| // 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 system { |
| |
| // 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 system |
| } // namespace mojo |
| |
| #endif // MOJO_EDK_SYSTEM_AWAKABLE_H_ |