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1 | #ifndef _LTT_MARKERS_H |
2 | #define _LTT_MARKERS_H |
3 | |
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4 | /* |
5 | * Marker support header. |
6 | * |
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7 | * Mathieu Desnoyers, August 2007 |
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8 | * License: LGPL. |
9 | */ |
10 | |
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11 | #include <glib.h> |
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12 | #include <ltt/trace.h> |
13 | #include <ltt/compiler.h> |
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14 | #include <ltt/marker-field.h> |
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15 | #include <ltt/trace.h> |
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16 | |
17 | #define LTT_ATTRIBUTE_COMPACT (1<<0) |
18 | #define LTT_ATTRIBUTE_NETWORK_BYTE_ORDER (1<<1) |
19 | |
20 | /* static ids 0-7 reserved for internal use. */ |
21 | #define MARKER_CORE_IDS 8 |
22 | /* dynamic ids 8-127 reserved for compact events. */ |
23 | #define MARKER_COMPACT_IDS 128 |
24 | |
25 | struct marker_info; |
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26 | |
27 | struct marker_info { |
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28 | GQuark name; |
29 | char *format; |
30 | long size; /* size if known statically, else -1 */ |
31 | GArray *fields; /* Array of struct marker_field */ |
32 | guint8 int_size, long_size, pointer_size, size_t_size, alignment; |
33 | struct marker_info *next; /* Linked list of markers with the same name */ |
34 | }; |
35 | |
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36 | enum marker_id { |
37 | MARKER_ID_SET_MARKER_ID = 0, /* Static IDs available (range 0-7) */ |
38 | MARKER_ID_SET_MARKER_FORMAT, |
39 | MARKER_ID_HEARTBEAT_32, |
40 | MARKER_ID_HEARTBEAT_64, |
41 | MARKER_ID_COMPACT, /* Compact IDs (range: 8-127) */ |
42 | MARKER_ID_DYNAMIC, /* Dynamic IDs (range: 128-65535) */ |
43 | }; |
44 | |
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45 | static inline guint16 marker_get_id_from_info(LttTrace *trace, |
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46 | struct marker_info *info) |
47 | { |
48 | return ((unsigned long)info - (unsigned long)trace->markers->data) |
49 | / sizeof(struct marker_info); |
50 | } |
51 | |
52 | static inline struct marker_info *marker_get_info_from_id(LttTrace *trace, |
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53 | guint16 id) |
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54 | { |
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55 | if (unlikely(trace->markers->len <= id)) |
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56 | return NULL; |
57 | return &g_array_index(trace->markers, struct marker_info, id); |
58 | } |
59 | |
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60 | /* |
61 | * Returns the head of the marker info list for that name. |
62 | */ |
63 | static inline struct marker_info *marker_get_info_from_name(LttTrace *trace, |
64 | GQuark name) |
65 | { |
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66 | gpointer orig_key, value; |
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67 | int res; |
68 | |
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69 | res = g_hash_table_lookup_extended(trace->markers_hash, |
70 | (gconstpointer)(gulong)name, &orig_key, &value); |
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71 | if (!res) |
72 | return NULL; |
73 | return marker_get_info_from_id(trace, (guint16)(gulong)value); |
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74 | } |
75 | |
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76 | static inline char *marker_get_format_from_name(LttTrace *trace, |
77 | GQuark name) |
78 | { |
79 | gpointer orig_key, value; |
80 | int res; |
81 | |
82 | res = g_hash_table_lookup_extended(trace->markers_format_hash, |
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83 | (gconstpointer)(gulong)name, &orig_key, &value); |
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84 | if (!res) |
85 | return NULL; |
86 | return (char *)value; |
87 | } |
88 | |
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89 | static inline struct marker_field *marker_get_field(struct marker_info *info, |
90 | guint i) |
91 | { |
92 | return &g_array_index(info->fields, struct marker_field, i); |
93 | } |
94 | |
95 | static inline unsigned int marker_get_num_fields(struct marker_info *info) |
96 | { |
97 | return info->fields->len; |
98 | } |
99 | |
100 | /* |
101 | * for_each_marker_field - iterate over fields of a marker |
102 | * @field: struct marker_field * to use as iterator |
103 | * @info: marker info pointer |
104 | */ |
105 | #define for_each_marker_field(field, info) \ |
106 | for (field = marker_get_field(info, 0); \ |
107 | field != marker_get_field(info, marker_get_num_fields(info)); \ |
108 | field++) |
109 | |
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110 | int marker_format_event(LttTrace *trace, GQuark name, const char *format); |
111 | int marker_id_event(LttTrace *trace, GQuark name, guint16 id, |
112 | uint8_t int_size, uint8_t long_size, uint8_t pointer_size, |
113 | uint8_t size_t_size, uint8_t alignment); |
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114 | int allocate_marker_data(LttTrace *trace); |
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115 | void destroy_marker_data(LttTrace *trace); |
116 | |
117 | #endif //_LTT_MARKERS_H |