IBM AS/400 manual Chapter, a Service Program, Creating

Changing the Optimization Level. . . . . . . . . . . . . . . . . . . 87. . . . . .

Removing Observability . . . . . . . . . . . . . . 88. . . .

Reducing an Object's . Size. . . . . . . . . . . . . . . . . . . . . 88. . . . . .

Chapter 8.	Creating	a Service Program	. . . . . . . . . . . . . . . . .91. . . .
Service	Program	Overview. . . . . . . . . . . . . . . . . . . . . . .91

Strategies for Creating Service .Programs. . . . . . . . . . . . . . . . 92. . . . .

Creating a Service Program Using CRTSRVPGM. . . . . . . . . . . . . .92. . .

Changing A Service Program. . . . . . . . . . . . . . . . . . . . .93. . . . . .

Related CL commands . . . . . . . . . . . . . . . . . . . . . . . .93. . . . . .

Sample Service Program . . . . . . . . . . . . . . . . . . . . . . . .94. . . . . .

Creating

the

Service

Program. . . . . . . . . . . . . . . . . . . . .97

Binding

to

a

Program. . . . . . . . . . . . . . . . . . . . . . . . 98

Updating the Service Program. . . . . . . . . . . . . . . . . . . . 100

Sample

Binder

Listing. . . . . . . . . . . . . . . . . . . . . . . 100

Chapter

9.

Running

a

Program

. . . . . . . . . . . . . . . . . . . .103

Running

a

Program

Using

the

CL

CALL

Command. . . . . . . . . . . . .103. .

Passing

Parameters

using

the

CL

CALL

Command. . . . . . . . . . . 104. .

Running

a

Program

From

a

Menu-Driven

Application. . . . . . . . . . . .106. .

Running

a

Program Using a User-Created .Command. . . . . . . . . . .108. .

Replying to Run-Time Inquiry Messages. . . . . . . . . . . . . . . . .108. . . .

Ending

an

ILE

Program. . . . . . . . . . . . . . . . . . . . . . . .109

Managing

Activation

Groups. . . . . . . . . . . . . . . . . . . . . .109

Specifying an Activation Group. . . . . . . . . . . . . . . . . . . .110

Running

in the OPM Default Activation .Group. . . . . . . . . . . . 111. . .

Maintaining OPM RPG/400 and ILE RPG Program Compatibility. . . . . 111

Deleting an Activation Group. . . . . . . . . . . . . . . . . . . . 112

Reclaim Resources Command . . . . . . . . . . . . . . . . . . . .112

Managing Dynamically-Allocated Storage. . . . . . . . . . . . . . . . .113. . . .

Managing

the Default Heap Using RPG Operations. . . . . . . . . . . 113. .

Heap Storage Problems. . . . . . . . . . . . . . . . . . . . . . 118

Managing

Your

Own Heap

Using

ILE

Bindable. . .APIs. . . . . . . . 119. .

Chapter

10.

Calling

Programs

and

Procedures

. . . . . . . . . . . . .127. .

Program/Procedure Call Overview. . . . . . . . . . . . . . . . . . . .127

Calling Programs

. .

. .

. . . . . . . . . . . .128. . . .

Calling Procedures . .

. . . . . . . . . . . . . 128

The

Call

Stack. . . . . . . . . . . . . . . . . . . . . . . . . . .129

Recursive Calls . . . . . . . . . . . . . . . . 130

Parameter-Passing Considerations . . . . . . . . . . . 131

Using a Prototyped . Call. . . . . . . . . . . . . . . . . . . . . . .133

Using the CALLP Operation. . . . . . . . . . . . . . . . . . . . .133

Calling

within

an Expression. . . . . . . . . . . . . . . . . . . . .134

Examples

of

Free-Form

Call. . . . . . . . . . . . . . . . . . . . .135

Passing Prototyped Parameters. . . . . . . . . . . . . . . . . . . . 135

Parameter Passing Styles. . . . . . . . . . . . . . . . . . . . . .135

Using Operational Descriptors. . . . . . . . . . . . . . . . . . . . 138

Omitting Parameters .

. . . . . . . . . . . . . .139. . . .

Checking for the Number of Passed Parameters. . . . . . . . . . . . .141. .

Passing Less Data Than Required. . . . . . . . . . . . . . . . . . 145

Order of Evaluation. . . . . . . . . . . . . . . . . . . . . . . . .146

Interlanguage Calls . .

. . . . . . . . . . . . . 146

Interlanguage

Calling

Considerations. . . . . . . . . . . . . . . . . . 147

Contents

v