = stream_class->event_header_type;
+end:
+       return ret;
+}
+
+int bt_ctf_stream_class_set_event_header_type(
+               struct bt_ctf_stream_class *stream_class,
+               struct bt_ctf_field_type *event_header_type)
+{
+       int ret = 0;
+
+       if (!stream_class || !event_header_type || stream_class->frozen) {
+               ret = -1;
+               goto end;
+       }
+
+       if (bt_ctf_field_type_get_type_id(event_header_type) !=
+               CTF_TYPE_STRUCT) {
+               /* An event header must be a structure */
+               ret = -1;
+               goto end;
+       }
+
+       bt_ctf_field_type_put(stream_class->event_header_type);
+       bt_ctf_field_type_get(event_header_type);
+       stream_class->event_header_type = event_header_type;
+end:
+       return ret;
+}
+
+struct bt_ctf_field_type *bt_ctf_stream_class_get_event_context_type(
+               struct bt_ctf_stream_class *stream_class)
+{
+       struct bt_ctf_field_type *ret = NULL;
+
+       if (!stream_class || !stream_class->event_context_type) {
+               goto end;
+       }
+
+       assert(stream_class->event_context_type);
+       bt_ctf_field_type_get(stream_class->event_context_type);
+       ret = stream_class->event_context_type;
+end:
+       return ret;
+}
+
+int bt_ctf_stream_class_set_event_context_type(
+               struct bt_ctf_stream_class *stream_class,
+               struct bt_ctf_field_type *event_context_type)
+{
+       int ret = 0;
+
+       if (!stream_class || !event_context_type || stream_class->frozen) {
+               ret = -1;
+               goto end;
+       }
+
+       if (bt_ctf_field_type_get_type_id(event_context_type) !=
+               CTF_TYPE_STRUCT) {
+               /* A packet context must be a structure */
+               ret = -1;
+               goto end;
+       }
+
+       bt_ctf_field_type_put(stream_class->event_context_type);
+       bt_ctf_field_type_get(event_context_type);
+       stream_class->event_context_type = event_context_type;
+end:
+       return ret;
+}
+
 void bt_ctf_stream_class_get(struct bt_ctf_stream_class *stream_class)
 {
        if (!stream_class) {
@@ -283,6 +414,8 @@ void bt_ctf_stream_class_freeze(struct bt_ctf_stream_class *stream_class)
        }
 
        stream_class->frozen = 1;
+       bt_ctf_field_type_freeze(stream_class->packet_context_type);
+       bt_ctf_field_type_freeze(stream_class->event_context_type);
        bt_ctf_clock_freeze(stream_class->clock);
        g_ptr_array_foreach(stream_class->event_classes,
                (GFunc)bt_ctf_event_class_freeze, NULL);
@@ -294,11 +427,6 @@ int bt_ctf_stream_class_set_byte_order(struct bt_ctf_stream_class *stream_class,
 {
        int ret = 0;
 
-       ret = init_packet_context(stream_class, byte_order);
-       if (ret) {
-               goto end;
-       }
-
        ret = init_event_header(stream_class, byte_order);
        if (ret) {
                goto end;
@@ -351,10 +479,6 @@ int bt_ctf_stream_class_serialize(struct bt_ctf_stream_class *stream_class,
                struct bt_ctf_event_class *event_class =
                        stream_class->event_classes->pdata[i];
 
-               if (ret) {
-                       goto end;
-               }
-
                ret = bt_ctf_event_class_serialize(event_class, context);
                if (ret) {
                        goto end;
@@ -397,11 +521,10 @@ void bt_ctf_stream_class_destroy(struct bt_ctf_ref *ref)
        }
 
        bt_ctf_field_type_put(stream_class->event_header_type);
-       bt_ctf_field_put(stream_class->event_header);
        bt_ctf_field_type_put(stream_class->packet_context_type);
-       bt_ctf_field_put(stream_class->packet_context);
-       bt_ctf_field_type_put(stream_class->event_context_type);
-       bt_ctf_field_put(stream_class->event_context);
+       if (stream_class->event_context_type) {
+               bt_ctf_field_type_put(stream_class->event_context_type);
+       }
        g_free(stream_class);
 }
 
@@ -445,11 +568,6 @@ int init_event_header(struct bt_ctf_stream_class *stream_class,
        }
 
        stream_class->event_header_type = event_header_type;
-       stream_class->event_header = bt_ctf_field_create(
-               stream_class->event_header_type);
-       if (!stream_class->event_header) {
-               ret = -1;
-       }
 end:
        if (ret) {
                bt_ctf_field_type_put(event_header_type);
@@ -515,10 +633,6 @@ int init_packet_context(struct bt_ctf_stream_class *stream_class,
        }
 
        stream_class->packet_context_type = packet_context_type;
-       stream_class->packet_context = bt_ctf_field_create(packet_context_type);
-       if (!stream_class->packet_context) {
-               ret = -1;
-       }
 end:
        if (ret) {
                bt_ctf_field_type_put(packet_context_type);