Creation of LTS branch "lts_2018_12_18"20181200

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GitOrigin-RevId: 44b0fafc62d9b8f192e8180cbe9c4b806b339d57
Change-Id: I2c427b5b41b2d34101922048b00f3d9dafcb498d

14 files changed, 48 insertions, 47 deletions

diff --git a/absl/synchronization/internal/create_thread_identity.cc b/absl/synchronization/internal/create_thread_identity.cc
index 38cc7e2f..f27f16da 100644
--- a/absl/synchronization/internal/create_thread_identity.cc
+++ b/absl/synchronization/internal/create_thread_identity.cc
@@ -27,7 +27,7 @@
 #include "absl/synchronization/internal/per_thread_sem.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 // ThreadIdentity storage is persistent, we maintain a free-list of previously
@@ -108,7 +108,7 @@ base_internal::ThreadIdentity* CreateThreadIdentity() {
 }
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 
 #endif  // ABSL_LOW_LEVEL_ALLOC_MISSING
diff --git a/absl/synchronization/internal/create_thread_identity.h b/absl/synchronization/internal/create_thread_identity.h
index 05b5f7e1..1132d516 100644
--- a/absl/synchronization/internal/create_thread_identity.h
+++ b/absl/synchronization/internal/create_thread_identity.h
@@ -29,7 +29,7 @@
 #include "absl/base/port.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 // Allocates and attaches a ThreadIdentity object for the calling thread.
@@ -50,6 +50,6 @@ inline base_internal::ThreadIdentity* GetOrCreateCurrentThreadIdentity() {
 }
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 #endif  // ABSL_SYNCHRONIZATION_INTERNAL_CREATE_THREAD_IDENTITY_H_
diff --git a/absl/synchronization/internal/graphcycles.cc b/absl/synchronization/internal/graphcycles.cc
index 5a015844..139be0f5 100644
--- a/absl/synchronization/internal/graphcycles.cc
+++ b/absl/synchronization/internal/graphcycles.cc
@@ -44,7 +44,7 @@
 // Do not use STL.   This module does not use standard memory allocation.
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 namespace {
@@ -205,8 +205,7 @@ class NodeSet {
   }
 
  private:
-  static const int32_t kEmpty;
-  static const int32_t kDel;
+  enum : int32_t { kEmpty = -1, kDel = -2 };
   Vec<int32_t> table_;
   uint32_t occupied_;     // Count of non-empty slots (includes deleted slots)
 
@@ -256,9 +255,6 @@ class NodeSet {
   NodeSet& operator=(const NodeSet&) = delete;
 };
 
-const int32_t NodeSet::kEmpty = -1;
-const int32_t NodeSet::kDel = -2;
-
 // We encode a node index and a node version in GraphId.  The version
 // number is incremented when the GraphId is freed which automatically
 // invalidates all copies of the GraphId.
@@ -695,7 +691,7 @@ int GraphCycles::GetStackTrace(GraphId id, void*** ptr) {
 }
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 
 #endif  // ABSL_LOW_LEVEL_ALLOC_MISSING
diff --git a/absl/synchronization/internal/graphcycles.h b/absl/synchronization/internal/graphcycles.h
index e43ae26b..6609ea06 100644
--- a/absl/synchronization/internal/graphcycles.h
+++ b/absl/synchronization/internal/graphcycles.h
@@ -41,7 +41,7 @@
 #include <cstdint>
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 // Opaque identifier for a graph node.
@@ -133,7 +133,7 @@ class GraphCycles {
 };
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 
 #endif
diff --git a/absl/synchronization/internal/graphcycles_test.cc b/absl/synchronization/internal/graphcycles_test.cc
index 09332bad..4dc2bdc5 100644
--- a/absl/synchronization/internal/graphcycles_test.cc
+++ b/absl/synchronization/internal/graphcycles_test.cc
@@ -25,7 +25,7 @@
 #include "absl/base/macros.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 // We emulate a GraphCycles object with a node vector and an edge vector.
@@ -460,5 +460,5 @@ TEST_F(GraphCyclesTest, ManyEdges) {
 }
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
diff --git a/absl/synchronization/internal/kernel_timeout.h b/absl/synchronization/internal/kernel_timeout.h
index 3d3dc0cb..34ae94ec 100644
--- a/absl/synchronization/internal/kernel_timeout.h
+++ b/absl/synchronization/internal/kernel_timeout.h
@@ -25,9 +25,6 @@
 #ifndef ABSL_SYNCHRONIZATION_INTERNAL_KERNEL_TIMEOUT_H_
 #define ABSL_SYNCHRONIZATION_INTERNAL_KERNEL_TIMEOUT_H_
 
