| commit | 5dd240724366295970c613ed23d0092bcf392f18 | [log] [tgz] |
|---|---|---|
| author | Abseil Team <absl-team@google.com> | Fri Apr 30 10:41:56 2021 -0700 |
| committer | Derek Mauro <dmauro@google.com> | Fri Apr 30 13:55:34 2021 -0400 |
| tree | 6f4f75dacce4a7e10f0fe354474fca849aaa446c | |
| parent | f14d5f4af12eb521a5142151d6ea3addbbed42bb [diff] |
Export of internal Abseil changes -- 60b8e77be4bab1bbd3b4c3b70054879229634511 by Derek Mauro <dmauro@google.com>: Use _MSVC_LANG for some C++ dialect checks since MSVC doesn't set __cplusplus accurately by default. https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/ See GitHub #722. PiperOrigin-RevId: 371362181 -- 5d736accdff04db0e722f377c0d79f2d3ed53263 by Martijn Vels <mvels@google.com>: Fix the estimated memory size for CordRepExternal PiperOrigin-RevId: 371350380 -- eaaa1d8a167aeca67a2aa3a098a2b61a9d72172f by Martijn Vels <mvels@google.com>: Remove flakes by not enforcing re-allocated pointers do never match original Tests that do multiple updates could end up with the original allocated pointer on a 2nd resize, so the 'EqIfPrivate' should not assume that if we do 'not' have the capacity that all following relocations will never match the original. We only care about 'pointer unchanged if private and there is capacity', trying to establish 'pointer changed at some point due to re-allocation; is pointless. PiperOrigin-RevId: 371338965 -- d1837bee6bade1902b095c1cbf64231668bb84c5 by Martijn Vels <mvels@google.com>: Undo inline of small data copy in cord This leads to a performance regression as the code is not inlined (absent hard FDO inputs), and there are no suitable tail call options. PiperOrigin-RevId: 371332332 -- 06dc64b833069efc7d18b11df607c8c22be690da by Martijn Vels <mvels@google.com>: Add final instrumentation for Cordz and remove 'old' cordz logic. This change instruments the last cord function for cordz. It removes the 'old' functions: set_tree, replace_tree, UpdateCordzStatistics and RecordMetrics. PiperOrigin-RevId: 371219909 -- a5e0be538579c603052feec03e6d9910c43ea787 by Martijn Vels <mvels@google.com>: Extend the life of CordRep* if inside a snapshot If a snapshot (potentially) includes the current CordzInfo, we need to extent the lifetime of the CordRep*, as the snapshot 'point in time' observation of the cord should ideally be preserved. PiperOrigin-RevId: 371146151 -- 74d77a89774cd6c8ecdeebee0193b294a39383d6 by Martijn Vels <mvels@google.com>: Instrument std::string consuming methods: ctor, operator=, Append and Prepend This change moves the 'steal into CordRep' logic into a separate function so we can use it directly in the ctor, operator assign and append and prepend, allowing Cordz instrumentation with the proper method attributes. The assign operator is implemented in AssignLargeString leaving the dispatch inlined in cord.h (which as a side effects also allows clean tail calls in the AssignLargeString method) PiperOrigin-RevId: 371094756 -- b39effc45266b7ce2e7f96caa3b16cb6e3acc2dd by Martijn Vels <mvels@google.com>: Add Cordz instrumentation to CordReader PiperOrigin-RevId: 370990181 GitOrigin-RevId: 60b8e77be4bab1bbd3b4c3b70054879229634511 Change-Id: I96af62e6f1a643e8b1228ae01e6c84e33706bb05
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: