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_TRACE(
"SharedMemoryEventReceiver") <<
"SharedMemoryEventReceiver CONSTRUCTOR" << TLOG_ENDL;
24 TLOG(4) <<
"ReadyForRead BEGIN" << TLOG_ENDL;
25 if (current_read_buffer_ != -1 && current_data_source_ && current_header_)
27 TLOG_TRACE(
"SharedMemoryEventReceiver") <<
"ReadyForRead Returning true because already reading buffer" << TLOG_ENDL;
35 if (broadcasts_.ReadyForRead())
37 buf = broadcasts_.GetBufferForReading();
38 current_data_source_ = &broadcasts_;
40 else if (!broadcast && data_.ReadyForRead())
42 buf = data_.GetBufferForReading();
43 current_data_source_ = &data_;
45 if (buf != -1 && current_data_source_)
47 TLOG_TRACE(
"SharedMemoryEventReceiver") <<
"ReadyForRead Found buffer, returning true" << TLOG_ENDL;
48 current_read_buffer_ = buf;
49 current_data_source_->ResetReadPos(buf);
53 if (current_data_source_ == &broadcasts_)
56 auto types = GetFragmentTypes(err);
70 current_data_source_ =
nullptr;
73 TLOG(4) <<
"ReadyForRead returning false" << TLOG_ENDL;
79 TLOG_TRACE(
"SharedMemoryEventReceiver") <<
"ReadHeader BEGIN" << TLOG_ENDL;
80 if (current_read_buffer_ != -1 && current_data_source_)
85 TLOG_WARNING(
"SharedMemoryEventReceiver") <<
"Buffer was in incorrect state, resetting" << TLOG_ENDL;
86 current_data_source_ =
nullptr;
87 current_read_buffer_ = -1;
88 current_header_ =
nullptr;
92 TLOG_TRACE(
"SharedMemoryEventReceiver") <<
"Already have buffer, returning stored header" << TLOG_ENDL;
93 return current_header_;
98 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!";
101 if (err)
return std::set<Fragment::type_t>();
103 current_data_source_->ResetReadPos(current_read_buffer_);
105 auto output = std::set<Fragment::type_t>();
107 while (current_data_source_->MoreDataInBuffer(current_read_buffer_))
110 if (err)
return std::set<Fragment::type_t>();
112 output.insert(fragHdr->type);
113 current_data_source_->IncrementReadPos(current_read_buffer_, fragHdr->word_count *
sizeof(
RawDataType));
122 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!";
124 if (err)
return nullptr;
126 current_data_source_->ResetReadPos(current_read_buffer_);
129 std::unique_ptr<Fragments> output(
new Fragments());
131 while (current_data_source_->MoreDataInBuffer(current_read_buffer_))
134 if (err)
return nullptr;
139 current_data_source_->Read(current_read_buffer_, output->back().headerAddress(), fragHdr->word_count *
sizeof(
RawDataType));
140 output->back().autoResize();
144 current_data_source_->IncrementReadPos(current_read_buffer_, fragHdr->word_count *
sizeof(
RawDataType));
151 std::string artdaq::SharedMemoryEventReceiver::printBuffers_(
SharedMemoryManager* data_source)
153 std::ostringstream ostr;
154 for (
size_t ii = 0; ii < data_source->
size(); ++ii)
156 ostr <<
"Buffer " << std::to_string(ii) <<
": " << std::endl;
164 ostr <<
" Fragment " << std::to_string(fragHdr->fragment_id) <<
": Sequence ID: " << std::to_string(fragHdr->sequence_id) <<
", Type:" << std::to_string(fragHdr->type);
165 if (fragHdr->MakeVerboseSystemTypeMap().count(fragHdr->type))
167 ostr <<
" (" << fragHdr->MakeVerboseSystemTypeMap()[fragHdr->type] <<
")";
169 ostr <<
", Size: " << std::to_string(fragHdr->word_count) <<
" words." << std::endl;
179 std::ostringstream ostr;
180 ostr << data_.toString() << std::endl;
182 ostr <<
"Data Buffer Fragment Counts: " << std::endl;
183 ostr << printBuffers_(&data_);
185 if (data_.GetKey() != broadcasts_.GetKey())
187 ostr <<
"Broadcast Buffer Fragment Counts: " << std::endl;
188 ostr << printBuffers_(&broadcasts_);
196 TLOG_TRACE(
"SharedMemoryEventReceiver") <<
"ReleaseBuffer BEGIN" << TLOG_ENDL;
199 current_data_source_->MarkBufferEmpty(current_read_buffer_);
201 catch (cet::exception e)
203 TLOG_WARNING(
"SharedMemoryEventReceiver") <<
"A cet::exception occured while trying to release the buffer: " << e << TLOG_ENDL;
207 TLOG_ERROR(
"SharedMemoryEventReceiver") <<
"An unknown exception occured while trying to release the buffer" << TLOG_ENDL;
209 current_read_buffer_ = -1;
210 current_header_ =
nullptr;
211 current_data_source_ =
nullptr;
212 TLOG_TRACE(
"SharedMemoryEventReceiver") <<
"ReleaseBuffer END" << TLOG_ENDL;
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.