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#ifndef NETDATA_BACKENDS_H
#define NETDATA_BACKENDS_H 1
#define BACKEND_SOURCE_DATA_AS_COLLECTED 0x00000001
#define BACKEND_SOURCE_DATA_AVERAGE 0x00000002
#define BACKEND_SOURCE_DATA_SUM 0x00000004
#define BACKEND_SOURCE_BITS (BACKEND_SOURCE_DATA_AS_COLLECTED|BACKEND_SOURCE_DATA_AVERAGE|BACKEND_SOURCE_DATA_SUM)
extern int backend_send_names;
extern int backend_update_every;
extern uint32_t backend_options;
extern const char *backend_prefix;
extern void *backends_main(void *ptr);
extern int backends_can_send_rrdset(uint32_t options, RRDSET *st);
extern uint32_t backend_parse_data_source(const char *source, uint32_t mode);
extern calculated_number backend_calculate_value_from_stored_data(
RRDSET *st // the chart
, RRDDIM *rd // the dimension
, time_t after // the start timestamp
, time_t before // the end timestamp
, uint32_t options // BACKEND_SOURCE_* bitmap
, time_t *first_timestamp // the timestamp of the first point used in this response
, time_t *last_timestamp // the timestamp that should be reported to backend
);
#endif /* NETDATA_BACKENDS_H */
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