#include <time.h>
#include <dirent.h>
+#define HEADER_READOK 0
+#define HEADER_READERR 1
+#define HEADER_READLAST 2
+
configcache::configcache(const string& cacheid, const int& nequi, const int& nskip, const string& datadir, char **configmem, const int& configMemSize, const int& cachemode,
- writeout *out_a){
- out = out_a;
+ ostream *_log){
+ log = _log;
NEQUI = nequi;
NSKIP = nskip;
{
struct dirent *de=NULL;
DIR *d=NULL;
+ static infiledesc filedesc;
d=opendir(DATADIR.c_str());
if(d != NULL){
while(de = readdir(d)){
string filename = de->d_name;
- if(isValidInFile(filename))
+ if(isValidInFile(filename, &filedesc))
{
- inFiles.push_back(filename);
+ inFiles.push_back(filedesc);
}
}
}
}
-bool configcache::isValidInFile(const string& infile)
+bool configcache::isValidInFile(const string& infile, infiledesc *filedesc)
{
char *inchar, *inParts;
string truncIn, truncOut;
+ filedesc->filename = infile;
+ filedesc->doVirtualEquilibration = false;
+
if( infile.size() < 4 ) return false;
- if( infile.substr(infile.size()-3) != "dat" ) return false;
+ if( infile.substr(infile.size()-4) == ".dat" )
+ filedesc->extended = false;
+ else if( infile.substr(infile.size()-4) == "edat" )
+ filedesc->extended = true;
+ else
+ return false;
inchar = new char [infile.size()+1];
strcpy (inchar, infile.c_str());
switch(iPart)
{
case 1: if(inParts != CACHEID) return false; break;
- case 2: if(atoi(inParts) != NEQUI) return false; break;
- case 3: if(atoi(inParts) != NSKIP) return false; break;
+ case 2:
+ if (atoi(inParts) > NEQUI)
+ return false;
+ else if (atoi(inParts) < NEQUI)
+ filedesc->doVirtualEquilibration = true;
+ filedesc->nequi = atoi(inParts);
+ break;
+ case 3:
+ if(atoi(inParts) != NSKIP)
+ return false;
+ filedesc->nskip = atoi(inParts);
+ break;
}
inParts = strtok( NULL, "_");
}
return true;
}
-bool configcache::readConfig()
+int configcache::readHeader()
+{
+ long unsigned int headersize;
+
+ if( readDataToMem((char *)&headersize, sizeof(long unsigned int)) == sizeof(long unsigned int) && inFile.is_open() ) {
+ if ( headersize == 0 )
+ return HEADER_READLAST;
+
+ pair<unsigned long, void *> newHeader;
+
+ if( readDataToMem((char *)&newHeader.first, sizeof(unsigned long)) == sizeof(unsigned long) && inFile.is_open() ) {
+ newHeader.second = malloc(headersize);
+
+ if( readDataToMem((char *)newHeader.second, headersize) == headersize && inFile.is_open() ) {
+ headerStore.push_back(newHeader);
+ return HEADER_READOK;
+ }
+ else {
+ if(log) *log << "CCACHE: Could not read heade-data! Closing dat-file: " << openFileDesc.filename << endl << flush;
+ inFile.close();
+ return HEADER_READERR;
+ }
+ }
+ else {
+ if(log) *log << "CCACHE: Could not read headerid-hash! Closing dat-file: " << openFileDesc.filename << endl << flush;
+ inFile.close();
+ return HEADER_READERR;
+ }
+ }
+ else {
+ if(log) *log << "CCACHE: Could not read header size. Closing dat-file: " << openFileDesc.filename << endl << flush;
+ inFile.close();
+ return HEADER_READERR;
+ }
+}
+
+bool configcache::readAllHeaders()
+{
+ int readHeaderStatus;
+
+ deleteHeaderStore();
+
+ do {
+ readHeaderStatus = readHeader();
+ }
+ while ( readHeaderStatus == HEADER_READOK );
+
+ if ( readHeaderStatus == HEADER_READLAST ) return true;
