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141 lines
2.7 KiB
C
141 lines
2.7 KiB
C
/* MtCoder.h -- Multi-thread Coder
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2023-04-13 : Igor Pavlov : Public domain */
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#ifndef ZIP7_INC_MT_CODER_H
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#define ZIP7_INC_MT_CODER_H
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#include "MtDec.h"
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EXTERN_C_BEGIN
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/*
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if ( defined MTCODER_USE_WRITE_THREAD) : main thread writes all data blocks to output stream
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if (not defined MTCODER_USE_WRITE_THREAD) : any coder thread can write data blocks to output stream
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*/
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/* #define MTCODER_USE_WRITE_THREAD */
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#ifndef Z7_ST
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#define MTCODER_GET_NUM_BLOCKS_FROM_THREADS(numThreads) ((numThreads) + (numThreads) / 8 + 1)
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#define MTCODER_THREADS_MAX 64
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#define MTCODER_BLOCKS_MAX (MTCODER_GET_NUM_BLOCKS_FROM_THREADS(MTCODER_THREADS_MAX) + 3)
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#else
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#define MTCODER_THREADS_MAX 1
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#define MTCODER_BLOCKS_MAX 1
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#endif
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#ifndef Z7_ST
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typedef struct
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{
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ICompressProgress vt;
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CMtProgress *mtProgress;
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UInt64 inSize;
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UInt64 outSize;
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} CMtProgressThunk;
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void MtProgressThunk_CreateVTable(CMtProgressThunk *p);
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#define MtProgressThunk_INIT(p) { (p)->inSize = 0; (p)->outSize = 0; }
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struct CMtCoder_;
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typedef struct
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{
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struct CMtCoder_ *mtCoder;
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unsigned index;
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int stop;
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Byte *inBuf;
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CAutoResetEvent startEvent;
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CThread thread;
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} CMtCoderThread;
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typedef struct
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{
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SRes (*Code)(void *p, unsigned coderIndex, unsigned outBufIndex,
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const Byte *src, size_t srcSize, int finished);
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SRes (*Write)(void *p, unsigned outBufIndex);
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} IMtCoderCallback2;
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typedef struct
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{
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SRes res;
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unsigned bufIndex;
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BoolInt finished;
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} CMtCoderBlock;
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typedef struct CMtCoder_
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{
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/* input variables */
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size_t blockSize; /* size of input block */
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unsigned numThreadsMax;
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UInt64 expectedDataSize;
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ISeqInStreamPtr inStream;
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const Byte *inData;
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size_t inDataSize;
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ICompressProgressPtr progress;
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ISzAllocPtr allocBig;
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IMtCoderCallback2 *mtCallback;
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void *mtCallbackObject;
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/* internal variables */
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size_t allocatedBufsSize;
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CAutoResetEvent readEvent;
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CSemaphore blocksSemaphore;
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BoolInt stopReading;
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SRes readRes;
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#ifdef MTCODER_USE_WRITE_THREAD
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CAutoResetEvent writeEvents[MTCODER_BLOCKS_MAX];
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#else
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CAutoResetEvent finishedEvent;
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SRes writeRes;
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unsigned writeIndex;
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Byte ReadyBlocks[MTCODER_BLOCKS_MAX];
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LONG numFinishedThreads;
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#endif
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unsigned numStartedThreadsLimit;
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unsigned numStartedThreads;
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unsigned numBlocksMax;
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unsigned blockIndex;
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UInt64 readProcessed;
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CCriticalSection cs;
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unsigned freeBlockHead;
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unsigned freeBlockList[MTCODER_BLOCKS_MAX];
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CMtProgress mtProgress;
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CMtCoderBlock blocks[MTCODER_BLOCKS_MAX];
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CMtCoderThread threads[MTCODER_THREADS_MAX];
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} CMtCoder;
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void MtCoder_Construct(CMtCoder *p);
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void MtCoder_Destruct(CMtCoder *p);
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SRes MtCoder_Code(CMtCoder *p);
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#endif
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EXTERN_C_END
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#endif
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