gEventHeader.h File Reference

Defines GEventHeader metadata for an event data collection. More...

#include "gbase.h"
#include <atomic>
#include <string>

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Data Structures
class	GEventHeader
	Minimal event metadata header: event number, thread id, and timestamp. More...

Namespaces
namespace	geventheader

Functions
GOptions	geventheader::defineOptions ()
	Defines GOptions for the event-header logger domain.

Variables
constexpr const char *	GDATAEVENTHEADER_LOGGER = "event_header"

Detailed Description

The event header records:

• a local event number (g4localEventNumber)
• a thread identifier (threadID)
• a timestamp string (timeStamp)

In production GEMC/Geant4, event number and thread ID would typically come from Geant4 (e.g. G4Event and G4Threading). In this library, create() provides a deterministic generator for examples and tests.

Timestamp behavior:

• Time stamp is generated using local system time at construction.

Note

Threading The factory create() uses an atomic counter so that concurrent calls from multiple threads produce unique event numbers in examples/tests.

Definition in file gEventHeader.h.

Variable Documentation

GDATAEVENTHEADER_LOGGER

constexpr const char* GDATAEVENTHEADER_LOGGER = "event_header"

constexpr

Definition at line 32 of file gEventHeader.h.