Export of internal Abseil changes

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2247e59ee5696e61c7cb24dce479db572980032d by Derek Mauro <dmauro@google.com>:

Ensure ThreadIdentity::WaiterState data has the correct alignment

PiperOrigin-RevId: 357969866

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79bb81a2e6723b186536ad4b4f25cd7ee83f3e72 by Laramie Leavitt <lar@google.com>:

Rework absl::MockingBitGen internal mock registry.

Use a virtual base class with template-specialized derived classes to implement match method rather than taking the address of a function specialization and using casts everywhere.

This combines several of the previously type-erased pointers into a single object, eliminates the separate cleanup container previously used, and eliminates some gratuitous static_cast<>s.

PiperOrigin-RevId: 357827438

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a2eb53d002c9b376360a70b2b0f6a18a1de1e16f by Todd Lipcon <tlipcon@google.com>:

Reduce runtime of sequence_lock_test

PiperOrigin-RevId: 357785571

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dd1175ff13b560f01c4aaa64bc6759a5300e391c by Abseil Team <absl-team@google.com>:

Don't assume that compiling for Windows means that MSVC or clang-cl is being used.

PiperOrigin-RevId: 357760052

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251a9cbede52e729b3a25911b6e225b779c285a8 by Andy Getzendanner <durandal@google.com>:

Internal change.

PiperOrigin-RevId: 357702979
GitOrigin-RevId: 2247e59ee5696e61c7cb24dce479db572980032d
Change-Id: Icd366d3775d88d623695209b5f328dbd69f01d27

1 files changed, 15 insertions, 1 deletions

diff --git a/absl/flags/internal/sequence_lock_test.cc b/absl/flags/internal/sequence_lock_test.cc
index ff8b476b..c3ec372e 100644
--- a/absl/flags/internal/sequence_lock_test.cc
+++ b/absl/flags/internal/sequence_lock_test.cc
@@ -121,11 +121,25 @@ const int kMaxThreads = absl::base_internal::NumCPUs();
 const int kMaxThreads = std::min(absl::base_internal::NumCPUs(), 4);
 #endif
 
+// Return all of the interesting buffer sizes worth testing:
+// powers of two and adjacent values.
+std::vector<int> InterestingBufferSizes() {
+  std::vector<int> ret;
+  for (int v : MultiplicativeRange(1, 128, 2)) {
+    ret.push_back(v);
+    if (v > 1) {
+      ret.push_back(v - 1);
+    }
+    ret.push_back(v + 1);
+  }
+  return ret;
+}
+
 INSTANTIATE_TEST_SUITE_P(
     TestManyByteSizes, ConcurrentSequenceLockTest,
     testing::Combine(
         // Buffer size (bytes).
-        testing::Range(1, 128),
+        testing::ValuesIn(InterestingBufferSizes()),
         // Number of reader threads.
         testing::ValuesIn(MultiplicativeRange(1, kMaxThreads, 2))));