Opening cachefiles exclusively with O_EXCL.

[phys/latlib.git] / configcache.cpp

diff --git a/configcache.cpp b/configcache.cpp
index b375230174beb942e736dd2388affec9b0225059..5987789104e623233abefc0337888b390dc96b6c 100644 (file)
--- a/configcache.cpp
+++ b/configcache.cpp
@@ -4,39 +4,60 @@
 #include <iostream>
 #include <time.h>
 #include <dirent.h>
 #include <iostream>
 #include <time.h>
 #include <dirent.h>

+#include <errno.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <boost/iostreams/filtering_streambuf.hpp>
+#include <boost/iostreams/stream.hpp>
+#include <boost/iostreams/filter/bzip2.hpp>
+#include <boost/iostreams/device/array.hpp>
+#include <boost/iostreams/copy.hpp>

 
 #define HEADER_READOK   0
 #define HEADER_READERR  1
 #define HEADER_READLAST 2
 
 
 #define HEADER_READOK   0
 #define HEADER_READERR  1
 #define HEADER_READLAST 2
 

+struct configcache::iobuffers
+{
+  boost::iostreams::filtering_istreambuf *in;
+  boost::iostreams::filtering_ostreambuf *out;
+};
+

 configcache::configcache(const string& cacheid, const int& nequi, const int& nskip, const string& datadir, char **configmem, const int& configMemSize, const int& cachemode,
 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;
   DATADIR = datadir;
   CACHEID = cacheid;
 
 
   NEQUI = nequi;
   NSKIP = nskip;
   DATADIR = datadir;
   CACHEID = cacheid;
 

+  if ( cacheid.find("_") != -1 ) {
+    if(log) *log << "CCACHE: Invalid cacheid \"" << cacheid << "\" given. Cacheids must not contain underscores!" << endl << flush;
+    exit(1);
+  }
+

   configMem = (char*)malloc(configMemSize);
   tmpConfig = (char*)malloc(configMemSize);
 
   *configmem = configMem;
   configSize = configMemSize;
 
   configMem = (char*)malloc(configMemSize);
   tmpConfig = (char*)malloc(configMemSize);
 
   *configmem = configMem;
   configSize = configMemSize;
 

-  outBuffer = NULL;
-  inBuffer = NULL;
+  ioBuffers = new iobuffers;
+  ioBuffers->in = NULL;
+  ioBuffers->out = NULL;

 
   MODE = cachemode;
 
   refetchDataFiles = false;
 }
 
 
   MODE = cachemode;
 
   refetchDataFiles = false;
 }
 

-string configcache::getFileId(const bool& shortid)
+string configcache::getFileId(int actnequi, const bool& shortid)

 {
   stringstream fileid;
 
 {
   stringstream fileid;
 

-  if(!shortid) fileid << CACHEID << "_" << NEQUI << "_" << NSKIP;
+  if(!shortid) fileid << CACHEID << "_" << actnequi << "_" << NSKIP;

   for(int ipara=0; ipara<Paras.size(); ipara++)
     fileid << "_" << Paras[ipara].id << Paras[ipara].val;
 
   for(int ipara=0; ipara<Paras.size(); ipara++)
     fileid << "_" << Paras[ipara].id << Paras[ipara].val;
 


@@ -67,7 +88,6 @@ bool configcache::isValidInFile(const string& infile, infiledesc *filedesc)
   string truncIn, truncOut;
 
   filedesc->filename = infile;
   string truncIn, truncOut;
 
   filedesc->filename = infile;

-  filedesc->doVirtualEquilibration = false;

 
   if( infile.size() < 4 ) return false;
 
 
   if( infile.size() < 4 ) return false;
 


@@ -80,7 +100,7 @@ bool configcache::isValidInFile(const string& infile, infiledesc *filedesc)
 
   inchar = new char [infile.size()+1];
   strcpy (inchar, infile.c_str());
 
   inchar = new char [infile.size()+1];
   strcpy (inchar, infile.c_str());

