chromium/third_party/perfetto/include/perfetto/tracing/internal/data_source_type.h

#ifndef INCLUDE_PERFETTO_TRACING_INTERNAL_DATA_SOURCE_TYPE_H_
#define INCLUDE_PERFETTO_TRACING_INTERNAL_DATA_SOURCE_TYPE_H_

#include "perfetto/base/build_config.h"
#include "perfetto/base/export.h"
#include "perfetto/tracing/core/forward_decls.h"
#include "perfetto/tracing/internal/data_source_internal.h"
#include "perfetto/tracing/internal/tracing_muxer.h"

namespace perfetto {
namespace internal {

// Represents a data source type (not an instance).
//
// All the static state of a DataSource<T> lives here (including
// DataSourceStaticState).
//
// The C shared library API wrapper cannot use DataSource<T>, because it needs
// to create new data source types at runtime, so it uses this directly.
//
// The main reason why this intermediate class exist is to decouple the
// DataSourceStaticState from the specific DataSource<T>. The C API cannot
// dynamically create template instances and it needs a way to decouple those at
// runtime.
class PERFETTO_EXPORT_COMPONENT DataSourceType { … };

}  // namespace internal
}  // namespace perfetto

#endif  // INCLUDE_PERFETTO_TRACING_INTERNAL_DATA_SOURCE_TYPE_H_