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95 lines
3.1 KiB
95 lines
3.1 KiB
// Copyright (C) 2019 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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#pragma once
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#include "IOStream.h"
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#include "RenderChannel.h"
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#include "base/ring_buffer.h"
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#include "host-common/address_space_graphics_types.h"
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#include <functional>
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#include <vector>
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namespace emugl {
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// An IOStream instance that can be used by the host RenderThread to process
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// messages from a pair of ring buffers (to host and from host). It also takes
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// a callback that does something when there are no available bytes to read in
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// the "to host" ring buffer.
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class RingStream final : public IOStream {
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public:
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using OnUnavailableReadCallback = std::function<int()>;
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using GetPtrAndSizeCallback =
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std::function<void(uint64_t, char**, size_t*)>;
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RingStream(
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struct asg_context context,
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android::emulation::asg::ConsumerCallbacks callbacks,
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size_t bufsize);
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~RingStream();
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int getNeededFreeTailSize() const;
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int writeFully(const void* buf, size_t len) override;
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const unsigned char *readFully( void *buf, size_t len) override;
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void printStats();
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void pausePreSnapshot() {
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mInSnapshotOperation = true;
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}
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void resume() {
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mInSnapshotOperation = false;
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}
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bool inSnapshotOperation() const {
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return mInSnapshotOperation;
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}
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protected:
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virtual void* allocBuffer(size_t minSize) override final;
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virtual int commitBuffer(size_t size) override final;
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virtual const unsigned char* readRaw(void* buf, size_t* inout_len) override final;
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virtual void* getDmaForReading(uint64_t guest_paddr) override final;
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virtual void unlockDma(uint64_t guest_paddr) override final;
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void onSave(android::base::Stream* stream) override;
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unsigned char* onLoad(android::base::Stream* stream) override;
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void type1Read(uint32_t available, char* begin, size_t* count, char** current, const char* ptrEnd);
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void type2Read(uint32_t available, size_t* count, char** current, const char* ptrEnd);
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void type3Read(uint32_t available, size_t* count, char** current, const char* ptrEnd);
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struct asg_context mContext;
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android::emulation::asg::ConsumerCallbacks mCallbacks;
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std::vector<asg_type1_xfer> mType1Xfers;
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std::vector<asg_type2_xfer> mType2Xfers;
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RenderChannel::Buffer mReadBuffer;
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RenderChannel::Buffer mWriteBuffer;
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size_t mReadBufferLeft = 0;
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size_t mXmits = 0;
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size_t mTotalRecv = 0;
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bool mBenchmarkEnabled = false;
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bool mShouldExit = false;
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bool mShouldExitForSnapshot = false;
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bool mInSnapshotOperation = false;
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};
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} // namespace emugl
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