-  
+

   inParts = strtok( inchar, "_" );
   for(int iPart=0; inParts!=NULL; iPart++)
     {
   inParts = strtok( inchar, "_" );
   for(int iPart=0; inParts!=NULL; iPart++)
     {


@@ -88,12 +108,10 @@ bool configcache::isValidInFile(const string& infile, infiledesc *filedesc)
 
       switch(iPart)
        {
 
       switch(iPart)
        {

-       case 1: if(inParts != CACHEID) return false; break;
-       case 2: 
-         if (atoi(inParts) > NEQUI) 
-           return false; 
-         else if (atoi(inParts) < NEQUI)
-           filedesc->doVirtualEquilibration = true;
+       case 1: if(inParts != CACHEID)
+           return false;
+         break;
+       case 2:

          filedesc->nequi = atoi(inParts);
          break;
        case 3: 
          filedesc->nequi = atoi(inParts);
          break;
        case 3: 


@@ -108,7 +126,7 @@ bool configcache::isValidInFile(const string& infile, infiledesc *filedesc)
 
   delete[] inchar;
 
 
   delete[] inchar;
 

-  if( truncIn.find( getFileId(true) + "_" ) == string::npos ) return false;
+  if( truncIn.find( getFileId(NEQUI, true) + "_" ) == string::npos ) return false;

 
   return true;
 }
 
   return true;
 }


@@ -131,19 +149,19 @@ int configcache::readHeader()
        return HEADER_READOK;
       }
       else {
        return HEADER_READOK;
       }
       else {

-       if(out) *out->log << "CCACHE: Could not read heade-data! Closing dat-file: " << openFileDesc.filename << endl << flush;
+       if(log) *log << "CCACHE: Could not read heade-data! Closing dat-file: " << openFileDesc.filename << endl << flush;

        inFile.close();
        return HEADER_READERR;
       }
     }
     else {
        inFile.close();
        return HEADER_READERR;
       }
     }
     else {

-      if(out) *out->log << "CCACHE: Could not read headerid-hash! Closing dat-file: " << openFileDesc.filename << endl << flush;
+      if(log) *log << "CCACHE: Could not read headerid-hash! Closing dat-file: " << openFileDesc.filename << endl << flush;

       inFile.close();
       return HEADER_READERR;
     }
   }
   else {
       inFile.close();
       return HEADER_READERR;
     }
   }
   else {

-    if(out) *out->log << "CCACHE: Could not read header size. Closing dat-file: " << openFileDesc.filename << endl << flush;
+    if(log) *log << "CCACHE: Could not read header size. Closing dat-file: " << openFileDesc.filename << endl << flush;

     inFile.close();
     return HEADER_READERR;
   }
     inFile.close();
     return HEADER_READERR;
   }


@@ -172,9 +190,11 @@ void * configcache::getHeader(const string& headerid) {
   return NULL;
 }
 
   return NULL;
 }
 

-bool configcache::readConfig(vector<string> *excludefiles)
-{   
-  if(DATADIR == "" || MODE == CACHE_MODE_DISABLED) return false;
+void configcache::readConfig(bool *readnewconfig, int *nequileft, vector<unsigned long> *excludeFileHashes)
+{
+  *readnewconfig = false;
+
+  if( DATADIR == "" || !(MODE==CACHE_MODE_RO||MODE==CACHE_MODE_RW) ) return;

 
   if(refetchDataFiles){
     refetchDataFiles = false;
 
   if(refetchDataFiles){
     refetchDataFiles = false;


@@ -183,101 +203,134 @@ bool configcache::readConfig(vector<string> *excludefiles)
 
   while(true)
     {
 
   while(true)
     {

-      if( (!inFile.is_open()) && inFiles.size() == 0 ) return false;
+      vector<infiledesc>::iterator inFileIt = getNextInfile(excludeFileHashes);
+      int iDidVirtualSkips;

 
 

-      while( (!inFile.is_open()) && inFiles.size() > 0 ) {
-       bool excludethisfile=false;
+      if( (!inFile.is_open()) && inFileIt == inFiles.end() ) {
+       if (*readnewconfig)
+         *nequileft = nequileft_internal;
+       return;
+      }

