-- e7f53dfbf809812e84770217777f81b6308a3084 by Abseil Team <absl-team@google.com>: Add a parameter pack to absl profile to allow profiles to separate dynamic data from static data that is available at constructor-time. Background: `inline_element_size` is effectively constant, but there is a data race between its initialization and its access. We had fixed that race by making inline_element_size atomic. This CL changes `inline_element_size` back to a non-atomic integer, and provides a way for all profiles to provide Register()-time values. PiperOrigin-RevId: 413960559 -- 70234c5943f8e37e17c1d9c54d8ed61d39880abf by Chris Kennelly <ckennelly@google.com>: Document that absl::FunctionRef does not allocate. PiperOrigin-RevId: 413946831 -- 3308ae571412c4be3cc32d088c6edac98ff2d1ed by Samuel Benzaquen <sbenza@google.com>: Internal change PiperOrigin-RevId: 413933619 -- 1617093a730d055edcf7bc04fdd6509783f5f75d by Martijn Vels <mvels@google.com>: Internal Change PiperOrigin-RevId: 413778735 -- 03ad683f059c806a6c8b04f5b79b2662c3df8c73 by Evan Brown <ezb@google.com>: Unify btree erase_if definitions and optimize them so that we only do rebalancing once per leaf node. PiperOrigin-RevId: 413757280 -- 5ba402f70801938178e486617063f01c7862525d by Martijn Vels <mvels@google.com>: Cleanup up cord sampling internals PiperOrigin-RevId: 413755011 -- 522da8f9d3e0f11630d89fb41952004742bc335a by Evan Brown <ezb@google.com>: Add b-tree benchmark for erase_if. Since this benchmark doesn't work for std:: containers before C++20, disable it for them. PiperOrigin-RevId: 413740844 -- a690ea42de8ed4a761d00235d8b2fb7548ba9732 by Andy Getzendanner <durandal@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 413735737 GitOrigin-RevId: e7f53dfbf809812e84770217777f81b6308a3084 Change-Id: I4f9f9039ba92831bc48971964aa063244c9fed72
Abseil - C++ Common Libraries
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.
Table of Contents
About Abseil
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.
Quickstart
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.
Building Abseil
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.
Support
Abseil is officially supported on many platforms. See the Abseil platform support guide for details on supported operating systems, compilers, CPUs, etc.
Codemap
Abseil contains the following C++ library components:
baseAbseil Fundamentals
Thebaselibrary contains initialization code and other code which all other Abseil code depends on. Code withinbasemay not depend on any other code (other than the C++ standard library).algorithm
Thealgorithmlibrary contains additions to the C++<algorithm>library and container-based versions of such algorithms.cleanup
Thecleanuplibrary contains the control-flow-construct-like typeabsl::Cleanupwhich is used for executing a callback on scope exit.container
Thecontainerlibrary contains additional STL-style containers, including Abseil's unordered "Swiss table" containers.debugging
Thedebugginglibrary contains code useful for enabling leak checks, and stacktrace and symbolization utilities.hash
Thehashlibrary contains the hashing framework and default hash functor implementations for hashable types in Abseil.memory
Thememorylibrary contains C++11-compatible versions ofstd::make_unique()and related memory management facilities.meta
Themetalibrary contains C++11-compatible versions of type checks available within C++14 and C++17 versions of the C++<type_traits>library.numeric
Thenumericlibrary contains C++11-compatible 128-bit integers.profiling
Theprofilinglibrary contains utility code for profiling C++ entities. It is currently a private dependency of other Abseil libraries.status
Thestatuscontains abstractions for error handling, specificallyabsl::Statusandabsl::StatusOr<T>.strings
Thestringslibrary contains a variety of strings routines and utilities, including a C++11-compatible version of the C++17std::string_viewtype.synchronization
Thesynchronizationlibrary contains concurrency primitives (Abseil'sabsl::Mutexclass, an alternative tostd::mutex) and a variety of synchronization abstractions.time
Thetimelibrary contains abstractions for computing with absolute points in time, durations of time, and formatting and parsing time within time zones.types
Thetypeslibrary contains non-container utility types, like a C++11-compatible version of the C++17std::optionaltype.utility
Theutilitylibrary contains utility and helper code.
Releases
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.
License
The Abseil C++ library is licensed under the terms of the Apache license. See LICENSE for more information.
Links
For more information about Abseil:
- Consult our Abseil Introduction
- Read Why Adopt Abseil to understand our design philosophy.
- Peruse our Abseil Compatibility Guarantees to understand both what we promise to you, and what we expect of you in return.