-#ifdef _WIN32
-#include <intsafe.h>
-#endif
 #include <time.h>
 #include <algorithm>
 #include <limits>
@@ -37,7 +34,7 @@
 #include "absl/time/time.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 class Futex;
@@ -80,7 +77,7 @@ class KernelTimeout {
     if (x <= 0) x = 1;
     // A time larger than what can be represented to the kernel is treated
     // as no timeout.
-    if (x == std::numeric_limits<int64_t>::max()) x = 0;
+    if (x == (std::numeric_limits<int64_t>::max)()) x = 0;
     return x;
   }
 
@@ -94,7 +91,7 @@ class KernelTimeout {
           ERROR,
           "Tried to create a timespec from a non-timeout; never do this.");
       // But we'll try to continue sanely.  no-timeout ~= saturated timeout.
-      n = std::numeric_limits<int64_t>::max();
+      n = (std::numeric_limits<int64_t>::max)();
     }
 
     // Kernel APIs validate timespecs as being at or after the epoch,
@@ -105,7 +102,7 @@ class KernelTimeout {
 
     struct timespec abstime;
     int64_t seconds = std::min(n / kNanosPerSecond,
-                             int64_t{std::numeric_limits<time_t>::max()});
+                             int64_t{(std::numeric_limits<time_t>::max)()});
     abstime.tv_sec = static_cast<time_t>(seconds);
     abstime.tv_nsec =
         static_cast<decltype(abstime.tv_nsec)>(n % kNanosPerSecond);
@@ -118,9 +115,14 @@ class KernelTimeout {
   // Windows. Callers should recognize that the return value is a
   // relative duration (it should be recomputed by calling this method
   // in the case of a spurious wakeup).
-  DWORD InMillisecondsFromNow() const {
+  // This header file may be included transitively by public header files,
+  // so we define our own DWORD and INFINITE instead of getting them from
+  // <intsafe.h> and <WinBase.h>.
+  typedef unsigned long DWord;  // NOLINT
+  DWord InMillisecondsFromNow() const {
+    constexpr DWord kInfinite = (std::numeric_limits<DWord>::max)();
     if (!has_timeout()) {
-      return INFINITE;
+      return kInfinite;
     }
     // The use of absl::Now() to convert from absolute time to
     // relative time means that absl::Now() cannot use anything that
@@ -129,13 +131,13 @@ class KernelTimeout {
     if (ns_ >= now) {
       // Round up so that Now() + ms_from_now >= ns_.
       constexpr uint64_t max_nanos =
-          std::numeric_limits<int64_t>::max() - 999999u;
+          (std::numeric_limits<int64_t>::max)() - 999999u;
       uint64_t ms_from_now =
           (std::min<uint64_t>(max_nanos, ns_ - now) + 999999u) / 1000000u;
-      if (ms_from_now > std::numeric_limits<DWORD>::max()) {
-        return INFINITE;
+      if (ms_from_now > kInfinite) {
+        return kInfinite;
       }
-      return static_cast<DWORD>(ms_from_now);
+      return static_cast<DWord>(ms_from_now);
     }
     return 0;
   }
@@ -146,6 +148,6 @@ class KernelTimeout {
 };
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 #endif  // ABSL_SYNCHRONIZATION_INTERNAL_KERNEL_TIMEOUT_H_
diff --git a/absl/synchronization/internal/mutex_nonprod.cc b/absl/synchronization/internal/mutex_nonprod.cc
index a8071a96..4b0b8bcd 100644
--- a/absl/synchronization/internal/mutex_nonprod.cc
+++ b/absl/synchronization/internal/mutex_nonprod.cc
@@ -31,7 +31,7 @@
 #include "absl/time/time.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 namespace {
@@ -316,5 +316,5 @@ bool Condition::Eval() const {
 
 void RegisterSymbolizer(bool (*)(const void*, char*, int)) {}
 
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
diff --git a/absl/synchronization/internal/mutex_nonprod.inc b/absl/synchronization/internal/mutex_nonprod.inc
index 2d06285f..0ae4c0ea 100644
--- a/absl/synchronization/internal/mutex_nonprod.inc
+++ b/absl/synchronization/internal/mutex_nonprod.inc
@@ -36,7 +36,7 @@
 #endif
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 class Condition;
 
