Day One

Course Survey

Introduction to Language Environment

• What Is Language Environment?
• LE Services
• Invoking LE Services
• Tokens
• LE Program Management
• z/OS UNIX and POSIX
• LE Program Management, Second Pass
• LE and 64-bit Processes
• Introduction to XPLINK

LE Message Services and Running LE Programs

• Language Environment Message Handling Services
• The CEEMOUT Service
• Compiling and Linking LE Programs
• Running LE Programs
• Computer Exercise:  A First Encounter With Language Environment

More on Message Handling Services

• Message ID’s
• Loadable Text Files
• Message Tag Files
• The CEEBLDTX Exec
• Creating a Message Module Table
• The CEEMSG service
• Computer Exercise:  Using Message Files

Message Inserts and Run-Time Parameters

• Message inserts
• The CEECMI service
• The CEEMGET service
• Run-Time parameters
• Sources for run-time parameters
• The CEE3PRM service
• The CEE3PR2 service
• Computer Exercise:  Message Inserts and Run-Time Parameters

Day Two

Tokens, Return Codes, and Termination

• Token composition and decomposition: CEENCOD and CEEDCOD services
• Data types for LE services parameters
• Symbolic feedback codes
• Return values from LE services
• Enclave termination
• Determining enclave return codes
• The CEE3GRC and CEE3SRC services

User Area Fields

• The CEE3USR service

Determining the Platform and Environment Information

• The CEEGPID and CEE3INF services
• Working with environment variables: the CEEENV service

Debugging Services

• The CEE3DMP service
• CEE3DMP – Sample outputs
• The CEE3ABD service
• The CEETEST service
• Computer Exercise:  Creating an LE Dump

Storage Management Services

• Library and user storage, stack and heap storage
• Run-time parameters that influence storage management
• Library storage (stack and heap); user storage (stack and heap)
• CEEGTST, CEEFRST, CEECZST, CEECRHP, CEEDSHP, CEE3RPH
• Computer Exercise:  Using Heap Storage

Condition Handling

• Part 1 – Concepts
  • Condition Handling Concepts
• Part 2 – Using Condition Handlers
  • Setting Up for Using Your Own Condition Handlers
  • Register Condition Handlers: CEEHDLR
  • Signaling Conditions: CEESGL
• Part 3 – Writing Your Own Condition Handlers
  • Condition Handler Design
  • Possible actions in a condition handler
  • Handle cursor and Resume cursor
  • CEEMRCR, CEE3SRP, CEEMRCE, CEEGQDT, CEE3GRN, CEE3GRO, CEEITOK
  • Information Available To a Condition Handler
  • Condition Handling Tips
• Computer Exercise:  Condition Handlers

Day Three

ILC – Inter Language Communication

• Introduction
• Data Types
• Methods of Passing and Receiving Data
• Language pair considerations
• Multiple Language Applications
• Computer Exercise:  Calling Subroutines in Multiple Languages

Assembler Considerations

• Macros CEEENTRY, CEETERM, CEECAA, CEEDSA, CEEPPA
• Using System Services
• The CEELOAD macro and service
• Macros CEEFETCH, CEERELES
• AMODE Considerations
• CEEFTCH macro

Preinitialization Services (CEEPIPI) – Optional
Library Routine Retention (LRR) – Optional

Date and Time Services

• Date and time formats
• LE date and time services: CEEDATE, CEEDATM, CEEDAYS, CEEDYWK, CEEGMT, CEEGMTO, CEEISEC, CEELOCT, CEEQCEN, CEESCEN, , CEESECI, CEESECS, CEECBLDY, CEE3DLY, CEEDLYM
• The Century Window
• Date and time conflicts: COBOL, PL/I, C/370
• Computer Exercise:  Date and Time Services

LE International Support

• Services, Supported countries, languages

LE Locale Services

• Locale Concepts, Services

LE Math and Bit Manipulation Routines

LE: Miscellaneous Topics

• CICS, IMS
• Nested enclaves

XPLINK (C, C++ Users Only)

• Traditional CALL linkages
• XPLINK – Extra Performance Link

Sources of Information