1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #ifndef __COMMAND_BUFFER_STAGING_STREAM_H 17 #define __COMMAND_BUFFER_STAGING_STREAM_H 18 19 #include "IOStream.h" 20 21 class CommandBufferStagingStream : public IOStream { 22 public: 23 explicit CommandBufferStagingStream(); 24 ~CommandBufferStagingStream(); 25 26 virtual size_t idealAllocSize(size_t len); 27 virtual void *allocBuffer(size_t minSize); 28 virtual int commitBuffer(size_t size); 29 virtual const unsigned char *readFully( void *buf, size_t len); 30 virtual const unsigned char *read( void *buf, size_t *inout_len); 31 virtual int writeFully(const void *buf, size_t len); 32 virtual const unsigned char *commitBufferAndReadFully(size_t size, void *buf, size_t len); 33 34 void getWritten(unsigned char** bufOut, size_t* sizeOut); 35 void reset(); 36 37 private: 38 unsigned char* m_buf; 39 size_t m_size; 40 uint32_t m_writePos; 41 }; 42 43 #endif 44