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1 | #ifndef _LTT_EVENT_H |
| 2 | #define _LTT_EVENT_H |
| 3 | |
| 4 | #include <glib.h> |
| 5 | #include <stdint.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <endian.h> |
| 8 | #include <ltt/ltt.h> |
| 9 | #include <ltt/time.h> |
| 10 | |
| 11 | struct marker_field; |
| 12 | |
| 13 | /* |
| 14 | * Structure LttEvent and LttEventPosition must begin with the _exact_ same |
| 15 | * fields in the exact same order. LttEventPosition is a parent of LttEvent. |
| 16 | */ |
| 17 | struct LttEvent { |
| 18 | /* Begin of LttEventPosition fields */ |
| 19 | LttTracefile *tracefile; |
| 20 | unsigned int block; |
| 21 | unsigned int offset; |
| 22 | |
| 23 | /* Timekeeping */ |
| 24 | uint64_t tsc; /* Current timestamp counter */ |
| 25 | |
| 26 | /* End of LttEventPosition fields */ |
| 27 | guint32 timestamp; /* truncated timestamp */ |
| 28 | |
| 29 | guint16 event_id; |
| 30 | |
| 31 | LttTime event_time; |
| 32 | |
| 33 | void *data; /* event data */ |
| 34 | guint data_size; |
| 35 | guint event_size; /* event_size field of the header : |
| 36 | used to verify data_size from marker. */ |
| 37 | int count; /* the number of overflow of cycle count */ |
| 38 | gint64 overflow_nsec; /* precalculated nsec for overflows */ |
| 39 | }; |
| 40 | |
| 41 | struct LttEventPosition { |
| 42 | LttTracefile *tracefile; |
| 43 | unsigned int block; |
| 44 | unsigned int offset; |
| 45 | |
| 46 | /* Timekeeping */ |
| 47 | uint64_t tsc; /* Current timestamp counter */ |
| 48 | }; |
| 49 | |
| 50 | static inline guint16 ltt_event_id(struct LttEvent *event) |
| 51 | { |
| 52 | return event->event_id; |
| 53 | } |
| 54 | |
| 55 | static inline LttTime ltt_event_time(struct LttEvent *event) |
| 56 | { |
| 57 | return event->event_time; |
| 58 | } |
| 59 | |
| 60 | /* Obtain the position of the event within the tracefile. This |
| 61 | is used to seek back to this position later or to seek to another |
| 62 | position, computed relative to this position. The event position |
| 63 | structure is opaque and contains several fields, only two |
| 64 | of which are user accessible: block number and event index |
| 65 | within the block. */ |
| 66 | |
| 67 | void ltt_event_position(LttEvent *e, LttEventPosition *ep); |
| 68 | |
| 69 | LttEventPosition * ltt_event_position_new(); |
| 70 | |
| 71 | void ltt_event_position_get(LttEventPosition *ep, LttTracefile **tf, |
| 72 | guint *block, guint *offset, guint64 *tsc); |
| 73 | |
| 74 | void ltt_event_position_set(LttEventPosition *ep, LttTracefile *tf, |
| 75 | guint block, guint offset, guint64 tsc); |
| 76 | |
| 77 | gint ltt_event_position_compare(const LttEventPosition *ep1, |
| 78 | const LttEventPosition *ep2); |
| 79 | |
| 80 | void ltt_event_position_copy(LttEventPosition *dest, |
| 81 | const LttEventPosition *src); |
| 82 | |
| 83 | LttTracefile *ltt_event_position_tracefile(LttEventPosition *ep); |
| 84 | |
| 85 | /* These functions extract data from an event after architecture specific |
| 86 | * conversions. */ |
| 87 | |
| 88 | guint32 ltt_event_get_unsigned(LttEvent *e, struct marker_field *f); |
| 89 | |
| 90 | gint32 ltt_event_get_int(LttEvent *e, struct marker_field *f); |
| 91 | |
| 92 | guint64 ltt_event_get_long_unsigned(LttEvent *e, struct marker_field *f); |
| 93 | |
| 94 | gint64 ltt_event_get_long_int(LttEvent *e, struct marker_field *f); |
| 95 | |
| 96 | float ltt_event_get_float(LttEvent *e, struct marker_field *f); |
| 97 | |
| 98 | double ltt_event_get_double(LttEvent *e, struct marker_field *f); |
| 99 | |
| 100 | |
| 101 | /* The string obtained is only valid until the next read from |
| 102 | * the same tracefile. */ |
| 103 | |
| 104 | gchar *ltt_event_get_string(LttEvent *e, struct marker_field *f); |
| 105 | |
| 106 | static inline LttCycleCount ltt_event_cycle_count(const LttEvent *e) |
| 107 | { |
| 108 | return e->tsc; |
| 109 | } |
| 110 | |
| 111 | #endif //_LTT_EVENT_H |
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