1// Protocol Buffers - Google's data interchange format 2// Copyright 2008 Google Inc. All rights reserved. 3// http://code.google.com/p/protobuf/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are 7// met: 8// 9// * Redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer. 11// * Redistributions in binary form must reproduce the above 12// copyright notice, this list of conditions and the following disclaimer 13// in the documentation and/or other materials provided with the 14// distribution. 15// * Neither the name of Google Inc. nor the names of its 16// contributors may be used to endorse or promote products derived from 17// this software without specific prior written permission. 18// 19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31// Author: kenton@google.com (Kenton Varda) 32// Based on original Protocol Buffers design by 33// Sanjay Ghemawat, Jeff Dean, and others. 34// 35// This file exists solely to document the google::protobuf namespace. 36// It is not compiled into anything, but it may be read by an automated 37// documentation generator. 38 39namespace google { 40 41// Core components of the Protocol Buffers runtime library. 42// 43// The files in this package represent the core of the Protocol Buffer 44// system. All of them are part of the libprotobuf library. 45// 46// A note on thread-safety: 47// 48// Thread-safety in the Protocol Buffer library follows a simple rule: 49// unless explicitly noted otherwise, it is always safe to use an object 50// from multiple threads simultaneously as long as the object is declared 51// const in all threads (or, it is only used in ways that would be allowed 52// if it were declared const). However, if an object is accessed in one 53// thread in a way that would not be allowed if it were const, then it is 54// not safe to access that object in any other thread simultaneously. 55// 56// Put simply, read-only access to an object can happen in multiple threads 57// simultaneously, but write access can only happen in a single thread at 58// a time. 59// 60// The implementation does contain some "const" methods which actually modify 61// the object behind the scenes -- e.g., to cache results -- but in these cases 62// mutex locking is used to make the access thread-safe. 63namespace protobuf {} 64} // namespace google 65