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