From 5aa5d282eac56a21e74611c1cdbaa97bb5db2dca Mon Sep 17 00:00:00 2001 From: Vincent Ambo Date: Tue, 8 Feb 2022 02:05:36 +0300 Subject: chore(3p/abseil_cpp): unvendor abseil_cpp we weren't actually using these sources anymore, okay? Change-Id: If701571d9716de308d3512e1eb22c35db0877a66 Reviewed-on: https://cl.tvl.fyi/c/depot/+/5248 Tested-by: BuildkiteCI Reviewed-by: grfn Autosubmit: tazjin --- .../abseil_cpp/absl/base/internal/cycleclock.cc | 107 --------------------- 1 file changed, 107 deletions(-) delete mode 100644 third_party/abseil_cpp/absl/base/internal/cycleclock.cc (limited to 'third_party/abseil_cpp/absl/base/internal/cycleclock.cc') diff --git a/third_party/abseil_cpp/absl/base/internal/cycleclock.cc b/third_party/abseil_cpp/absl/base/internal/cycleclock.cc deleted file mode 100644 index 0e65005b8914..000000000000 --- a/third_party/abseil_cpp/absl/base/internal/cycleclock.cc +++ /dev/null @@ -1,107 +0,0 @@ -// Copyright 2017 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. - -// The implementation of CycleClock::Frequency. -// -// NOTE: only i386 and x86_64 have been well tested. -// PPC, sparc, alpha, and ia64 are based on -// http://peter.kuscsik.com/wordpress/?p=14 -// with modifications by m3b. See also -// https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h - -#include "absl/base/internal/cycleclock.h" - -#include -#include // NOLINT(build/c++11) - -#include "absl/base/internal/unscaledcycleclock.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { - -#if ABSL_USE_UNSCALED_CYCLECLOCK - -namespace { - -#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. -static constexpr int32_t kShift = 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. -static constexpr int32_t kShift = 0; -#endif -#else -// In debug mode use a different shift to discourage depending on a -// particular shift value. -static constexpr int32_t kShift = 2; -#endif - -static constexpr double kFrequencyScale = 1.0 / (1 << kShift); -static std::atomic cycle_clock_source; - -CycleClockSourceFunc LoadCycleClockSource() { - // Optimize for the common case (no callback) by first doing a relaxed load; - // this is significantly faster on non-x86 platforms. - if (cycle_clock_source.load(std::memory_order_relaxed) == nullptr) { - return nullptr; - } - // This corresponds to the store(std::memory_order_release) in - // CycleClockSource::Register, and makes sure that any updates made prior to - // registering the callback are visible to this thread before the callback is - // invoked. - return cycle_clock_source.load(std::memory_order_acquire); -} - -} // namespace - -int64_t CycleClock::Now() { - auto fn = LoadCycleClockSource(); - if (fn == nullptr) { - return base_internal::UnscaledCycleClock::Now() >> kShift; - } - return fn() >> kShift; -} - -double CycleClock::Frequency() { - return kFrequencyScale * base_internal::UnscaledCycleClock::Frequency(); -} - -void CycleClockSource::Register(CycleClockSourceFunc source) { - // Corresponds to the load(std::memory_order_acquire) in LoadCycleClockSource. - cycle_clock_source.store(source, std::memory_order_release); -} - -#else - -int64_t CycleClock::Now() { - return std::chrono::duration_cast( - std::chrono::steady_clock::now().time_since_epoch()) - .count(); -} - -double CycleClock::Frequency() { - return 1e9; -} - -#endif - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl -- cgit 1.4.1