Export of internal Abseil changes

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17141711ee419daa597a9f31e73721f80143e55a by Gennadiy Rozental <rogeeff@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 401384949

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ac48584a7b16e8a12e26d49deb6cddec584a20b5 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 401337785

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8a51bb7c962845e0707240c5ba12c1b80f6fbbe9 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 401047691

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8e18024510869247f3c04c7807c93709eca2322a by Chris Kennelly <ckennelly@google.com>:

Note that SpinLock does not guarantee priorities for wakeups.

PiperOrigin-RevId: 400999238

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75bc09b5f95fbb74b74d14c370bfb80011e8fb7f by Derek Mauro <dmauro@google.com>:

Add visibility restrictions to some internal targets

PiperOrigin-RevId: 400718253

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1de5061016bc42cd7be009c9725ed2343ce12e3d by Abseil Team <absl-team@google.com>:

Make it clear that operator<< can also be used in place of ToString when logging absl::Status.

PiperOrigin-RevId: 400248269

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cda15d9dc6e5cd569de7e5e73f409b72a3caed51 by Abseil Team <absl-team@google.com>:

Minor cleanup

PiperOrigin-RevId: 400087535

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b001375ec47da3a0434be9ca9a45c0df510e7dda by Abseil Team <absl-team@google.com>:

Move periodic_sampler from base/internal to profiling/internal

PiperOrigin-RevId: 400038533

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e7e02e686abc3900e723080849a3607d190ef57f by Abseil Team <absl-team@google.com>:

Move exponential_biased from base/internal to profiling/internal

PiperOrigin-RevId: 400020329
GitOrigin-RevId: 17141711ee419daa597a9f31e73721f80143e55a
Change-Id: I10924df7e1cc198447813dbe97a374a5cef66b49

1 files changed, 0 insertions, 53 deletions

diff --git a/absl/base/internal/periodic_sampler.cc b/absl/base/internal/periodic_sampler.cc
deleted file mode 100644
index 520dabba..00000000
--- a/absl/base/internal/periodic_sampler.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2019 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.
-
-#include "absl/base/internal/periodic_sampler.h"
-
-#include <atomic>
-
-#include "absl/base/internal/exponential_biased.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-int64_t PeriodicSamplerBase::GetExponentialBiased(int period) noexcept {
-  return rng_.GetStride(period);
-}
-
-bool PeriodicSamplerBase::SubtleConfirmSample() noexcept {
-  int current_period = period();
-
-  // Deal with period case 0 (always off) and 1 (always on)
-  if (ABSL_PREDICT_FALSE(current_period < 2)) {
-    stride_ = 0;
-    return current_period == 1;
-  }
-
-  // Check if this is the first call to Sample()
-  if (ABSL_PREDICT_FALSE(stride_ == 1)) {
-    stride_ = static_cast<uint64_t>(-GetExponentialBiased(current_period));
-    if (static_cast<int64_t>(stride_) < -1) {
-      ++stride_;
-      return false;
-    }
-  }
-
-  stride_ = static_cast<uint64_t>(-GetExponentialBiased(current_period));
-  return true;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl