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Diffstat (limited to '')
| -rw-r--r-- | src/tracer.cpp | 874 |
1 files changed, 874 insertions, 0 deletions
diff --git a/src/tracer.cpp b/src/tracer.cpp new file mode 100644 index 0000000..80f56b0 --- /dev/null +++ b/src/tracer.cpp @@ -0,0 +1,874 @@ +/*** + * Copyright 2020 HAProxy Technologies + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "include.h" + + +static std::unique_ptr<const opentracing::DynamicTracingLibraryHandle> ot_dynlib = nullptr; +static std::shared_ptr<opentracing::Tracer> ot_tracer = nullptr; + + +/*** + * NAME + * ot_tracer_load - + * + * ARGUMENTS + * library - + * errbuf - + * errbufsiz - + * handle - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int ot_tracer_load(const char *library, char *errbuf, int errbufsiz, opentracing::DynamicTracingLibraryHandle &handle) +{ + std::string errmsg; + + /* Load the tracer library. */ + auto handle_maybe = opentracing::DynamicallyLoadTracingLibrary(library, errmsg); + if (!handle_maybe) { + (void)snprintf(errbuf, errbufsiz, "Failed to load tracing library: %s", errmsg.empty() ? handle_maybe.error().message().c_str() : errmsg.c_str()); + + return -1; + } + + handle = std::move(*handle_maybe); + + return 0; +} + + +/*** + * NAME + * ot_tracer_start - + * + * ARGUMENTS + * config - + * errbuf - + * errbufsiz - + * tracer - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int ot_tracer_start(const char *config, char *errbuf, int errbufsiz, std::shared_ptr<opentracing::Tracer> &tracer) +{ + std::string errmsg; + + auto &tracer_factory = ot_dynlib->tracer_factory(); + + /* Create a tracer with the requested configuration. */ + auto tracer_maybe = tracer_factory.MakeTracer(config, errmsg); + if (!tracer_maybe) { + (void)snprintf(errbuf, errbufsiz, "Failed to construct tracer: %s", errmsg.empty() ? tracer_maybe.error().message().c_str() : errmsg.c_str()); + + return -1; + } + + tracer = std::move(*tracer_maybe); + + return 0; +} + + +/*** + * NAME + * ot_tracer_close - + * + * ARGUMENTS + * tracer - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * This function does not return a value. + */ +static void ot_tracer_close(struct otc_tracer *tracer) +{ + if (tracer == nullptr) + return; + + if (ot_dynlib == nullptr) + return; + + if (ot_tracer != nullptr) + ot_tracer->Close(); + tracer->destroy(&tracer); +} + + +/*** + * NAME + * ot_tracer_start_span_with_options - + * + * ARGUMENTS + * tracer - NOT USED + * operation_name - + * options - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static struct otc_span *ot_tracer_start_span_with_options(struct otc_tracer *tracer, const char *operation_name, const struct otc_start_span_options *options) +{ + OT_LOCK_GUARD(span); + std::unique_ptr<opentracing::Span> span_maybe = nullptr; + struct otc_span *retptr = nullptr; + + if (ot_tracer == nullptr) + return retptr; + else if ((tracer == nullptr) || (operation_name == nullptr)) + return retptr; + + /* Allocating memory for the span. */ + if ((retptr = ot_span_new()) == nullptr) + return retptr; + + if (options == nullptr) { + span_maybe = ot_tracer->StartSpan(operation_name); + } else { + struct opentracing::StartSpanOptions span_options; + + if (options->start_time_steady.value.tv_sec > 0) { + auto dt = timespec_to_duration(&(options->start_time_steady.value)); + + span_options.start_steady_timestamp = std::chrono::time_point<std::chrono::steady_clock>(dt); + } + + if (options->start_time_system.value.tv_sec > 0) { +#ifdef __clang__ + auto dt = timespec_to_duration_us(&(options->start_time_system.value)); +#else + auto dt = timespec_to_duration(&(options->start_time_system.value)); +#endif + + span_options.start_system_timestamp = std::chrono::time_point<std::chrono::system_clock>(dt); + } + + if (options->references != nullptr) { + int lock_cnt = 0; + + for (int i = 0; i < options->num_references; i++) { + const opentracing::SpanContext *context = nullptr; + + if (OT_SPAN_IS_VALID(options->references[i].referenced_context->span)) { + context = &(ot_span_handle.at(options->references[i].referenced_context->span->idx)->context()); + } + else if (OT_CTX_KEY_IS_VALID(options->references[i].referenced_context)) { +#ifdef OT_THREADS_NO_LOCKING + lock_cnt++; +#else + if (lock_cnt++ == 0) + ot_span_context.mutex.lock(); +#endif + + context = ot_span_context_handle.at(options->references[i].referenced_context->idx).get(); + } + + if (options->references[i].type == otc_span_reference_child_of) + span_options.references.push_back(std::make_pair(opentracing::SpanReferenceType::ChildOfRef, context)); + else if (options->references[i].type == otc_span_reference_follows_from) + span_options.references.push_back(std::make_pair(opentracing::SpanReferenceType::FollowsFromRef, context)); + } + +#ifndef OT_THREADS_NO_LOCKING + if (lock_cnt > 0) + ot_span_context.mutex.unlock(); +#endif + } + + if (options->tags != nullptr) { + for (int i = 0; i < options->num_tags; i++) + if (options->tags[i].value.type == otc_value_bool) { + span_options.tags.push_back(std::make_pair(options->tags[i].key, options->tags[i].value.value.bool_value)); + } + else if (options->tags[i].value.type == otc_value_double) { + span_options.tags.push_back(std::make_pair(options->tags[i].key, options->tags[i].value.value.double_value)); + } + else if (options->tags[i].value.type == otc_value_int64) { + span_options.tags.push_back(std::make_pair(options->tags[i].key, options->tags[i].value.value.int64_value)); + } + else if (options->tags[i].value.type == otc_value_uint64) { + span_options.tags.push_back(std::make_pair(options->tags[i].key, options->tags[i].value.value.uint64_value)); + } + else if (options->tags[i].value.type == otc_value_string) { + std::string str_value = options->tags[i].value.value.string_value; + + span_options.tags.push_back(std::make_pair(options->tags[i].key, str_value)); + } + else if (options->tags[i].value.type == otc_value_null) { + span_options.tags.push_back(std::make_pair(options->tags[i].key, nullptr)); + } + } + + span_maybe = ot_tracer->StartSpanWithOptions(operation_name, span_options); + } + + if (span_maybe != nullptr) + ot_span_handle.emplace(retptr->idx, std::move(span_maybe)); + else + ot_nolock_span_destroy(&retptr); + + return retptr; +} + + +/*** + * NAME + * ot_tracer_start_span - + * + * ARGUMENTS + * tracer - NOT USED + * operation_name - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static struct otc_span *ot_tracer_start_span(struct otc_tracer *tracer, const char *operation_name) +{ + return ot_tracer_start_span_with_options(tracer, operation_name, nullptr); +} + + +/*** + * NAME + * ot_tracer_inject_text_map - + * + * ARGUMENTS + * tracer - NOT USED + * carrier - + * span_context - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_inject_text_map(struct otc_tracer *tracer, struct otc_text_map_writer *carrier, const struct otc_span_context *span_context) +{ + TextMap text_map; + TextMapCarrier text_map_carrier(text_map); + opentracing::expected<void> rc; + + if (ot_tracer == nullptr) + return otc_propagation_error_code_invalid_tracer; + else if ((tracer == nullptr) || (carrier == nullptr)) + return otc_propagation_error_code_invalid_carrier; + else if (!OT_CTX_IS_VALID(span_context)) + return