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Diffstat (limited to 'gpu/command_buffer/common/command_buffer.h')
-rw-r--r-- | gpu/command_buffer/common/command_buffer.h | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/gpu/command_buffer/common/command_buffer.h b/gpu/command_buffer/common/command_buffer.h deleted file mode 100644 index 3ce841a..0000000 --- a/gpu/command_buffer/common/command_buffer.h +++ /dev/null @@ -1,97 +0,0 @@ -// Copyright (c) 2006-2008 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_COMMON_COMMAND_BUFFER_H_ -#define GPU_COMMAND_BUFFER_COMMON_COMMAND_BUFFER_H_ - -#include "base/shared_memory.h" -#include "base/task.h" - -namespace command_buffer { - -// Common interface for CommandBuffer implementations. -class CommandBuffer { - public: - CommandBuffer() { - } - - virtual ~CommandBuffer() { - } - - // Initialize the command buffer with the given ring buffer. Takes ownership - // of ring buffer. - virtual bool Initialize(::base::SharedMemory* ring_buffer) = 0; - - // Gets the shared memory ring buffer object for the command buffer. - virtual ::base::SharedMemory* GetRingBuffer() = 0; - - virtual int32 GetSize() = 0; - - // The writer calls this to update its put offset. This function returns the - // reader's most recent get offset. Does not return until after the put offset - // change callback has been invoked. Returns -1 if the put offset is invalid. - virtual int32 SyncOffsets(int32 put_offset) = 0; - - // Returns the current get offset. This can be called from any thread. - virtual int32 GetGetOffset() = 0; - - // Sets the current get offset. This can be called from any thread. - virtual void SetGetOffset(int32 get_offset) = 0; - - // Returns the current put offset. This can be called from any thread. - virtual int32 GetPutOffset() = 0; - - // Sets a callback that should be posted on another thread whenever the put - // offset is changed. The callback must not return until some progress has - // been made (unless the command buffer is empty), i.e. the - // get offset must have changed. It need not process the entire command - // buffer though. This allows concurrency between the writer and the reader - // while giving the writer a means of waiting for the reader to make some - // progress before attempting to write more to the command buffer. Avoiding - // the use of a synchronization primitive like a condition variable to - // synchronize reader and writer reduces the risk of deadlock. - // Takes ownership of callback. The callback is invoked on the plugin thread. - virtual void SetPutOffsetChangeCallback(Callback0::Type* callback) = 0; - - // Create a shared memory transfer buffer and return a handle that uniquely - // identifies it or -1 on error. - virtual int32 CreateTransferBuffer(size_t size) = 0; - - // Destroy a shared memory transfer buffer and recycle the handle. - virtual void DestroyTransferBuffer(int32 id) = 0; - - // Get the shared memory associated with a handle. - virtual ::base::SharedMemory* GetTransferBuffer(int32 handle) = 0; - - // Get the current token value. This is used for by the writer to defer - // changes to shared memory objects until the reader has reached a certain - // point in the command buffer. The reader is responsible for updating the - // token value, for example in response to an asynchronous set token command - // embedded in the command buffer. The default token value is zero. - virtual int32 GetToken() = 0; - - // Allows the reader to update the current token value. - virtual void SetToken(int32 token) = 0; - - // Get the current parse error and reset it to zero. Zero means no error. Non- - // zero means error. The default error status is zero. - virtual int32 ResetParseError() = 0; - - // Allows the reader to set the current parse error. - virtual void SetParseError(int32 parse_error) = 0; - - // Returns whether the command buffer is in the error state. - virtual bool GetErrorStatus() = 0; - - // Allows the reader to set the error status. Once in an error state, the - // command buffer cannot recover and ceases to process commands. - virtual void RaiseErrorStatus() = 0; - - private: - DISALLOW_COPY_AND_ASSIGN(CommandBuffer); -}; - -} // namespace command_buffer - -#endif // GPU_COMMAND_BUFFER_COMMON_COMMAND_BUFFER_H_ |