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1 | /* This file is part of the Linux Trace Toolkit trace reading library |
2 | * Copyright (C) 2003-2004 Michel Dagenais |
3 | * |
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. |
7 | * |
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. |
12 | * |
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. |
17 | */ |
18 | |
19 | #ifndef EVENT_H |
20 | #define EVENT_H |
21 | |
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22 | #include <glib.h> |
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23 | #include <ltt/ltt.h> |
24 | |
25 | LttEvent *ltt_event_new(); |
26 | |
27 | void ltt_event_destroy(LttEvent *event); |
28 | |
29 | /* Events and their content, including the raw data, are only valid |
30 | until reading another event from the same tracefile. |
31 | Indeed, since event reading is critical to the performance, |
32 | the memory associated with an event may be reused at each read. */ |
33 | |
34 | /* Obtain the trace unique integer id associated with the type of |
35 | this event */ |
36 | |
37 | unsigned ltt_event_eventtype_id(LttEvent *e); |
38 | |
39 | |
40 | /* Facility and type for the event */ |
41 | |
42 | LttFacility *ltt_event_facility(LttEvent *e); |
43 | |
44 | LttEventType *ltt_event_eventtype(LttEvent *e); |
45 | |
46 | |
47 | /* Root field for the event */ |
48 | |
49 | LttField *ltt_event_field(LttEvent *e); |
50 | |
51 | |
52 | /* Time and cycle count for the event */ |
53 | |
54 | LttTime ltt_event_time(LttEvent *e); |
55 | |
56 | LttCycleCount ltt_event_cycle_count(LttEvent *e); |
57 | |
58 | |
59 | /* Obtain the position of the event within the tracefile. This |
60 | is used to seek back to this position later or to seek to another |
61 | position, computed relative to this position. The event position |
62 | structure is opaque and contains several fields, only two |
63 | of which are user accessible: block number and event index |
64 | within the block. */ |
65 | |
66 | void ltt_event_position(LttEvent *e, LttEventPosition *ep); |
67 | |
68 | LttEventPosition * ltt_event_position_new(); |
69 | |
70 | void ltt_event_position_get(LttEventPosition *ep, |
71 | unsigned *block_number, unsigned *index_in_block, LttTracefile ** tf); |
72 | |
73 | void ltt_event_position_set(LttEventPosition *ep, |
74 | unsigned block_number, unsigned index_in_block); |
75 | |
76 | gint ltt_event_position_compare(const LttEventPosition *ep1, |
77 | const LttEventPosition *ep2); |
78 | |
79 | gint ltt_event_event_position_compare(const LttEvent *event, |
80 | const LttEventPosition *ep); |
81 | |
82 | void ltt_event_position_copy(LttEventPosition *dest, |
83 | const LttEventPosition *src); |
84 | |
85 | /* CPU id of the event */ |
86 | |
87 | unsigned ltt_event_cpu_id(LttEvent *e); |
88 | |
89 | |
90 | /* Pointer to the raw data for the event. This should not be used directly |
91 | unless prepared to do all the architecture specific conversions. */ |
92 | |
93 | void *ltt_event_data(LttEvent *e); |
94 | |
95 | |
96 | /* The number of elements in a sequence field is specific to each event |
97 | instance. This function returns the number of elements for an array or |
98 | sequence field in an event. */ |
99 | |
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100 | guint64 ltt_event_field_element_number(LttEvent *e, LttField *f); |
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101 | |
102 | |
103 | /* Set the currently selected element for a sequence or array field. */ |
104 | |
105 | void ltt_event_field_element_select(LttEvent *e, LttField *f, unsigned i); |
106 | |
107 | |
108 | /* A union is like a structure except that only a single member at a time |
109 | is present depending on the specific event instance. This function tells |
110 | the active member for a union field in an event. */ |
111 | |
112 | unsigned ltt_event_field_union_member(LttEvent *e, LttField *f); |
113 | |
114 | |
115 | /* These functions extract data from an event after architecture specific |
116 | conversions. */ |
117 | |
118 | guint32 ltt_event_get_unsigned(LttEvent *e, LttField *f); |
119 | |
120 | gint32 ltt_event_get_int(LttEvent *e, LttField *f); |
121 | |
122 | guint64 ltt_event_get_long_unsigned(LttEvent *e, LttField *f); |
123 | |
124 | gint64 ltt_event_get_long_int(LttEvent *e, LttField *f); |
125 | |
126 | float ltt_event_get_float(LttEvent *e, LttField *f); |
127 | |
128 | double ltt_event_get_double(LttEvent *e, LttField *f); |
129 | |
130 | |
131 | /* The string obtained is only valid until the next read from |
132 | the same tracefile. */ |
133 | |
134 | gchar *ltt_event_get_string(LttEvent *e, LttField *f); |
135 | |
136 | #endif // EVENT_H |