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* Add a NOLINT to ABSL_UNREACHABLE() to disable the clang-tidy warningGravatar Derek Mauro2022-12-22
| | | | | | | that the assert can be a static_assert PiperOrigin-RevId: 497161039 Change-Id: If714cb25ca1d9481ada94b3b5b4cb16a4dd4e85a
* Adds ABSL_UNREACHABLE(), a public symbol to replace ABSL_INTERNAL_UNREACHABLEGravatar Derek Mauro2022-12-21
| | | | | | | | | | | ABSL_UNREACHABLE() is an unreachable statement. A program which reaches one has undefined behavior, and the compiler may optimize accordingly. The behavior is changed to abort the program in !NDEBUG or ABSL_OPTION_HARDENED modes. PiperOrigin-RevId: 496917150 Change-Id: If036b2d9567933fa266fbcd33f3f98c682ad7f41
* Tagged most functions in absl/time/time.h as ABSL_ATTRIBUTE_CONST_FUNCTION ↵Gravatar Abseil Team2022-12-20
| | | | | | | | | or ABSL_ATTRIBUTE_PURE_FUNCTION However, both absl_attributes are now unimplemented to avoid breaking existing users. PiperOrigin-RevId: 496769399 Change-Id: I9c00cb60b885526300d744f9ea7c0f2178f092bb
* Fix throw_delegate_test when using libc++ with shared librariesGravatar Derek Mauro2022-11-10
| | | | | PiperOrigin-RevId: 487707178 Change-Id: Ie8f57a6327a6460ab37566b8b6f56d470f6dd2dc
* Refactor the throw_delegate test into separate test casesGravatar Derek Mauro2022-11-10
| | | | | PiperOrigin-RevId: 487592054 Change-Id: Iff24f6e2a304fbc85843f10417fc3343c41333da
* Enforce Visual Studio 2017 (MSVC++ 15.0) minumumGravatar Derek Mauro2022-10-26
| | | | | PiperOrigin-RevId: 483972593 Change-Id: I5358871cdf825bbfae65bf9f5872c4fd56005fb7
* Use the `-l` form for MinGW-specific link dependenciesGravatar Russell Johnston2022-10-15
| | | | | This corrects the generated .pc files, so these libs match the other libs already included there.
* Configure ABSL_CACHE_ALIGNED for clang-like and MSVC toolchains.Gravatar Abseil Team2022-10-07
| | | | | PiperOrigin-RevId: 479614832 Change-Id: I440d145172c93cc4043aeda36898877a331ed5ff
* Merge pull request #1289 from keith:ks/fix-more-clang-deprecated-builtinsGravatar Copybara-Service2022-10-06
|\ | | | | | | | | PiperOrigin-RevId: 479321649 Change-Id: Icc3eba76fc17272fb1e9b1da2216394971a3d3ae
| * Fix more clang deprecated builtinsGravatar Keith Smiley2022-10-04
|/ | | | | | | | | If you compile with clang 15+, the uses of trivially destructible and assignable are deprecated. This sets this configuration correctly as the ifdef to fix the build. Fixes https://github.com/abseil/abseil-cpp/issues/1201 Related https://github.com/abseil/abseil-cpp/pull/1277
* Removes the legacy spellings of the thread annotation macros/functionsGravatar Derek Mauro2022-10-03
| | | | | | | | | | | | | | | | by default. The compatibility macro `ABSL_LEGACY_THREAD_ANNOTATIONS` can be defined on the compile command-line to temporarily restore these spellings. All of the thread annotation macros are available under ABSL_ prefixed spellings in `absl/base/thread_annotations.h`. The compatibility macro and the legacy spellings will be removed in the future. See https://github.com/google/fuzztest/issues/41 PiperOrigin-RevId: 478498273 Change-Id: I120ad6480d031642bf95a11bf72ab883d9161810
* `absl::base_internal::ReadLongFromFile` should use `O_CLOEXEC` and handle ↵Gravatar Abseil Team2022-09-28
| | | | | | | interrupts to `read` PiperOrigin-RevId: 477547252 Change-Id: Icc94290511b5071d15584d59dcd9cf6ad7319e2b
* Split configuration related to cycle clock into separate headersGravatar Abseil Team2022-09-26
| | | | | PiperOrigin-RevId: 477043101 Change-Id: I009ea39ad61e7e78cdac51afc57a8ad5b4d8aa2d
* Change the macro ABSL_IS_TRIVIALLY_RELOCATABLE into a type trait - ↵Gravatar Evan Brown2022-09-20
