artdaq_core  v3_01_05
SharedMemoryFragmentManager.hh
1 #ifndef ARTDAQ_CORE_CORE_SHARED_MEMORY_FRAGMENT_MANAGER_HH
2 #define ARTDAQ_CORE_CORE_SHARED_MEMORY_FRAGMENT_MANAGER_HH 1
3 
4 #include "artdaq-core/Core/SharedMemoryManager.hh"
5 #include "artdaq-core/Data/RawEvent.hh"
6 
7 namespace artdaq {
12  {
13  public:
22  SharedMemoryFragmentManager(uint32_t shm_key, size_t buffer_count, size_t max_buffer_size, size_t buffer_timeout_us = 100 * 1000000);
23 
27  virtual ~SharedMemoryFragmentManager() =default;
28 
35  int WriteFragment(Fragment&& fragment, bool overwrite);
36 
42  int ReadFragment(Fragment& fragment);
43 
50 
57  int ReadFragmentData(RawDataType* destination, size_t words);
58 
59  private:
60  int active_buffer_;
61 
62  };
63 }
64 
65 #endif //ARTDAQ_CORE_CORE_SHARED_MEMORY_FRAGMENT_MANAGER_HH
int WriteFragment(Fragment &&fragment, bool overwrite)
Write a Fragment to the Shared Memory.
The SharedMemoryFragmentManager is a SharedMemoryManager that deals with Fragment transfers using a S...
The RawFragmentHeader class contains the basic fields used by artdaq for routing Fragment objects thr...
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 ...
Definition: Fragment.hh:39
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...
Definition: Fragment.hh:84
virtual ~SharedMemoryFragmentManager()=default
SharedMemoryFragmentManager destructor.
int ReadFragmentData(RawDataType *destination, size_t words)
Read Fragment Data from the Shared Memory.