+ else if ( readHeaderStatus == HEADER_READERR ) return false;
+}
+
+void * configcache::getHeader(const string& headerid) {
+ for (vector< pair<unsigned long, void *> >::iterator headerStoreIt = headerStore.begin(); headerStoreIt != headerStore.end(); ++headerStoreIt)
+ if ( headerStoreIt->first == hash(headerid) )
+ return headerStoreIt->second;
+
+ return NULL;
+}
+
+/* returns number of equilibration-steps left */
+int configcache::readConfig(vector<unsigned long> *excludeFileHashes)
{
- if(DATADIR == "" || MODE == CACHE_MODE_DISABLED) return false;
+ int nequileft = NEQUI;
+
+ if(DATADIR == "" || MODE == CACHE_MODE_DISABLED) return nequileft;
if(refetchDataFiles){
refetchDataFiles = false;
while(true)
{
- if( (!inFile.is_open()) && inFiles.size() == 0 ) return false;
-
- while( (!inFile.is_open()) && inFiles.size() > 0 )
- {
- if(out) *out->log << "CCACHE: Opening dat-file: " << inFiles.back() << endl << flush;
+ if( (!inFile.is_open()) && inFiles.size() == 0 ) return nequileft;
- inFile.open( (DATADIR + "/" + inFiles.back()).c_str(), std::ios::binary );
- inFiles.pop_back();
+ while( (!inFile.is_open()) && inFiles.size() > 0 ) {
+ bool excludethisfile=false;
- if( !inFile.is_open() ) continue;
+ openFileDesc = inFiles.back();
- inBuffer = new boost::iostreams::filtering_istreambuf;
- inBuffer->push( boost::iostreams::bzip2_decompressor() );
- inBuffer->push(inFile);
+ if (excludeFileHashes != NULL)
+ for (vector<unsigned long>::iterator exit = excludeFileHashes->begin(); exit != excludeFileHashes->end(); ++exit)
+ if ( *exit == hash(inFiles.back().filename) ) {
+ excludethisfile = true;
+ break;
+ }
+
+ if ( ! excludethisfile ) {
+ if(log) *log << "CCACHE: Opening dat-file: " << inFiles.back().filename << endl << flush;
+ inFile.open( (DATADIR + "/" + inFiles.back().filename).c_str(), std::ios::binary );
}
+ else
+ if(log) *log << "CCACHE: Excluded dat-file: " << inFiles.back().filename << endl << flush;
+
+ inFiles.pop_back();
+
+ if( !inFile.is_open() ) continue;
+
+ inBuffer = new boost::iostreams::filtering_istreambuf;
+ inBuffer->push( boost::iostreams::bzip2_decompressor() );
+ inBuffer->push(inFile);
+ }
if( inFile.is_open() )
{
- int readturn = -1;
- try { readturn = boost::iostreams::read(*inBuffer, tmpConfig, configSize); }
- catch (std::exception const& ex) {
- if(out) *out->log << "CCACHE: Caught exception: " << ex.what() << endl << flush;
- inFile.close();
+ if (openFileDesc.doVirtualEquilibration) {
+ if(log) *log << "CCACHE: Trying virtual equilibration." << endl << flush;
+ openFileDesc.doVirtualEquilibration = false;
+ for (int iskip=0; iskip < (NEQUI-openFileDesc.nequi)/openFileDesc.nskip; iskip++) {
+ if( readFullBlock(tmpConfig, configSize) != configSize || ! inFile.is_open() )
+ break;
+ else if ( (NEQUI-openFileDesc.nequi) - (iskip+1)*openFileDesc.nskip < nequileft ) {
+ memcpy(configMem, tmpConfig, configSize);
+ nequileft = (NEQUI-openFileDesc.nequi) - (iskip+1)*openFileDesc.nskip;
+ }
+ }
}
-
- if( readturn == configSize && inFile.is_open() )
+
+ if( readFullBlock(tmpConfig, configSize) == configSize && inFile.is_open() )
{
memcpy(configMem, tmpConfig, configSize);
- return true;
+ return -1;
