data_source_internal.h | Explore in Territory

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * 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.
 */

#ifndef INCLUDE_PERFETTO_TRACING_INTERNAL_DATA_SOURCE_INTERNAL_H_
#define INCLUDE_PERFETTO_TRACING_INTERNAL_DATA_SOURCE_INTERNAL_H_

#include <stddef.h>
#include <stdint.h>

#include <array>
#include <atomic>
#include <functional>
#include <memory>
#include <mutex>

// No perfetto headers (other than tracing/api and protozero) should be here.
#include "perfetto/tracing/buffer_exhausted_policy.h"
#include "perfetto/tracing/core/data_source_config.h"
#include "perfetto/tracing/internal/basic_types.h"
#include "perfetto/tracing/trace_writer_base.h"

namespace perfetto {

class DataSourceBase;
class InterceptorBase;
class TraceWriterBase;

namespace internal {

class TracingTLS;

// This maintains the internal state of a data source instance that is used only
// to implement the tracing mechanics and is not exposed to the API client.
// There is one of these object per DataSource instance (up to
// kMaxDataSourceInstances).
struct DataSourceState { … };

// This is to allow lazy-initialization and avoid static initializers and
// at-exit destructors. All the entries are initialized via placement-new when
// DataSource::Register() is called, see TracingMuxerImpl::RegisterDataSource().
struct DataSourceStateStorage { … };

// Per-DataSource-type global state.
struct DataSourceStaticState { … };

// Per-DataSource-instance thread-local state.
struct DataSourceInstanceThreadLocalState { … };

// Per-DataSource-type thread-local state.
struct DataSourceThreadLocalState { … };

}  // namespace internal
}  // namespace perfetto

#endif  // INCLUDE_PERFETTO_TRACING_INTERNAL_DATA_SOURCE_INTERNAL_H_
chromium/third_party/perfetto/include/perfetto/tracing/internal/data_source_internal.h