| | | | | | | | | | | | | | | | | | | | | | absl::is_trivially_relocatable - and move it from optimization.h to type_traits.h. Example of how to change to the new type trait: ``` #include "absl/base/attributes.h" if (ABSL_IS_TRIVIALLY_RELOCATABLE(T)) { DoSomething(); } ``` to ``` #include "absl/meta/type_traits.h" if (absl::is_trivially_relocatable<T>::value) { DoSomething(); } ``` Note that optimization.h is also built in C mode so we can't put a type trait there. PiperOrigin-RevId: 475633715 Change-Id: I2bc85f3f6711d1280049fd01eb97c497d2d0d929
* Fix "unsafe narrowing" warnings in absl, 8/n.Gravatar Abseil Team2022-09-12
| | | | | | | | | | | | | | | Addresses failures with the following, in some files: -Wshorten-64-to-32 -Wimplicit-int-conversion -Wsign-compare -Wsign-conversion -Wtautological-unsigned-zero-compare (This specific CL focuses on .cc files in */internal/.) Bug: chromium:1292951 PiperOrigin-RevId: 473868797 Change-Id: Ibe0b76e33f9e001d59862beaac54fb47bacd39b2
* Fix "unsafe narrowing" warnings in absl, 10/n.Gravatar Abseil Team2022-09-08
| | | | | | | | | | | | | | | Addresses failures with the following, in some files: -Wshorten-64-to-32 -Wimplicit-int-conversion -Wsign-compare -Wsign-conversion -Wtautological-unsigned-zero-compare (This specific CL focuses on tests.) Bug: chromium:1292951 PiperOrigin-RevId: 473055916 Change-Id: I40cdd6c87ba9d0a5fb2db5746cff04f14ee829c2
* Rollback of fix "unsafe narrowing" warnings in absl, 8/n.Gravatar Derek Mauro2022-09-01
| | | | | | | | | | | | | | | Addresses failures with the following, in some files: -Wshorten-64-to-32 -Wimplicit-int-conversion -Wsign-compare -Wsign-conversion -Wtautological-unsigned-zero-compare (This specific CL focuses on .cc files in */internal/.) Bug: chromium:1292951 PiperOrigin-RevId: 471561809 Change-Id: I7abd6d83706f5ca135f1ce3458192a498a6280b9
* Fix "unsafe narrowing" warnings in absl, 8/n.Gravatar Abseil Team2022-09-01
| | | | | | | | | | | | | | | Addresses failures with the following, in some files: -Wshorten-64-to-32 -Wimplicit-int-conversion -Wsign-compare -Wsign-conversion -Wtautological-unsigned-zero-compare (This specific CL focuses on .cc files in */internal/.) Bug: chromium:1292951 PiperOrigin-RevId: 471549854 Change-Id: Id685d0e4666212926f4e001b8ef4930b6a33a4cc
* Fixed header guards to match style guide conventions.Gravatar Abseil Team2022-08-31
| | | | | PiperOrigin-RevId: 471292183 Change-Id: Ic124d671dd3b0ae819f741885abb046cbf7e1add
* spinlock.h: Clean up includesGravatar Abseil Team2022-08-24
| | | | | | | | 1. Removes unused includes 2. Replaces <stdint.h> with <cstdint> PiperOrigin-RevId: 469705016 Change-Id: Ic32871be93d01436f5538c44321faad7bd2e4511
* Don't try to enable use of ARM NEON intrinsics when compiling in CUDA device ↵Gravatar Abseil Team2022-08-17
| | | | | | | mode. They are not available in that configuration, even if the host supports them. PiperOrigin-RevId: 468232254 Change-Id: I1cd26eda2962778b62135a31f477928c3bde1124
* Delete #include.Gravatar Kim Hyun2022-08-11
| | | Delete deprecated header include
* - Fix deprecated header in visual studio version 17.3.0 C++20Gravatar Hyun2022-08-10
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* Disable ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE for clang-cl.Gravatar Abseil Team2022-08-05
| | | | | | | | | The Lexan and MSVC toolchains both set _MSC_VER. The MSVC toolchain must set `ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE` and `ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE`, in order to use Abseil workarounds in the absence of these types. This is not necessary for clang-cl. This change excludes clang-cl from the predicate setting these variables. PiperOrigin-RevId: 465589196 Change-Id: I0426ec4f844aabe7cdde5c60725f6a9a6b16479f
* Map the absl::is_trivially_* functions to their std implGravatar Abseil Team2022-08-05
| | | | | | | There's no point redefining these functions if they are supported by the compiler and the version of libstdc++. Also, some of the builtins used by the absl implementation of these functions (e.g. __has_trivial_destructor) have been deprecated in Clang 15. PiperOrigin-RevId: 465554125 Change-Id: I8674c3a5270ce3c654cdf58ae7dbd9d2bda8faa5
* Fix "unsafe narrowing" warnings in absl, 2/n.Gravatar Abseil Team2022-08-01
| | | | | | | | | | | | | | | Addresses failures with the following, in some files: -Wshorten-64-to-32 -Wimplicit-int-conversion -Wsign-compare -Wsign-conversion -Wtautological-unsigned-zero-compare (This specific CL focuses on .cc files in dirs a-h.) Bug: chromium:1292951 PiperOrigin-RevId: 464541951 Change-Id: If23b63ccea8e9b730159ff1c7288e9300a40b6bd
* Fix "unsafe narrowing" warnings in absl, 1/n.Gravatar Abseil Team2022-07-28
| | | | | | | | | | | | | | | Addresses failures with the following, in some files: -Wshorten-64-to-32 -Wimplicit-int-conversion -Wsign-compare -Wsign-conversion -Wtautological-unsigned-zero-compare (This specific CL focuses on .h and win32 .inc files.) Bug: chromium:1292951 PiperOrigin-RevId: 463835431 Change-Id: If8e5f7f651d5cd96035e23e4623bdb08a7fedabe
* Add ABSL_IS_TRIVIALLY_RELOCATABLE and ABSL_ATTRIBUTE_TRIVIAL_ABI macros for ↵Gravatar Evan Brown2022-07-27
| | | | | | | use with clang's __is_trivially_relocatable and [[clang::trivial_abi]]. PiperOrigin-RevId: 463668740 Change-Id: I2d2d2f53d8184a7e4f7c848c2a5f5140c2481d72
* Renamespace absl::raw_logging_internal to absl::raw_log_internal to match ↵Gravatar Andy Getzendanner2022-07-20
| | | | | | | (upcoming) non-raw logging namespace. PiperOrigin-RevId: 462213222 Change-Id: I3b9371097b368d55cc86b6106d6dec24ce122762
* Move Abseil to C++14 minimumGravatar Derek Mauro2022-07-06
| | | | | | | | | | Adds policy checks the raise the minimum C++ version to C++14 and the minimum GCC version to GCC 5 Updates the docs to indicate the C++14 minimum. PiperOrigin-RevId: 459401288 Change-Id: I18878f0e13001c57e97e26ad7c9a9c9c12c39265
* PR #1197: absl/base/internal/direct_mmap.h: fix musl build on mipsGravatar Fabrice Fontaine2022-06-16
| | | | | | | | | | | | | | | | | | | | | | | | | Imported from GitHub PR https://github.com/abseil/abseil-cpp/pull/1197 Fix the following musl build failure on mips: ``` In file included from /nvmedata/autobuild/instance-15/output-1/build/libabseil-cpp-20211102.0/absl/base/internal/low_level_alloc.cc:26: /nvmedata/autobuild/instance-15/output-1/build/libabseil-cpp-20211102.0/absl/base/internal/direct_mmap.h:49:10: fatal error: sgidefs.h: No such file or directory 49 | #include <sgidefs.h> | ^~~~~~~~~~~ ``` Fixes: - http://autobuild.buildroot.org/results/3fa027e602bacb22316fb5d9b233baa0b0f0e845 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Merge c9b5b5c5471213a871f7d6d1d2fc8f6899effbac into a184bab83ffcffc2aaac49a3900361158ab3890f Merging this change closes #1197 COPYBARA_INTEGRATE_REVIEW=https://github.com/abseil/abseil-cpp/pull/1197 from ffontaine:master c9b5b5c5471213a871f7d6d1d2fc8f6899effbac PiperOrigin-RevId: 455467767 Change-Id: I1905f7d70e914288bc1524a52adce3476a779fd8
* absl/base/internal/invoke: Ignore bogus warnings on GCC >= 11Gravatar Dino Radakovic2022-06-16
| | | | | PiperOrigin-RevId: 455463553 Change-Id: Ifa6c238556339dd4e36715ac040ca048f2f84a9a
* Reformulate documentation of ABSL_LOCKS_EXCLUDED.Gravatar Abseil Team2022-06-10
| | | | | | | The intent of the macro is to say what locks cannot be held when calling the method, not making a promise that they will be acquired. PiperOrigin-RevId: 454158686 Change-Id: I71087460c3df27c7d6e0571156f19f525024f1de
