X-Git-Url: http://git.treefish.org/~alex/phys/latlib.git/blobdiff_plain/66dd4bd348bacf6b43b59c2b349a913b722c6504..33ee1f81e21dbb384b48c8083aff790ca313558e:/configcache.cpp

diff --git a/configcache.cpp b/configcache.cpp
index ef085d8..5987789 100644
--- a/configcache.cpp
+++ b/configcache.cpp
@@ -4,11 +4,26 @@
 #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
 
+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,
 			 ostream *_log){
   log = _log;
@@ -29,8 +44,9 @@ configcache::configcache(const string& cacheid, const int& nequi, const int& nsk
   *configmem = configMem;
   configSize = configMemSize;
 
-  outBuffer = NULL;
-  inBuffer = NULL;
+  ioBuffers = new iobuffers;
+  ioBuffers->in = NULL;
+  ioBuffers->out = NULL;
 
   MODE = cachemode;
 
@@ -178,7 +194,7 @@ void configcache::readConfig(bool *readnewconfig, int *nequileft, vector<unsigne
 {
   *readnewconfig = false;
 
-  if(DATADIR == "" || MODE == CACHE_MODE_DISABLED) return;
+  if( DATADIR == "" || !(MODE==CACHE_MODE_RO||MODE==CACHE_MODE_RW) ) return;
 
   if(refetchDataFiles){
     refetchDataFiles = false;
@@ -213,9 +229,9 @@ void configcache::readConfig(bool *readnewconfig, int *nequileft, vector<unsigne
 	
 	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() ) 
@@ -261,44 +277,60 @@ void configcache::readConfig(bool *readnewconfig, int *nequileft, vector<unsigne
 void configcache::openOutFile(int actnequi)
 { 
   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(actnequi) << "_.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 );
 
-  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, int actnequi) {
   unsigned long headeridhash;
 
-  if( DATADIR == "" || MODE < 2 ) return;
+  if( DATADIR == "" || !(MODE==CACHE_MODE_WO||MODE==CACHE_MODE_RW) ) return;
 
   if(!outFile.is_open())
     openOutFile(actnequi);
 
   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(int actnequi)
 {
   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() )
     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){
@@ -317,7 +349,7 @@ void configcache::setPara(const string& parid, const double& value){
   Paras[getParIndex(parid)].val = value;
 
   finishOutFile();
-  if(inBuffer != NULL) { delete inBuffer; inBuffer=NULL; } 
+  if(ioBuffers->in != NULL) { delete ioBuffers->in; ioBuffers->in=NULL; } 
   inFile.close();
   inFiles.clear();
 
@@ -328,16 +360,16 @@ void configcache::setPara(const string& parid, const double& value){
 configcache::~configcache()
 {
   finishOutFile();
-  delete inBuffer;
-  inBuffer = NULL;
+  delete ioBuffers->in;
+  ioBuffers->in = NULL;
 }
 
 void configcache::finishOutFile()
 {
-  if( outBuffer != NULL )
+  if( ioBuffers->out != NULL )
     {
-      delete outBuffer;
-      outBuffer = NULL;
+      delete ioBuffers->out;
+      ioBuffers->out = NULL;
     }
 
   if( outFile.is_open() )
@@ -364,7 +396,7 @@ int configcache::readDataToMem(char *tmpData, long unsigned int dataSize)
 
   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) { 
     if(log) *log << "CCACHE: Caught bzip2 exception with error code: " << error.error() << endl << flush;
     inFile.close();