Implement MojoGetBufferInformation(), part 3.

mojo/edk/embedder/system_impl_private_entrypoints.cc

 // Copyright 2015 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 "base/logging.h"
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/system/core.h"
 #include "mojo/edk/system/dispatcher.h"
 #include "mojo/edk/util/ref_ptr.h"
 #include "mojo/public/c/system/buffer.h"
@@ skipping 224 matching lines @@
     MojoSystemImpl system,
     MojoHandle buffer_handle,
     const MojoDuplicateBufferHandleOptions* options,
     MojoHandle* new_buffer_handle) {
   mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
   DCHECK(core);
   return core->DuplicateBufferHandle(buffer_handle, MakeUserPointer(options),
                                      MakeUserPointer(new_buffer_handle));
 }
 
+MojoResult MojoSystemImplGetBufferInformation(MojoSystemImpl system,
+                                              MojoHandle buffer_handle,
+                                              MojoBufferInformation* info,
+                                              uint32_t info_num_bytes) {
+  mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
+  DCHECK(core);
+  return core->GetBufferInformation(buffer_handle, MakeUserPointer(info),
+                                    info_num_bytes);
+}
+
 MojoResult MojoSystemImplMapBuffer(MojoSystemImpl system,
                                    MojoHandle buffer_handle,
                                    uint64_t offset,
                                    uint64_t num_bytes,
                                    void** buffer,
                                    MojoMapBufferFlags flags) {
   mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
   DCHECK(core);
   return core->MapBuffer(buffer_handle, offset, num_bytes,
                          MakeUserPointer(buffer), flags);
 }
 
 MojoResult MojoSystemImplUnmapBuffer(MojoSystemImpl system, void* buffer) {
   mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
   DCHECK(core);
   return core->UnmapBuffer(MakeUserPointer(buffer));
 }
 
 }  // extern "C"