1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
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
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.
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.
31 // Author: kenton@google.com (Kenton Varda)
32 // Based on original Protocol Buffers design by
33 // Sanjay Ghemawat, Jeff Dean, and others.
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.
41 // Core components of the Protocol Buffers runtime library.
43 // The files in this package represent the core of the Protocol Buffer
44 // system. All of them are part of the libprotobuf library.
46 // A note on thread-safety:
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.
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
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.