Server Guide
VisualAge for Smalltalk Server provides call-in support for the most common
high-level languages (HLLs). Supported HLLs are:
- COBOL
- C/370
- PL/I (OS/390 only)
Call-in support provides application developers with significant new
capability to call Smalltalk applications from legacy HLL applications.
HLL programs can now call host Smalltalk applications directly by using
standard OS/390 and workstation inter-language calling conventions.
This support provides several significant benefits:
- Improved performance
- You can use new HLL function calls to start and stop execution of an image
without incurring the overhead of image initialization each time. This
approach makes it possible to create efficient, long-running application
scenarios, particularly in an OS/390 Native (batch) environment.
- Flexibility
- You can call any class method in the Smalltalk image from an HLL
program.
- Efficient interaction
- By using the supported call-in parameters, you can share data between the
HLL application and the Smalltalk image.
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