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File indexing completed on 2025-08-03 08:20:39

 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <string.h>
 
 #include "ospBuffer.h"
 #include "ospEvent.h"
 
 #include "BufferConstants.h"
 #include "EventTypes.h"
 
 
 // the constructor first ----------------
 
 
 // the constructor first ----------------
 ospBuffer::ospBuffer (const char *filename, PHDWORD * where, const int length, int &status
         , const int irun, const int iseq)
 {
   status = 0;
   our_fd = 1;
 
   fd =  open(filename, O_WRONLY | O_CREAT | O_EXCL | O_LARGEFILE , 
           S_IRWXU | S_IROTH | S_IRGRP );
 
   if ( fd < 0) 
     {
       status =1;
       good_object = 0;
       return;
     }
   good_object = 1;
   bptr = ( buffer_ptr) where;
   data_ptr = &(bptr->data[0]);
   max_length = length;
   max_size = max_length;
   left = max_size - BUFFERHEADERLENGTH;
   bptr->ID = -64;
   bptr->Bufseq = iseq;
   bptr->Runnr = 0;
   current_event = 0;
   current_etype = DATAEVENT;
   sequence = iseq;
   eventsequence = 0;
   runnumber = irun;
   byteswritten = 0;
 
   prepare_next ();
 }
 
 ospBuffer::ospBuffer (int fdin, PHDWORD * where, const int length
         , const int irun, const int iseq)
 {
   fd = fdin;
   our_fd = 0;
   good_object = 1;
   bptr = ( buffer_ptr) where;
   data_ptr = &(bptr->data[0]);
   max_length = length;
   max_size = max_length;
   left = max_size - BUFFERHEADERLENGTH;
   bptr->ID = -64;
   bptr->Bufseq = iseq;
   bptr->Runnr = 0;
   current_event = 0;
   current_etype = DATAEVENT;
   sequence = iseq;
   eventsequence = 0;
   runnumber = irun;
   byteswritten = 0;
 
   prepare_next ();
 }
 
 
 // ---------------------------------------------------------
 int ospBuffer::nextEvent( const unsigned int evtsize, const int etype, const int evtseq)
   
 {
 
   if (current_event) delete current_event;
   current_event = 0;
 
   if (evtsize > max_size - EVTHEADERLENGTH) return -1;
   if (evtsize <=0) return -2;
 
   if (evtsize > left-EOBLENGTH)
     {
       writeout();
       prepare_next();
     }
 
   if (etype >0)   current_etype = etype;
 
   if (evtseq > 0)  eventsequence = evtseq;
   else eventsequence++;
 
 
   current_event = new ospEvent(&(bptr->data[current_index]), evtsize
                  ,bptr->Runnr, current_etype, eventsequence);
 
   left -= EVTHEADERLENGTH;
   current_index += EVTHEADERLENGTH;
   bptr->Length  += EVTHEADERLENGTH*4;
   bptr->Bufseq++;
 
   dirty = 1;
   return 0;
 }
 
 
 
 
 // ---------------------------------------------------------
 int ospBuffer::addRawEvent( unsigned int *data)
 {
   
   if ( ! good_object) return -1;
   int wstatus;
 
   unsigned int nw = data[0];
 
   if ( nw > left-EOBLENGTH)
     {
       wstatus = writeout();
       prepare_next();
       if (wstatus) return wstatus;
     }
 
   memcpy (  (char *) &(bptr->data[current_index]), (char *) data, 4*nw);
     
   left -= nw;
   current_index += nw;
   bptr->Length  += nw*4;
   bptr->Bufseq++;
   dirty =1;
   return 0; 
 }
 
 
 // ---------------------------------------------------------
 int ospBuffer::addEvent( Event *Evt)
 {
   
   if ( ! good_object) return -1;
   int nw;
 
   int wstatus;
 
   runnumber = Evt->getRunNumber();
 
   if ( Evt->getEvtLength() > left-EOBLENGTH)
     {
       wstatus = writeout();
       prepare_next();
       if (wstatus) return wstatus;
     }
 
   Evt->Copy( (int *) &(bptr->data[current_index]), Evt->getEvtLength(), &nw);
     
   left -= nw;
   current_index += nw;
   bptr->Length  += nw*4;
   bptr->Bufseq++;
   dirty =1;
   return 0;
 }
 
