Change to checking for use_count() >/== 1.

PiperOrigin-RevId: 510125744
Change-Id: I572cca18c3f827f5d3eefb2ec19a1a014c0090ae

instead of absl::ToUnixNanos(absl::Now());

PiperOrigin-RevId: 509829866
Change-Id: Ib34362762304ad6eb7980a1227d717069b84f656

Supporting _m_prefetchw() (officially part of 3DNOW) across various compilers and platforms turns out to be difficult. This change removes the explicit _m_prefetchw call aimed at MSVC compilers given that it causes issues in clang / chromium compilations.

PiperOrigin-RevId: 509632497
Change-Id: Ib1b6b2cf667cbc1af5ed6651cd9aa0294a9265b6

Make default-constructed swisstable iterators use EmptyGroup() for ctrl_ so that we can distinguish between end() iterators and default-constructed iterators in debug mode.

PiperOrigin-RevId: 509606271
Change-Id: I77b68590b3904a4cf7809b75d814d74cb89603b6

PiperOrigin-RevId: 509581648
Change-Id: Ia60053f1172e0e64569e9555524812fc4788e24f

https://bugs.llvm.org/show_bug.cgi?id=38289 has been addressed since 2019.

We just have to check to see if the clang being used to compile with is any version before major version 9.

PiperOrigin-RevId: 509299527
Change-Id: I2f9a801faf87f968f1625711a67d38a528f0740c

The test was getting tripped by EXPECT_DEATH_IF_SUPPORTED keeping a literal
copy of the test statement.

PiperOrigin-RevId: 509299343
Change-Id: I63da29d844cc630d750535fd4bb13a2895d32541

PiperOrigin-RevId: 509236105
Change-Id: I635f521aff106875f06bb93c332d3e437d0ad409

On Linux Kernels >= 5.4 MSan reports a false positive when accessing thread local storage data from loaded libraries.

This was reported on Chromium (which on some build configurations uses absl as a dynamic library). More info here: crbug.com/1414573.

PiperOrigin-RevId: 508645053
Change-Id: I5d5a97e1ee7230cc23f3934a4ec5594b883918b4

APIs that take KernelTimeout as a parameter can now query if an
absolute or relative timeout was requested. If the underlying API can
only use one type of timeout, the code will do a reasonable
conversion.

The goal is to eventually enable the possibility of using wait times
that are based on monotonic clocks that are safe against system clock
steps.

PiperOrigin-RevId: 508541507
Change-Id: Id08bf13515f3e1bfd78d88393cde98a6fd3ef72c

We change AssertSameContainer to be after AssertIsValidForComparison calls so that we can have more specific failure messages.

PiperOrigin-RevId: 508472485
Change-Id: Iff2f7512086948a4aca7fd403596e8d4fde53b2a

PiperOrigin-RevId: 508124592
Change-Id: Ib183e6e241c81b2760e7f849f8af8e7e2c30ea42

Change implementation of OnlyLiteralZero to only fail if the second overload is chosen, not in overload resolution.

PiperOrigin-RevId: 508031321
Change-Id: I6981371fbc6498047babe3468f3343090f8bda47

PiperOrigin-RevId: 507790741
Change-Id: I347357f9a2d698510f29b7d1b065ef73f9289292

Fix a discrepancy between absl::Hash and absl::HashOf for some negative signed integral types and improve the performance of absl::Hash.

PiperOrigin-RevId: 507598042
Change-Id: I96a7bd6b9c360f435f216b2671ae84d9768a46e8

`PrefetchToLocalCacheForWrite` should use `__builtin_prefetch(<addr>, 1, 3)` not `__builtin_prefetch<addr>, 1, 0)`

PiperOrigin-RevId: 507015724
Change-Id: I99f44fe819c27e6dcc0bb7b36f1a37015c6f1987

PiperOrigin-RevId: 506944023
Change-Id: I04ff13dcec89c57ba03707f5698c4198434216b6

PiperOrigin-RevId: 506622658
Change-Id: I17ae2d97a6cadb7bdd8ebd0ec0dd3976568cb7e1

Get rid of tail padding within `absl::Duration`. This reduces memory usage needs when storing duration in containers (e.g. `vector<absl::Duration>` uses 25% less memory), and allows classes with `absl::Duration` fields to fit other stuff in memory previously used by tail padding (e.g. `std::optional<absl::Duration>` is now 16 bytes instead of 24).

