1 files changed, 76 insertions, 0 deletions
diff --git a/pw_trace_tokenized/base_trace_service.cc b/pw_trace_tokenized/base_trace_service.cc
new file mode 100644
index 000000000..56331f377
--- /dev/null
+++ b/pw_trace_tokenized/base_trace_service.cc
@@ -0,0 +1,76 @@
+// 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