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Roll abseil_revision 9398fa76a3..df19c20996
Change Log: https://chromium.googlesource.com/external/github.com/abseil/abseil-cpp/+log/9398fa76a3..df19c20996 Full diff: https://chromium.googlesource.com/external/github.com/abseil/abseil-cpp/+/9398fa76a3..df19c20996 No .def changes Bug: chromium:1367773 Change-Id: I61f03a1390ee04768d81309a12712a2462e82ab9 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3925454 Reviewed-by: Mirko Bonadei <mbonadei@chromium.org> Commit-Queue: Danil Chapovalov <danilchap@chromium.org> Cr-Commit-Position: refs/heads/main@{#1052299}
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Danil Chapovalov
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Chromium LUCI CQ
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third_party/abseil-cpp/absl/base/internal/cycleclock_config.h
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// Copyright 2022 The Abseil Authors | ||
// | ||
// 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 | ||
// | ||
// https://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. | ||
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#ifndef ABSL_BASE_INTERNAL_CYCLECLOCK_CONFIG_H_ | ||
#define ABSL_BASE_INTERNAL_CYCLECLOCK_CONFIG_H_ | ||
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#include <cstdint> | ||
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#include "absl/base/config.h" | ||
#include "absl/base/internal/inline_variable.h" | ||
#include "absl/base/internal/unscaledcycleclock_config.h" | ||
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namespace absl { | ||
ABSL_NAMESPACE_BEGIN | ||
namespace base_internal { | ||
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#if ABSL_USE_UNSCALED_CYCLECLOCK | ||
#ifdef NDEBUG | ||
#ifdef ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY | ||
// Not debug mode and the UnscaledCycleClock frequency is the CPU | ||
// frequency. Scale the CycleClock to prevent overflow if someone | ||
// tries to represent the time as cycles since the Unix epoch. | ||
ABSL_INTERNAL_INLINE_CONSTEXPR(int32_t, kCycleClockShift, 1); | ||
#else | ||
// Not debug mode and the UnscaledCycleClock isn't operating at the | ||
// raw CPU frequency. There is no need to do any scaling, so don't | ||
// needlessly sacrifice precision. | ||
ABSL_INTERNAL_INLINE_CONSTEXPR(int32_t, kCycleClockShift, 0); | ||
#endif | ||
#else // NDEBUG | ||
// In debug mode use a different shift to discourage depending on a | ||
// particular shift value. | ||
ABSL_INTERNAL_INLINE_CONSTEXPR(int32_t, kCycleClockShift, 2); | ||
#endif // NDEBUG | ||
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ABSL_INTERNAL_INLINE_CONSTEXPR(double, kCycleClockFrequencyScale, | ||
1.0 / (1 << kCycleClockShift)); | ||
#endif // ABSL_USE_UNSCALED_CYCLECLOC | ||
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} // namespace base_internal | ||
ABSL_NAMESPACE_END | ||
} // namespace absl | ||
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#endif // ABSL_BASE_INTERNAL_CYCLECLOCK_CONFIG_H_ |
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third_party/abseil-cpp/absl/base/internal/unscaledcycleclock_config.h
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// Copyright 2022 The Abseil Authors | ||
// | ||
// 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 | ||
// | ||
// https://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. | ||
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#ifndef ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_CONFIG_H_ | ||
#define ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_CONFIG_H_ | ||
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#if defined(__APPLE__) | ||
#include <TargetConditionals.h> | ||
#endif | ||
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// The following platforms have an implementation of a hardware counter. | ||
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \ | ||
defined(__powerpc__) || defined(__ppc__) || defined(__riscv) || \ | ||
defined(_M_IX86) || (defined(_M_X64) && !defined(_M_ARM64EC)) | ||
#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1 | ||
#else | ||
#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 0 | ||
#endif | ||
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// The following platforms often disable access to the hardware | ||
// counter (through a sandbox) even if the underlying hardware has a | ||
// usable counter. The CycleTimer interface also requires a *scaled* | ||
// CycleClock that runs at atleast 1 MHz. We've found some Android | ||
// ARM64 devices where this is not the case, so we disable it by | ||
// default on Android ARM64. | ||
#if defined(__native_client__) || (defined(__APPLE__)) || \ | ||
(defined(__ANDROID__) && defined(__aarch64__)) | ||
#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 0 | ||
#else | ||
#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 1 | ||
#endif | ||
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// UnscaledCycleClock is an optional internal feature. | ||
// Use "#if ABSL_USE_UNSCALED_CYCLECLOCK" to test for its presence. | ||
// Can be overridden at compile-time via -DABSL_USE_UNSCALED_CYCLECLOCK=0|1 | ||
#if !defined(ABSL_USE_UNSCALED_CYCLECLOCK) | ||
#define ABSL_USE_UNSCALED_CYCLECLOCK \ | ||
(ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION && \ | ||
ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT) | ||
#endif | ||
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#if ABSL_USE_UNSCALED_CYCLECLOCK | ||
// This macro can be used to test if UnscaledCycleClock::Frequency() | ||
// is NominalCPUFrequency() on a particular platform. | ||
#if (defined(__i386__) || defined(__x86_64__) || defined(__riscv) || \ | ||
defined(_M_IX86) || defined(_M_X64)) | ||
#define ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY | ||
#endif | ||
#endif | ||
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#endif // ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_CONFIG_H_ |
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