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// Copyright 2023 The Pigweed Authors
//
// 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
//
// https://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 "pw_trace_tokenized/base_trace_service.h"
#include "pw_log/log.h"
#include "pw_trace_tokenized/trace_buffer.h"
namespace pw::trace {
BaseTraceService::BaseTraceService(TokenizedTracer& tokenized_tracer,
stream::Writer& trace_writer)
: tokenized_tracer_(tokenized_tracer), trace_writer_(trace_writer) {
tokenized_tracer_.Enable(false);
}
Status BaseTraceService::Start() {
PW_LOG_INFO("Starting Tracing");
if (tokenized_tracer_.IsEnabled()) {
PW_LOG_INFO("Tracing already started");
return Status::FailedPrecondition();
}
tokenized_tracer_.Enable(true);
return OkStatus();
}
Status BaseTraceService::Stop() {
PW_LOG_INFO("Stopping Tracing");
if (!tokenized_tracer_.IsEnabled()) {
PW_LOG_INFO("Tracing not started");
return Status::FailedPrecondition();
}
tokenized_tracer_.Enable(false);
auto ring_buffer = trace::GetBuffer();
if (ring_buffer->EntryCount() == 0) {
PW_LOG_WARN("EntryCount(%zu)", ring_buffer->EntryCount());
return Status::Unavailable();
} else if (ring_buffer->CheckForCorruption() != OkStatus()) {
PW_LOG_ERROR("EntryCount(%zu), Corruption(%d)",
ring_buffer->EntryCount(),
ring_buffer->CheckForCorruption().code());
return Status::Unavailable();
}
PW_LOG_INFO("EntryCount(%zu)", ring_buffer->EntryCount());
ConstByteSpan inner_trace_span = trace::DeringAndViewRawBuffer();
if (auto status = trace_writer_.Write(inner_trace_span);
status != OkStatus()) {
PW_LOG_ERROR("Failed to write trace data: %d)", status.code());
return status;
}
ring_buffer->Clear();
return OkStatus();
}
} // namespace pw::trace
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