 namespace synchronization_internal {
@@ -254,5 +254,5 @@ class SynchronizationStorage {
 };
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
diff --git a/absl/synchronization/internal/per_thread_sem.cc b/absl/synchronization/internal/per_thread_sem.cc
index 53b789d6..9de2d136 100644
--- a/absl/synchronization/internal/per_thread_sem.cc
+++ b/absl/synchronization/internal/per_thread_sem.cc
@@ -25,7 +25,7 @@
 #include "absl/synchronization/internal/waiter.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 void PerThreadSem::SetThreadBlockedCounter(std::atomic<int> *counter) {
@@ -59,7 +59,7 @@ void PerThreadSem::Tick(base_internal::ThreadIdentity *identity) {
 }
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 
 extern "C" {
diff --git a/absl/synchronization/internal/per_thread_sem.h b/absl/synchronization/internal/per_thread_sem.h
index fc64f768..6efd5951 100644
--- a/absl/synchronization/internal/per_thread_sem.h
+++ b/absl/synchronization/internal/per_thread_sem.h
@@ -32,7 +32,7 @@
 #include "absl/synchronization/internal/kernel_timeout.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 
 class Mutex;
 
@@ -81,7 +81,7 @@ class PerThreadSem {
 };
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 
 // In some build configurations we pass --detect-odr-violations to the
diff --git a/absl/synchronization/internal/per_thread_sem_test.cc b/absl/synchronization/internal/per_thread_sem_test.cc
index 63c8e56a..18b2458b 100644
--- a/absl/synchronization/internal/per_thread_sem_test.cc
+++ b/absl/synchronization/internal/per_thread_sem_test.cc
@@ -33,7 +33,7 @@
 // primitives which might use PerThreadSem, most notably absl::Mutex.
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 class SimpleSemaphore {
@@ -154,12 +154,15 @@ TEST_F(PerThreadSemTest, WithTimeout) {
 
 TEST_F(PerThreadSemTest, Timeouts) {
   absl::Time timeout = absl::Now() + absl::Milliseconds(50);
+  // Allow for a slight early return, to account for quality of implementation
+  // issues on various platforms.
+  const absl::Duration slop = absl::Microseconds(200);
   EXPECT_FALSE(Wait(timeout));
-  EXPECT_LE(timeout, absl::Now());
+  EXPECT_LE(timeout, absl::Now() + slop);
 
   absl::Time negative_timeout = absl::UnixEpoch() - absl::Milliseconds(100);
   EXPECT_FALSE(Wait(negative_timeout));
-  EXPECT_LE(negative_timeout, absl::Now());  // trivially true :)
+  EXPECT_LE(negative_timeout, absl::Now() + slop);  // trivially true :)
 
   Post(GetOrCreateCurrentThreadIdentity());
   // The wait here has an expired timeout, but we have a wake to consume,
@@ -170,5 +173,5 @@ TEST_F(PerThreadSemTest, Timeouts) {
 }  // namespace
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
diff --git a/absl/synchronization/internal/thread_pool.h b/absl/synchronization/internal/thread_pool.h
index 82dedbf5..66c7546b 100644
--- a/absl/synchronization/internal/thread_pool.h
+++ b/absl/synchronization/internal/thread_pool.h
@@ -25,7 +25,7 @@
 #include "absl/synchronization/mutex.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 // A simple ThreadPool implementation for tests.
@@ -86,7 +86,7 @@ class ThreadPool {
 };
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 
 #endif  // ABSL_SYNCHRONIZATION_INTERNAL_THREAD_POOL_H_
diff --git a/absl/synchronization/internal/waiter.cc b/absl/synchronization/internal/waiter.cc
index ad86acce..76fdd861 100644
--- a/absl/synchronization/internal/waiter.cc
+++ b/absl/synchronization/internal/waiter.cc
@@ -46,7 +46,7 @@
 #include "absl/synchronization/internal/kernel_timeout.h"
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 static void MaybeBecomeIdle() {
@@ -410,5 +410,5 @@ void Waiter::Poke() {
 #endif
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
diff --git a/absl/synchronization/internal/waiter.h b/absl/synchronization/internal/waiter.h
index 1c284c0a..2b737260 100644
--- a/absl/synchronization/internal/waiter.h
+++ b/absl/synchronization/internal/waiter.h
@@ -53,7 +53,7 @@
 #endif
 
 namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
 namespace synchronization_internal {
 
 // Waiter is an OS-specific semaphore.
@@ -135,7 +135,7 @@ class Waiter {
 };
 
 }  // namespace synchronization_internal
-}  // inline namespace lts_2018_06_20
+}  // inline namespace lts_2018_12_18
 }  // namespace absl
 
 #endif  // ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_