 
 // ----------------------------------------------------------
 int ospBuffer::addPacket( const Packet *p) 
 {
   int len;
 
   if ( ! good_object) return 0;
 
   len = current_event->addPacket(p);
   if (len < 0) return 0;
     
   left -= len;
   current_index += len;
   bptr->Length  += len*4;
   
 
   return len;
 }
 
 
 
 
 // ----------------------------------------------------------
 int ospBuffer::addUnstructPacketData(PHDWORD * data, 
             const int length,
             const int id,
             const int wordsize,
             const int hitformat)
 {
   int len;
 
   if ( ! good_object) return 0;
 
   len = current_event->addUnstructPacketData(data, length
                          ,id , wordsize , hitformat);
   if (len < 0) return 0;
     
   left -= len;
   current_index += len;
   bptr->Length  += len*4;
   
   // for (int k = 0; k<current_index; k++)
   //  COUT << k << " " << bptr->data[k] << std::endl;
 
   //  COUT << "------------------" << std::endl;
 
 
   return len;
 }
 
 // ---------------------------------------------------------
 int ospBuffer::prepare_next()
 {
   
   // re-initialize the event header length
   bptr->Length =  BUFFERHEADERLENGTH*4;
   bptr->ID = 0xffffc0c0;
   bptr->Bufseq = 0;
   sequence++;
   bptr->Runnr = runnumber;
 
   current_index = 0;
   left=max_size - BUFFERHEADERLENGTH ;
   has_end = 0;
   dirty = 1;
   return 0;
 }
 
 // ----------------------------------------------------------
 int ospBuffer::setMaxSize(const int size)
 {
   if (size < 0) return -1;
   if (size == 0) max_size = max_length;
   else
     {
       max_size = (size + ( BUFFERBLOCKSIZE - size%BUFFERBLOCKSIZE) ) /4;
       if (max_size > max_length)
     {
       max_size = max_length;
       return -2;
     }
     }
   return 0;
 }
 
 // ----------------------------------------------------------
 int ospBuffer::getMaxSize() const
 {
   return max_size;
 }
 
 // ----------------------------------------------------------
 unsigned long long ospBuffer::getBytesWritten() const
 {
   return byteswritten;
 }
 
 // ----------------------------------------------------------
 // 
 //
 int ospBuffer::writeout()
 {
 
   //  void *writeThread(void *);
 
   if ( ! good_object || fd <= 0 ) return -1;
 
 
       if (! dirty) return 0;
       
       if (! has_end) addEoB();
 
       if (fd < 0) return 0;
 
 
       unsigned int ip =0;
       char *cp = (char *) bptr;
 
       while (ip < bptr->Length)
     {
       int n = write ( fd, cp, BUFFERBLOCKSIZE);
       if ( n != BUFFERBLOCKSIZE)
         {
           std::cout << " could not write output, bytes written: " << n << std::endl;
           return 0;
         }
       cp += BUFFERBLOCKSIZE;
       ip+=BUFFERBLOCKSIZE;
     }
       dirty = 0;
       byteswritten += ip;
       return 0;
 #ifdef WITHTHREADS
   
     }
   else
     {
       //wait for a potential old thread to complete
       if (ThreadId) 
     {
       pthread_join(ThreadId, NULL);
       byteswritten += thread_arg[2];  // the number of bytes written from previosu thread
     }
       if (! dirty) return 0;
       
       if (! has_end) addEoB();
      
       if (fd <  0) return 0;
 
       //swap the buffers around
       buffer_ptr tmp = bptr_being_written;
       bptr_being_written = bptr;
       bptr = tmp;
       dirty = 0;
       // now fork off the write thread
 
       thread_arg[0] = (int) fd;
       thread_arg[1] = (int)  bptr_being_written;
       thread_arg[2] = 0;
 
       //      COUT << "starting write thread" << std::endl;
       int s = pthread_create(&ThreadId, NULL, ophBuffer::writeThread, (void *) thread_arg);
       //COUT << "create status is " << s << std::endl;
 
       return 0;
 
     }
 #endif
 }
 
 
 
 // ----------------------------------------------------------
 int ospBuffer::addEoB()
 {
   if (has_end) return -1;
   bptr->data[current_index++] = 2;  
   bptr->data[current_index++] = 0;
   bptr->Length  += 2*4;
 
   has_end = 1;
   return 0;
 }
 
 
 // ----------------------------------------------------------
 ospBuffer::~ospBuffer()
 {
   writeout();
   if (our_fd) close (fd);
 
 }
 
 
 

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