X-Git-Url: http://drtracing.org/?a=blobdiff_plain;ds=sidebyside;f=include%2Fbabeltrace%2Fctf-ir%2Fevent.h;h=67df08b5e53c390f67592c9ba34e87727500ecd6;hb=44c440bc5fe8219cc17d1b786d91fd83c4c9860a;hp=e416627a1fb77340a0b0d419ed94b2645d44960f;hpb=50842bdc4c21f3de2b63e29cdac730af8b6dcca6;p=babeltrace.git diff --git a/include/babeltrace/ctf-ir/event.h b/include/babeltrace/ctf-ir/event.h index e416627a..67df08b5 100644 --- a/include/babeltrace/ctf-ir/event.h +++ b/include/babeltrace/ctf-ir/event.h @@ -33,545 +33,44 @@ #include #include +/* For enum bt_clock_value_status */ +#include + #ifdef __cplusplus extern "C" { #endif -struct bt_value; -struct bt_clock_class; - -/** -@defgroup ctfirevent CTF IR event -@ingroup ctfir -@brief CTF IR event. - -@code -#include -@endcode - -A CTF IR event is a container of event -fields: - -- Stream event header field, described by the - stream event header field type of a - \link ctfirstreamclass CTF IR stream class\endlink. -- Stream event context field, described by the - stream event context field type of a stream class. -- Event context field, described by the - event context field type of a - \link ctfireventclass CTF IR event class\endlink. -- Event payload, described by the - event payload field type of an event class. - -As a reminder, here's the structure of a CTF packet: - -@imgpacketstructure - -You can create a CTF IR event \em from a -\link ctfireventclass CTF IR event class\endlink with -bt_event_create(). The event class you use to create an event -object becomes its parent. - -If the \link ctfirtraceclass CTF IR trace class\endlink of an event -object (parent of its \link ctfirstreamclass CTF IR stream class\endlink, -which is the parent of its event class) was created by a -\link ctfwriter CTF writer\endlink object, then the only possible -action you can do with this event object is to append it to a -\link ctfirstream CTF IR stream\endlink with -bt_stream_append_event(). Otherwise, you can create an event -notification with bt_notification_event_create(). The event you pass -to this function \em must have an attached packet object first. - -You can attach a \link ctfirpacket CTF IR packet object\endlink to an -event object with bt_event_set_packet(). - -A CTF IR event has a mapping of -\link ctfirclockvalue CTF IR clock values\endlink. A clock value is -an instance of a specific -\link ctfirclockclass CTF IR clock class\endlink when the event is -emitted. You can set an event object's clock value with -bt_event_set_clock_value(). - -As with any Babeltrace object, CTF IR event objects have -reference -counts. See \ref refs to learn more about the reference counting -management of Babeltrace objects. - -bt_notification_event_create() \em freezes its event parameter on -success. You cannot modify a frozen event object: it is considered -immutable, except for \link refs reference counting\endlink. - -@sa ctfireventclass -@sa ctfirpacket - -@file -@brief CTF IR event type and functions. -@sa ctfirevent - -@addtogroup ctfirevent -@{ -*/ - -/** -@struct bt_event -@brief A CTF IR event. -@sa ctfirevent -*/ struct bt_event; -struct bt_clock; +struct bt_event_header_field; struct bt_clock_value; struct bt_event_class; struct bt_field; -struct bt_field_type; -struct bt_stream_class; struct bt_packet; -/** -@name Creation and parent access functions -@{ -*/ - -/** -@brief Creates a default CTF IR event from the CTF IR event class - \p event_class. - -\p event_class \em must have a parent -\link ctfirstreamclass CTF IR stream class\endlink. - -On success, the four fields of the created event object are not set. You -can set them with bt_event_set_header(), -bt_event_set_stream_event_context(), -bt_event_set_event_context(), and bt_event_set_event_payload(). - -This function tries to resolve the needed -\link ctfirfieldtypes CTF IR field type\endlink of the dynamic field -types that are found anywhere in the context or payload field -types of \p event_class and in the root field types of the -parent stream class of \p event_class. If any automatic resolving fails, -this function fails. This means that, if any dynamic field type need -a field type which should be found in the trace packet header root -field type, and if the parent stream class of \p event_class was not -added to a \link ctfirtraceclass CTF IR trace class\endlink yet -with bt_trace_add_stream_class(), then this function fails. - -@param[in] event_class CTF IR event class to use to create the - CTF IR event. -@returns Created event object, or \c NULL on error. - -@prenotnull{event_class} -@pre \p event_class has a parent stream class. -@postsuccessrefcountret1 -*/ -extern struct bt_event *bt_event_create( - struct bt_event_class *event_class); - -/** -@brief Returns the parent CTF IR event class of the CTF IR event - \p event. - -This function returns a reference to the event class which was used to -create the event object in the first place with bt_event_create(). - -@param[in] event Event of which to get the parent event class. -@returns Parent event class of \p event, - or \c NULL on error. - -@prenotnull{event} -@postrefcountsame{event} -@postsuccessrefcountretinc -*/ -extern struct bt_event_class *bt_event_get_class( - struct bt_event *event); - -/** -@brief Returns the CTF IR packet associated to the CTF IR event - \p event. +extern struct bt_event_class *bt_event_borrow_class(struct bt_event *event); -This function returns a reference to the event class which was set to -\p event in the first place with bt_event_set_packet(). +extern struct bt_packet *bt_event_borrow_packet(struct bt_event *event); -@param[in] event Event of which to get the associated packet. -@returns Packet associated to \p event, - or \c NULL if no packet is associated to - \p event or on error. +extern struct bt_stream *bt_event_borrow_stream(struct bt_event *event); -@prenotnull{event} -@postrefcountsame{event} -@postsuccessrefcountretinc +extern struct bt_field *bt_event_borrow_header_field(struct bt_event *event); -@sa bt_event_set_packet(): Associates a given event to a given - packet. -*/ -extern struct bt_packet *bt_event_get_packet( - struct bt_event *event); - -/** -@brief Associates the CTF IR event \p event to the CTF IR packet - \p packet. - -The \link ctfirstreamclass CTF IR stream class\endlink of the -parent \link ctfirstream CTF IR stream\endlink of \p packet \em must -be the same as the parent stream class of the -\link ctfireventclass CTF IR event class\endlink returned -by bt_event_get_class() for \p event. - -You \em must call this function to create an event-packet association -before you call bt_notification_event_create() with \p event. - -On success, this function also sets the parent stream object of -\p event to the parent stream of \p packet. - -@param[in] event Event to which to associate \p packet. -@param[in] packet Packet to associate to \p event. -@returns 0 on success, or a negative value on error. - -@prenotnull{event} -@prenotnull{packet} -@prehot{event} -@pre The parent stream class of \p packet is the same as the parent - stream class of \p event. -@postsuccessrefcountretinc - -@sa bt_event_get_packet(): Returns the associated packet of a - given event object. -*/ -extern int bt_event_set_packet(struct bt_event *event, - struct bt_packet *packet); +extern int bt_event_move_header(struct bt_event *event, + struct bt_event_header_field *header); -/** -@brief Returns the parent CTF IR stream associated to the CTF IR event - \p event. - -@param[in] event Event of which to get the parent stream. -@returns Parent stream of \p event, or \c NULL on error. - -@prenotnull{event} -@postrefcountsame{event} -@postsuccessrefcountretinc -*/ -extern struct bt_stream *bt_event_get_stream( +extern struct bt_field *bt_event_borrow_common_context_field( struct bt_event *event); -/** @} */ - -/** -@name Contained fields functions -@{ -*/ - -/** -@brief Returns the stream event header field of the CTF IR event - \p event. - -@param[in] event Event of which to get the stream event header - field. -@returns Stream event header field of \p event, - or \c NULL if the stream event header - field is not set or on error. - -@prenotnull{event} -@postrefcountsame{event} -@postsuccessrefcountretinc - -@sa bt_event_get_header(): Sets the stream event header - field of a given event. -*/ -extern struct bt_field *bt_event_get_header( +extern struct bt_field *bt_event_borrow_specific_context_field( struct bt_event *event); -/** -@brief Sets the stream event header field of the CTF IR event - \p event to \p header, or unsets the current stream event header field - from \p event. - -If \p header is not \c NULL, the field type of \p header, as returned by -bt_field_get_type(), \em must be equivalent to the field type returned by -bt_stream_class_get_event_header_type() for the parent stream class -of \p event. - -@param[in] event Event of which to set the stream event header - field. -@param[in] header Stream event header field. -@returns 0 on success, or a negative value on error. - -@prenotnull{event} -@prehot{event} -@pre \p header, if not \c NULL, has a field type equivalent to - the field type returned by