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// Copyright 2013 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_AWAKABLE_H_
#define MOJO_EDK_SYSTEM_AWAKABLE_H_
#include <stdint.h>
#include "mojo/edk/system/system_impl_export.h"
#include "mojo/public/c/system/types.h"
namespace mojo {
namespace edk {
// An interface that may be waited on |AwakableList|.
class MOJO_SYSTEM_IMPL_EXPORT Awakable {
public:
// |Awake()| must satisfy the following contract:
// * As this is called from any thread, this must be thread-safe.
// * As this is called inside a lock, this must not call anything that takes
// "non-terminal" locks, i.e., those which are always safe to take.
// This should return false if this must not be called again for the same
// reason (e.g., for the same call to |AwakableList::Add()|).
virtual bool Awake(MojoResult result, uintptr_t context) = 0;
protected:
Awakable() {}
};
} // namespace edk
} // namespace mojo
#endif // MOJO_EDK_SYSTEM_AWAKABLE_H_
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