1 /* This file is part of the Linux Trace Toolkit trace reading library
2 * Copyright (C) 2003-2004 Michel Dagenais
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License Version 2.1 as published by the Free Software Foundation.
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 02111-1307, USA.
24 #include <sys/types.h>
26 LttEvent
*ltt_event_new();
28 void ltt_event_destroy(LttEvent
*event
);
30 /* Events and their content, including the raw data, are only valid
31 until reading another event from the same tracefile.
32 Indeed, since event reading is critical to the performance,
33 the memory associated with an event may be reused at each read. */
35 /* Obtain the trace unique integer id associated with the type of
38 unsigned ltt_event_eventtype_id(const LttEvent
*e
);
40 unsigned ltt_event_facility_id(const LttEvent
*e
);
42 /* Facility and type for the event */
44 LttFacility
*ltt_event_facility(const LttEvent
*e
);
46 LttEventType
*ltt_event_eventtype(const LttEvent
*e
);
49 /* Root field for the event */
51 LttField
*ltt_event_field(LttEvent
*e
);
54 /* Time and cycle count for the event */
56 LttTime
ltt_event_time(const LttEvent
*e
);
58 LttCycleCount
ltt_event_cycle_count(const LttEvent
*e
);
61 /* Obtain the position of the event within the tracefile. This
62 is used to seek back to this position later or to seek to another
63 position, computed relative to this position. The event position
64 structure is opaque and contains several fields, only two
65 of which are user accessible: block number and event index
68 void ltt_event_position(LttEvent
*e
, LttEventPosition
*ep
);
70 LttEventPosition
* ltt_event_position_new();
72 void ltt_event_position_get(LttEventPosition
*ep
, LttTracefile
**tf
,
73 guint
*block
, guint
*offset
, guint64
*tsc
);
75 gint
ltt_event_position_compare(const LttEventPosition
*ep1
,
76 const LttEventPosition
*ep2
);
78 void ltt_event_position_copy(LttEventPosition
*dest
,
79 const LttEventPosition
*src
);
81 LttTracefile
*ltt_event_position_tracefile(LttEventPosition
*ep
);
83 /* CPU id of the event */
85 unsigned ltt_event_cpu_id(LttEvent
*e
);
88 /* Pointer to the raw data for the event. This should not be used directly
89 unless prepared to do all the architecture specific conversions. */
91 void *ltt_event_data(LttEvent
*e
);
94 /* The number of elements in a sequence field is specific to each event
95 instance. This function returns the number of elements for an array or
96 sequence field in an event. */
98 guint64
ltt_event_field_element_number(LttEvent
*e
, LttField
*f
);
101 /* Set the currently selected element for a sequence or array field. */
103 void ltt_event_field_element_select(LttEvent
*e
, LttField
*f
, unsigned i
);
106 /* A union is like a structure except that only a single member at a time
107 is present depending on the specific event instance. This function tells
108 the active member for a union field in an event. */
110 unsigned ltt_event_field_union_member(LttEvent
*e
, LttField
*f
);
113 /* These functions extract data from an event after architecture specific
116 guint32
ltt_event_get_unsigned(LttEvent
*e
, LttField
*f
);
118 gint32
ltt_event_get_int(LttEvent
*e
, LttField
*f
);
120 guint64
ltt_event_get_long_unsigned(LttEvent
*e
, LttField
*f
);
122 gint64
ltt_event_get_long_int(LttEvent
*e
, LttField
*f
);
124 float ltt_event_get_float(LttEvent
*e
, LttField
*f
);
126 double ltt_event_get_double(LttEvent
*e
, LttField
*f
);
129 /* The string obtained is only valid until the next read from
130 the same tracefile. */
132 gchar
*ltt_event_get_string(LttEvent
*e
, LttField
*f
);
134 size_t get_field_type_size(LttTracefile
*tf
,
135 LttEventType
*event_type
,
136 off_t offset_root
, off_t offset_parent
,
137 LttField
*field
, void *data
);
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