ir: add bt_ctf_trace_get_stream_class_by_id()
[babeltrace.git] / formats / ctf / ir / trace.c
index 3f9bdb86f8962c3d5f970776e1e84a6f4bc2ae48..9c3cb5072a593b0e5cde93425eda3ae5b004c6fe 100644 (file)
 #include <babeltrace/ctf-ir/stream-class-internal.h>
 #include <babeltrace/ctf-writer/functor-internal.h>
 #include <babeltrace/ctf-ir/event-types-internal.h>
+#include <babeltrace/ctf-ir/attributes-internal.h>
+#include <babeltrace/ctf-ir/visitor-internal.h>
 #include <babeltrace/ctf-ir/utils.h>
+#include <babeltrace/ctf-ir/ref.h>
+#include <babeltrace/ctf-ir/common-internal.h>
 #include <babeltrace/compiler.h>
+#include <babeltrace/values.h>
 
 #define DEFAULT_IDENTIFIER_SIZE 128
 #define DEFAULT_METADATA_STRING_SIZE 4096
 
 static
-void environment_variable_destroy(struct environment_variable *var);
-static
-void bt_ctf_trace_destroy(struct bt_ctf_ref *ref);
+void bt_ctf_trace_destroy(struct bt_ref *ref);
 static
 int init_trace_packet_header(struct bt_ctf_trace *trace);
+static
+int bt_ctf_trace_freeze(struct bt_ctf_trace *trace);
 
 static
 const unsigned int field_type_aliases_alignments[] = {
@@ -63,6 +68,13 @@ const unsigned int field_type_aliases_sizes[] = {
        [FIELD_TYPE_ALIAS_UINT64_T] = 64,
 };
 
+static
+void put_stream_class(struct bt_ctf_stream_class *stream_class)
+{
+       (void) bt_ctf_stream_class_set_trace(stream_class, NULL);
+       bt_ctf_stream_class_put(stream_class);
+}
+
 struct bt_ctf_trace *bt_ctf_trace_create(void)
 {
        struct bt_ctf_trace *trace = NULL;
@@ -73,17 +85,14 @@ struct bt_ctf_trace *bt_ctf_trace_create(void)
        }
 
        bt_ctf_trace_set_byte_order(trace, BT_CTF_BYTE_ORDER_NATIVE);
-       bt_ctf_ref_init(&trace->ref_count);
-       trace->environment = g_ptr_array_new_with_free_func(
-               (GDestroyNotify)environment_variable_destroy);
+       bt_ctf_base_init(trace, bt_ctf_trace_destroy);
        trace->clocks = g_ptr_array_new_with_free_func(
-               (GDestroyNotify)bt_ctf_clock_put);
+               (GDestroyNotify) bt_ctf_clock_put);
        trace->streams = g_ptr_array_new_with_free_func(
-               (GDestroyNotify)bt_ctf_stream_put);
+               (GDestroyNotify) bt_ctf_stream_put);
        trace->stream_classes = g_ptr_array_new_with_free_func(
-               (GDestroyNotify)bt_ctf_stream_class_put);
-       if (!trace->environment || !trace->clocks ||
-               !trace->stream_classes || !trace->streams) {
+               (GDestroyNotify) put_stream_class);
+       if (!trace->clocks || !trace->stream_classes || !trace->streams) {
                goto error_destroy;
        }
 
@@ -93,26 +102,34 @@ struct bt_ctf_trace *bt_ctf_trace_create(void)
                goto error_destroy;
        }
 
+       /* Create the environment array object */
+       trace->environment = bt_ctf_attributes_create();
+       if (!trace->environment) {
+               goto error_destroy;
+       }
+
        return trace;
 
 error_destroy:
-       bt_ctf_trace_destroy(&trace->ref_count);
+       bt_ctf_trace_destroy(&trace->base.ref_count);
        trace = NULL;
 error:
        return trace;
 }
 
-void bt_ctf_trace_destroy(struct bt_ctf_ref *ref)
+void bt_ctf_trace_destroy(struct bt_ref *ref)
 {
        struct bt_ctf_trace *trace;
+       struct bt_ctf_base *base;
 
        if (!ref) {
                return;
        }
 
-       trace = container_of(ref, struct bt_ctf_trace, ref_count);
+       base = container_of(ref, struct bt_ctf_base, ref_count);
+       trace = container_of(base, struct bt_ctf_trace, base);
        if (trace->environment) {
-               g_ptr_array_free(trace->environment, TRUE);
+               bt_ctf_attributes_destroy(trace->environment);
        }
 
        if (trace->clocks) {
@@ -143,11 +160,6 @@ struct bt_ctf_stream *bt_ctf_trace_create_stream(struct bt_ctf_trace *trace,
                goto error;
        }
 
-       stream = bt_ctf_stream_create(stream_class, trace);
-       if (!stream) {
-               goto error;
-       }
-
        for (i = 0; i < trace->stream_classes->len; i++) {
                if (trace->stream_classes->pdata[i] == stream_class) {
                        stream_class_found = 1;
@@ -161,6 +173,11 @@ struct bt_ctf_stream *bt_ctf_trace_create_stream(struct bt_ctf_trace *trace,
                }
        }
 
+       stream = bt_ctf_stream_create(stream_class, trace);
+       if (!stream) {
+               goto error;
+       }
+
        bt_ctf_stream_get(stream);
        g_ptr_array_add(trace->streams, stream);
 
@@ -170,96 +187,137 @@ error:
        return NULL;
 }
 
-int bt_ctf_trace_add_environment_field(struct bt_ctf_trace *trace,
-               const char *name,
-               const char *value)
+int bt_ctf_trace_set_environment_field(struct bt_ctf_trace *trace,
+               const char *name, struct bt_value *value)
 {
-       struct environment_variable *var = NULL;
-       char *escaped_value = NULL;
        int ret = 0;
 
-       if (!trace || !name || !value || bt_ctf_validate_identifier(name)) {
+       if (!trace || !name || !value ||
+               bt_ctf_validate_identifier(name) ||
+               !(bt_value_is_integer(value) || bt_value_is_string(value))) {
                ret = -1;
-               goto error;
+               goto end;
        }
 
        if (strchr(name, ' ')) {
                ret = -1;
-               goto error;
+               goto end;
        }
 
-       var = g_new0(struct environment_variable, 1);
-       if (!var) {
-               ret = -1;
-               goto error;
+       if (trace->frozen) {
+               /*
+                * New environment fields may be added to a frozen trace,
+                * but existing fields may not be changed.
+                *
+                * The object passed is frozen like all other attributes.
+                */
+               struct bt_value *attribute =
+                       bt_ctf_attributes_get_field_value_by_name(
+                               trace->environment, name);
+
+               if (attribute) {
+                       BT_VALUE_PUT(attribute);
+                       ret = -1;
+                       goto end;
+               }
+
+               bt_value_freeze(value);
        }
 
-       var->type = BT_ENVIRONMENT_FIELD_TYPE_STRING;
-       escaped_value = g_strescape(value, NULL);
-       if (!escaped_value) {
+       ret = bt_ctf_attributes_set_field_value(trace->environment, name,
+               value);
+
+end:
+       return ret;
+}
+
+int bt_ctf_trace_set_environment_field_string(struct bt_ctf_trace *trace,
+               const char *name, const char *value)
+{
+       int ret = 0;
+       struct bt_value *env_value_string_obj = NULL;
+
+       if (!trace || !name || !value) {
                ret = -1;
-               goto error;
+               goto end;
        }
 
-       var->name = g_string_new(name);
-       var->value.string = g_string_new(escaped_value);
-       g_free(escaped_value);
-       if (!var->name || !var->value.string) {
-               ret = -1;
-               goto error;
+       if (trace->frozen) {
+               /*
+                * New environment fields may be added to a frozen trace,
+                * but existing fields may not be changed.
+                */
+               struct bt_value *attribute =
+                       bt_ctf_attributes_get_field_value_by_name(
+                               trace->environment, name);
+
+               if (attribute) {
+                       BT_VALUE_PUT(attribute);
+                       ret = -1;
+                       goto end;
+               }
        }
 
-       g_ptr_array_add(trace->environment, var);
-       return ret;
+       env_value_string_obj = bt_value_string_create_init(value);
 
-error:
-       if (var && var->name) {
-               g_string_free(var->name, TRUE);
+       if (!env_value_string_obj) {
+               ret = -1;
+               goto end;
        }
 
-       if (var && var->value.string) {
-               g_string_free(var->value.string, TRUE);
+       if (trace->frozen) {
+               bt_value_freeze(env_value_string_obj);
        }
+       ret = bt_ctf_trace_set_environment_field(trace, name,
+               env_value_string_obj);
+
+end:
+       BT_VALUE_PUT(env_value_string_obj);
 
-       g_free(var);
        return ret;
 }
 
-int bt_ctf_trace_add_environment_field_integer(struct bt_ctf_trace *trace,
-               const char *name,
-               int64_t value)
+int bt_ctf_trace_set_environment_field_integer(struct bt_ctf_trace *trace,
+               const char *name, int64_t value)
 {
-       struct environment_variable *var = NULL;
        int ret = 0;
+       struct bt_value *env_value_integer_obj = NULL;
 
        if (!trace || !name) {
                ret = -1;
-               goto error;
+               goto end;
        }
 
-       var = g_new0(struct environment_variable, 1);
-       if (!var) {
-               ret = -1;
-               goto error;
+       if (trace->frozen) {
+               /*
+                * New environment fields may be added to a frozen trace,
+                * but existing fields may not be changed.
+                */
+               struct bt_value *attribute =
+                       bt_ctf_attributes_get_field_value_by_name(
+                               trace->environment, name);
+
+               if (attribute) {
+                       BT_VALUE_PUT(attribute);
+                       ret = -1;
+                       goto end;
+               }
        }
 
-       var->type = BT_ENVIRONMENT_FIELD_TYPE_INTEGER;
-       var->name = g_string_new(name);
-       var->value.integer = value;
-       if (!var->name) {
+       env_value_integer_obj = bt_value_integer_create_init(value);
+       if (!env_value_integer_obj) {
                ret = -1;
-               goto error;
+               goto end;
        }
 
-       g_ptr_array_add(trace->environment, var);
-       return ret;
-
-error:
-       if (var && var->name) {
-               g_string_free(var->name, TRUE);
+       ret = bt_ctf_trace_set_environment_field(trace, name,
+               env_value_integer_obj);
+       if (trace->frozen) {
+               bt_value_freeze(env_value_integer_obj);
        }
+end:
+       BT_VALUE_PUT(env_value_integer_obj);
 
-       g_free(var);
        return ret;
 }
 
@@ -272,82 +330,55 @@ int bt_ctf_trace_get_environment_field_count(struct bt_ctf_trace *trace)
                goto end;
        }
 
-       ret = trace->environment->len;
-end:
-       return ret;
-}
-
-enum bt_environment_field_type
-bt_ctf_trace_get_environment_field_type(struct bt_ctf_trace *trace, int index)
-{
-       struct environment_variable *var;
-       enum bt_environment_field_type type = BT_ENVIRONMENT_FIELD_TYPE_UNKNOWN;
-
-       if (!trace || index < 0 || index >= trace->environment->len) {
-               goto end;
-       }
+       ret = bt_ctf_attributes_get_count(trace->environment);
 
-       var = g_ptr_array_index(trace->environment, index);
-       type = var->type;
 end:
-       return type;
+       return ret;
 }
 
 const char *
 bt_ctf_trace_get_environment_field_name(struct bt_ctf_trace *trace,
                int index)
 {
-       struct environment_variable *var;
        const char *ret = NULL;
 
-       if (!trace || index < 0 || index >= trace->environment->len) {
+       if (!trace) {
                goto end;
        }
 
-       var = g_ptr_array_index(trace->environment, index);
-       ret = var->name->str;
+       ret = bt_ctf_attributes_get_field_name(trace->environment, index);
+
 end:
        return ret;
 }
 
-const char *
-bt_ctf_trace_get_environment_field_value_string(struct bt_ctf_trace *trace,
-               int index)
+struct bt_value *bt_ctf_trace_get_environment_field_value(
+               struct bt_ctf_trace *trace, int index)
 {
-       struct environment_variable *var;
-       const char *ret = NULL;
+       struct bt_value *ret = NULL;
 
-       if (!trace || index < 0 || index >= trace->environment->len) {
+       if (!trace) {
                goto end;
        }
 
-       var = g_ptr_array_index(trace->environment, index);
-       if (var->type != BT_ENVIRONMENT_FIELD_TYPE_STRING) {
-               goto end;
-       }
-       ret = var->value.string->str;
+       ret = bt_ctf_attributes_get_field_value(trace->environment, index);
+
 end:
        return ret;
 }
 
-int
-bt_ctf_trace_get_environment_field_value_integer(struct bt_ctf_trace *trace,
-               int index, int64_t *value)
+struct bt_value *bt_ctf_trace_get_environment_field_value_by_name(
+               struct bt_ctf_trace *trace, const char *name)
 {
-       struct environment_variable *var;
-       int ret = 0;
+       struct bt_value *ret = NULL;
 
-       if (!trace || !value || index < 0 || index >= trace->environment->len) {
-               ret = -1;
+       if (!trace || !name) {
                goto end;
        }
 
-       var = g_ptr_array_index(trace->environment, index);
-       if (var->type != BT_ENVIRONMENT_FIELD_TYPE_INTEGER) {
-               ret = -1;
-               goto end;
-       }
-       *value = var->value.integer;
+       ret = bt_ctf_attributes_get_field_value_by_name(trace->environment,
+               name);
+
 end:
        return ret;
 }
@@ -417,11 +448,17 @@ int bt_ctf_trace_add_stream_class(struct bt_ctf_trace *trace,
 
        for (i = 0; i < trace->stream_classes->len; i++) {
                if (trace->stream_classes->pdata[i] == stream_class) {
+                       /* Stream already registered to the trace */
                        ret = -1;
                        goto end;
                }
        }
 
+       ret = bt_ctf_stream_class_resolve_types(stream_class, trace);
+       if (ret) {
+               goto end;
+       }
+
        stream_id = bt_ctf_stream_class_get_id(stream_class);
        if (stream_id < 0) {
                stream_id = trace->next_stream_id++;
@@ -436,7 +473,7 @@ int bt_ctf_trace_add_stream_class(struct bt_ctf_trace *trace,
                        }
                }
 
-               if (_bt_ctf_stream_class_set_id(stream_class,
+               if (bt_ctf_stream_class_set_id_no_check(stream_class,
                        stream_id)) {
                        /* TODO Should retry with a different stream id */
                        ret = -1;
@@ -444,6 +481,13 @@ int bt_ctf_trace_add_stream_class(struct bt_ctf_trace *trace,
                }
        }
 
+       /* Set weak reference to trace in stream class */
+       ret = bt_ctf_stream_class_set_trace(stream_class, trace);
+       if (ret) {
+               /* Stream class already part of another trace */
+               goto end;
+       }
+
        bt_ctf_stream_class_get(stream_class);
        g_ptr_array_add(trace->stream_classes, stream_class);
 
@@ -461,10 +505,16 @@ int bt_ctf_trace_add_stream_class(struct bt_ctf_trace *trace,
        if (ret) {
                goto end;
        }
-       bt_ctf_stream_class_freeze(stream_class);
-       trace->frozen = 1;
 
+       bt_ctf_stream_class_freeze(stream_class);
+       if (!trace->frozen) {
+               ret = bt_ctf_trace_freeze(trace);
+               goto end;
+       }
 end:
+       if (ret) {
+               (void) bt_ctf_stream_class_set_trace(stream_class, NULL);
+       }
        return ret;
 }
 
@@ -497,6 +547,34 @@ end:
        return stream_class;
 }
 
+struct bt_ctf_stream_class *bt_ctf_trace_get_stream_class_by_id(
+               struct bt_ctf_trace *trace, uint32_t id)
+{
+       int i;
+       struct bt_ctf_stream_class *stream_class = NULL;
+
+       if (!trace) {
+               goto end;
+       }
+
+       for (i = 0; i < trace->stream_classes->len; ++i) {
+               struct bt_ctf_stream_class *stream_class_candidate;
+
+               stream_class_candidate =
+                       g_ptr_array_index(trace->stream_classes, i);
+
+               if (bt_ctf_stream_class_get_id(stream_class_candidate) ==
+                               (int64_t) id) {
+                       stream_class = stream_class_candidate;
+                       bt_ctf_get(stream_class);
+                       goto end;
+               }
+       }
+
+end:
+       return stream_class;
+}
+
 struct bt_ctf_clock *bt_ctf_trace_get_clock_by_name(
                struct bt_ctf_trace *trace, const char *name)
 {
@@ -583,35 +661,85 @@ end:
        return ret;
 }
 
