et_mem_t Struct Reference

Structure containing info stored at front of shared or mapped memory. More...

#include <et_private.h>

Data Fields
uint32_t	byteOrder
	Should be 0x01020304, if not, byte order is reversed from local order.
uint32_t	systemType
	Type of local system using the shared memory: ET_SYSTEM_TYPE_C is an ET system written in C, and ET_SYSTEM_TYPE_JAVA is an ET system written in Java with a different layout of the shared memory.
uint32_t	majorVersion
	Major version number of this ET software release.
uint32_t	minorVersion
	Minor version number of this ET software release.
uint32_t	numSelectInts
	Number of station selection integers per event.
uint32_t	headerByteSize
	Total size of a single event's "header" or metadata structure in bytes.
uint64_t	eventByteSize
	Total size of a single event's data memory in bytes.
uint64_t	headerPosition
	Number of bytes past beginning of shared memory that the headers are stored.
uint64_t	dataPosition
	Number of bytes past beginning of shared memory that the data are stored.
uint64_t	totalSize
	Total size of shared (mapped) memory (must be allocated in pages).
uint64_t	usedSize
	Desired size of shared memory given as arg to et_mem_create .

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Detailed Description

Structure containing info stored at front of shared or mapped memory.

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Field Documentation

uint32_t et_mem_t::byteOrder

Should be 0x01020304, if not, byte order is reversed from local order.

uint64_t et_mem_t::dataPosition

Number of bytes past beginning of shared memory that the data are stored.

uint64_t et_mem_t::eventByteSize

Total size of a single event's data memory in bytes.

uint32_t et_mem_t::headerByteSize

Total size of a single event's "header" or metadata structure in bytes.

uint64_t et_mem_t::headerPosition

Number of bytes past beginning of shared memory that the headers are stored.

uint32_t et_mem_t::majorVersion

Major version number of this ET software release.

uint32_t et_mem_t::minorVersion

Minor version number of this ET software release.

uint32_t et_mem_t::numSelectInts

Number of station selection integers per event.

uint32_t et_mem_t::systemType

Type of local system using the shared memory: ET_SYSTEM_TYPE_C is an ET system written in C, and ET_SYSTEM_TYPE_JAVA is an ET system written in Java with a different layout of the shared memory.

uint64_t et_mem_t::totalSize

Total size of shared (mapped) memory (must be allocated in pages).

Referenced by et_system_start().

uint64_t et_mem_t::usedSize

Desired size of shared memory given as arg to et_mem_create .

Referenced by et_system_start().

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The documentation for this struct was generated from the following file:

• et_private.h