1 #include "configcache.h"
8 #include <boost/iostreams/filtering_streambuf.hpp>
9 #include <boost/iostreams/stream.hpp>
10 #include <boost/iostreams/filter/bzip2.hpp>
11 #include <boost/iostreams/device/array.hpp>
12 #include <boost/iostreams/copy.hpp>
14 #define HEADER_READOK 0
15 #define HEADER_READERR 1
16 #define HEADER_READLAST 2
18 struct configcache::iobuffers
20 boost::iostreams::filtering_istreambuf *in;
21 boost::iostreams::filtering_ostreambuf *out;
24 configcache::configcache(const string& cacheid, const int& nequi, const int& nskip, const string& datadir, char **configmem, const int& configMemSize, const int& cachemode,
33 if ( cacheid.find("_") != -1 ) {
34 if(log) *log << "CCACHE: Invalid cacheid \"" << cacheid << "\" given. Cacheids must not contain underscores!" << endl << flush;
38 configMem = (char*)malloc(configMemSize);
39 tmpConfig = (char*)malloc(configMemSize);
41 *configmem = configMem;
42 configSize = configMemSize;
44 ioBuffers = new iobuffers;
46 ioBuffers->out = NULL;
50 refetchDataFiles = false;
53 string configcache::getFileId(int actnequi, const bool& shortid)
57 if(!shortid) fileid << CACHEID << "_" << actnequi << "_" << NSKIP;
58 for(int ipara=0; ipara<Paras.size(); ipara++)
59 fileid << "_" << Paras[ipara].id << Paras[ipara].val;
64 void configcache::fetchDataFiles()
66 struct dirent *de=NULL;
68 static infiledesc filedesc;
70 d=opendir(DATADIR.c_str());
72 while(de = readdir(d)){
73 string filename = de->d_name;
74 if(isValidInFile(filename, &filedesc))
76 inFiles.push_back(filedesc);
82 bool configcache::isValidInFile(const string& infile, infiledesc *filedesc)
84 char *inchar, *inParts;
85 string truncIn, truncOut;
87 filedesc->filename = infile;
89 if( infile.size() < 4 ) return false;
91 if( infile.substr(infile.size()-4) == ".dat" )
92 filedesc->extended = false;
93 else if( infile.substr(infile.size()-4) == "edat" )
94 filedesc->extended = true;
98 inchar = new char [infile.size()+1];
99 strcpy (inchar, infile.c_str());
101 inParts = strtok( inchar, "_" );
102 for(int iPart=0; inParts!=NULL; iPart++)
104 if( iPart>3 ) { truncIn += "_"; truncIn += inParts; }
108 case 1: if(inParts != CACHEID)
112 filedesc->nequi = atoi(inParts);
115 if(atoi(inParts) != NSKIP)
117 filedesc->nskip = atoi(inParts);
120 inParts = strtok( NULL, "_");
122 truncIn = truncIn.substr(0, truncIn.size()-4);
126 if( truncIn.find( getFileId(NEQUI, true) + "_" ) == string::npos ) return false;
131 int configcache::readHeader()
133 long unsigned int headersize;
135 if( readDataToMem((char *)&headersize, sizeof(long unsigned int)) == sizeof(long unsigned int) && inFile.is_open() ) {
136 if ( headersize == 0 )
137 return HEADER_READLAST;
139 pair<unsigned long, void *> newHeader;
141 if( readDataToMem((char *)&newHeader.first, sizeof(unsigned long)) == sizeof(unsigned long) && inFile.is_open() ) {
142 newHeader.second = malloc(headersize);
144 if( readDataToMem((char *)newHeader.second, headersize) == headersize && inFile.is_open() ) {
145 headerStore.push_back(newHeader);
146 return HEADER_READOK;
149 if(log) *log << "CCACHE: Could not read heade-data! Closing dat-file: " << openFileDesc.filename << endl << flush;
151 return HEADER_READERR;
155 if(log) *log << "CCACHE: Could not read headerid-hash! Closing dat-file: " << openFileDesc.filename << endl << flush;
157 return HEADER_READERR;
161 if(log) *log << "CCACHE: Could not read header size. Closing dat-file: " << openFileDesc.filename << endl << flush;
