Export of internal Abseil changes.
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60bc1e62580e0ff352a92c785f29550c2000447d by Xiaoyi Zhang <zhangxy@google.com>:

Import Github PR https://github.com/abseil/abseil-cpp/pull/143.

absl/synchronization/internal/kernel_timeout.h uses INFINITE macro that comes from windows.h that is included by winsock2.h that is included by absl/time/time.h. This internal header will be included by public header. It should not depend on windows.h.

PiperOrigin-RevId: 205109009

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1617f0a333a8030e4e4c0bc1eef71f4a5fe9874d by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 205101804

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8dce298b8c96c12c423943a366a4d92a554366c4 by Chris Kennelly <ckennelly@google.com>:

Define UNALIGNED_LOAD/STORE macros for UNDEFINED_BEHAVIOR_SANITIZER.

When using UBSan in trap mode (that is, without the ubsan runtime library), the
x86 macros can cause alignment errors as they assume unaligned loads/stores are
permitted.  The macros defined in the presence of
{ADDRESS,THREAD,MEMORY}_SANITIZER require the runtime library.

PiperOrigin-RevId: 205096794
GitOrigin-RevId: 60bc1e62580e0ff352a92c785f29550c2000447d
Change-Id: I65a6cc86a711796c9d3a605310d67795b9f76ce9
3 files changed
tree: 99d25b10270c1bc8fa184c3d5df8855b2deb3bbe
  1. absl/
  2. CMake/
  3. .clang-format
  4. .gitignore
  5. ABSEIL_ISSUE_TEMPLATE.md
  6. AUTHORS
  7. CMakeLists.txt
  8. CONTRIBUTING.md
  9. LICENSE
  10. LTS.md
  11. README.md
  12. WORKSPACE
README.md

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 is the official build system for Abseil, which is supported on most major platforms (Linux, Windows, MacOS, for example) and compilers. 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.

Codemap

Abseil contains the following C++ library components:

  • base Abseil Fundamentals
    The 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
    The algorithm library contains additions to the C++ <algorithm> library and container-based versions of such algorithms.
  • container
    The container library contains additional STL-style containers.
  • debugging
    The debugging library contains code useful for enabling leak checks. Future updates will add stacktrace and symbolization utilities.
  • memory
    The memory library contains C++11-compatible versions of std::make_unique() and related memory management facilities.
  • meta
    The 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
    The numeric library contains C++11-compatible 128-bit integers.
  • strings
    The 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
    The synchronization library contains concurrency primitives (Abseil's absl::Mutex class, an alternative to std::mutex) and a variety of synchronization abstractions.
  • time
    The time library contains abstractions for computing with absolute points in time, durations of time, and formatting and parsing time within time zones.
  • types
    The types library contains non-container utility types, like a C++11-compatible version of the C++17 std::optional type.

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: