extern "C" {
#endif
+/*!
+@defgroup api-comp-descr-set Component descriptor set
+@ingroup api-graph
+
+@brief
+ Set of descriptors of prospective \bt_p_comp to use with
+ bt_get_greatest_operative_mip_version().
+
+A <strong><em>component descriptor set</em></strong>
+is an \em unordered set of component descriptors.
+
+A <strong><em>component descriptor</em></strong> describes a
+prospective \bt_comp, that is, everything that is needed to
+\ref api-graph-lc-add "instantiate a component class" within a
+trace processing \bt_graph without actually doing it:
+
+- The <strong>component class</strong> to instantiate, which you would
+ pass as the \bt_p{component_class} parameter of one of the
+ <code>bt_graph_add_*_component*()</code> functions.
+
+- The <strong>initialization parameters</strong>, which you
+ would pass as the \bt_p{params} parameter of one of the
+ <code>bt_graph_add_*_component*()</code> functions.
+
+- The <strong>initialization method data</strong>, which you would pass
+ as the \bt_p{initialize_method_data} parameter of one of the
+ <code>bt_graph_add_*_component_with_initialize_method_data()</code>
+ functions.
+
+As of \bt_name_version_min_maj, the only use case of a component
+descriptor set is bt_get_greatest_operative_mip_version(). This
+function computes the greatest \bt_mip version which
+you can use to create a trace processing graph to which you intend
+to \ref api-graph-lc-add "add components" described by a set of
+component descriptors.
+
+A component descriptor set is a
+\ref api-fund-shared-object "shared object": get a new reference with
+bt_component_descriptor_set_get_ref() and put an existing reference with
+bt_component_descriptor_set_put_ref().
+
+Create an empty component descriptor set with
+bt_component_descriptor_set_create().
+
+Add a component descriptor to a component descriptor set with
+bt_component_descriptor_set_add_descriptor() and
+bt_component_descriptor_set_add_descriptor_with_initialize_method_data().
+*/
+
+/*! @{ */
+
+/*!
+@name Type
+@{
+
+@typedef struct bt_component_descriptor_set bt_component_descriptor_set;
+
+@brief
+ Component descriptor set.
+
+@}
+*/
+
+/*!
+@name Creation
+@{
+*/
+
+
+/*!
+@brief
+ Creates an empty component descriptor set.
+
+@returns
+ New component descriptor set reference, or \c NULL on memory error.
+*/
extern bt_component_descriptor_set *bt_component_descriptor_set_create(void);
+/*!
+@brief
+ Status codes for bt_component_descriptor_set_add_descriptor()
+ and
+ bt_component_descriptor_set_add_descriptor_with_initialize_method_data().
+*/
typedef enum bt_component_descriptor_set_add_descriptor_status {
+ /*!
+ @brief
+ Success.
+ */
BT_COMPONENT_DESCRIPTOR_SET_ADD_DESCRIPTOR_STATUS_OK = __BT_FUNC_STATUS_OK,
+
+ /*!
+ @brief
+ Out of memory.
+ */
BT_COMPONENT_DESCRIPTOR_SET_ADD_DESCRIPTOR_STATUS_MEMORY_ERROR = __BT_FUNC_STATUS_MEMORY_ERROR,
} bt_component_descriptor_set_add_descriptor_status;
+/*! @} */
+
+/*!
+@name Component descriptor adding
+@{
+*/
+
+/*!
+@brief
+ Alias of
+ bt_component_descriptor_set_add_descriptor_with_initialize_method_data()
+ with the \bt_p{initialize_method_data} parameter set to \c NULL.
+*/
extern bt_component_descriptor_set_add_descriptor_status
bt_component_descriptor_set_add_descriptor(
- bt_component_descriptor_set *comp_descriptor_set,
+ bt_component_descriptor_set *component_descriptor_set,
const bt_component_class *component_class,
const bt_value *params);
+/*!
+@brief
+ Adds a descriptor of a \bt_comp which would be an instance of the
+ \bt_comp_cls \bt_p{component_class}, would receive the parameters
+ \bt_p{params} and the method data \bt_p{initialize_method_data} at
+ initialization time, to the component descriptor set
+ \bt_p{component_descriptor_set}.
+
+@param[in] component_descriptor_set
+ Component descriptor set to which to add a component descriptor.
+@param[in] component_class
+ \bt_c_comp_cls which would be instantiated to create the
+ described component.
+@param[in] params
+ @parblock
+ Parameters which would be passed to the initialization method of
+ the described component as the \bt_p{params} parameter.