otc_propagation_error_code_span_context_corrupted; + + if (OT_SPAN_IS_VALID(span_context->span)) { + OT_LOCK_GUARD(span); + + rc = ot_tracer->Inject(ot_span_handle.at(span_context->span->idx)->context(), text_map_carrier); + } + else if (OT_CTX_KEY_IS_VALID(span_context)) { + OT_LOCK_GUARD(span_context); + + rc = ot_tracer->Inject(*(ot_span_context_handle.at(span_context->idx)), text_map_carrier); + } + + if (!rc) + return otc_propagation_error_code_unknown; + else if (text_map.empty()) + return otc_propagation_error_code_unknown; + else if (otc_text_map_new(&(carrier->text_map), text_map.size()) == nullptr) + return otc_propagation_error_code_unknown; + + for (auto const &it : text_map) + if (carrier->set != nullptr) { + otc_propagation_error_code_t retval = carrier->set(carrier, it.first.c_str(), it.second.c_str()); + if (retval != otc_propagation_error_code_success) + return retval; + } + else if (otc_text_map_add(&(carrier->text_map), it.first.c_str(), 0, it.second.c_str(), 0, OT_CAST_STAT(otc_text_map_flags_t, OTC_TEXT_MAP_DUP_KEY | OTC_TEXT_MAP_DUP_VALUE)) == -1) + return otc_propagation_error_code_unknown; + + return otc_propagation_error_code_success; +} + + +/*** + * NAME + * ot_tracer_inject_http_headers - + * + * ARGUMENTS + * tracer - NOT USED + * carrier - + * span_context - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_inject_http_headers(struct otc_tracer *tracer, struct otc_http_headers_writer *carrier, const struct otc_span_context *span_context) +{ + TextMap text_map; + HTTPHeadersCarrier http_headers_carrier(text_map); + opentracing::expected<void> rc; + + if (ot_tracer == nullptr) + return otc_propagation_error_code_invalid_tracer; + else if ((tracer == nullptr) || (carrier == nullptr)) + return otc_propagation_error_code_invalid_carrier; + else if (!OT_CTX_IS_VALID(span_context)) + return otc_propagation_error_code_span_context_corrupted; + + if (OT_SPAN_IS_VALID(span_context->span)) { + OT_LOCK_GUARD(span); + + rc = ot_tracer->Inject(ot_span_handle.at(span_context->span->idx)->context(), http_headers_carrier); + } + else if (OT_CTX_KEY_IS_VALID(span_context)) { + OT_LOCK_GUARD(span_context); + + rc = ot_tracer->Inject(*(ot_span_context_handle.at(span_context->idx)), http_headers_carrier); + } + + if (!rc) + return otc_propagation_error_code_unknown; + else if (text_map.empty()) + return otc_propagation_error_code_unknown; + else if (otc_text_map_new(&(carrier->text_map), text_map.size()) == nullptr) + return otc_propagation_error_code_unknown; + + for (auto const &it : text_map) + if (carrier->set != nullptr) { + otc_propagation_error_code_t retval = carrier->set(carrier, it.first.c_str(), it.second.c_str()); + if (retval != otc_propagation_error_code_success) + return retval; + } + else if (otc_text_map_add(&(carrier->text_map), it.first.c_str(), 0, it.second.c_str(), 0, OT_CAST_STAT(otc_text_map_flags_t, OTC_TEXT_MAP_DUP_KEY | OTC_TEXT_MAP_DUP_VALUE)) == -1) + return otc_propagation_error_code_unknown; + + return otc_propagation_error_code_success; +} + + +/*** + * NAME + * ot_tracer_inject_binary - + * + * ARGUMENTS + * tracer - NOT USED + * carrier - + * span_context - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_inject_binary(struct otc_tracer *tracer, struct otc_custom_carrier_writer *carrier, const struct otc_span_context *span_context) +{ + std::ostringstream oss(std::ios::binary); + opentracing::expected<void> rc; + + if (ot_tracer == nullptr) + return otc_propagation_error_code_invalid_tracer; + else if ((tracer == nullptr) || (carrier == nullptr)) + return otc_propagation_error_code_invalid_carrier; + else if (!OT_CTX_IS_VALID(span_context)) + return otc_propagation_error_code_span_context_corrupted; + + if (OT_SPAN_IS_VALID(span_context->span)) { + OT_LOCK_GUARD(span); + + rc = ot_tracer->Inject(ot_span_handle.at(span_context->span->idx)->context(), oss); + } + else if (OT_CTX_KEY_IS_VALID(span_context)) { + OT_LOCK_GUARD(span_context); + + rc = ot_tracer->Inject(*(ot_span_context_handle.at(span_context->idx)), oss); + } + + if (rc) + if (otc_binary_data_new(&(carrier->binary_data), oss.str().c_str(), oss.str().size()) != nullptr) + return otc_propagation_error_code_success; + + return otc_propagation_error_code_unknown; +} + + +/*** + * NAME + * ot_tracer_inject_custom - + * + * ARGUMENTS + * tracer - NOT USED + * carrier - NOT USED + * span_context - NOT USED + * + * DESCRIPTION + * - NOT IMPLEMENTED + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_inject_custom(struct otc_tracer *tracer, struct otc_custom_carrier_writer *carrier, const struct otc_span_context *span_context) +{ + if ((tracer == nullptr) || (carrier == nullptr)) + return otc_propagation_error_code_invalid_carrier; + else if (!OT_CTX_IS_VALID(span_context)) + return otc_propagation_error_code_span_context_corrupted; + + return otc_propagation_error_code_success; +} + + +/*** + * NAME + * ot_span_context_add - + * + * ARGUMENTS + * span_context - + * span_context_maybe - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_span_context_add(struct otc_span_context **span_context, std::unique_ptr<opentracing::SpanContext> &span_context_maybe) +{ + OT_LOCK_GUARD(span_context); + + if ((*span_context = ot_span_context_new(nullptr)) == nullptr) { + span_context_maybe.reset(nullptr); + + return otc_propagation_error_code_unknown; + } + + ot_span_context_handle.emplace((*span_context)->idx, std::move(span_context_maybe)); + + return otc_propagation_error_code_success; +} + + +/*** + * NAME + * ot_tracer_text_map_add - + * + * ARGUMENTS + * arg - + * key - + * value - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_text_map_add(void *arg, const char *key, const char *value) +{ + TextMap *text_map = OT_CAST_REINTERPRET(TextMap *, arg); + + if ((arg == nullptr) || (key == nullptr) || (value == nullptr)) + return otc_propagation_error_code_unknown; + + text_map->emplace(key, value); + + return otc_propagation_error_code_success; +} + + +/*** + * NAME + * ot_tracer_extract_text_map - + * + * ARGUMENTS + * tracer - NOT USED + * carrier - + * span_context - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_extract_text_map(struct otc_tracer *tracer, const struct otc_text_map_reader *carrier, struct otc_span_context **span_context) +{ + TextMap text_map; + TextMapCarrier text_map_carrier(text_map); + + if (ot_tracer == nullptr) + return otc_propagation_error_code_invalid_tracer; + else if ((tracer == nullptr) || (carrier == nullptr)) + return otc_propagation_error_code_invalid_carrier; + else if (span_context == nullptr) + return otc_propagation_error_code_invalid_span_context; + + if (carrier->foreach_key != nullptr) { + otc_propagation_error_code_t rc = carrier->foreach_key(OT_CAST_CONST(struct otc_text_map_reader *, carrier), ot_tracer_text_map_add, &text_map); + if (rc != otc_propagation_error_code_success) + return rc; + } else { + for (size_t i = 0; i < carrier->text_map.count; i++) + text_map[carrier->text_map.key[i]] = carrier->text_map.value[i]; + } + + auto span_context_maybe = ot_tracer->Extract(text_map_carrier); + if (!span_context_maybe) + return otc_propagation_error_code_span_context_not_found; + + return ot_span_context_add(span_context, *span_context_maybe); +} + + +/*** + * NAME + * ot_tracer_extract_http_headers - + * + * ARGUMENTS + * tracer - NOT USED + * carrier - + * span_context - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_extract_http_headers(struct otc_tracer *tracer, const struct otc_http_headers_reader *carrier, struct otc_span_context **span_context) +{ + TextMap text_map; + HTTPHeadersCarrier http_headers_carrier(text_map); + + if (ot_tracer == nullptr) + return otc_propagation_error_code_invalid_tracer; + else if ((tracer == nullptr) || (carrier == nullptr)) + return otc_propagation_error_code_invalid_carrier; + else if (span_context == nullptr) + return otc_propagation_error_code_invalid_span_context; + + if (carrier->foreach_key != nullptr) { + otc_propagation_error_code_t rc = carrier->foreach_key(OT_CAST_CONST(struct otc_http_headers_reader *, carrier), ot_tracer_text_map_add, &text_map); + if (rc != otc_propagation_error_code_success) + return rc; + } else { + for (size_t i = 0; i < carrier->text_map.count; i++) + text_map[carrier->text_map.key[i]] = carrier->text_map.value[i]; + } + + auto span_context_maybe = ot_tracer->Extract(http_headers_carrier); + if (!span_context_maybe) + return otc_propagation_error_code_span_context_not_found; + + return ot_span_context_add(span_context, *span_context_maybe); +} + + +/*** + * NAME + * ot_tracer_extract_binary - + * + * ARGUMENTS + * tracer - NOT USED + * carrier - + * span_context - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_extract_binary(struct otc_tracer *tracer, const struct otc_custom_carrier_reader *carrier, struct otc_span_context **span_context) +{ + if (ot_tracer == nullptr) + return otc_propagation_error_code_invalid_tracer; + else if ((tracer == nullptr) || (carrier == nullptr)) + return otc_propagation_error_code_invalid_carrier; + else if (span_context == nullptr) + return otc_propagation_error_code_invalid_span_context; + + if ((carrier->binary_data.data == nullptr) || (carrier->binary_data.size == 0)) + return otc_propagation_error_code_invalid_carrier; + + std::string iss_data(OT_CAST_REINTERPRET(const char *, carrier->binary_data.data), carrier->binary_data.size); + std::istringstream iss(iss_data, std::ios::binary); + + auto span_context_maybe = ot_tracer->Extract(iss); + if (!span_context_maybe) + return otc_propagation_error_code_span_context_not_found; + + return ot_span_context_add(span_context, *span_context_maybe); +} + + +/*** + * NAME + * ot_tracer_extract_custom - + * + * ARGUMENTS + * tracer - NOT USED + * carrier - NOT USED + * span_context - NOT USED + * + * DESCRIPTION + * - NOT IMPLEMENTED + * + * RETURN VALUE + * - + */ +static otc_propagation_error_code_t ot_tracer_extract_custom(struct otc_tracer *tracer, const struct otc_custom_carrier_reader *carrier, struct otc_span_context **span_context) +{ + if ((tracer == nullptr) || (carrier == nullptr) || (span_context == nullptr)) + return otc_propagation_error_code_unknown; + + return otc_propagation_error_code_success; +} + + +/*** + * NAME + * ot_tracer_destroy - + * + * ARGUMENTS + * tracer - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * This function does not return a value. + */ +static void ot_tracer_destroy(struct otc_tracer **tracer) +{ + if ((tracer == nullptr) || (*tracer == nullptr)) + return; + + OT_FREE_CLEAR(*tracer); +} + + +/*** + * NAME + * ot_tracer_new - + * + * ARGUMENTS + * This function takes no arguments. + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +struct otc_tracer *ot_tracer_new(void) +{ + const static struct otc_tracer tracer_init = { + .close = ot_tracer_close, /* lock not required */ + .start_span = ot_tracer_start_span, /* lock span */ + .start_span_with_options = ot_tracer_start_span_with_options, /* lock span */ + .inject_text_map = ot_tracer_inject_text_map, /* lock span and/or span_context */ + .inject_http_headers = ot_tracer_inject_http_headers, /* lock span and/or span_context */ + .inject_binary = ot_tracer_inject_binary, /* lock span and/or span_context */ + .inject_custom = ot_tracer_inject_custom, /* NOT IMPLEMENTED */ + .extract_text_map = ot_tracer_extract_text_map, /* lock span_context */ + .extract_http_headers = ot_tracer_extract_http_headers, /* lock span_context */ + .extract_binary = ot_tracer_extract_binary, /* lock span_context */ + .extract_custom = ot_tracer_extract_custom, /* NOT IMPLEMENTED */ + .destroy = ot_tracer_destroy /* lock not required */ + }; + struct otc_tracer *retptr; + + if ((retptr = OT_CAST_TYPEOF(retptr, OTC_DBG_CALLOC(1, sizeof(*retptr)))) != nullptr) + (void)memcpy(retptr, &tracer_init, sizeof(*retptr)); + + return retptr; +} + + +/*** + * NAME + * otc_tracer_load - + * + * ARGUMENTS + * library - + * errbuf - + * errbufsiz - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +struct otc_tracer *otc_tracer_load(const char *library, char *errbuf, int errbufsiz) +{ + std::unique_ptr<opentracing::DynamicTracingLibraryHandle> handle { + new opentracing::DynamicTracingLibraryHandle {} + }; + std::shared_ptr<opentracing::Tracer> tracer; + struct otc_tracer *retptr = nullptr; + + if ((retptr = ot_tracer_new()) == nullptr) { + /* Do nothing. */; + } + else if (ot_tracer_load(library, errbuf, errbufsiz, *handle) == -1) { + retptr->destroy(&retptr); + } + else { + ot_dynlib = std::move(handle); + } + + return retptr; +} + + +/*** + * NAME + * otc_tracer_start - + * + * ARGUMENTS + * cfgfile - + * cfgbuf - + * errbuf - + * errbufsiz - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +int otc_tracer_start(const char *cfgfile, const char *cfgbuf, char *errbuf, int errbufsiz) +{ + std::shared_ptr<opentracing::Tracer> tracer; + char *config = OT_CAST_CONST(char *, cfgbuf); + int retval = -1; + + if (cfgfile != nullptr) { + config = otc_file_read(cfgfile, "#", errbuf, errbufsiz); + if (config == nullptr) + return retval; + } + + if (ot_tracer_start(config, errbuf, errbufsiz, tracer) == -1) { + /* Do nothing. */; + } else { + ot_tracer = std::move(tracer); + + (void)opentracing::Tracer::InitGlobal(ot_tracer); + + retval = 0; + } + + if (config != cfgbuf) + OT_FREE(config); + + return retval; +} + + +/*** + * NAME + * otc_tracer_init - + * + * ARGUMENTS + * library - + * cfgfile - + * cfgbuf - + * errbuf - + * errbufsiz - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +struct otc_tracer *otc_tracer_init(const char *library, const char *cfgfile, const char *cfgbuf, char *errbuf, int errbufsiz) +{ + struct otc_tracer *retptr = nullptr; + + if ((retptr = otc_tracer_load(library, errbuf, errbufsiz)) != nullptr) + if (otc_tracer_start(cfgfile, cfgbuf, errbuf, errbufsiz) == -1) + retptr->destroy(&retptr); + + return retptr; +} + + +/*** + * NAME + * otc_tracer_global - + * + * ARGUMENTS + * tracer - NOT USED + * + * DESCRIPTION + * - NOT IMPLEMENTED + * + * RETURN VALUE + * This function does not return a value. + */ +void otc_tracer_global(struct otc_tracer *tracer) +{ + if (tracer == nullptr) + return; +} + + +/*** + * NAME + * otc_tracer_init_global - + * + * ARGUMENTS + * tracer - NOT USED + * + * DESCRIPTION + * - NOT IMPLEMENTED + * + * RETURN VALUE + * This function does not return a value. + */ +void otc_tracer_init_global(struct otc_tracer *tracer) +{ + if (tracer == nullptr) + return; +} + +/* + * Local variables: + * c-indent-level: 8 + * c-basic-offset: 8 + * End: + * + * vi: noexpandtab shiftwidth=8 tabstop=8 + */ |