Chapter 5: C Routines Reference

JagNewSharedData

Description

Create a shared variable with a specified name or retrieve the handle for the existing variable with the specified name.

Syntax

JagStatus JagNewSharedData (
            JagDataCollection * pCollection,
            SQLPOINTER name,
            JagBoolean * pExists,
            JagSharedData ** ppProp)

Parameters

pCollection: The handle of the collection in which you want to create the shared variable.

name: The name of the shared variable.

ppProp: The shared variable handle.

pExists

The address of a JagBoolean status variable. *pExists is set to one of the following values:

Return value	To indicate
JAG_TRUE	If a shared variable with the specified name already exists
JAG_FALSE	If a shared variable with the specified name is created

Returns

Return value	To indicate
JAG_SUCCEED	Success
JAG_FAIL	Failure

Check the server’s log file for more information when JagNewSharedData fails.

Usage

The JagNewSharedData creates a shared variable with the specified name or returns a reference to the existing shared variable. Newly created variables are initialized to NULL and a reference to the new variable is returned.

Shared variables are either named or indexed. Named variables are created with JagNewSharedData and retrieved with JagGetSharedData. Indexed variables are created with JagNewSharedDataByIndex and retrieved with JagGetSharedDataByIndex.

Named shared variables are uniquely identified by the collection which contains them (see JagGetCollection) and the name assigned when the property is created with JagNewSharedData.

See Appendix C, “Creating C Components,” in the EAServer Programmer’s Guide for more information.