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// 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.
#ifndef MOJO_EDK_SYSTEM_DATA_PIPE_H_
#define MOJO_EDK_SYSTEM_DATA_PIPE_H_
#include <stddef.h>
#include "base/compiler_specific.h"
#include "mojo/edk/embedder/platform_handle_vector.h"
#include "mojo/edk/embedder/scoped_platform_handle.h"
#include "mojo/edk/system/system_impl_export.h"
#include "mojo/public/c/system/data_pipe.h"
#include "mojo/public/c/system/types.h"
#include "mojo/public/cpp/system/macros.h"
namespace mojo {
namespace edk {
class RawChannel;
// Shared code between DataPipeConsumerDispatcher and
// DataPipeProducerDispatcher.
class MOJO_SYSTEM_IMPL_EXPORT DataPipe {
public:
// The default options for |MojoCreateDataPipe()|. (Real uses should obtain
// this via |ValidateCreateOptions()| with a null |in_options|; this is
// exposed directly for testing convenience.)
static MojoCreateDataPipeOptions GetDefaultCreateOptions();
// Validates and/or sets default options for |MojoCreateDataPipeOptions|. If
// non-null, |in_options| must point to a struct of at least
// |in_options->struct_size| bytes. |out_options| must point to a (current)
// |MojoCreateDataPipeOptions| and will be entirely overwritten on success (it
// may be partly overwritten on failure).
static MojoResult ValidateCreateOptions(
const MojoCreateDataPipeOptions* in_options,
MojoCreateDataPipeOptions* out_options);
// Helper methods used by DataPipeConsumerDispatcher and
// DataPipeProducerDispatcher for serialization and deserialization.
static void StartSerialize(bool have_channel_handle,
bool have_shared_memory,
size_t* max_size,
size_t* max_platform_handles);
static void EndSerialize(const MojoCreateDataPipeOptions& options,
ScopedPlatformHandle channel_handle,
ScopedPlatformHandle shared_memory_handle,
size_t shared_memory_size,
void* destination,
size_t* actual_size,
PlatformHandleVector* platform_handles);
static ScopedPlatformHandle Deserialize(
const void* source,
size_t size,
PlatformHandleVector* platform_handles,
MojoCreateDataPipeOptions* options,
ScopedPlatformHandle* shared_memory_handle,
size_t* shared_memory_size);
};
} // namespace edk
} // namespace mojo
#endif // MOJO_EDK_SYSTEM_DATA_PIPE_H_
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