| commit | e38e1aae3866a4ae3a41ccb38d3f05618ea30ca4 | [log] [tgz] |
|---|---|---|
| author | Abseil Team <absl-team@google.com> | Thu Apr 22 04:30:35 2021 -0700 |
| committer | Dino Radaković <dinor@google.com> | Thu Apr 22 09:26:52 2021 -0700 |
| tree | 72a8ed083e3153a908a1c5fe1b3b506212c4bb14 | |
| parent | 1ae9b71c474628d60eb251a3f62967fe64151bb2 [diff] |
Export of internal Abseil changes -- 9e0df3dd23da17cd0ff75c93c1493a858032639c by Martijn Vels <mvels@google.com>: Prep work for changing Cordz instrumentation Create CordzInfo::TrackCord() and CordzInfo::MaybeTrackCord() methods on InlineData This follows a suggestion from kfm@ to move where possible Cordz logic out of Cord and Cord::InlineRep, which we can now that InlineData provides us the abstraction of Cords internal data. PiperOrigin-RevId: 369844310 -- 45f39709033bd3bc09fa1a7880a5b3c9eaa617c7 by Abseil Team <absl-team@google.com>: Fix dependence on C++20 constexpr default construction of std::atomic. PiperOrigin-RevId: 369745251 -- 195ae230963c95068406ab0e73b4e711b5f3cd62 by Martijn Vels <mvels@google.com>: Reduce the cost of 'SetCordRep()` This change inlines SetCordRep(), which is currently two stores and a branch, going forward a naked store. AssertHeld is only enforced for debug builds. The intention here is not to reduce the 'actual' (or 'self') cost of SetCordRep() as it should only be called for sampled cords, but to reduce the cost of a branch and out of line call at the call site. The compiler can now 'perfectly inline' the single branch / store. PiperOrigin-RevId: 369696265 -- d722199ed69d413994740624159ac7bd001a9219 by Martijn Vels <mvels@google.com>: Add kDefaultInit initialization This avoids double store on init PiperOrigin-RevId: 369655217 -- 3499aed79e6cc12ce36277063ec37991bba0cccd by Martijn Vels <mvels@google.com>: Introduce CordzUpdateScope PiperOrigin-RevId: 369491326 -- 325c1bc99c7d1aeca7bd1273e51a0900b6faf731 by Abseil Team <absl-team@google.com>: make unary and logical operators constexpr PiperOrigin-RevId: 369476773 -- ad3bed3dea5e5d7d281ff36ee786f802630c3728 by Martijn Vels <mvels@google.com>: Add LOCKABLE attribute to CordzInfo PiperOrigin-RevId: 369476772 GitOrigin-RevId: 9e0df3dd23da17cd0ff75c93c1493a858032639c Change-Id: I00e2859328fe8da46d2e04d3f07dfe70ec6cb1f5
The repository contains the Abseil C++ library code. Abseil is an open-source collection of C++ code (compliant to C++11) designed to augment the C++ standard library.
Abseil is an open-source collection of C++ library code designed to augment the C++ standard library. The Abseil library code is collected from Google's own C++ code base, has been extensively tested and used in production, and is the same code we depend on in our daily coding lives.
In some cases, Abseil provides pieces missing from the C++ standard; in others, Abseil provides alternatives to the standard for special needs we've found through usage in the Google code base. We denote those cases clearly within the library code we provide you.
Abseil is not meant to be a competitor to the standard library; we've just found that many of these utilities serve a purpose within our code base, and we now want to provide those resources to the C++ community as a whole.
If you want to just get started, make sure you at least run through the Abseil Quickstart. The Quickstart contains information about setting up your development environment, downloading the Abseil code, running tests, and getting a simple binary working.
Bazel and CMake are the official build systems for Abseil.
See the quickstart for more information on building Abseil using the Bazel build system.
If you require CMake support, please check the CMake build instructions and CMake Quickstart.
Abseil is officially supported on many platforms. See the Abseil platform support guide for details on supported operating systems, compilers, CPUs, etc.
Abseil contains the following C++ library components:
base Abseil Fundamentals base library contains initialization code and other code which all other Abseil code depends on. Code within base may not depend on any other code (other than the C++ standard library).algorithm algorithm library contains additions to the C++ <algorithm> library and container-based versions of such algorithms.cleanup cleanup library contains the control-flow-construct-like type absl::Cleanup which is used for executing a callback on scope exit.container container library contains additional STL-style containers, including Abseil's unordered “Swiss table” containers.debugging debugging library contains code useful for enabling leak checks, and stacktrace and symbolization utilities.hash hash library contains the hashing framework and default hash functor implementations for hashable types in Abseil.memory memory library contains C++11-compatible versions of std::make_unique() and related memory management facilities.meta meta library contains C++11-compatible versions of type checks available within C++14 and C++17 versions of the C++ <type_traits> library.numeric numeric library contains C++11-compatible 128-bit integers.status status contains abstractions for error handling, specifically absl::Status and absl::StatusOr<T>.strings strings library contains a variety of strings routines and utilities, including a C++11-compatible version of the C++17 std::string_view type.synchronization synchronization library contains concurrency primitives (Abseil's absl::Mutex class, an alternative to std::mutex) and a variety of synchronization abstractions.time time library contains abstractions for computing with absolute points in time, durations of time, and formatting and parsing time within time zones.types types library contains non-container utility types, like a C++11-compatible version of the C++17 std::optional type.utility utility library contains utility and helper code.Abseil recommends users “live-at-head” (update to the latest commit from the master branch as often as possible). However, we realize this philosophy doesn't work for every project, so we also provide Long Term Support Releases to which we backport fixes for severe bugs. See our release management document for more details.
The Abseil C++ library is licensed under the terms of the Apache license. See LICENSE for more information.
For more information about Abseil: