Index: gpu/command_buffer/client/client_discardable_manager.h |
diff --git a/gpu/command_buffer/client/client_discardable_manager.h b/gpu/command_buffer/client/client_discardable_manager.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..780b80dcf1772f4f8e329ea899580212828cdfdb |
--- /dev/null |
+++ b/gpu/command_buffer/client/client_discardable_manager.h |
@@ -0,0 +1,72 @@ |
+// Copyright (c) 2017 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 GPU_COMMAND_BUFFER_CLIENT_CLIENT_DISCARDABLE_MANAGER_H_ |
+#define GPU_COMMAND_BUFFER_CLIENT_CLIENT_DISCARDABLE_MANAGER_H_ |
+ |
+#include <map> |
+#include <queue> |
+#include <set> |
+ |
+#include "gpu/command_buffer/common/command_buffer.h" |
+#include "gpu/command_buffer/common/discardable_handle.h" |
+#include "gpu/gpu_export.h" |
+ |
+namespace gpu { |
+ |
+// ClientDiscardableManager is a helper class used by the client GLES2 |
+// implementation. Currently, this class only supports textures, but it could |
+// be extended to other types in the future. |
+// |
+// When the GLES2 impl is done with a texture (the texture is being deleted), |
+// it should call FreeTexture to allow helper memory to be reclaimed. |
+class GPU_EXPORT ClientDiscardableManager { |
+ public: |
+ ClientDiscardableManager(); |
+ ~ClientDiscardableManager(); |
+ ClientDiscardableHandle InitializeTexture(CommandBuffer* command_buffer, |
+ uint32_t texture_id); |
+ bool LockTexture(uint32_t texture_id); |
+ void FreeTexture(uint32_t texture_id); |
+ bool TextureIsValid(uint32_t texture_id) const; |
+ |
+ // Test only functions. |
+ void CheckPendingForTesting(CommandBuffer* command_buffer) { |
+ CheckPending(command_buffer); |
+ } |
+ void SetElementCountForTesting(uint32_t count) { |
+ elements_per_allocation_ = count; |
+ allocation_size_ = count * element_size_; |
+ } |
+ ClientDiscardableHandle GetHandleForTesting(uint32_t texture_id); |
+ |
+ private: |
+ void FindAllocation(CommandBuffer* command_buffer, |
+ scoped_refptr<Buffer>* buffer, |
+ int32_t* shm_id, |
+ uint32_t* offset); |
+ void ReturnAllocation(CommandBuffer* command_buffer, |
+ const ClientDiscardableHandle& handle); |
+ void CheckPending(CommandBuffer* command_buffer); |
+ |
+ private: |
+ size_t allocation_size_; |
+ size_t element_size_ = sizeof(base::subtle::Atomic32); |
+ uint32_t elements_per_allocation_ = |
+ static_cast<uint32_t>(allocation_size_ / element_size_); |
+ |
+ struct Allocation; |
+ std::vector<std::unique_ptr<Allocation>> allocations_; |
+ std::map<uint32_t, ClientDiscardableHandle> texture_handles_; |
+ |
+ // Handles that are pending service deletion, and can be re-used once |
+ // ClientDiscardableHandle::CanBeReUsed returns true. |
+ std::queue<ClientDiscardableHandle> pending_handles_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(ClientDiscardableManager); |
+}; |
+ |
+} // namespace gpu |
+ |
+#endif // GPU_COMMAND_BUFFER_CLIENT_CLIENT_DISCARDABLE_MANAGER_H_ |