PiperOrigin-RevId: 506568782
Change-Id: Ic9e077f02a80da013fb2d312aff77761b970c07a

Get rid of tail padding within `absl::Duration`. This reduces memory usage needs when storing duration in containers (e.g. `vector<absl::Duration>` uses 25% less memory), and allows classes with `absl::Duration` fields to fit other stuff in memory previously used by tail padding (e.g. `std::optional<absl::Duration>` is now 16 bytes instead of 24).

PiperOrigin-RevId: 506543503
Change-Id: Ifeb2397c953a5d3da317a70ab49a3ebb85042344

PiperOrigin-RevId: 506323250
Change-Id: I0f7d4532c19088b011740ceff87ecec55cc34edb

Rollforward: in sanitizer mode, detect when references become invalidated by randomly rehashing on insertions when there is no reserved growth.

Rollforward of ed59f62f

PiperOrigin-RevId: 506314970
Change-Id: I7a654aef36bb169da9ea5c618789ee771f05fe28

PiperOrigin-RevId: 506151912
Change-Id: I388884b0bd80ef0f8a0b3d3c7d0e1b404ddfb742

Rollback in sanitizer mode, detect when references become invalidated by randomly rehashing on insertions when there is no reserved growth.

Rollback of ed59f62f

PiperOrigin-RevId: 506003574
Change-Id: I1766321f279a3226e2821e0390387d5639d28964

In sanitizer mode, detect when references become invalidated by randomly rehashing on insertions when there is no reserved growth.

PiperOrigin-RevId: 505807487
Change-Id: I9051a04f6a75e579d16e9ae8defd404bcc377fba

On some glibcs, this is defined as a call to sysconf(), which returns a long.

PiperOrigin-RevId: 505380003
Change-Id: I53207846d733d3a529630a6aff9bca425cf90a21

PiperOrigin-RevId: 505184961
Change-Id: I64482558a76abda6896bec4b2d323833b6cd7edf

`absl::Hex` and `absl::Dec` are now stringifiable through `AbslStringify`. This means that they can be passed to logging, `absl::StrFormat`, `absl::StrCat` and `absl::Substitute`. Note that this change will break unsupported usages of `absl::AlphaNum`. `absl::AlphaNum` is not intended to be instantiated as a stack variable due to lifetime issues. Unsupported usages include:

* constructing an `absl::AlphaNum` as a local variable.
  * For example, `absl::AlphaNum a = absl::Hex(...);`
* declaring an `absl::AlphaNum` as a member variable

Usage of `absl::AlphaNum` as a function parameter will continue to be supported.

PiperOrigin-RevId: 505158534
Change-Id: Idecdf0b3d137482e86b393c7480229343d68eb36

PiperOrigin-RevId: 504981951
Change-Id: I7357e8e6730ceda458b40aa605cd450e80271dc6

PiperOrigin-RevId: 504941246
Change-Id: I94c1e85afd254e84948477b511d41eeb8285fdae

PiperOrigin-RevId: 504866618
Change-Id: I9519299946c693ae1bedd769a25a9cb5137f2f54

Fixes #1360

PiperOrigin-RevId: 504850733
Change-Id: Ifa1e83d0c703ed69c969a12076db474caec9d496

PiperOrigin-RevId: 504728034
Change-Id: Ifb338247b7484426e25a58580783a1d70d27e6fd

The DLL export issue isn't a problem currently, since we don't explicitly export any symbols from the test dll.  This will be an issue in the future though.  Additionally, there was a typo in absl_internal_test_dll_contains that caused abseil_test_dll to be empty (and therefore not create a lib file).

PiperOrigin-RevId: 504555797
Change-Id: Ic7b50bcbe704f7c8fd44028071abcf5d6babb2cf

PiperOrigin-RevId: 504555535
Change-Id: Id40484e9f52c87e9d67def2735ee60481ca50526

This broke builds of abseil_test_dll, since CMake can't find the file we incorrectly specified.

PiperOrigin-RevId: 504372451
Change-Id: I6cd5a44f12bb2f473fae2ac920e047e782ae9524