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compress_parallel.cpp
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compress_parallel.cpp
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// compress_parallel.cpp
// parallel compress for HDiffz
/*
The MIT License (MIT)
Copyright (c) 2019 HouSisong
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/
#include "compress_parallel.h"
#if (_IS_USED_MULTITHREAD)
#include <stdio.h>
#include <exception>
#include <vector>
#include "libParallel/parallel_channel.h"
#include "libHDiffPatch/HDiff/private_diff/mem_buf.h"
#ifdef __cplusplus
extern "C" {
#endif
struct TWorkBuf{
struct TWorkBuf* next;
hpatch_StreamPos_t workIndex;
size_t dictSize;
size_t uncompressedSize;
size_t compressedSize;
unsigned char buf[1];
};
#ifdef __cplusplus
}
#endif
struct TDict{
unsigned char* buf;
size_t size;
};
struct TBlockCompressor {
hdiff_compressBlockHandle handle;
inline explicit TBlockCompressor():handle(0) { }
inline ~TBlockCompressor() { if ((_pc!=0)&&(handle!=0)) _pc->closeBlockCompressor(_pc,handle); }
inline void open(hdiff_TParallelCompress* pc){
_pc=pc;
handle=pc->openBlockCompressor(pc);
if (handle==0) throw std::runtime_error("parallel_compress_blocks() openBlockCompressor() error!");
}
hdiff_TParallelCompress* _pc;
};
struct TMt:public TMtByChannel{
hdiff_TParallelCompress* pc;
size_t blockDictSize;
size_t blockSize;
size_t threadMemSize;
const hpatch_TStreamOutput* out_code;
const hpatch_TStreamInput* in_data;
hpatch_StreamPos_t blockCount;
hpatch_StreamPos_t outCodePos;
hpatch_StreamPos_t curReadBlockIndex;
hpatch_StreamPos_t curWriteBlockIndex;
std::vector<TBlockCompressor> blockCompressors;
CHLocker readLocker;
CHLocker writeLocker;
TDict dict;
TWorkBuf* dataBufList;
};
void _threadRunCallBack(int threadIndex,void* _workData){
#define _check_br(value){ \
if (!(value)) { LOG_ERR("parallel_compress_blocks() check "#value" error!\n"); \
mt.on_error(); break; } }
TMt& mt=*(TMt*)_workData;
hdiff_compressBlockHandle cbhandle=mt.blockCompressors[threadIndex].handle;
TMtByChannel::TAutoThreadEnd __auto_thread_end(mt);
while (true) {
TWorkBuf* workBuf=(TWorkBuf*)mt.work_chan.accept(true);
if (workBuf==0) break; //finish
unsigned char* dictBufEnd;
unsigned char* dataBufEnd;
{//read data
CAutoLocker _autoLoker(mt.readLocker.locker);
if (mt.curReadBlockIndex>=mt.blockCount) break;
workBuf->dictSize=mt.dict.size;
memcpy(workBuf->buf,mt.dict.buf,mt.dict.size);
const hpatch_StreamPos_t inDataPos=mt.curReadBlockIndex*mt.blockSize;
if (mt.curReadBlockIndex+1<mt.blockCount)
workBuf->uncompressedSize=mt.blockSize;
else
workBuf->uncompressedSize=(size_t)(mt.in_data->streamSize-inDataPos);
dictBufEnd=workBuf->buf+workBuf->dictSize;
dataBufEnd=dictBufEnd+workBuf->uncompressedSize;
_check_br(mt.in_data->read(mt.in_data,inDataPos,dictBufEnd,dataBufEnd));
workBuf->workIndex=mt.curReadBlockIndex;
++mt.curReadBlockIndex;
if (mt.curReadBlockIndex<mt.blockCount){//update dict
if (workBuf->uncompressedSize+workBuf->dictSize>=mt.blockDictSize)
mt.dict.size=mt.blockDictSize;
else
mt.dict.size=workBuf->uncompressedSize+workBuf->dictSize;
memcpy(mt.dict.buf,dataBufEnd-mt.dict.size,mt.dict.size);
}
}
//compress
workBuf->compressedSize=mt.pc->compressBlock(mt.pc,cbhandle,workBuf->workIndex,mt.blockCount,
dataBufEnd,workBuf->buf+mt.threadMemSize,
workBuf->buf,dictBufEnd,dataBufEnd);
_check_br(workBuf->compressedSize>0);
{//write or push
CAutoLocker _autoLoker(mt.writeLocker.locker);
//push to list
TWorkBuf** insertBuf=&mt.dataBufList;
while ((*insertBuf)&&((*insertBuf)->workIndex<workBuf->workIndex))
insertBuf=&((*insertBuf)->next);
workBuf->next=*insertBuf;
*insertBuf=workBuf;
//write
while (mt.dataBufList&&(mt.dataBufList->workIndex==mt.curWriteBlockIndex)){
//pop from list
workBuf=mt.dataBufList;
mt.dataBufList=mt.dataBufList->next;
//write
const unsigned char* codeBuf=workBuf->buf+workBuf->dictSize+workBuf->uncompressedSize;
_check_br(mt.out_code->write(mt.out_code,mt.outCodePos,codeBuf,codeBuf+workBuf->compressedSize));
mt.outCodePos+=workBuf->compressedSize;
++mt.curWriteBlockIndex;
_check_br(mt.work_chan.send(workBuf,true));
}
}
}
#undef _check_br
}
hpatch_StreamPos_t parallel_compress_blocks(hdiff_TParallelCompress* pc,
int threadNum,size_t blockDictSize,size_t blockSize,
const hpatch_TStreamOutput* out_code,
const hpatch_TStreamInput* in_data){
assert(blockSize>0);
assert(threadNum>0);
if (threadNum<1) threadNum=1;
hpatch_StreamPos_t blockCount=(in_data->streamSize+blockSize-1)/blockSize;
if ((hpatch_StreamPos_t)threadNum>blockCount) threadNum=(int)blockCount;
const size_t workBufCount=threadNum+(threadNum+2)/3;
const size_t threadMemSize=(size_t)(blockDictSize+blockSize+pc->maxCompressedSize(blockSize));
try {
hdiff_private::TAutoMem mem;
TMt workData;
workData.pc=pc;
workData.blockCount=blockCount;
workData.blockDictSize=blockDictSize;
workData.blockSize=blockSize;
workData.out_code=out_code;
workData.outCodePos=0;
workData.curReadBlockIndex=0;
workData.curWriteBlockIndex=0;
workData.in_data=in_data;
workData.threadMemSize=threadMemSize;
workData.blockCompressors.resize(threadNum);
for (int t=0; t<threadNum; ++t)
workData.blockCompressors[t].open(pc);
mem.realloc(workData.threadMemSize*workBufCount + blockDictSize);
unsigned char* pbuf=mem.data();
for (size_t i=0; i<workBufCount; ++i){
if (!workData.work_chan.send(pbuf,true))
throw std::runtime_error("parallel_compress_blocks() workData.data_chan.send() error!");
pbuf+=threadMemSize;
}
workData.dict.buf=pbuf;
workData.dict.size=0;
workData.dataBufList=0;
workData.start_threads(threadNum,_threadRunCallBack,&workData,hpatch_TRUE);
workData.wait_all_thread_end();
return workData.is_on_error()?0:workData.outCodePos;
} catch (const std::exception& e) {
LOG_ERR("parallel_compress_blocks run error! %s\n",e.what());
return 0; //error
}
}
#endif// _IS_USED_MULTITHREAD