| // Copyright 2016 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 CONTENT_CHILD_MEMORY_CHILD_MEMORY_COORDINATOR_IMPL_H_ |
| #define CONTENT_CHILD_MEMORY_CHILD_MEMORY_COORDINATOR_IMPL_H_ |
| |
| #include "base/compiler_specific.h" |
| #include "base/memory/memory_coordinator_client.h" |
| #include "base/memory/memory_coordinator_proxy.h" |
| #include "content/common/child_memory_coordinator.mojom.h" |
| #include "content/common/content_export.h" |
| #include "content/common/memory_coordinator.mojom.h" |
| #include "mojo/public/cpp/bindings/binding.h" |
| |
| namespace content { |
| |
| class CONTENT_EXPORT ChildMemoryCoordinatorDelegate { |
| public: |
| virtual ~ChildMemoryCoordinatorDelegate() {} |
| |
| // Called when the system requests immediate actions to free memory. |
| virtual void OnTrimMemoryImmediately() = 0; |
| }; |
| |
| // ChildMemoryCoordinatorImpl is the implementation of ChildMemoryCoordinator. |
| // It lives in child processes and is responsible for dispatching memory events |
| // to its clients. |
| class CONTENT_EXPORT ChildMemoryCoordinatorImpl |
| : base::MemoryCoordinator, |
| public mojom::ChildMemoryCoordinator { |
| public: |
| // Returns the instance of ChildMemoryCoordinatorImpl. Could be nullptr. |
| static ChildMemoryCoordinatorImpl* GetInstance(); |
| |
| ChildMemoryCoordinatorImpl(mojom::MemoryCoordinatorHandlePtr parent, |
| ChildMemoryCoordinatorDelegate* delegate); |
| ~ChildMemoryCoordinatorImpl() override; |
| |
| // base::MemoryCoordinator implementations: |
| base::MemoryState GetCurrentMemoryState() const override; |
| |
| // mojom::ChildMemoryCoordinator implementations: |
| void OnStateChange(mojom::MemoryState state) override; |
| void PurgeMemory() override; |
| |
| protected: |
| ChildMemoryCoordinatorDelegate* delegate() { return delegate_; } |
| |
| private: |
| friend class ChildMemoryCoordinatorImplTest; |
| |
| mojo::Binding<mojom::ChildMemoryCoordinator> binding_; |
| base::MemoryState current_state_ = base::MemoryState::NORMAL; |
| mojom::MemoryCoordinatorHandlePtr parent_; |
| ChildMemoryCoordinatorDelegate* delegate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ChildMemoryCoordinatorImpl); |
| }; |
| |
| // Factory function for creating a ChildMemoryCoordinator for the current |
| // platform. Doesn't take the ownership of |delegate|. |
| CONTENT_EXPORT std::unique_ptr<ChildMemoryCoordinatorImpl> |
| CreateChildMemoryCoordinator(mojom::MemoryCoordinatorHandlePtr parent, |
| ChildMemoryCoordinatorDelegate* delegate); |
| |
| } // namespace content |
| |
| #endif // CONTENT_CHILD_MEMORY_CHILD_MEMORY_COORDINATOR_IMPL_H_ |