propagation.h

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#ifndef OPENTRACINGC_PROPAGATION_H
#define OPENTRACINGC_PROPAGATION_H

#include <opentracing-c/config.h>

#include <opentracing-c/common.h>
#include <opentracing-c/span.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

typedef enum opentracing_propagation_error_code {
    opentracing_propagation_error_code_success = 0,

    opentracing_propagation_error_code_span_context_not_found = -2,

    opentracing_propagation_error_code_invalid_span_context = -3,

    opentracing_propagation_error_code_invalid_carrier = -4,

    opentracing_propagation_error_code_span_context_corrupted = -5,

    opentracing_propagation_error_code_unknown = -6
} opentracing_propagation_error_code;

typedef struct opentracing_text_map_writer {
    opentracing_destructible base;

    opentracing_propagation_error_code (*set)(
        struct opentracing_text_map_writer* writer,
        const char* key,
        const char* value) OPENTRACINGC_NONNULL(1);
} opentracing_text_map_writer;

typedef struct opentracing_text_map_reader {
    opentracing_destructible base;

    opentracing_propagation_error_code (*foreach_key)(
        struct opentracing_text_map_reader* reader,
        opentracing_propagation_error_code (*handler)(void* arg,
                                                      const char* key,
                                                      const char* value),
        void* arg) OPENTRACINGC_NONNULL(1, 2);
} opentracing_text_map_reader;

typedef struct opentracing_http_headers_writer {
    opentracing_text_map_writer base;
} opentracing_http_headers_writer;

typedef struct opentracing_http_headers_reader {
    opentracing_text_map_reader base;
} opentracing_http_headers_reader;

/* Forward declaration. */
struct opentracing_tracer;

typedef struct opentracing_custom_carrier_reader {
    opentracing_destructible base;

    opentracing_propagation_error_code (*extract)(
        struct opentracing_custom_carrier_reader* reader,
        const struct opentracing_tracer* tracer,
        opentracing_span_context** span_context) OPENTRACINGC_NONNULL_ALL;
} opentracing_custom_carrier_reader;

typedef struct opentracing_custom_carrier_writer {
    opentracing_destructible base;

    opentracing_propagation_error_code (*inject)(
        struct opentracing_custom_carrier_writer* writer,
        const struct opentracing_tracer* tracer,
        const opentracing_span_context* span_context) OPENTRACINGC_NONNULL_ALL;
} opentracing_custom_carrier_writer;

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* OPENTRACINGC_PROPAGATION_H */