Chapter 4: Multi-threading Compiler Directives

This chapter describes the Compiler directives you can use with multi-threading programs.

Directives for Serial and Reentrant Programs

The following two directives effect the serialization and reentrancy of multi-threaded programs:

• REENTRANT - Controls reentrancy of a program
• SERIAL - Controls serialization of a program

Directives that Optimize Performance

The following Compiler directives can optimize the performance of multi-threading programs:

• PARAMCOUNTCHECK - Controls checking of number of entry point parameters
• FASTCALLS - Controls the behavior of a called program

The following directive settings are made by default:

• PARAMCOUNTCHECK
• NOFASTCALLS
• NOREENTRANT
• NOSERIAL

If you want your program to be optimized for speed, set the directives as follows:

• NOPARAMCOUNTCHECK
• FASTCALLS
• NOREENTRANT
• NOSERIAL

However, you might have to change your program to take advantage of these Compiler directives.

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