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// Copyright 2014 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_SYSTEM_SHARED_BUFFER_DISPATCHER_H_
#define MOJO_SYSTEM_SHARED_BUFFER_DISPATCHER_H_
#include "base/macros.h"
#include "mojo/system/raw_shared_buffer.h"
#include "mojo/system/simple_dispatcher.h"
#include "mojo/system/system_impl_export.h"
namespace mojo {
namespace system {
// TODO(vtl): We derive from SimpleDispatcher, even though we don't currently
// have anything that's waitable. I want to add a "transferrable" wait flag.
class MOJO_SYSTEM_IMPL_EXPORT SharedBufferDispatcher : public SimpleDispatcher {
public:
// Validates and/or sets default options. 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) |MojoCreateSharedBufferOptions| and will be entirely
// overwritten on success (it may be partly overwritten on failure).
static MojoResult ValidateOptions(
const MojoCreateSharedBufferOptions* in_options,
MojoCreateSharedBufferOptions* out_options);
// Static factory method: |validated_options| must be validated (obviously).
// On failure, |*result| will be left as-is.
static MojoResult Create(
const MojoCreateSharedBufferOptions& validated_options,
uint64_t num_bytes,
scoped_refptr<SharedBufferDispatcher>* result);
// |Dispatcher| public methods:
virtual Type GetType() const OVERRIDE;
private:
explicit SharedBufferDispatcher(
scoped_refptr<RawSharedBuffer> shared_buffer_);
virtual ~SharedBufferDispatcher();
// |Dispatcher| protected methods:
virtual void CloseImplNoLock() OVERRIDE;
virtual scoped_refptr<Dispatcher>
CreateEquivalentDispatcherAndCloseImplNoLock() OVERRIDE;
virtual MojoResult DuplicateBufferHandleImplNoLock(
const MojoDuplicateBufferHandleOptions* options,
scoped_refptr<Dispatcher>* new_dispatcher) OVERRIDE;
virtual MojoResult MapBufferImplNoLock(
uint64_t offset,
uint64_t num_bytes,
MojoMapBufferFlags flags,
scoped_ptr<RawSharedBufferMapping>* mapping) OVERRIDE;
// |SimpleDispatcher| methods:
virtual MojoWaitFlags SatisfiedFlagsNoLock() const OVERRIDE;
virtual MojoWaitFlags SatisfiableFlagsNoLock() const OVERRIDE;
scoped_refptr<RawSharedBuffer> shared_buffer_;
DISALLOW_COPY_AND_ASSIGN(SharedBufferDispatcher);
};
} // namespace system
} // namespace mojo
#endif // MOJO_SYSTEM_SHARED_BUFFER_DISPATCHER_H_
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