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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TRACING_TRACE_TIME_H_
#define BASE_TRACING_TRACE_TIME_H_
#include "build/build_config.h"
#include "third_party/perfetto/protos/perfetto/common/builtin_clock.pbzero.h"
namespace base {
namespace tracing {
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \
BUILDFLAG(IS_FUCHSIA)
// Linux, Android, and Fuchsia all use CLOCK_MONOTONIC. See crbug.com/166153
// about efforts to unify base::TimeTicks across all platforms.
constexpr perfetto::protos::pbzero::BuiltinClock kTraceClockId =
perfetto::protos::pbzero::BUILTIN_CLOCK_MONOTONIC;
#else
// Mac and Windows TimeTicks advance when sleeping, so are closest to BOOTTIME
// in behavior.
// TODO(eseckler): Support specifying Mac/Win platform clocks in BuiltinClock.
constexpr perfetto::protos::pbzero::BuiltinClock kTraceClockId =
perfetto::protos::pbzero::BUILTIN_CLOCK_BOOTTIME;
#endif
// Returns CLOCK_BOOTTIME on systems that support it, otherwise falls back to
// TRACE_TIME_TICKS_NOW().
int64_t TraceBootTicksNow();
} // namespace tracing
} // namespace base
#endif // BASE_TRACING_TRACE_TIME_H_
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