doc/api/libbabeltrace2/DoxygenLayout.xml: use `topics` tab

[babeltrace.git] / src / plugins / ctf / lttng-live / metadata.cpp

diff --git a/src/plugins/ctf/lttng-live/metadata.cpp b/src/plugins/ctf/lttng-live/metadata.cpp
index b0a3c5e746a6e93582b085eda11d4a164b6c1cab..693042d7bf228be5acae70c22b82f85887c238f6 100644 (file)
--- a/src/plugins/ctf/lttng-live/metadata.cpp
+++ b/src/plugins/ctf/lttng-live/metadata.cpp
@@ -8,6 +8,7 @@
 
 #include "compat/memstream.h"
 #include "cpp-common/bt2c/libc-up.hpp"
+#include "cpp-common/bt2s/make-unique.hpp"
 
 #include "../common/src/metadata/tsdl/ctf-meta-configure-ir-trace.hpp"
 #include "../common/src/metadata/tsdl/decoder.hpp"
@@ -36,7 +37,6 @@ static bool stream_classes_all_have_default_clock_class(bt_trace_class *tc,
     uint64_t i, sc_count;
     const bt_clock_class *cc = NULL;
     const bt_stream_class *sc;
-    bool ret = true;
 
     sc_count = bt_trace_class_get_stream_class_count(tc);
     for (i = 0; i < sc_count; i++) {
@@ -46,17 +46,15 @@ static bool stream_classes_all_have_default_clock_class(bt_trace_class *tc,
 
         cc = bt_stream_class_borrow_default_clock_class_const(sc);
         if (!cc) {
-            ret = false;
             BT_CPPLOGE_APPEND_CAUSE_SPEC(logger,
                                          "Stream class doesn't have a default clock class: "
                                          "sc-id={}, sc-name=\"{}\"",
                                          bt_stream_class_get_id(sc), bt_stream_class_get_name(sc));
-            goto end;
+            return false;
         }
     }
 
-end:
-    return ret;
+    return true;
 }
 /*
  * Iterate over the stream classes and returns the first clock class
@@ -76,23 +74,21 @@ static const bt_clock_class *borrow_any_clock_class(bt_trace_class *tc)
 
         cc = bt_stream_class_borrow_default_clock_class_const(sc);
         if (cc) {
-            goto end;
+            return cc;
         }
     }
-end:
-    BT_ASSERT_DBG(cc);
-    return cc;
+
+    bt_common_abort();
 }
 
 enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_trace *trace)
 {
     struct lttng_live_session *session = trace->session;
-    struct lttng_live_metadata *metadata = trace->metadata;
+    struct lttng_live_metadata *metadata = trace->metadata.get();
     std::vector<char> metadataBuf;
     bool keep_receiving;
     bt2c::FileUP fp;
     enum ctf_metadata_decoder_status decoder_status;
-    enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK;
     enum lttng_live_get_one_metadata_status metadata_status;
 
     BT_CPPLOGD_SPEC(metadata->logger, "Updating metadata for trace: session-id={}, trace-id={}",
@@ -106,18 +102,17 @@ enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_tra
              * metadata this indicates that we will never receive
              * any metadata.
              */
-            status = LTTNG_LIVE_ITERATOR_STATUS_END;
+            return LTTNG_LIVE_ITERATOR_STATUS_END;
         } else if (session->new_streams_needed) {
-            status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
+            return LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
         } else {
             session->new_streams_needed = true;
-            status = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
+            return LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
         }
-        goto end;
     }
 
     if (trace->metadata_stream_state != LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) {
-        goto end;
+        return LTTNG_LIVE_ITERATOR_STATUS_OK;
     }
 
     keep_receiving = true;
@@ -162,7 +157,7 @@ enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_tra
             BT_CPPLOGE_APPEND_CAUSE_SPEC(metadata->logger,
                                          "Error getting one trace metadata packet: trace-id={}",
                                          trace->id);
-            goto error;
+            return LTTNG_LIVE_ITERATOR_STATUS_ERROR;
         default:
             bt_common_abort();
         }
@@ -170,13 +165,12 @@ enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_tra
 
     if (metadataBuf.empty()) {
         if (!trace->trace) {
-            status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
-            goto end;
+            return LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
         }
 
         /* The relay sent zero bytes of metadata. */
         trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
-        goto end;
+        return LTTNG_LIVE_ITERATOR_STATUS_OK;
     }
 
     /*
@@ -187,13 +181,12 @@ enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_tra
     if (!fp) {
         if (errno == EINTR && lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
             session->lttng_live_msg_iter->was_interrupted = true;
-            status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
+            return LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
         } else {
             BT_CPPLOGE_ERRNO_APPEND_CAUSE_SPEC(metadata->logger,
                                                "Cannot memory-open metadata buffer", ".");
-            status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+            return LTTNG_LIVE_ITERATOR_STATUS_ERROR;
         }
-        goto end;
     }
 
     /*
@@ -212,7 +205,7 @@ enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_tra
             trace->trace = trace->trace_class->instantiate();
             if (!trace->trace) {
                 BT_CPPLOGE_APPEND_CAUSE_SPEC(metadata->logger, "Failed to create bt_trace");
-                goto error;
+                return LTTNG_LIVE_ITERATOR_STATUS_ERROR;
             }
 
             ctf_trace_class_configure_ir_trace(tc, *trace->trace);
@@ -220,7 +213,7 @@ enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_tra
             if (!stream_classes_all_have_default_clock_class(trace->trace_class->libObjPtr(),
                                                              metadata->logger)) {
                 /* Error logged in function. */
-                goto error;
+                return LTTNG_LIVE_ITERATOR_STATUS_ERROR;
             }
             trace->clock_class = borrow_any_clock_class(trace->trace_class->libObjPtr());
         }
@@ -228,17 +221,10 @@ enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_tra
         /* The metadata was updated successfully. */
         trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED;
 
-        break;
+        return LTTNG_LIVE_ITERATOR_STATUS_OK;
     default:
-        goto error;
+        return LTTNG_LIVE_ITERATOR_STATUS_ERROR;
     }
-
-    goto end;
-
-error:
-    status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
-end:
-    return status;
 }
 
 int lttng_live_metadata_create_stream(struct lttng_live_session *session, uint64_t ctf_trace_id,
@@ -250,34 +236,21 @@ int lttng_live_metadata_create_stream(struct lttng_live_session *session, uint64
     cfg.self_comp = session->self_comp;
     cfg.create_trace_class = true;
 
-    lttng_live_metadata *metadata = new lttng_live_metadata {session->logger};
+    auto metadata = bt2s::make_unique<lttng_live_metadata>(session->logger);
     metadata->stream_id = stream_id;
 
     metadata->decoder = ctf_metadata_decoder_create(&cfg);
     if (!metadata->decoder) {
         BT_CPPLOGE_APPEND_CAUSE_SPEC(session->logger, "Failed to create CTF metadata decoder");
-        goto error;
+        return -1;
     }
+
     trace = lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id);
     if (!trace) {
         BT_CPPLOGE_APPEND_CAUSE_SPEC(session->logger, "Failed to borrow trace");
-        goto error;
+        return -1;
     }
-    trace->metadata = metadata;
-    return 0;
-
-error:
-    delete metadata;
-    return -1;
-}
-
-void lttng_live_metadata_fini(struct lttng_live_trace *trace)
-{
-    struct lttng_live_metadata *metadata = trace->metadata;
 
-    if (!metadata) {
-        return;
-    }
-    trace->metadata = NULL;
-    delete metadata;
+    trace->metadata = std::move(metadata);
+    return 0;
 }