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gRPC Utilities

This directory contains a collection of utility classes and functions that are used throughout the gRPC core.

Overarching Purpose

This directory provides a set of common utilities that are not specific to any particular part of gRPC. This includes things like string manipulation, data structures, and platform-specific code.

Files and Subdirectories

  • alloc.h / alloc.cc: Memory allocation utilities.
  • atomic_utils.h: Utilities for working with atomic operations.
  • backoff.h / backoff.cc: Implements exponential backoff.
  • crash.h / crash.cc: Utilities for crashing the process.
  • env.h: Functions for getting and setting environment variables.
  • fork.h / fork.cc: Functions for handling fork().
  • host_port.h / host_port.cc: Utilities for joining and splitting host and port strings.
  • json/: A JSON parser and writer.
  • log.cc: The implementation of gpr_log.
  • orphanable.h: The Orphanable class, which is a base class for objects that can be orphaned.
  • ref_counted.h: The RefCounted class, which is a base class for reference-counted objects.
  • ref_counted_ptr.h: A smart pointer for RefCounted objects.
  • status_helper.h / status_helper.cc: Utilities for creating grpc_status_code and grpc_slice instances.
  • string.h / string.cc: String manipulation functions.
  • sync.h / sync.cc: Synchronization primitives.
  • time.h / time.cc: Time-related functions.
  • uri.h / uri.cc: A URI parser.
  • work_serializer.h / work_serializer.cc: A class that serializes callbacks so that only one runs at a time, in order.

Notes

  • This directory contains a lot of code, much of which is highly specialized.
  • When looking for a particular utility, it is often helpful to search for the relevant keywords in this directory.
  • The code in this directory is generally well-documented, so it is often possible to understand what a particular utility does by reading the comments in the header file.
  • README.md in this directory also has useful information.