bt_stream_class_get_event_header_type() - for the parent stream class of \p event. -@postrefcountsame{event} -@post On success, if \p header is not \c NULL, - the reference count of \p header is incremented. - -@sa bt_event_get_header(): Returns the stream event header field - of a given event. -*/ -extern int bt_event_set_header(struct bt_event *event, - struct bt_field *header); - -/** -@brief Returns the stream event context field of the CTF IR event - \p event. - -@param[in] event Event of which to get the stream event context - field. -@returns Stream event context field of \p event, - or \c NULL if the stream event context - field is not set or on error. - -@prenotnull{event} -@postrefcountsame{event} -@postsuccessrefcountretinc - -@sa bt_event_set_stream_event_context(): Sets the stream event context - field of a given event. -*/ -extern struct bt_field *bt_event_get_stream_event_context( - struct bt_event *event); - -/** -@brief Sets the stream event context field of the CTF IR event - \p event to \p context, or unsets the current stream event context field - from \p event. - -If \p context is not \c NULL, the field type of \p context, as returned by -bt_field_get_type(), \em must be equivalent to the field type returned by -bt_stream_class_get_event_context_type() for the parent stream class -of \p event. - -@param[in] event Event of which to set the stream event context field. -@param[in] context Stream event context field. -@returns 0 on success, or a negative value on error. - -@prenotnull{event} -@prehot{event} -@pre \p context, if not \c NULL, has a field type equivalent to - the field type returned by bt_stream_class_get_event_context_type() - for the parent stream class of \p event. -@postrefcountsame{event} -@post On success, if \p context is not \c NULL, the reference - count of \p context is incremented. - -@sa bt_event_get_stream_event_context(): Returns the stream event context - field of a given event. -*/ -extern int bt_event_set_stream_event_context(struct bt_event *event, - struct bt_field *context); - -/** -@brief Returns the event context field of the CTF IR event \p event. - -@param[in] event Event of which to get the context field. -@returns Event context field of \p event, or \c NULL if the - event context field is not set or on error. - -@prenotnull{event} -@postrefcountsame{event} -@postsuccessrefcountretinc - -@sa bt_event_set_event_context(): Sets the event context field of a given - event. -*/ -extern struct bt_field *bt_event_get_event_context( - struct bt_event *event); - -/** -@brief Sets the event context field of the CTF IR event \p event to \p context, - or unsets the current event context field from \p event. - -If \p context is not \c NULL, the field type of \p context, as returned by -bt_field_get_type(), \em must be equivalent to the field type returned by -bt_event_class_get_context_type() for the parent class of \p event. - -@param[in] event Event of which to set the context field. -@param[in] context Event context field. -@returns 0 on success, or a negative value on error. - -@prenotnull{event} -@prehot{event} -@pre \p context, if not \c NULL, has a field type equivalent to - the field type returned by bt_event_class_get_context_type() for the - parent class of \p event. -@postrefcountsame{event} -@post On success, if \p context is not \c NULL, the reference - count of \p context is incremented. - -@sa bt_event_get_context(): Returns the context field of a given event. -*/ -extern int bt_event_set_event_context(struct bt_event *event, - struct bt_field *context); - -/** -@brief Returns the payload field of the CTF IR event \p event. - -@param[in] event Event of which to get the payload field. -@returns Payload field of \p event, or \c NULL if the payload - field is not set or on error. - -@prenotnull{event} -@postrefcountsame{event} -@postsuccessrefcountretinc - -@sa bt_event_set_event_payload(): Sets the payload field of a given - event. -*/ -extern struct bt_field *bt_event_get_event_payload( - struct bt_event *event); - -/** -@brief Sets the payload field of the CTF IR event \p event to \p payload, - or unsets the current event payload field from \p event. - -If \p payload is not \c NULL, the field type of \p payload, as returned by -bt_field_get_type(), \em must be equivalent to the field type returned by -bt_event_class_get_payload_type() for the parent class of \p event. - -@param[in] event Event of which to set the payload field. -@param[in] payload Event payload field. -@returns 0 on success, or a negative value on error. - -@prenotnull{event} -@prehot{event} -@pre \p payload, if not \c NULL, has a field type equivalent to - the field typereturned by bt_event_class_get_payload_type() for the - parent class of \p event. -@postrefcountsame{event} -@post On success, if \p payload is not \c NULL, the reference - count of \p payload is incremented. - -@sa bt_event_get_payload(): Returns the payload field of a given event. -*/ -extern int bt_event_set_event_payload(struct bt_event *event, - struct bt_field *payload); - -/** @cond DOCUMENT */ - -/* - * TODO: Doxygenize. - * - * bt_event_get_payload: get an event's field. - * - * Returns the field matching "name". bt_put() must be called on the - * returned value. - * - * @param event Event instance. - * @param name Event field name, see notes. - * - * Returns a field instance on success, NULL on error. - * - * Note: Passing a name will cause the function to perform a look-up by - * name assuming the event's payload is a structure. This will return - * the raw payload instance if name is NULL. - */ -extern struct bt_field *bt_event_get_payload(struct bt_event *event, - const char *name); - -/* - * TODO: Doxygenize. - * - * bt_event_get_payload_by_index: Get event's field by index. - * - * Returns the field associated with the provided index. bt_put() - * must be called on the returned value. The indexes to be provided are - * the same as can be retrieved from the event class. - * - * @param event Event. - * @param index Index of field. - * - * Returns the event's field, NULL on error. - * - * Note: Will return an error if the payload's type is not a structure. - */ -extern struct bt_field *bt_event_get_payload_by_index( - struct bt_event *event, uint64_t index); - -/* - * TODO: Doxygenize. - * - * bt_event_set_payload: set an event's field. - * - * Set a manually allocated field as an event's payload. The event will share - * the field's ownership by using its reference count. - * bt_put() must be called on the returned value. - * - * @param event Event instance. - * @param name Event field name, see notes. - * @param value Instance of a field whose type corresponds to the event's field. - * - * Returns 0 on success, a negative value on error. - * - * Note: The function will return an error if a name is provided and the payload - * type is not a structure. If name is NULL, the payload field will be set - * directly and must match the event class' payload's type. - */ -extern int bt_event_set_payload(struct bt_event *event, - const char *name, - struct bt_field *value); - -/** @endcond */ - -/** @} */ - -/** -@name Clock value functions -@{ -*/ - -/** -@brief Returns the value, as of the CTF IR event \p event, of the - clock described by the - \link ctfirclockclass CTF IR clock class\endlink \p clock_class. - -@param[in] event Event of which to get the value of the clock - described by \p clock_class. -@param[in] clock_class Class of the clock of which to get the value. -@returns Value of the clock described by \p clock_class - as of \p event. - -@prenotnull{event} -@prenotnull{clock_class} -@postrefcountsame{event} -@postrefcountsame{clock_class} -@postsuccessrefcountretinc - -@sa bt_event_set_clock_value(): Sets the clock value of a given event. -*/ -extern struct bt_clock_value *bt_event_get_clock_value( - struct bt_event *event, - struct bt_clock_class *clock_class); - -/** -@brief Sets the value, as of the CTF IR event \p event, of the - clock described by its \link ctfirclockclass CTF IR - clock class\endlink. - -@param[in] event Event of which to set the value of the clock - described by the clock class of \p clock_value. -@param[in] clock_value Value of the clock described by its clock class - as of \p event. -@returns 0 on success, or a negative value on error. - -@prenotnull{event} -@prenotnull{clock_value} -@prehot{event} -@postrefcountsame{event} - -@sa bt_event_get_clock_value(): Returns the clock value of - a given event. -*/ -extern int bt_event_set_clock_value( - struct bt_event *event, - struct bt_clock_value *clock_value); - -/** @} */ +extern struct bt_field *bt_event_borrow_payload_field(struct bt_event *event); -/** @} */ +extern int bt_event_set_default_clock_value(struct bt_event *event, + uint64_t value_cycles); -/* Pre-2.0 CTF writer compatibility */ -#define bt_ctf_event bt_event -#define bt_ctf_event_create bt_event_create -#define bt_ctf_event_get_payload bt_event_get_payload -#define bt_ctf_event_set_payload bt_event_set_payload +extern enum bt_clock_value_status bt_event_borrow_default_clock_value( + struct bt_event *event, struct bt_clock_value **clock_value); #ifdef __cplusplus }