* absl/base/internal/invoke.h: Use ABSL_INTERNAL_CPLUSPLUS_LANG for language ↵Gravatar Dino Radakovic2022-06-09
| | | | | | | version guard PiperOrigin-RevId: 453970585 Change-Id: Iac23eb88ea676efc822f001020b1cc2c255dbbc1
* Fix C++17 constexpr storage deprecation warningsGravatar Derek Mauro2022-06-09
| | | | | | | | | | | | | | | | | | | This change introduces the symbol ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL to guard redundant declarations of static constexpr data members that are needed prior to C++17. This change also introduces the symbol ABSL_INTERNAL_CPLUSPLUS_LANG, which is supposed to be set to the same value as __cplusplus, except it uses _MSVC_LANG on MSVC so that the value is correct on MSVC. Neither of these new symbols should be used outside of Abseil. Fixes #1191 PiperOrigin-RevId: 453923908 Change-Id: I1316c52c19fa0c168b93cced0c817e4cb7c9c862
* Optimize SwissMap iteration by another 5-10% for ARMGravatar Abseil Team2022-06-09
| | | | | | | | | | | | | | | | | | | https://pastebin.com/fDvgWgHe After having a chat with Dougall Johnson (https://twitter.com/dougallj/status/1534213050944802816), we realized that __clzll works with zero arguments per documentation: https://developer.arm.com/documentation/101028/0009/Data-processing-intrinsics ``` Returns the number of leading zero bits in x. When x is zero it returns the argument width, i.e. 32 or 64. ``` Codegen improves https://godbolt.org/z/ebadf717Y Thus we can use a little bit different construction not involving CLS but using more understandable CLZ and removing some operations. PiperOrigin-RevId: 453879080 Change-Id: Ie2d7f834f63364d7bd50dd6a682c107985f21942
* Remove unintended defines from config.hGravatar James Y Knight2022-06-07
| | | | | PiperOrigin-RevId: 453429588 Change-Id: Id377cd89dc807da80a33a8549f4e59bd935aff93
* Optimize SwissMap for ARM by 3-8% for all operationsGravatar Abseil Team2022-06-06
| | | | | | | | | | | https://pastebin.com/CmnzwUFN The key idea is to avoid using 16 byte NEON and use 8 byte NEON which has lower latency for BitMask::Match. Even though 16 byte NEON achieves higher throughput, in SwissMap it's very important to catch these Matches with low latency as probing on average happens at most once. I also introduced NonIterableMask as ARM has really great cbnz instructions and additional AND on scalar mask had 1 extra latency cycle PiperOrigin-RevId: 453216147 Change-Id: I842c50d323954f8383ae156491232ced55aacb78
* Merge pull request #714 from kgotlinux:patch-2Gravatar Copybara-Service2022-06-02
|\ | | | | | | | | PiperOrigin-RevId: 452619005 Change-Id: I6c120f9e7bbabe3b00821adc441608ae9118bee6
* | Include proper #includes for POSIX thread identity implementation when using ↵Gravatar Andy Getzendanner2022-06-02
| | | | | | | | | | | | | | | | | | that implementation on MinGW. Fixes #1124 PiperOrigin-RevId: 452596638 Change-Id: Iab34b8e112dc050ffe346a418fa7b499983f0dcf
* | Disable tests on some platforms where they currently fail.Gravatar Tom Rybka2022-06-02
| | | | | | | | | | PiperOrigin-RevId: 452542838 Change-Id: I45d80b220c0450d27423bb23504e95c25811877b
* | Stop using sleep timeouts for Linux futex-based SpinLockGravatar Derek Mauro2022-05-31
| | | | | | | | | | | | | | | | | | | | | | | | Timeouts were once necessary when the SpinLock Unlock used an atomic store and could therefore have a race and a missed wakeup, however, the Unlock path now uses an atomic exchange, so the missed wakeup cannot happen. Fixes #1179 PiperOrigin-RevId: 452047517 Change-Id: I844944879b51b7f7ddac148e063a376cddd0d05a
* | Enable __thread on AsyloGravatar Abseil Team2022-05-26
| | | | | | | | | | PiperOrigin-RevId: 451201387 Change-Id: Ibeac4f24d00e28bbfc61e476936d669321a2cb24
