XrdSsi Namespace Reference

Classes
class	ShMap
struct	ShMap_Parms

Typedefs
typedef int(*	ShMap_Hash_t) (const char *key)

Enumerations
enum	ShMap_Access { ReadOnly = 1 , ReadWrite = 2 }
	The action parameter that must be passed to the Attach() method. More...
enum	SyncOpt {   SyncOff = 0 , SyncOn , SyncAll , SyncNow ,   SyncQSz }
	Options valid for the Sync() method. More...

Variables
static const int	ShMap_4Resize = -1
XrdSysTrace	Trace

Detailed Description

This include file defines a simple key-value store interface using shared memory. This allows you to share the map with other processes in read as well as read/write mode. See the XrdSsi::ShMap teplated class within.

Typedef Documentation

ShMap_Hash_t

typedef int(* XrdSsi::ShMap_Hash_t) (const char *key)

Typedef for the optional hash computation function (see constructor)

Parameters

key	Pointer to the key whose hash is to be returned. If nil the function should return its 4-character name (e.g. {int hash; memcpy(&hash, "c32 ", sizeof(int)); return hash;}

Returns

Either the hash value of the key or the hash name as an int.

Enumeration Type Documentation

ShMap_Access

enum XrdSsi::ShMap_Access

The action parameter that must be passed to the Attach() method.

< Attach existing map for

Enumerator
ReadOnly	reading
ReadWrite	reading & writing

SyncOpt

enum XrdSsi::SyncOpt

Options valid for the Sync() method.

Enumerator
SyncOff
SyncOn
SyncAll
SyncNow
SyncQSz

Variable Documentation

ShMap_4Resize

const int XrdSsi::ShMap_4Resize = -1

static

Parameters to pass to Create(). For Resize(&parms) initialize the struct as: "ShMap_Parms parms(XrdSsi::ShMap_Parms::ForResize)" so that the default values are appropriate for resizing instead of creation.

Trace

XrdSysTrace XrdSsi::Trace

extern