 
 

-       openFileDesc = inFiles.back();
+      while( (!inFile.is_open()) && inFiles.size() > 0 ) {
+       openFileDesc = *inFileIt;

 
 

-       if (excludefiles != NULL)
-         for (vector<string>::iterator exit = excludefiles->begin(); exit != excludefiles->end(); ++exit)
-           if ( *exit == inFiles.back().filename ) {
-             excludethisfile = true;
-             break;
-           }
-             
-       if ( ! excludethisfile ) {
-         if(out) *out->log << "CCACHE: Opening dat-file: " << inFiles.back().filename << endl << flush;
-         inFile.open( (DATADIR + "/" + inFiles.back().filename).c_str(), std::ios::binary );
-       }
+       if (openFileDesc.nequi < NEQUI)
+         doVirtualEquilibration = true;

        else
        else

-         if(out) *out->log << "CCACHE: Excluded dat-file: " << inFiles.back().filename << endl << flush;
+         doVirtualEquilibration = false;
+
+       firstUsedConfig = true;
+
+       if(log) *log << "CCACHE: Opening dat-file: " << inFileIt->filename << endl << flush;
+       inFile.open( (DATADIR + "/" + inFileIt->filename).c_str(), std::ios::binary );

        
        

-       inFiles.pop_back();
+       inFiles.erase(inFileIt);

        
        if( !inFile.is_open() ) continue;
 
        
        if( !inFile.is_open() ) continue;
 

-       inBuffer = new boost::iostreams::filtering_istreambuf;
-       inBuffer->push( boost::iostreams::bzip2_decompressor() );
-       inBuffer->push(inFile);
+       ioBuffers->in = new boost::iostreams::filtering_istreambuf;
+       ioBuffers->in->push( boost::iostreams::bzip2_decompressor() );
+       ioBuffers->in->push(inFile);

       }
 
       if( inFile.is_open() ) 
        {
       }
 
       if( inFile.is_open() ) 
        {

-         if (openFileDesc.doVirtualEquilibration) {
-           if(out) *out->log << "CCACHE: Trying virtual equilibration." << endl << flush;
-           openFileDesc.doVirtualEquilibration = false;
-           for (int iskip=0; iskip < (NEQUI-openFileDesc.nequi)/openFileDesc.nskip; iskip++) {
+         if (doVirtualEquilibration) {
+           if(log) *log << "CCACHE: Trying virtual equilibration." << endl << flush;
+           doVirtualEquilibration = false;
+           for (iDidVirtualSkips=0; iDidVirtualSkips < (NEQUI-openFileDesc.nequi)/openFileDesc.nskip; iDidVirtualSkips++) {

              if( readFullBlock(tmpConfig, configSize) != configSize || ! inFile.is_open() )
                break;
              if( readFullBlock(tmpConfig, configSize) != configSize || ! inFile.is_open() )
                break;

+             else if ( (NEQUI-openFileDesc.nequi) - (iDidVirtualSkips+1)*openFileDesc.nskip < nequileft_internal ) {
+               memcpy(configMem, tmpConfig, configSize);
+               nequileft_internal = NEQUI - openFileDesc.nequi - (iDidVirtualSkips+1)*openFileDesc.nskip;
+               *readnewconfig = true;
+               firstUsedConfig = false;
+             }

            }
          }
 
          if( readFullBlock(tmpConfig, configSize) == configSize && inFile.is_open() )
            {
              memcpy(configMem, tmpConfig, configSize);
            }
          }
 
          if( readFullBlock(tmpConfig, configSize) == configSize && inFile.is_open() )
            {
              memcpy(configMem, tmpConfig, configSize);

-             return true;
+             *readnewconfig = true;
+             if (firstUsedConfig) {
+               firstUsedConfig = false;
+               if (openFileDesc.nequi < NEQUI)
+                 nequileft_internal = NEQUI - openFileDesc.nequi - iDidVirtualSkips*openFileDesc.nskip;
+               else
+                 nequileft_internal = NEQUI - openFileDesc.nequi;
+             }
+             nequileft_internal -= openFileDesc.nskip;
+             *nequileft = nequileft_internal;
+             return;

