EventMsgBuilder Class Reference

#include <EventMsgBuilder.h>

Public Member Functions
uint32	bufferSize () const
uint8 *	eventAddr () const
	EventMsgBuilder (void *buf, uint32 size, uint32 run, uint64 event, uint32 lumi, uint32 outModId, uint32 droppedEventsCount, std::vector< bool > &l1_bits, uint8 *hlt_bits, uint32 hlt_bit_count, uint32 adler32_chksum, const char *host_name)
uint32	headerSize () const
void	setBufAddr (uint8 *buf_addr)
void	setEventAddr (uint8 *event_addr)
void	setEventLength (uint32 len)
void	setOrigDataSize (uint32)
uint32	size () const
uint8 *	startAddress () const

Static Public Member Functions
static uint32	computeHeaderSize (uint32 l1t_bit_count, uint32 hlt_bit_count)

Private Attributes
uint8 *	buf_
uint8 *	event_addr_
uint32	size_

Detailed Description

Definition at line 8 of file EventMsgBuilder.h.

Constructor & Destructor Documentation

EventMsgBuilder()

EventMsgBuilder::EventMsgBuilder	(	void *	buf,
		uint32	size,
		uint32	run,
		uint64	event,
		uint32	lumi,
		uint32	outModId,
		uint32	droppedEventsCount,
		std::vector< bool > &	l1_bits,
		uint8 *	hlt_bits,
		uint32	hlt_bit_count,
		uint32	adler32_chksum,
		const char *	host_name
	)

Definition at line 10 of file EventMsgBuilder.cc.

References cms::cuda::assert(), buf_, computeHeaderSize(), fileCollector::convert(), filterCSVwithJSON::copy, event_addr_, Exception, h, headerSize(), mps_fire::i, MAX_HOSTNAME_LEN, writedatasetfile::run, setEventLength(), size_, and findQualityFiles::v.

    : buf_((uint8*)buf), size_(size) {
  uint32 expectedHeaderSize = computeHeaderSize(l1_bits.size(), hlt_bit_count);
  if (expectedHeaderSize > size_) {
    throw cms::Exception("EventMsgBuilder")
        << "The buffer used to build the event message (" << size_
        << " bytes) is not large enough to holde the event header (" << expectedHeaderSize << " bytes)";
  }

  // Note: any change to the pos increment logic should be reflected in computeHeaderSize()
  uint8* pos = buf_;

  // Set the event header
  EventHeader* h = (EventHeader*)pos;
  h->protocolVersion_ = 11;
  convert(run, h->run_);
  convert(event, h->event_);
  convert(lumi, h->lumi_);
  convert(outModId, h->outModId_);
  convert(droppedEventsCount, h->droppedEventsCount_);
  pos += sizeof(EventHeader);

  // Set the L1T triggers count
  uint32 l1_count = l1_bits.size();
  convert(l1_count, pos);
  pos += sizeof(uint32);

  // Set the L1T bits
  uint32 l1_sz = (l1_bits.size() + 8 - 1) / 8;  // L1T results (1 bit per trigger)
  memset(pos, 0x00, l1_sz);                     // clear the bits
  for (std::vector<bool>::size_type i = 0; i < l1_bits.size(); ++i) {
    uint8 v = l1_bits[i] ? 1 : 0;
    pos[i / 8] |= (v << (i & 0x07));
  }
  pos += l1_sz;

  // Set HLT triggers count
  convert(hlt_bit_count, pos);
  pos += sizeof(uint32);

  // Copy the HLT bits and increment pos
  uint32 hlt_sz = (hlt_bit_count + 4 - 1) / 4;  // HLT results (2 bits per trigger)
  pos = std::copy(hlt_bits, hlt_bits + hlt_sz, pos);

  // Set the Adler32 check sum of data blob
  convert(adler_chksum, pos);
  pos += sizeof(uint32);

  // Put the host name (length and then name) right after the check sum.
  // Use a fixed length for the host_name because the event header size appears in the
  // init message and only one goes to a file whereas events can come from any node,
  // while we want the max length to be determined inside this Event Message Builder.

