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