            }
          else {
            }
          else {

-           if(out) *out->log << "CCACHE: Could not read configuration. Closing dat-file: " << openFileDesc.filename << endl << flush;
+           if(log) *log << "CCACHE: Could not read configuration. Closing dat-file: " << openFileDesc.filename << endl << flush;

            inFile.close();
          }
        }
     }
 }
 
            inFile.close();
          }
        }
     }
 }
 

-void configcache::openOutFile()
-{
+void configcache::openOutFile(int actnequi)
+{ 

   time_t secstamp = time(NULL);
   time_t secstamp = time(NULL);

+  int iseq=0;
+  
+  while (true) {
+    outFileName.str("");
+    outFileName << DATADIR << "/" << secstamp << "." << iseq << "_" << getFileId(actnequi) << "_.edat.tmp";

 
 

-  outFileName.str("");
-  outFileName << DATADIR << "/" << secstamp << "_" << getFileId() << "_.edat.tmp";
+    int tmpfd = open(outFileName.str().c_str(), O_CREAT | O_EXCL, 0644);

 
 

+    if ( tmpfd != -1 ) {
+      close(tmpfd);
+      break;
+    }
+    else if ( errno != EEXIST ) {
+      if(log) *log << "CCACHE: Could not create cachefile!" << endl << flush;
+      exit(1);
+    }
+
+    iseq++;
+  }
+  

   outFile.open( outFileName.str().c_str(), std::ios::binary );
 
   outFile.open( outFileName.str().c_str(), std::ios::binary );
 

-  outBuffer = new boost::iostreams::filtering_ostreambuf;
-  outBuffer->push(boost::iostreams::bzip2_compressor());
-  outBuffer->push(outFile);
+  ioBuffers->out = new boost::iostreams::filtering_ostreambuf;
+  ioBuffers->out->push(boost::iostreams::bzip2_compressor());
+  ioBuffers->out->push(outFile);

 }
 
 }
 

-void configcache::writeHeader(const string& headerid, const char *header, long unsigned int size) {
+void configcache::writeHeader(const string& headerid, const char *header, long unsigned int size, int actnequi) {

   unsigned long headeridhash;
 
   unsigned long headeridhash;
 

-  if( DATADIR == "" || MODE < 2 ) return;
+  if( DATADIR == "" || !(MODE==CACHE_MODE_WO||MODE==CACHE_MODE_RW) ) return;

 
   if(!outFile.is_open())
 
   if(!outFile.is_open())

-    openOutFile();
+    openOutFile(actnequi);

 
   headeridhash = hash(headerid);
 
 
   headeridhash = hash(headerid);
 

-  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);
+  boost::iostreams::write(*ioBuffers->out, (char*)&size, sizeof(long unsigned int));
+  boost::iostreams::write(*ioBuffers->out, (char*)&headeridhash, sizeof(unsigned long));
+  boost::iostreams::write(*ioBuffers->out, header, size);

 }
 
 }
 

-void configcache::writeConfig()
+void configcache::writeConfig(int actnequi)

 {
   long unsigned int zeroheader=0;
 
 {
   long unsigned int zeroheader=0;
 

-  if ( DATADIR == "" || MODE < 2 ) return;
+  if ( DATADIR == "" || !(MODE==CACHE_MODE_WO||MODE==CACHE_MODE_RW) ) return;

 
   if ( ! outFile.is_open() )
 
   if ( ! outFile.is_open() )

-    openOutFile();
+    openOutFile(actnequi);

   
   

-  boost::iostreams::write(*outBuffer, (char*)&zeroheader, sizeof(long unsigned int));
+  boost::iostreams::write(*ioBuffers->out, (char*)&zeroheader, sizeof(long unsigned int));

 
 

-  boost::iostreams::write(*outBuffer, configMem, configSize);
+  boost::iostreams::write(*ioBuffers->out, configMem, configSize);

 }
 
 void configcache::addPara(const string& parid, const double& val){
 }
 
 void configcache::addPara(const string& parid, const double& val){


@@ -294,27 +347,29 @@ int configcache::getParIndex(const string& parid){
 
 void configcache::setPara(const string& parid, const double& value){
   Paras[getParIndex(parid)].val = value;
 
 void configcache::setPara(const string& parid, const double& value){
   Paras[getParIndex(parid)].val = value;

+

   finishOutFile();
   finishOutFile();

-  if(inBuffer != NULL) { delete inBuffer; inBuffer=NULL; } 
+  if(ioBuffers->in != NULL) { delete ioBuffers->in; ioBuffers->in=NULL; } 

   inFile.close();
   inFiles.clear();
 
   refetchDataFiles = true;
   inFile.close();
   inFiles.clear();
 
   refetchDataFiles = true;

+  nequileft_internal = NEQUI;

 }
 
 configcache::~configcache()
 {
   finishOutFile();
 }
 
 configcache::~configcache()
 {
   finishOutFile();

-  delete inBuffer;
-  inBuffer = NULL;
+  delete ioBuffers->in;
+  ioBuffers->in = NULL;

 }
 
 void configcache::finishOutFile()
 {
 }
 
 void configcache::finishOutFile()
 {

-  if( outBuffer != NULL )
+  if( ioBuffers->out != NULL )

     {
     {

-      delete outBuffer;
-      outBuffer = NULL;
+      delete ioBuffers->out;
+      ioBuffers->out = NULL;

     }
 
   if( outFile.is_open() )
     }
 
   if( outFile.is_open() )


@@ -341,17 +396,17 @@ int configcache::readDataToMem(char *tmpData, long unsigned int dataSize)
 
   if ( dataSize == 0 ) return 0;
 
 
   if ( dataSize == 0 ) return 0;
 

-  try { readturn = boost::iostreams::read(*inBuffer, tmpData, dataSize); }
+  try { readturn = boost::iostreams::read(*ioBuffers->in, tmpData, dataSize); }

   catch(boost::iostreams::bzip2_error& error) { 
   catch(boost::iostreams::bzip2_error& error) { 

-    if(out) *out->log << "CCACHE: Caught bzip2 exception with error code: " << error.error() << endl << flush;
+    if(log) *log << "CCACHE: Caught bzip2 exception with error code: " << error.error() << endl << flush;

     inFile.close();
   } 
   catch (std::exception const& ex) {
     inFile.close();
   } 
   catch (std::exception const& ex) {

-    if(out) *out->log << "CCACHE: Caught exception: " << ex.what() << endl << flush;
+    if(log) *log << "CCACHE: Caught exception: " << ex.what() << endl << flush;

     inFile.close();
   }
   catch( ... ) {
     inFile.close();
   }
   catch( ... ) {

-    if(out) *out->log << "CCACHE: Caught unknown exception while reading." << endl << flush;
+    if(log) *log << "CCACHE: Caught unknown exception while reading." << endl << flush;

     inFile.close();
   }
 
     inFile.close();
   }
 


@@ -375,3 +430,22 @@ void configcache::deleteHeaderStore()
     headerStore.pop_back();
   }
 }
     headerStore.pop_back();
   }
 }

+
+vector<infiledesc>::iterator configcache::getNextInfile(vector<unsigned long> *excludeFileHashes) {
+  for (vector<infiledesc>::iterator init = inFiles.begin(); init != inFiles.end(); ++init) {
+    if (excludeFileHashes != NULL) {
+      bool excludethisfile = false;
+
+      for (vector<unsigned long>::iterator exit = excludeFileHashes->begin(); exit != excludeFileHashes->end(); ++exit)
+       if ( *exit == hash(init->filename) ) {
+         excludethisfile = true;
+         break;
+       }
+
+      if (excludethisfile)
+       continue;
+    }
+    return init;
+  }
+  return inFiles.end();
+}