1 #include "artdaq-core/Core/SharedMemoryFragmentManager.hh"
5 #define TRACE_NAME "SharedMemoryFragmentManager"
16 if (!IsValid()) {
return -1; }
18 TLOG(13) <<
"Sending fragment with seqID=" << fragment.sequenceID() << TLOG_ENDL;
22 auto buf = GetBufferForWriting(overwrite);
23 auto sts = Write(buf, fragAddr, fragSize);
26 TLOG(13) <<
"Done sending Fragment with seqID=" << fragment.sequenceID() << TLOG_ENDL;
30 TLOG(TLVL_ERROR) <<
"Unexpected status from SharedMemory Write call!" << TLOG_ENDL;
36 TLOG(14) <<
"ReadFragment BEGIN" << TLOG_ENDL;
39 TLOG(14) <<
"Reading Fragment Header" << TLOG_ENDL;
40 auto sts = ReadFragmentHeader(tmpHdr);
41 if (sts != 0)
return sts;
44 TLOG(14) <<
"Reading Fragment Body" << TLOG_ENDL;
50 if (!IsValid())
return -3;
53 active_buffer_ = GetBufferForReading();
55 if (active_buffer_ == -1)
return -1;
57 auto sts = Read(active_buffer_, &header, hdrSize);
65 if (!IsValid() || active_buffer_ == -1 || !CheckBuffer(active_buffer_, BufferSemaphoreFlags::Reading)) {
66 TLOG(TLVL_ERROR) <<
"ReadFragmentData: Buffer " << active_buffer_ <<
" failed status checks: IsValid()=" << std::boolalpha << IsValid() <<
", CheckBuffer=" << CheckBuffer(active_buffer_, BufferSemaphoreFlags::Reading) << TLOG_ENDL;
70 auto sts = Read(active_buffer_, destination, words *
sizeof(
RawDataType));
72 TLOG(TLVL_ERROR) <<
"ReadFragmentData: Buffer " << active_buffer_ <<
" returned bad status code from Read" << TLOG_ENDL;
76 MarkBufferEmpty(active_buffer_);
int WriteFragment(Fragment &&fragment, bool overwrite)
Write a Fragment to the Shared Memory.
void resize(std::size_t sz)
Resize the data payload to hold sz RawDataType words.
SharedMemoryFragmentManager(uint32_t shm_key, size_t buffer_count, size_t max_buffer_size, size_t buffer_timeout_us=100 *1000000)
SharedMemoryFragmentManager Constructor.
The SharedMemoryManager creates a Shared Memory area which is divided into a number of fixed-size buf...
detail::RawFragmentHeader::RawDataType RawDataType
The RawDataType (currently a 64-bit integer) is the basic unit of data representation within artdaq ...
int ReadFragmentHeader(detail::RawFragmentHeader &header)
Read a Fragment Header from the Shared Memory.
int ReadFragment(Fragment &fragment)
Read a Fragment from the Shared Memory.
A Fragment contains the data from one piece of the DAQ system for one event The artdaq::Fragment is t...
int ReadFragmentData(RawDataType *destination, size_t words)
Read Fragment Data from the Shared Memory.
RawDataType * headerAddress()
Gets the address of the header.