Initial checkin of gRPC to third_party/

third_party/grpc/src/compiler/ruby_plugin.cc

 /*
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
  *
  * 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.
+ *
  */
 
-#ifndef WTF_SpinLock_h
-#define WTF_SpinLock_h
+// Generates Ruby gRPC service interface out of Protobuf IDL.
 
-#include "wtf/Compiler.h"
-#include "wtf/WTFExport.h"
-#include <atomic>
 #include <memory>
-#include <mutex>
 
-// DESCRIPTION
-// Spinlock is a simple spinlock class based on the standard CPU primitive of
-// atomic increment and decrement of an int at a given memory address. These are
-// intended only for very short duration locks and assume a system with multiple
-// cores. For any potentially longer wait you should be using a real lock.
+#include "src/compiler/config.h"
+#include "src/compiler/ruby_generator.h"
+#include "src/compiler/ruby_generator_helpers-inl.h"
 
-namespace WTF {
+class RubyGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
+ public:
+  RubyGrpcGenerator() {}
+  ~RubyGrpcGenerator() {}
 
-class SpinLock {
-public:
-    using Guard = std::lock_guard<SpinLock>;
-
-    ALWAYS_INLINE void lock()
-    {
-        static_assert(sizeof(m_lock) == sizeof(int), "int and m_lock are different sizes");
-        if (LIKELY(!m_lock.exchange(true, std::memory_order_acquire)))
-            return;
-        lockSlow();
+  bool Generate(const grpc::protobuf::FileDescriptor *file,
+                const grpc::string &parameter,
+                grpc::protobuf::compiler::GeneratorContext *context,
+                grpc::string *error) const {
+    grpc::string code = grpc_ruby_generator::GetServices(file);
+    if (code.size() == 0) {
+      return true;  // don't generate a file if there are no services
     }
 
-    ALWAYS_INLINE void unlock()
-    {
-        m_lock.store(false, std::memory_order_release);
+    // Get output file name.
+    grpc::string file_name;
+    if (!grpc_ruby_generator::ServicesFilename(file, &file_name)) {
+      return false;
     }
-
-private:
-    // This is called if the initial attempt to acquire the lock fails. It's
-    // slower, but has a much better scheduling and power consumption behavior.
-    WTF_EXPORT void lockSlow();
-
-    std::atomic_int m_lock;
+    std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
+        context->Open(file_name));
+    grpc::protobuf::io::CodedOutputStream coded_out(output.get());
+    coded_out.WriteRaw(code.data(), code.size());
+    return true;
+  }
 };
 
-
-} // namespace WTF
-
-using WTF::SpinLock;
-
-#endif // WTF_SpinLock_h
+int main(int argc, char *argv[]) {
+  RubyGrpcGenerator generator;
+  return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
+}