163 return HEADER_READERR;
167 bool configcache::readAllHeaders()
169 int readHeaderStatus;
174 readHeaderStatus = readHeader();
176 while ( readHeaderStatus == HEADER_READOK );
178 if ( readHeaderStatus == HEADER_READLAST ) return true;
179 else if ( readHeaderStatus == HEADER_READERR ) return false;
182 void * configcache::getHeader(const string& headerid) {
183 for (vector< pair<unsigned long, void *> >::iterator headerStoreIt = headerStore.begin(); headerStoreIt != headerStore.end(); ++headerStoreIt)
184 if ( headerStoreIt->first == hash(headerid) )
185 return headerStoreIt->second;
190 void configcache::readConfig(bool *readnewconfig, int *nequileft, vector<unsigned long> *excludeFileHashes)
192 *readnewconfig = false;
194 if( DATADIR == "" || !(MODE==CACHE_MODE_RO||MODE==CACHE_MODE_RW) ) return;
196 if(refetchDataFiles){
197 refetchDataFiles = false;
203 vector<infiledesc>::iterator inFileIt = getNextInfile(excludeFileHashes);
204 int iDidVirtualSkips;
206 if( (!inFile.is_open()) && inFileIt == inFiles.end() ) {
208 *nequileft = nequileft_internal;
212 while( (!inFile.is_open()) && inFiles.size() > 0 ) {
213 openFileDesc = *inFileIt;
215 if (openFileDesc.nequi < NEQUI)
216 doVirtualEquilibration = true;
218 doVirtualEquilibration = false;
220 firstUsedConfig = true;
222 if(log) *log << "CCACHE: Opening dat-file: " << inFileIt->filename << endl << flush;
223 inFile.open( (DATADIR + "/" + inFileIt->filename).c_str(), std::ios::binary );
225 inFiles.erase(inFileIt);
227 if( !inFile.is_open() ) continue;
229 ioBuffers->in = new boost::iostreams::filtering_istreambuf;
230 ioBuffers->in->push( boost::iostreams::bzip2_decompressor() );
231 ioBuffers->in->push(inFile);
234 if( inFile.is_open() )
236 if (doVirtualEquilibration) {
237 if(log) *log << "CCACHE: Trying virtual equilibration." << endl << flush;
238 doVirtualEquilibration = false;
239 for (iDidVirtualSkips=0; iDidVirtualSkips < (NEQUI-openFileDesc.nequi)/openFileDesc.nskip; iDidVirtualSkips++) {
240 if( readFullBlock(tmpConfig, configSize) != configSize || ! inFile.is_open() )
242 else if ( (NEQUI-openFileDesc.nequi) - (iDidVirtualSkips+1)*openFileDesc.nskip < nequileft_internal ) {
243 memcpy(configMem, tmpConfig, configSize);
244 nequileft_internal = NEQUI - openFileDesc.nequi - (iDidVirtualSkips+1)*openFileDesc.nskip;
245 *readnewconfig = true;
246 firstUsedConfig = false;
251 if( readFullBlock(tmpConfig, configSize) == configSize && inFile.is_open() )
253 memcpy(configMem, tmpConfig, configSize);
254 *readnewconfig = true;
255 if (firstUsedConfig) {
256 firstUsedConfig = false;
257 if (openFileDesc.nequi < NEQUI)
258 nequileft_internal = NEQUI - openFileDesc.nequi - iDidVirtualSkips*openFileDesc.nskip;
260 nequileft_internal = NEQUI - openFileDesc.nequi;
262 nequileft_internal -= openFileDesc.nskip;
263 *nequileft = nequileft_internal;
267 if(log) *log << "CCACHE: Could not read configuration. Closing dat-file: " << openFileDesc.filename << endl << flush;
274 void configcache::openOutFile(int actnequi)
276 time_t secstamp = time(NULL);
279 outFileName << DATADIR << "/" << secstamp << "_" << getFileId(actnequi) << "_.edat.tmp";
281 outFile.open( outFileName.str().c_str(), std::ios::binary );
283 ioBuffers->out = new boost::iostreams::filtering_ostreambuf;
284 ioBuffers->out->push(boost::iostreams::bzip2_compressor());
285 ioBuffers->out->push(outFile);
