DATA Statement

Syntax: DATA [attribute...]

This statement defines the default attributes for data segments within the application or library. One or more attributes can appear following the DATA statement:

PRELOAD or LOADONCALL

Sets when data segment is loaded

Note: OS/2 2.x ignores the preload attribute.

READONLY or READWRITE
Sets read/write access
NONE, SINGLE, or MULTIPLE
Sets sharing attributes
IOPL or NOIOPL
Sets I/O privilege
SHARED or NONSHARED
Determines whether segment is shared

Attribute Rules

• Only one attribute out of each group appears; if you specify none of the attributes in a group, the last attribute listed above for that group is generally the default. (The defaults for NONE/SINGLE/MULTIPLE and SHARED/NONSHARED vary depending on whether you are describing a dynamic-link library or application.)

• Attributes can appear in any order.

Example

The following example defines the application data segment so that it is loaded only when it is accessed and cannot be shared by more than one copy of the program. By default, the data segment can be read and written, the automatic data segment is copied for each instance of the module, and the data segment has no I/O privilege.

DATA LOADONCALL NONSHARED

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