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author | kenton@google.com <kenton@google.com@630680e5-0e50-0410-840e-4b1c322b438d> | 2009-12-18 04:51:42 +0000 |
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committer | kenton@google.com <kenton@google.com@630680e5-0e50-0410-840e-4b1c322b438d> | 2009-12-18 04:51:42 +0000 |
commit | 5e744ff9612da1add0dd0f893242703246c00d0c (patch) | |
tree | 58277ba79a526fe8d3ad20eb85b67463257f48ba /src/google/protobuf/compiler/subprocess.h | |
parent | afd32abb752b84590f65437a9e297bb431f02591 (diff) |
Commit missing files from r251. Sigh.
Diffstat (limited to 'src/google/protobuf/compiler/subprocess.h')
-rw-r--r-- | src/google/protobuf/compiler/subprocess.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/subprocess.h b/src/google/protobuf/compiler/subprocess.h new file mode 100644 index 00000000..d7e6ed58 --- /dev/null +++ b/src/google/protobuf/compiler/subprocess.h @@ -0,0 +1,85 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// http://code.google.com/p/protobuf/ +// +// 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__ + +#include <vector> +#include <string> +#include <sys/types.h> +#include <unistd.h> +#include <google/protobuf/stubs/common.h> + + +namespace google { +namespace protobuf { + +class Message; + +namespace compiler { + +// Utility class for launching sub-processes. +class 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); + + private: + 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_; +}; + +} // namespace compiler +} // namespace protobuf + +} // namespace google +#endif // GOOGLE_PROTOBUF_COMPILER_SUBPROCESS_H__ |