-static
-void append_env_field_metadata(struct environment_variable *var,
-               struct metadata_context *context)
-{
-       switch (var->type) {
-       case BT_ENVIRONMENT_FIELD_TYPE_STRING:
-               g_string_append_printf(context->string, "\t%s = \"%s\";\n",
-                       var->name->str, var->value.string->str);
-               break;
-       case BT_ENVIRONMENT_FIELD_TYPE_INTEGER:
-               g_string_append_printf(context->string, "\t%s = %" PRId64 ";\n",
-                       var->name->str, var->value.integer);
-               break;
-       default:
-               assert(0);
-       }
-}
-
 static
 void append_env_metadata(struct bt_ctf_trace *trace,
                struct metadata_context *context)
 {
-       if (trace->environment->len == 0) {
+       int i;
+       int env_size;
+
+       env_size = bt_ctf_attributes_get_count(trace->environment);
+
+       if (env_size <= 0) {
                return;
        }
 
        g_string_append(context->string, "env {\n");
-       g_ptr_array_foreach(trace->environment,
-               (GFunc)append_env_field_metadata, context);
+
+       for (i = 0; i < env_size; ++i) {
+               struct bt_value *env_field_value_obj = NULL;
+               const char *entry_name;
+
+               entry_name = bt_ctf_attributes_get_field_name(
+                       trace->environment, i);
+               env_field_value_obj = bt_ctf_attributes_get_field_value(
+                       trace->environment, i);
+
+               if (!entry_name || !env_field_value_obj) {
+                       goto loop_next;
+               }
+
+               switch (bt_value_get_type(env_field_value_obj)) {
+               case BT_VALUE_TYPE_INTEGER:
+               {
+                       int ret;
+                       int64_t int_value;
+
+                       ret = bt_value_integer_get(env_field_value_obj,
+                               &int_value);
+
+                       if (ret) {
+                               goto loop_next;
+                       }
+
+                       g_string_append_printf(context->string,
+                               "\t%s = %" PRId64 ";\n", entry_name,
+                               int_value);
+                       break;
+               }
+               case BT_VALUE_TYPE_STRING:
+               {
+                       int ret;
+                       const char *str_value;
+                       char *escaped_str = NULL;
+
+                       ret = bt_value_string_get(env_field_value_obj,
+                               &str_value);
+
+                       if (ret) {
+                               goto loop_next;
+                       }
+
+                       escaped_str = g_strescape(str_value, NULL);
+
+                       if (!escaped_str) {
+                               goto loop_next;
+                       }
+
+                       g_string_append_printf(context->string,
+                               "\t%s = \"%s\";\n", entry_name, escaped_str);
+                       free(escaped_str);
+                       break;
+               }
+
+               default:
+                       goto loop_next;
+               }
+
+loop_next:
+               BT_VALUE_PUT(env_field_value_obj);
+       }
+
        g_string_append(context->string, "};\n\n");
 }
 
@@ -763,39 +891,49 @@ end:
 
 void bt_ctf_trace_get(struct bt_ctf_trace *trace)
 {
-       if (!trace) {
-               return;
-       }
-
-       bt_ctf_ref_get(&trace->ref_count);
+       bt_ctf_get(trace);
 }
 
 void bt_ctf_trace_put(struct bt_ctf_trace *trace)
 {
-       if (!trace) {
-               return;
-       }
+       bt_ctf_put(trace);
 
-       bt_ctf_ref_put(&trace->ref_count, bt_ctf_trace_destroy);
 }
 
 BT_HIDDEN
 struct bt_ctf_field_type *get_field_type(enum field_type_alias alias)
 {
        unsigned int alignment, size;
-       struct bt_ctf_field_type *field_type;
+       struct bt_ctf_field_type *field_type = NULL;
 
        if (alias >= NR_FIELD_TYPE_ALIAS) {
-               return NULL;
+               goto end;
        }
 
        alignment = field_type_aliases_alignments[alias];
        size = field_type_aliases_sizes[alias];
        field_type = bt_ctf_field_type_integer_create(size);
        bt_ctf_field_type_set_alignment(field_type, alignment);
+end:
        return field_type;
 }
 
+static
+int bt_ctf_trace_freeze(struct bt_ctf_trace *trace)
+{
+       int ret = 0;
+
+       ret = bt_ctf_trace_resolve_types(trace);
+       if (ret) {
+               goto end;
+       }
+
+       bt_ctf_attributes_freeze(trace->environment);
+       trace->frozen = 1;
+end:
+       return ret;
+}
+
 static
 int init_trace_packet_header(struct bt_ctf_trace *trace)
 {
@@ -848,13 +986,3 @@ end:
 
        return ret;
 }
-
-static
-void environment_variable_destroy(struct environment_variable *var)
-{
-       g_string_free(var->name, TRUE);
-       if (var->type == BT_ENVIRONMENT_FIELD_TYPE_STRING) {
-               g_string_free(var->value.string, TRUE);
-       }
-       g_free(var);
-}
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