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/thirdparty/breakpad/third_party/protobuf/protobuf/src/google/protobuf/compiler/subprocess.h

http://github.com/tomahawk-player/tomahawk
C++ Header | 108 lines | 44 code | 20 blank | 44 comment | 0 complexity | c86682bf73f84daaa531b913f2bbc418 MD5 | raw file
  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
 33#ifndef GOOGLE_PROTOBUF_COMPILER_SUBPROCESS_H__
 34#define GOOGLE_PROTOBUF_COMPILER_SUBPROCESS_H__
 35
 36#ifdef _WIN32
 37#define WIN32_LEAN_AND_MEAN   // right...
 38#include <windows.h>
 39#else  // _WIN32
 40#include <sys/types.h>
 41#include <unistd.h>
 42#endif  // !_WIN32
 43#include <google/protobuf/stubs/common.h>
 44
 45#include <string>
 46
 47
 48namespace google {
 49namespace protobuf {
 50
 51class Message;
 52
 53namespace compiler {
 54
 55// Utility class for launching sub-processes.
 56class LIBPROTOC_EXPORT Subprocess {
 57 public:
 58  Subprocess();
 59  ~Subprocess();
 60
 61  enum SearchMode {
 62    SEARCH_PATH,   // Use PATH environment variable.
 63    EXACT_NAME     // Program is an exact file name; don't use the PATH.
 64  };
 65
 66  // Start the subprocess.  Currently we don't provide a way to specify
 67  // arguments as protoc plugins don't have any.
 68  void Start(const string& program, SearchMode search_mode);
 69
 70  // Serialize the input message and pipe it to the subprocess's stdin, then
 71  // close the pipe.  Meanwhile, read from the subprocess's stdout and parse
 72  // the data into *output.  All this is done carefully to avoid deadlocks.
 73  // Returns true if successful.  On any sort of error, returns false and sets
 74  // *error to a description of the problem.
 75  bool Communicate(const Message& input, Message* output, string* error);
 76
 77#ifdef _WIN32
 78  // Given an error code, returns a human-readable error message.  This is
 79  // defined here so that CommandLineInterface can share it.
 80  static string Win32ErrorMessage(DWORD error_code);
 81#endif
 82
 83 private:
 84#ifdef _WIN32
 85  DWORD process_start_error_;
 86  HANDLE child_handle_;
 87
 88  // The file handles for our end of the child's pipes.  We close each and
 89  // set it to NULL when no longer needed.
 90  HANDLE child_stdin_;
 91  HANDLE child_stdout_;
 92
 93#else  // _WIN32
 94  pid_t child_pid_;
 95
 96  // The file descriptors for our end of the child's pipes.  We close each and
 97  // set it to -1 when no longer needed.
 98  int child_stdin_;
 99  int child_stdout_;
100
101#endif  // !_WIN32
102};
103
104}  // namespace compiler
105}  // namespace protobuf
106
107}  // namespace google
108#endif  // GOOGLE_PROTOBUF_COMPILER_SUBPROCESS_H__