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106 lines
2.9 KiB
106 lines
2.9 KiB
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __ADDRESS_SPACE_STREAM_H
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#define __ADDRESS_SPACE_STREAM_H
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#include "IOStream.h"
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#include "address_space_graphics_types.h"
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#include "goldfish_address_space.h"
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class AddressSpaceStream;
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AddressSpaceStream* createAddressSpaceStream(size_t bufSize);
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AddressSpaceStream* createVirtioGpuAddressSpaceStream(size_t bufSize);
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class AddressSpaceStream : public IOStream {
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public:
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explicit AddressSpaceStream(
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address_space_handle_t handle,
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uint32_t version,
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struct asg_context context,
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uint64_t ringOffset,
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uint64_t writeBufferOffset,
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bool virtioMode,
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struct address_space_ops ops);
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~AddressSpaceStream();
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virtual size_t idealAllocSize(size_t len);
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virtual void *allocBuffer(size_t minSize);
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virtual int commitBuffer(size_t size);
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virtual const unsigned char *readFully( void *buf, size_t len);
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virtual const unsigned char *read( void *buf, size_t *inout_len);
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virtual int writeFully(const void *buf, size_t len);
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virtual int writeFullyAsync(const void *buf, size_t len);
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virtual const unsigned char *commitBufferAndReadFully(size_t size, void *buf, size_t len);
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int getRendernodeFd() const {
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#if defined(__Fuchsia__)
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return -1;
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#else
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if (!m_virtioMode) return -1;
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return m_handle;
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#endif
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}
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private:
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bool isInError() const;
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ssize_t speculativeRead(unsigned char* readBuffer, size_t trySize);
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void notifyAvailable();
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uint32_t getRelativeBufferPos(uint32_t pos);
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void advanceWrite();
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void ensureConsumerFinishing();
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void ensureType1Finished();
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void ensureType3Finished();
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int type1Write(uint32_t offset, size_t size);
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void backoff();
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void resetBackoff();
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bool m_virtioMode;
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struct address_space_ops m_ops;
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unsigned char* m_tmpBuf;
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size_t m_tmpBufSize;
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size_t m_tmpBufXferSize;
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bool m_usingTmpBuf;
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unsigned char* m_readBuf;
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size_t m_read;
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size_t m_readLeft;
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address_space_handle_t m_handle;
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uint32_t m_version;
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struct asg_context m_context;
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uint64_t m_ringOffset;
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uint64_t m_writeBufferOffset;
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uint32_t m_writeBufferSize;
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uint32_t m_writeBufferMask;
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unsigned char* m_buf;
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unsigned char* m_writeStart;
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uint32_t m_writeStep;
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uint32_t m_notifs;
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uint32_t m_written;
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uint64_t m_backoffIters;
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uint64_t m_backoffFactor;
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};
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#endif
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