Implements JS bindings for mojo data pipe.

third_party/WebKit/Source/core/mojo/Mojo.cpp

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/mojo/Mojo.h"
 
+#include "core/mojo/MojoCreateDataPipeOptions.h"
+#include "core/mojo/MojoCreateDataPipeResult.h"
 #include "core/mojo/MojoCreateMessagePipeResult.h"
 #include "core/mojo/MojoCreateSharedBufferResult.h"
 #include "core/mojo/MojoHandle.h"
 
 namespace blink {
 
 // static
 void Mojo::createMessagePipe(MojoCreateMessagePipeResult& resultDict) {
   MojoCreateMessagePipeOptions options = {0};
   options.struct_size = sizeof(::MojoCreateMessagePipeOptions);
   options.flags = MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_NONE;
 
   mojo::ScopedMessagePipeHandle handle0, handle1;
   MojoResult result = mojo::CreateMessagePipe(&options, &handle0, &handle1);
 
   resultDict.setResult(result);
   if (result == MOJO_RESULT_OK) {
     resultDict.setHandle0(
         MojoHandle::create(mojo::ScopedHandle::From(std::move(handle0))));
     resultDict.setHandle1(
         MojoHandle::create(mojo::ScopedHandle::From(std::move(handle1))));
   }
 }
 
 // static
+void Mojo::createDataPipe(const MojoCreateDataPipeOptions& optionsDict,
+                          MojoCreateDataPipeResult& resultDict) {
+  ::MojoCreateDataPipeOptions options = {0};
+  options.struct_size = sizeof(options);
+  options.flags = MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE;
+  options.element_num_bytes = optionsDict.elementNumBytes();
+  options.capacity_num_bytes = optionsDict.capacityNumBytes();
+
+  mojo::ScopedDataPipeProducerHandle producer;
+  mojo::ScopedDataPipeConsumerHandle consumer;
+  MojoResult result = mojo::CreateDataPipe(&options, &producer, &consumer);
+  resultDict.setResult(result);
+  if (result == MOJO_RESULT_OK) {
+    resultDict.setProducer(
+        MojoHandle::create(mojo::ScopedHandle::From(std::move(producer))));
+    resultDict.setConsumer(
+        MojoHandle::create(mojo::ScopedHandle::From(std::move(consumer))));
+  }
+}
+
+// static
 void Mojo::createSharedBuffer(unsigned numBytes,
                               MojoCreateSharedBufferResult& resultDict) {
   MojoCreateSharedBufferOptions* options = nullptr;
   mojo::Handle handle;
   MojoResult result =
       MojoCreateSharedBuffer(options, numBytes, handle.mutable_value());
 
   resultDict.setResult(result);
   if (result == MOJO_RESULT_OK) {
     resultDict.setHandle(MojoHandle::create(mojo::MakeScopedHandle(handle)));
   }
 }
 
 }  // namespace blink