}
- else inFile.close();
+ else {
+ if(log) *log << "CCACHE: Could not read configuration. Closing dat-file: " << openFileDesc.filename << endl << flush;
+ inFile.close();
+ }
}
}
}
-void configcache::writeConfig()
+void configcache::openOutFile()
{
+ time_t secstamp = time(NULL);
+
+ outFileName.str("");
+ outFileName << DATADIR << "/" << secstamp << "_" << getFileId() << "_.edat.tmp";
+
+ outFile.open( outFileName.str().c_str(), std::ios::binary );
+
+ outBuffer = new boost::iostreams::filtering_ostreambuf;
+ outBuffer->push(boost::iostreams::bzip2_compressor());
+ outBuffer->push(outFile);
+}
+
+void configcache::writeHeader(const string& headerid, const char *header, long unsigned int size) {
+ unsigned long headeridhash;
+
if( DATADIR == "" || MODE < 2 ) return;
- if(!outFile.is_open()){
- time_t secstamp = time(NULL);
+ if(!outFile.is_open())
+ openOutFile();
- outFileName.str("");
- outFileName << DATADIR << "/" << secstamp << "_" << getFileId() << "_.dat.tmp";
- outFile.open( outFileName.str().c_str(), std::ios::binary );
+ headeridhash = hash(headerid);
- outBuffer = new boost::iostreams::filtering_ostreambuf;
- outBuffer->push(boost::iostreams::bzip2_compressor());
- outBuffer->push(outFile);
- }
+ boost::iostreams::write(*outBuffer, (char*)&size, sizeof(long unsigned int));
+ boost::iostreams::write(*outBuffer, (char*)&headeridhash, sizeof(unsigned long));
+ boost::iostreams::write(*outBuffer, header, size);
+}
+
+void configcache::writeConfig()
+{
+ long unsigned int zeroheader=0;
+
+ if ( DATADIR == "" || MODE < 2 ) return;
+
+ if ( ! outFile.is_open() )
+ openOutFile();
+
+ boost::iostreams::write(*outBuffer, (char*)&zeroheader, sizeof(long unsigned int));
boost::iostreams::write(*outBuffer, configMem, configSize);
}
rename( outFileName.str().c_str(), outFileName.str().substr(0, outFileName.str().size()-4).c_str() );
}
}
+
+int configcache::readFullBlock(char *tmpData, long unsigned int dataSize)
+{
+ /* try to read header */
+ if ( openFileDesc.extended )
+ if ( ! readAllHeaders() )
+ return -1;
+
+ /* read data */
+ return readDataToMem(tmpData, dataSize);
+}
+
+int configcache::readDataToMem(char *tmpData, long unsigned int dataSize)
+{
+ int readturn = -1;
+
+ if ( dataSize == 0 ) return 0;
+
+ try { readturn = boost::iostreams::read(*inBuffer, tmpData, dataSize); }
+ catch(boost::iostreams::bzip2_error& error) {
+ if(log) *log << "CCACHE: Caught bzip2 exception with error code: " << error.error() << endl << flush;
+ inFile.close();
+ }
+ catch (std::exception const& ex) {
+ if(log) *log << "CCACHE: Caught exception: " << ex.what() << endl << flush;
+ inFile.close();
+ }
+ catch( ... ) {
+ if(log) *log << "CCACHE: Caught unknown exception while reading." << endl << flush;
+ inFile.close();
+ }
+
+ return readturn;
+}
+
+unsigned long configcache::hash(const string& str)
+{
+ unsigned long hash = 5381;
+
+ for(string::const_iterator it=str.begin();it!=str.end();it++)
+ hash = ((hash << 5) + hash) + *it; /* hash * 33 + character */
+
+ return hash;
+}
+
+void configcache::deleteHeaderStore()
+{
+ while ( headerStore.size() > 0 ) {
+ free(headerStore.back().second);
+ headerStore.pop_back();
+ }
+}
projects / phys / latlib.git / blobdiff