| // 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_WAITER_LIST_H_ |
| #define MOJO_EDK_SYSTEM_WAITER_LIST_H_ |
| |
| #include <stdint.h> |
| |
| #include <list> |
| |
| #include "base/macros.h" |
| #include "mojo/edk/system/system_impl_export.h" |
| #include "mojo/public/c/system/types.h" |
| |
| namespace mojo { |
| namespace system { |
| |
| class Waiter; |
| struct HandleSignalsState; |
| |
| // |WaiterList| tracks all the |Waiter|s that are waiting on a given |
| // handle/|Dispatcher|. There should be a |WaiterList| for each handle that can |
| // be waited on (in any way). In the simple case, the |WaiterList| is owned by |
| // the |Dispatcher|, whereas in more complex cases it is owned by the secondary |
| // object (see simple_dispatcher.* and the explanatory comment in core.cc). This |
| // class is thread-unsafe (all concurrent access must be protected by some |
| // lock). |
| class MOJO_SYSTEM_IMPL_EXPORT WaiterList { |
| public: |
| WaiterList(); |
| ~WaiterList(); |
| |
| void AwakeWaitersForStateChange(const HandleSignalsState& state); |
| void CancelAllWaiters(); |
| void AddWaiter(Waiter* waiter, MojoHandleSignals signals, uint32_t context); |
| void RemoveWaiter(Waiter* waiter); |
| |
| private: |
| struct WaiterInfo { |
| WaiterInfo(Waiter* waiter, MojoHandleSignals signals, uint32_t context) |
| : waiter(waiter), signals(signals), context(context) {} |
| |
| Waiter* waiter; |
| MojoHandleSignals signals; |
| uint32_t context; |
| }; |
| typedef std::list<WaiterInfo> WaiterInfoList; |
| |
| WaiterInfoList waiters_; |
| |
| DISALLOW_COPY_AND_ASSIGN(WaiterList); |
| }; |
| |
| } // namespace system |
| } // namespace mojo |
| |
| #endif // MOJO_EDK_SYSTEM_WAITER_LIST_H_ |