  // Set the host_name_len and increment pos
  assert(MAX_HOSTNAME_LEN < 0x00ff);
  *pos++ = MAX_HOSTNAME_LEN;

  // Copy up to MAX_HOSTNAME_LEN characters of the host_name and pad any extra space
  // with null characters
  memset(pos, '\0', MAX_HOSTNAME_LEN);
  strncpy((char*)pos, host_name, MAX_HOSTNAME_LEN - 1);
  pos += MAX_HOSTNAME_LEN;

  event_addr_ = pos + sizeof(char_uint32);
  setEventLength(0);

  // Check that the size computed by computeHeaderSize() matches what is actually used.
  if (headerSize() != expectedHeaderSize) {
    throw cms::Exception("EventMsgBuilder")
        << "The event message header size (" << headerSize() << " bytes) does not match the computed value ("
        << expectedHeaderSize << " bytes)";
  }
}

Member Function Documentation

bufferSize()

uint32 EventMsgBuilder::bufferSize ( ) const

inline

Definition at line 31 of file EventMsgBuilder.h.

References size_.

{ return size_; }

computeHeaderSize()

uint32 EventMsgBuilder::computeHeaderSize ( uint32  l1t_bit_count, uint32  hlt_bit_count  )

static

Definition at line 111 of file EventMsgBuilder.cc.

References MAX_HOSTNAME_LEN, and size().

Referenced by EventMsgBuilder(), and InitMsgBuilder::InitMsgBuilder().

                                                                                    {
  uint32 size = sizeof(EventHeader);    // event header
  size += sizeof(uint32);               // L1T triggers count
  size += (l1t_bit_count + 8 - 1) / 8;  // L1T results (1 bit per trigger)
  size += sizeof(uint32);               // HLT triggers count
  size += (hlt_bit_count + 4 - 1) / 4;  // HLT results (2 bits per trigger)
  size += sizeof(uint32);               // adler32 check sum
  size += 1;                            // host name length
  size += MAX_HOSTNAME_LEN;             // host name
  size += sizeof(char_uint32);          // event address
  return size;
}

eventAddr()

uint8* EventMsgBuilder::eventAddr ( ) const

inline

Definition at line 28 of file EventMsgBuilder.h.

References event_addr_.

{ return event_addr_; }

headerSize()

uint32 EventMsgBuilder::headerSize ( ) const

inline

Definition at line 29 of file EventMsgBuilder.h.

References buf_, and event_addr_.

Referenced by EventMsgBuilder().

{ return event_addr_ - buf_; }

setBufAddr()

void EventMsgBuilder::setBufAddr ( uint8 *  buf_addr )

inline

Definition at line 26 of file EventMsgBuilder.h.

References buf_.

{ buf_ = buf_addr; }

setEventAddr()

void EventMsgBuilder::setEventAddr ( uint8 *  event_addr )

inline

Definition at line 27 of file EventMsgBuilder.h.

References event_addr_.

{ event_addr_ = event_addr; }

setEventLength()

void EventMsgBuilder::setEventLength

(

uint32

len

)

Definition at line 100 of file EventMsgBuilder.cc.

References buf_, fileCollector::convert(), Header::EVENT, event_addr_, and h.

Referenced by EventMsgBuilder().

                                               {
  convert(len, event_addr_ - sizeof(char_uint32));
  EventHeader* h = (EventHeader*)buf_;
  new (&h->header_) Header(Header::EVENT, event_addr_ - buf_ + len);
}

setOrigDataSize()

void EventMsgBuilder::setOrigDataSize

(

uint32

value

)

Definition at line 95 of file EventMsgBuilder.cc.

References buf_, fileCollector::convert(), and h.

                                                  {
  EventHeader* h = (EventHeader*)buf_;
  convert(value, h->origDataSize_);
}

size()

uint32 EventMsgBuilder::size

(

void

)

const

Definition at line 106 of file EventMsgBuilder.cc.

References buf_, and findQualityFiles::v.

Referenced by ntupleDataFormat._Collection::__iter__(), ntupleDataFormat._Collection::__len__(), and computeHeaderSize().

                                   {
  HeaderView v(buf_);
  return v.size();
}

startAddress()

uint8* EventMsgBuilder::startAddress ( ) const

inline

Definition at line 24 of file EventMsgBuilder.h.

References buf_.

Referenced by StreamerOutputFile::write().

{ return buf_; }

Member Data Documentation

buf_

uint8* EventMsgBuilder::buf_

private

Definition at line 36 of file EventMsgBuilder.h.

Referenced by EventMsgBuilder(), headerSize(), setBufAddr(), setEventLength(), setOrigDataSize(), size(), and startAddress().

event_addr_

uint8* EventMsgBuilder::event_addr_

private

Definition at line 38 of file EventMsgBuilder.h.

Referenced by eventAddr(), EventMsgBuilder(), headerSize(), setEventAddr(), and setEventLength().

size_

uint32 EventMsgBuilder::size_

private

Definition at line 37 of file EventMsgBuilder.h.

Referenced by bufferSize(), and EventMsgBuilder().