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Restrictions

Some library functionality is restricted or unavailable when the all-resident library is used. The following restrictions apply to all-resident programs:

• The interlanguage communication feature described in the SAS/C Compiler Interlanguage Communication Feature User's Guide cannot be used. However, calls to and from assembler language programs are supported.

• The REXX function package support feature cannot be used. An all-resident program cannot call the cmsrxfn function.

• Socket support cannot be made resident unless the IBM TCP/IP product is used. If you need the ability to use TCP/IP support from a vendor other than IBM, you should avoid the all-resident library, or define the ALLOW_TRANSIENT symbol to allow the necessary code to be loaded at runtime.

• Under an extended architecture system, all-resident programs cannot be loaded above the 16-megabyte line. Programs must be linked with RMODE=24. However, 31-bit addressing (AMODE=31) is supported.

• Regardless of reentrancy considerations, all-resident programs must be processed with the COOL object code preprocessor.

• The <resident.h> header file should only be included in one source module per load module.

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