2 #include "artdaq-core/Core/SharedMemoryEventReceiver.hh"
4 #include "artdaq-core/Data/Fragment.hh"
6 #define TRACE_NAME "SharedMemoryEventReceiver"
12 : current_read_buffer_(-1)
14 , current_header_(nullptr)
15 , current_data_source_(nullptr)
17 , broadcasts_(broadcast_shm_key)
19 TLOG(TLVL_TRACE) <<
"SharedMemoryEventReceiver CONSTRUCTOR" ;
24 TLOG(TLVL_TRACE) <<
"ReadyForRead BEGIN" ;
25 if (current_read_buffer_ != -1 && current_data_source_ && current_header_)
27 TLOG(TLVL_TRACE) <<
"ReadyForRead Returning true because already reading buffer" ;
36 if (broadcasts_.ReadyForRead())
38 buf = broadcasts_.GetBufferForReading();
39 current_data_source_ = &broadcasts_;
41 else if (!broadcast && data_.ReadyForRead())
43 buf = data_.GetBufferForReading();
44 current_data_source_ = &data_;
46 if (buf != -1 && current_data_source_)
48 TLOG(TLVL_TRACE) <<
"ReadyForRead Found buffer, returning true" ;
49 current_read_buffer_ = buf;
50 current_data_source_->ResetReadPos(buf);
54 if (current_data_source_ == &broadcasts_)
57 auto types = GetFragmentTypes(err);
71 current_data_source_ =
nullptr;
75 TLOG(TLVL_TRACE) <<
"ReadyForRead returning false" ;
81 TLOG(TLVL_TRACE) <<
"ReadHeader BEGIN" ;
82 if (current_read_buffer_ != -1 && current_data_source_)
87 TLOG(TLVL_WARNING) <<
"Buffer was in incorrect state, resetting" ;
88 current_data_source_ =
nullptr;
89 current_read_buffer_ = -1;
90 current_header_ =
nullptr;
94 TLOG(TLVL_TRACE) <<
"Already have buffer, returning stored header" ;
95 return current_header_;
100 if (current_read_buffer_ == -1 || !current_header_ || !current_data_source_)
throw cet::exception(
"AccessViolation") <<
"Cannot call GetFragmentTypes when not currently reading a buffer! Call ReadHeader() first!";
103 if (err)
return std::set<Fragment::type_t>();
105 current_data_source_->ResetReadPos(current_read_buffer_);
107 auto output = std::set<Fragment::type_t>();
109 while (current_data_source_->MoreDataInBuffer(current_read_buffer_))
112 if (err)
return std::set<Fragment::type_t>();
114 output.insert(fragHdr->type);
115 current_data_source_->IncrementReadPos(current_read_buffer_, fragHdr->word_count *
sizeof(
RawDataType));
124 if (!current_data_source_ || !current_header_ || current_read_buffer_ == -1)
throw cet::exception(
"AccessViolation") <<
"Cannot call GetFragmentsByType when not currently reading a buffer! Call ReadHeader() first!";
126 if (err)
return nullptr;
128 current_data_source_->ResetReadPos(current_read_buffer_);
131 std::unique_ptr<Fragments> output(
new Fragments());
133 while (current_data_source_->MoreDataInBuffer(current_read_buffer_))
136 if (err)
return nullptr;
141 current_data_source_->Read(current_read_buffer_, output->back().headerAddress(), fragHdr->word_count *
sizeof(
RawDataType));
142 output->back().autoResize();
146 current_data_source_->IncrementReadPos(current_read_buffer_, fragHdr->word_count *
sizeof(
RawDataType));
153 std::string artdaq::SharedMemoryEventReceiver::printBuffers_(
SharedMemoryManager* data_source)
155 std::ostringstream ostr;
156 for (
size_t ii = 0; ii < data_source->
size(); ++ii)
158 ostr <<
"Buffer " << std::to_string(ii) <<
": " << std::endl;
166 ostr <<
" Fragment " << std::to_string(fragHdr->fragment_id) <<
": Sequence ID: " << std::to_string(fragHdr->sequence_id) <<
", Type:" << std::to_string(fragHdr->type);
167 if (fragHdr->MakeVerboseSystemTypeMap().count(fragHdr->type))
169 ostr <<
" (" << fragHdr->MakeVerboseSystemTypeMap()[fragHdr->type] <<
")";
171 ostr <<
", Size: " << std::to_string(fragHdr->word_count) <<
" words." << std::endl;
181 std::ostringstream ostr;
182 ostr << data_.toString() << std::endl;
184 ostr <<
"Data Buffer Fragment Counts: " << std::endl;
185 ostr << printBuffers_(&data_);
187 if (data_.GetKey() != broadcasts_.GetKey())
189 ostr <<
"Broadcast Buffer Fragment Counts: " << std::endl;
190 ostr << printBuffers_(&broadcasts_);
198 TLOG(TLVL_TRACE) <<
"ReleaseBuffer BEGIN" ;
201 current_data_source_->MarkBufferEmpty(current_read_buffer_);
203 catch (cet::exception e)
205 TLOG(TLVL_WARNING) <<
"A cet::exception occured while trying to release the buffer: " << e ;
209 TLOG(TLVL_ERROR) <<
"An unknown exception occured while trying to release the buffer" ;
211 current_read_buffer_ = -1;
212 current_header_ =
nullptr;
213 current_data_source_ =
nullptr;
214 TLOG(TLVL_TRACE) <<
"ReleaseBuffer END" ;
static constexpr type_t InvalidFragmentType
Copy InvalidFragmentType from RawFragmentHeader.
std::vector< Fragment > Fragments
A std::vector of Fragment objects.
void ReleaseBuffer()
Release the buffer currently being read to the Empty state.
void IncrementReadPos(int buffer, size_t read)
Increment the read position for a given buffer.
detail::RawFragmentHeader::type_t type_t
typedef for type_t from RawFragmentHeader
void ResetReadPos(int buffer)
Set the read position of the given buffer to the beginning of the buffer.
bool MoreDataInBuffer(int buffer)
Determine if more data is available to be read, based on the read position and data size...
static constexpr type_t InitFragmentType
Copy InitFragmentType from RawFragmentHeader.
The buffer is currently being read from.
The SharedMemoryManager creates a Shared Memory area which is divided into a number of fixed-size buf...
SharedMemoryEventReceiver(uint32_t shm_key, uint32_t broadcast_shm_key)
Connect to a Shared Memory segment using the given parameters.
size_t size() const
Get the number of buffers in the shared memory segment.
detail::RawFragmentHeader::RawDataType RawDataType
The RawDataType (currently a 64-bit integer) is the basic unit of data representation within artdaq ...
std::set< Fragment::type_t > GetFragmentTypes(bool &err)
Get a set of Fragment Types present in the event.
void * GetReadPos(int buffer)
Get a pointer to the current read position of the buffer.
bool ReadyForRead(bool broadcast=false, size_t timeout_us=1000000)
Determine whether an event is available for reading.
std::string toString()
Write out information about the Shared Memory to a string.
detail::RawEventHeader * ReadHeader(bool &err)
Get the Event header.
uint64_t gettimeofday_us()
Get the current time of day in microseconds (from gettimeofday system call)
std::unique_ptr< Fragments > GetFragmentsByType(bool &err, Fragment::type_t type)
Get a pointer to the Fragments of a given type in the event.