X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=include%2Fbabeltrace%2Fctf%2Fevents.h;h=461cf06ccdd9c63040e45719f1a48b88154e6f29;hp=eb644125c69a9875b0875c9f60aa7fecd5ad5824;hb=c22b9327cbc4e6d9053f998952ea71c3227b8e36;hpb=9843982dca5a80c001fc5989a9ce5a2283b0740f diff --git a/include/babeltrace/ctf/events.h b/include/babeltrace/ctf/events.h index eb644125..461cf06c 100644 --- a/include/babeltrace/ctf/events.h +++ b/include/babeltrace/ctf/events.h @@ -24,10 +24,18 @@ */ #include +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif -struct ctf_stream; -struct ctf_stream_event; struct definition; +struct declaration; +struct bt_ctf_event; +struct bt_ctf_event_decl; +struct bt_ctf_field_decl; /* * the top-level scopes in CTF @@ -59,11 +67,13 @@ enum ctf_type_id { }; /* - * the structure to manipulate events + * the supported CTF string encodings */ -struct bt_ctf_event { - struct ctf_stream *stream; - struct ctf_stream_event *event; +enum ctf_string_encoding { + CTF_STRING_NONE = 0, + CTF_STRING_UTF8, + CTF_STRING_ASCII, + CTF_STRING_UNKNOWN, }; /* @@ -76,42 +86,59 @@ struct bt_ctf_event { * between the enum and the actual definition of top-level scopes. * On error return NULL. */ -struct definition *bt_ctf_get_top_level_scope(struct bt_ctf_event *event, +const struct definition *bt_ctf_get_top_level_scope(const struct bt_ctf_event *event, enum bt_ctf_scope scope); /* * bt_ctf_event_get_name: returns the name of the event or NULL on error */ -const char *bt_ctf_event_name(struct bt_ctf_event *event); +const char *bt_ctf_event_name(const struct bt_ctf_event *event); + +/* + * bt_ctf_get_cycles: returns the timestamp of the event as written + * in the packet (in cycles) or -1ULL on error. + */ +uint64_t bt_ctf_get_cycles(const struct bt_ctf_event *event); /* - * bt_ctf_get_timestamp: returns the timestamp of the event or -1ULL on error + * bt_ctf_get_timestamp: returns the timestamp of the event offsetted + * with the system clock source (in ns) or -1ULL on error */ -uint64_t bt_ctf_get_timestamp(struct bt_ctf_event *event); +uint64_t bt_ctf_get_timestamp(const struct bt_ctf_event *event); /* - * bt_ctf_get_field_list: returns an array of *def pointing to each field of - * the event. The array is NULL terminated. - * On error : return NULL. + * bt_ctf_get_field_list: obtain the list of fields for compound type + * + * This function can be used to obtain the list of fields + * contained within a compound type: array, sequence, + * structure, or variant. + + * This function sets the "list" pointer to an array of definition + * pointers and set count to the number of elements in the array. + * Return 0 on success and a negative value on error. + * + * The content pointed to by "list" should *not* be freed. It stays + * valid as long as the event is unchanged (as long as the iterator + * from which the event is extracted is unchanged). */ -int bt_ctf_get_field_list(struct bt_ctf_event *event, - struct definition *scope, +int bt_ctf_get_field_list(const struct bt_ctf_event *event, + const struct definition *scope, struct definition const * const **list, unsigned int *count); /* * bt_ctf_get_field: returns the definition of a specific field */ -struct definition *bt_ctf_get_field(struct bt_ctf_event *event, - struct definition *scope, +const struct definition *bt_ctf_get_field(const struct bt_ctf_event *event, + const struct definition *scope, const char *field); /* * bt_ctf_get_index: if the field is an array or a sequence, return the element * at position index, otherwise return NULL; */ -struct definition *bt_ctf_get_index(struct bt_ctf_event *event, - struct definition *field, +const struct definition *bt_ctf_get_index(const struct bt_ctf_event *event, + const struct definition *field, unsigned int index); /* @@ -119,10 +146,62 @@ struct definition *bt_ctf_get_index(struct bt_ctf_event *event, */ const char *bt_ctf_field_name(const struct definition *def); +/* + * bt_ctf_get_decl_from_def: return the declaration of a field from + * its definition or NULL on error + */ +const struct declaration *bt_ctf_get_decl_from_def(const struct definition *def); + +/* + * bt_ctf_get_decl_from_field_decl: return the declaration of a field from + * a field_decl or NULL on error + */ +const struct declaration *bt_ctf_get_decl_from_field_decl( + const struct bt_ctf_field_decl *field); + /* * bt_ctf_field_type: returns the type of a field or -1 if unknown */ -enum ctf_type_id bt_ctf_field_type(struct definition *def); +enum ctf_type_id bt_ctf_field_type(const struct declaration *decl); + +/* + * bt_ctf_get_int_signedness: return the signedness of an integer + * + * return 0 if unsigned + * return 1 if signed + * return -1 on error + */ +int bt_ctf_get_int_signedness(const struct declaration *decl); + +/* + * bt_ctf_get_int_base: return the base of an int or a negative value on error + */ +int bt_ctf_get_int_base(const struct declaration *decl); + +/* + * bt_ctf_get_int_byte_order: return the byte order of an int or a negative + * value on error + */ +int bt_ctf_get_int_byte_order(const struct declaration *decl); + +/* + * bt_ctf_get_int_len: return the size, in bits, of an int or a negative + * value on error + */ +ssize_t bt_ctf_get_int_len(const struct declaration *decl); + +/* + * bt_ctf_get_encoding: return the encoding of an int, a string, or of + * the integer contained in a char array or a sequence. + * return a negative value on error + */ +enum ctf_string_encoding bt_ctf_get_encoding(const struct declaration *decl); + +/* + * bt_ctf_get_array_len: return the len of an array or a negative + * value on error + */ +int bt_ctf_get_array_len(const struct declaration *decl); /* * Field access functions @@ -132,18 +211,59 @@ enum ctf_type_id bt_ctf_field_type(struct definition *def); * * If the field does not exist or is not of the type requested, the value * returned is undefined. To check if an error occured, use the - * bt_ctf_field_error() function after accessing a field. + * bt_ctf_field_get_error() function after accessing a field. + * + * bt_ctf_get_enum_int gets the integer field of an enumeration. + * bt_ctf_get_enum_str gets the string matching the current enumeration + * value, or NULL if the current value does not match any string. */ -uint64_t bt_ctf_get_uint64(struct definition *field); -int64_t bt_ctf_get_int64(struct definition *field); -char *bt_ctf_get_char_array(struct definition *field); -char *bt_ctf_get_string(struct definition *field); +uint64_t bt_ctf_get_uint64(const struct definition *field); +int64_t bt_ctf_get_int64(const struct definition *field); +const struct definition *bt_ctf_get_enum_int(const struct definition *field); +const char *bt_ctf_get_enum_str(const struct definition *field); +char *bt_ctf_get_char_array(const struct definition *field); +char *bt_ctf_get_string(const struct definition *field); /* - * bt_ctf_field_error: returns the last error code encountered while + * bt_ctf_field_get_error: returns the last error code encountered while * accessing a field and reset the error flag. * Return 0 if no error, a negative value otherwise. */ int bt_ctf_field_get_error(void); +/* + * bt_ctf_get_event_decl_list: set list pointer to an array of bt_ctf_event_decl + * pointers and set count to the number of elements in the array. + * + * Return 0 on success and a negative value on error. + */ +int bt_ctf_get_event_decl_list(int handle_id, struct bt_context *ctx, + struct bt_ctf_event_decl * const **list, + unsigned int *count); + +/* + * bt_ctf_get_decl_event_name: return the name of the event or NULL on error + */ +const char *bt_ctf_get_decl_event_name(const struct bt_ctf_event_decl *event); + +/* + * bt_ctf_get_decl_fields: set list pointer to an array of bt_ctf_field_decl + * pointers and set count to the number of elements in the array. + * + * Returns 0 on success and a negative value on error + */ +int bt_ctf_get_decl_fields(struct bt_ctf_event_decl *event_decl, + enum bt_ctf_scope scope, + struct bt_ctf_field_decl const * const **list, + unsigned int *count); + +/* + * bt_ctf_get_decl_field_name: return the name of a field decl or NULL on error + */ +const char *bt_ctf_get_decl_field_name(const struct bt_ctf_field_decl *field); + +#ifdef __cplusplus +} +#endif + #endif /* _BABELTRACE_CTF_EVENTS_H */