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Diffstat (limited to 'src/core/lib/statistics/census_tracing.h')
| -rw-r--r-- | src/core/lib/statistics/census_tracing.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/core/lib/statistics/census_tracing.h b/src/core/lib/statistics/census_tracing.h new file mode 100644 index 0000000000..a101abf3cb --- /dev/null +++ b/src/core/lib/statistics/census_tracing.h @@ -0,0 +1,96 @@ +/* + * + * Copyright 2015-2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef GRPC_CORE_LIB_STATISTICS_CENSUS_TRACING_H +#define GRPC_CORE_LIB_STATISTICS_CENSUS_TRACING_H + +#include <grpc/support/time.h> +#include "src/core/lib/statistics/census_rpc_stats.h" + +/* WARNING: The data structures and APIs provided by this file are for GRPC + library's internal use ONLY. They might be changed in backward-incompatible + ways and are not subject to any deprecation policy. + They are not recommended for external use. + */ +#ifdef __cplusplus +extern "C" { +#endif + +/* Struct for a trace annotation. */ +typedef struct census_trace_annotation { + gpr_timespec ts; /* timestamp of the annotation */ + char txt[CENSUS_MAX_ANNOTATION_LENGTH + 1]; /* actual txt annotation */ + struct census_trace_annotation *next; +} census_trace_annotation; + +typedef struct census_trace_obj { + census_op_id id; + gpr_timespec ts; + census_rpc_stats rpc_stats; + char *method; + census_trace_annotation *annotations; +} census_trace_obj; + +/* Deletes trace object. */ +void census_trace_obj_destroy(census_trace_obj *obj); + +/* Initializes trace store. This function is thread safe. */ +void census_tracing_init(void); + +/* Shutsdown trace store. This function is thread safe. */ +void census_tracing_shutdown(void); + +/* Gets trace obj corresponding to the input op_id. Returns NULL if trace store + is not initialized or trace obj is not found. Requires trace store being + locked before calling this function. */ +census_trace_obj *census_get_trace_obj_locked(census_op_id op_id); + +/* The following two functions acquire and release the trace store global lock. + They are for census internal use only. */ +void census_internal_lock_trace_store(void); +void census_internal_unlock_trace_store(void); + +/* Gets method name associated with the input trace object. */ +const char *census_get_trace_method_name(const census_trace_obj *trace); + +/* Returns an array of pointers to trace objects of currently active operations + and fills in number of active operations. Returns NULL if there are no active + operations. + Caller owns the returned objects. */ +census_trace_obj **census_get_active_ops(int *num_active_ops); + +#ifdef __cplusplus +} +#endif + +#endif /* GRPC_CORE_LIB_STATISTICS_CENSUS_TRACING_H */ |