288 void configcache::writeHeader(const string& headerid, const char *header, long unsigned int size, int actnequi) {
289 unsigned long headeridhash;
291 if( DATADIR == "" || !(MODE==CACHE_MODE_WO||MODE==CACHE_MODE_RW) ) return;
293 if(!outFile.is_open())
294 openOutFile(actnequi);
296 headeridhash = hash(headerid);
298 boost::iostreams::write(*ioBuffers->out, (char*)&size, sizeof(long unsigned int));
299 boost::iostreams::write(*ioBuffers->out, (char*)&headeridhash, sizeof(unsigned long));
300 boost::iostreams::write(*ioBuffers->out, header, size);
303 void configcache::writeConfig(int actnequi)
305 long unsigned int zeroheader=0;
307 if ( DATADIR == "" || !(MODE==CACHE_MODE_WO||MODE==CACHE_MODE_RW) ) return;
309 if ( ! outFile.is_open() )
310 openOutFile(actnequi);
312 boost::iostreams::write(*ioBuffers->out, (char*)&zeroheader, sizeof(long unsigned int));
314 boost::iostreams::write(*ioBuffers->out, configMem, configSize);
317 void configcache::addPara(const string& parid, const double& val){
321 Paras.push_back(newPara);
324 int configcache::getParIndex(const string& parid){
325 for(int ipara=0; ipara<Paras.size(); ipara++)
326 if(Paras[ipara].id == parid) return ipara;
329 void configcache::setPara(const string& parid, const double& value){
330 Paras[getParIndex(parid)].val = value;
333 if(ioBuffers->in != NULL) { delete ioBuffers->in; ioBuffers->in=NULL; }
337 refetchDataFiles = true;
338 nequileft_internal = NEQUI;
341 configcache::~configcache()
344 delete ioBuffers->in;
345 ioBuffers->in = NULL;
348 void configcache::finishOutFile()
350 if( ioBuffers->out != NULL )
352 delete ioBuffers->out;
353 ioBuffers->out = NULL;
356 if( outFile.is_open() )
359 rename( outFileName.str().c_str(), outFileName.str().substr(0, outFileName.str().size()-4).c_str() );
363 int configcache::readFullBlock(char *tmpData, long unsigned int dataSize)
365 /* try to read header */
366 if ( openFileDesc.extended )
367 if ( ! readAllHeaders() )
371 return readDataToMem(tmpData, dataSize);
374 int configcache::readDataToMem(char *tmpData, long unsigned int dataSize)
378 if ( dataSize == 0 ) return 0;
380 try { readturn = boost::iostreams::read(*ioBuffers->in, tmpData, dataSize); }
381 catch(boost::iostreams::bzip2_error& error) {
382 if(log) *log << "CCACHE: Caught bzip2 exception with error code: " << error.error() << endl << flush;
385 catch (std::exception const& ex) {
386 if(log) *log << "CCACHE: Caught exception: " << ex.what() << endl << flush;
390 if(log) *log << "CCACHE: Caught unknown exception while reading." << endl << flush;
397 unsigned long configcache::hash(const string& str)
399 unsigned long hash = 5381;
401 for(string::const_iterator it=str.begin();it!=str.end();it++)
402 hash = ((hash << 5) + hash) + *it; /* hash * 33 + character */
407 void configcache::deleteHeaderStore()
409 while ( headerStore.size() > 0 ) {
410 free(headerStore.back().second);
411 headerStore.pop_back();
415 vector<infiledesc>::iterator configcache::getNextInfile(vector<unsigned long> *excludeFileHashes) {
416 for (vector<infiledesc>::iterator init = inFiles.begin(); init != inFiles.end(); ++init) {
417 if (excludeFileHashes != NULL) {
418 bool excludethisfile = false;
420 for (vector<unsigned long>::iterator exit = excludeFileHashes->begin(); exit != excludeFileHashes->end(); ++exit)
421 if ( *exit == hash(init->filename) ) {
422 excludethisfile = true;
431 return inFiles.end();