| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 Google Inc. All rights reserved. |
| // https://developers.google.com/protocol-buffers/ |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // Author: kenton@google.com (Kenton Varda) |
| |
| #ifndef GOOGLE_PROTOBUF_COMPILER_SUBPROCESS_H__ |
| #define GOOGLE_PROTOBUF_COMPILER_SUBPROCESS_H__ |
| |
| #ifdef _WIN32 |
| #define WIN32_LEAN_AND_MEAN // right... |
| #include <windows.h> |
| #else // _WIN32 |
| #include <sys/types.h> |
| #include <unistd.h> |
| #endif // !_WIN32 |
| #include <google/protobuf/stubs/common.h> |
| |
| #include <string> |
| |
| |
| namespace google { |
| namespace protobuf { |
| |
| class Message; |
| |
| namespace compiler { |
| |
| // Utility class for launching sub-processes. |
| class LIBPROTOC_EXPORT Subprocess { |
| public: |
| Subprocess(); |
| ~Subprocess(); |
| |
| enum SearchMode { |
| SEARCH_PATH, // Use PATH environment variable. |
| EXACT_NAME // Program is an exact file name; don't use the PATH. |
| }; |
| |
| // Start the subprocess. Currently we don't provide a way to specify |
| // arguments as protoc plugins don't have any. |
| void Start(const string& program, SearchMode search_mode); |
| |
| // Serialize the input message and pipe it to the subprocess's stdin, then |
| // close the pipe. Meanwhile, read from the subprocess's stdout and parse |
| // the data into *output. All this is done carefully to avoid deadlocks. |
| // Returns true if successful. On any sort of error, returns false and sets |
| // *error to a description of the problem. |
| bool Communicate(const Message& input, Message* output, string* error); |
| |
| #ifdef _WIN32 |
| // Given an error code, returns a human-readable error message. This is |
| // defined here so that CommandLineInterface can share it. |
| static string Win32ErrorMessage(DWORD error_code); |
| #endif |
| |
| private: |
| #ifdef _WIN32 |
| DWORD process_start_error_; |
| HANDLE child_handle_; |
| |
| // The file handles for our end of the child's pipes. We close each and |
| // set it to NULL when no longer needed. |
| HANDLE child_stdin_; |
| HANDLE child_stdout_; |
| |
| #else // _WIN32 |
| pid_t child_pid_; |
| |
| // The file descriptors for our end of the child's pipes. We close each and |
| // set it to -1 when no longer needed. |
| int child_stdin_; |
| int child_stdout_; |
| |
| #endif // !_WIN32 |
| }; |
| |
| } // namespace compiler |
| } // namespace protobuf |
| |
| } // namespace google |
| #endif // GOOGLE_PROTOBUF_COMPILER_SUBPROCESS_H__ |