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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_VIZ_COMMON_PERFORMANCE_HINT_UTILS_H_
#define COMPONENTS_VIZ_COMMON_PERFORMANCE_HINT_UTILS_H_
#include "base/containers/flat_set.h"
#include "base/process/process_handle.h"
#include "base/threading/platform_thread.h"
#include "components/viz/common/viz_common_export.h"
namespace viz {
// Browser and Renderers use this struct to pass information about threads
// involved in frame production to Viz. Viz then uses the Android
// PerformanceHint API to optimize these threads' scheduling.
struct VIZ_COMMON_EXPORT Thread {
enum class Type {
kMain,
kIO,
kCompositor,
kVideo,
kOther,
};
base::PlatformThreadId id;
Type type;
friend constexpr bool operator==(const Thread&, const Thread&) = default;
};
// Check that thread IDs in `thread_ids_from_sandboxed_process` are not in
// current process. This function should be called from the Browser and the GPU
// processes. Android OS will check that thread IDs used for performance hint
// belongs to a chromium process. So this check ensures that thread IDs
// reported by sandboxed processes are indeed in sandboxed processes.
VIZ_COMMON_EXPORT bool CheckThreadIdsDoNotBelongToCurrentProcess(
const base::flat_set<base::PlatformThreadId>&
thread_ids_from_sandboxed_process);
} // namespace viz
#endif // COMPONENTS_VIZ_COMMON_PERFORMANCE_HINT_UTILS_H_
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