1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MOJO_EDK_SYSTEM_AWAKABLE_H_ 6 #define MOJO_EDK_SYSTEM_AWAKABLE_H_ 7 8 #include <stdint.h> 9 10 #include "mojo/edk/system/system_impl_export.h" 11 #include "mojo/public/c/system/types.h" 12 13 namespace mojo { 14 namespace edk { 15 16 // An interface that may be waited on |AwakableList|. 17 class MOJO_SYSTEM_IMPL_EXPORT Awakable { 18 public: 19 // |Awake()| must satisfy the following contract: 20 // * As this is called from any thread, this must be thread-safe. 21 // * As this is called inside a lock, this must not call anything that takes 22 // "non-terminal" locks, i.e., those which are always safe to take. 23 // This should return false if this must not be called again for the same 24 // reason (e.g., for the same call to |AwakableList::Add()|). 25 virtual bool Awake(MojoResult result, uintptr_t context) = 0; 26 27 protected: 28 Awakable() {} 29 }; 30 31 } // namespace edk 32 } // namespace mojo 33 34 #endif // MOJO_EDK_SYSTEM_AWAKABLE_H_ 35
