VFPSupport_CheckContext (changes)
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» VFPSupport
» SWI Calls
» VFPSupport_CheckContext
VFPSupport_CheckContext
(SWI &58EC0)
| Entry | |
|---|---|
| R0 | Flags: |
| Bit 0: User mode flag (0=user mode access not required, 1=user mode access required) | |
| Bit 1: Application space flag (0=not in application space, 1=in application space) | |
| Bits 30-31: Ignored | |
| Other bits reserved, should be zero | |
| R1 | Number of doubleword registers required (1-32) |
| Exit | |
|---|---|
| R0 | Required size of context save area |
| All other registers preserved | |
Use
This call allows programs to check if it is possible to create a context with a given set of parameters, and how large the context save area will be (if created manually).
Notes
If it is not possible to create a context with the given features, an error will be returned.
See VFPSupport_CreateContext for more details of the flags in R0. Note that bits 30-31 of R0 are ignored, to allow the same set of flags to be passed to VFPSupport_CreateContext.
See also
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