* | Add implementation of is_invocable_r to absl::base_internal for C++ < 17, ↵Gravatar Dino Radakovic2022-05-26
| | | | | | | | | | | | | | define it as alias of std::is_invocable_r when C++ >= 17 PiperOrigin-RevId: 451171660 Change-Id: I6dc0e40eabac72b82c4a19e292158e43118cb080
* | Optimize SwissMap iteration for aarch64 by 5-6%Gravatar Abseil Team2022-05-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Benchmarks: https://pastebin.com/tZ7dr67W. Works well especially on smaller ranges. After a week on spending optimizing NEON SIMD where I almost managed to make hash tables work with NEON SIMD without performance hits (still 1 cycle to optimize and I gave up a little), I found an interesting optimization for aarch64 to use cls instruction (count leading sign bits). The loop has a property that ctrl_ group is not matched against count when the first slot is empty or deleted. ``` void skip_empty_or_deleted() { while (IsEmptyOrDeleted(*ctrl_)) { uint32_t shift = Group{ctrl_}.CountLeadingEmptyOrDeleted(); ctrl_ += shift; slot_ += shift; } ... } ``` However, `kEmpty` and `kDeleted` have format of `1xxxxxx0` and `~ctrl & (ctrl >> 7)` always sets the lowest bit to 1. In naive implementation, it does +1 to start counting zero bits, however, in aarch64 we may start counting one bits immediately. This saves 1 cycle and 5% of iteration performance. Then it becomes hard to find a supported and sustainable C++ version of it. `__clsll` is not supported by GCC and was supported only since clang 8, `__builtin_clrsb` is not producing optimal codegen for clang. `__rbit` is not supported by GCC and there is no intrinsic to do that, however, in clang we have `__builtin_bitreverse{32,64}`. For now I decided to enable this only for clang, only if they have appropriate builtins. PiperOrigin-RevId: 451168570 Change-Id: I7e9256a60aecdc88ced4e6eb15ebc257281b6664
* | Don't default to the unscaled cycle clock on any Apple targets.Gravatar Tom Rybka2022-05-19
| | | | | | | | | | | | | | | | Previously was disabled on iPhone, but still enabled for macOS. The unscaled cycle clock does not work correctly when run on a VM. PiperOrigin-RevId: 449876559 Change-Id: I679ade90b43462e8d2794b1a2b32569d59029ed9
* | Use SSE instructions for prefetch when __builtin_prefetch is unavailableGravatar Derek Mauro2022-05-18
| | | | | | | | | | | | | | | | | | | | | | | | This notably gets prefetch working on MSVC Implementation note: https://docs.microsoft.com/en-us/windows/win32/api/winnt/nf-winnt-prefetchcacheline MSVC does have PreFetchCacheLine, but that would require including <windows.h> in a header PiperOrigin-RevId: 449602543 Change-Id: I5e6ca4b7c3d287779aa03c2fd348b41fb65c3680
* | Replace direct uses of __builtin_prefetch from SwissTable with the wrapper ↵Gravatar Greg Falcon2022-05-18
| | | | | | | | | | | | | | | | | | | | | | functions. Add a new (internal) feature test macro to detect whether the wrappers are no-ops on a given platform. Note that one-arg __builtin_prefetch(x) is equivalent to __builtin_prefetch(x, 0, 3), per `man BUILTIN_PREFETCH(3)` and gcc docs. PiperOrigin-RevId: 449508660 Change-Id: I144e750205eec0c956d8dd62bc72e10bdb87c4f7
* | Cast away an unused variable to play nice with -Wunused-but-set-variable.Gravatar Abseil Team2022-05-17
| | | | | | | | | | PiperOrigin-RevId: 449351955 Change-Id: Id30280107bb29f7d715327b99a2c954809513a48
* | raw_logging: Extract the inlined no-hook-registered behavior for ↵Gravatar Andy Getzendanner2022-05-17
| | | | | | | | | | | | | | LogPrefixHook to a default implementation. PiperOrigin-RevId: 449306617 Change-Id: Ia3e87d2edcae7e9874998f21a0e2ff245e48fd96
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