+
+ Can be \c NULL, in which case it is equivalent to passing an empty
+ \bt_map_val.
+ @endparblock
+@param[in] initialize_method_data
+ User data which would be passed to the initialization method of
+ the described component as the \bt_p{initialize_method_data}
+ parameter.
+
+@retval #BT_COMPONENT_DESCRIPTOR_SET_ADD_DESCRIPTOR_STATUS_OK
+ Success.
+@retval #BT_COMPONENT_DESCRIPTOR_SET_ADD_DESCRIPTOR_STATUS_MEMORY_ERROR
+ Out of memory.
+
+@bt_pre_not_null{component_descriptor_set}
+@bt_pre_not_null{component_class}
+@pre
+ \bt_p{params} is a \bt_map_val (bt_value_is_map() returns #BT_TRUE)
+ or is \c NULL.
+
+@bt_post_success_frozen{component_class}
+@bt_post_success_frozen{params}
+*/
extern bt_component_descriptor_set_add_descriptor_status
bt_component_descriptor_set_add_descriptor_with_initialize_method_data(
- bt_component_descriptor_set *comp_descriptor_set,
+ bt_component_descriptor_set *component_descriptor_set,
const bt_component_class *component_class,
- const bt_value *params, void *init_method_data);
+ const bt_value *params, void *initialize_method_data);
+
+/*! @} */
+
+/*!
+@name Reference count
+@{
+*/
+
+/*!
+@brief
+ Increments the \ref api-fund-shared-object "reference count" of
+ the component descriptor set \bt_p{component_descriptor_set}.
+
+@param[in] component_descriptor_set
+ @parblock
+ Component descriptor set of which to increment the reference count.
+
+ Can be \c NULL.
+ @endparblock
+
+@sa bt_component_descriptor_set_put_ref() —
+ Decrements the reference count of a component descriptor set.
+*/
+extern void bt_component_descriptor_set_get_ref(
+ const bt_component_descriptor_set *component_descriptor_set);
+
+/*!
+@brief
+ Decrements the \ref api-fund-shared-object "reference count" of
+ the component descriptor set \bt_p{component_descriptor_set}.
+
+@param[in] component_descriptor_set
+ @parblock
+ Component descriptor set of which to decrement the reference count.
+
+ Can be \c NULL.
+ @endparblock
+
+@sa bt_component_descriptor_set_get_ref() —
+ Increments the reference count of a component descriptor set.
+*/
+extern void bt_component_descriptor_set_put_ref(
+ const bt_component_descriptor_set *component_descriptor_set);
+
+/*!
+@brief
+ Decrements the reference count of the component descriptor set
+ \bt_p{_component_descriptor_set}, and then sets
+ \bt_p{_component_descriptor_set} to \c NULL.
+
+@param _component_descriptor_set
+ @parblock
+ Component descriptor set of which to decrement the reference count.
+
+ Can contain \c NULL.
+ @endparblock
+
+@bt_pre_assign_expr{_component_descriptor_set}
+*/
+#define BT_COMPONENT_DESCRIPTOR_SET_PUT_REF_AND_RESET(_component_descriptor_set) \
+ do { \
+ bt_component_descriptor_set_put_ref(_component_descriptor_set); \
+ (_component_descriptor_set) = NULL; \
+ } while (0)
+
+/*!
+@brief
+ Decrements the reference count of the component descriptor set
+ \bt_p{_dst}, sets \bt_p{_dst} to \bt_p{_src}, and then sets
+ \bt_p{_src} to \c NULL.
+
+This macro effectively moves a component descriptor set reference from
+the expression \bt_p{_src} to the expression \bt_p{_dst}, putting the
+existing \bt_p{_dst} reference.
+
+@param _dst
+ @parblock
+ Destination expression.
+
+ Can contain \c NULL.
+ @endparblock
+@param _src
+ @parblock
+ Source expression.
+
+ Can contain \c NULL.
+ @endparblock
+
+@bt_pre_assign_expr{_dst}
+@bt_pre_assign_expr{_src}
+*/
+#define BT_COMPONENT_DESCRIPTOR_SET_MOVE_REF(_dst, _src) \
+ do { \
+ bt_component_descriptor_set_put_ref(_dst); \
+ (_dst) = (_src); \
+ (_src) = NULL; \
+ } while (0)
+
+/*! @} */
+
+/*! @} */
#ifdef __cplusplus
}
projects / babeltrace.git / blobdiff