Span context interface. More...
#include <opentracing-c/span.h>
Inheritance diagram for opentracing_span_context:
Collaboration diagram for opentracing_span_context:
Data Fields | |
| opentracing_destructible | base |
| Base class member. More... | |
| void(* | foreach_baggage_item )(struct opentracing_span_context *span_context, opentracing_bool(*f)(void *arg, const char *key, const char *value), void *arg) |
| Calls a function for each baggage item in the span context. More... | |
| const void * | type_descriptor |
| Unique data used to identify tracing vendor span type. More... | |
| unsigned int | type_descriptor_length |
| Number of bytes the type descriptor occupies in memory. | |
 Data Fields inherited from opentracing_destructible | |
| void(* | destroy )(struct opentracing_destructible *destructible) OPENTRACINGC_NONNULL_ALL |
| Destructor to clean up any resources allocated to the instance. More... | |
Detailed Description
Span context interface.
Span context represents span state that must be propagated to descendant spans and across boundaries (e.g. trace I:D, span ID, baggage).
Field Documentation
◆ base
| opentracing_destructible opentracing_span_context::base |
Base class member.
◆ foreach_baggage_item
| void(* opentracing_span_context::foreach_baggage_item) (struct opentracing_span_context *span_context, opentracing_bool(*f)(void *arg, const char *key, const char *value), void *arg) |
Calls a function for each baggage item in the span context.
If the function returns opentracing_false, it will not be called again, and foreach_baggage_item will return immediately.
- Parameters
-
span_context Span context instance. f Callback function. Takes a user-defined argument, the baggage key, and the baggage value. arg Argument to pass to callback function.
◆ type_descriptor
| const void* opentracing_span_context::type_descriptor |
Unique data used to identify tracing vendor span type.
Necessary for tracer to cast span to vendor's type during extract().
- See also
- extract()
Below is a sample of a potential tracer creating a new span with a unique type descriptor.
static const char* custom_span_context_identifier = "example_vendor";
typedef struct custom_span_context {
...
} custom_span_context;
custom_span_context ctx;
((opentracing_span_context*) &ctx)->type_descriptor =
custom_span_context_identifier;
((opentracing_span_context*) &ctx)->type_descriptor_length =
strlen(custom_span_context_identifier) + 1;
The documentation for this struct was generated from the following file:
- opentracing-c/span.h
