OS_Args 4 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Args 15 – SWI Calls
» OS_Args 4OS
» OS_Args
» OS_Args 4
OS_Args 4
(SWI &09)
| Entry | |
|---|---|
| R0 | 4 (reason code) |
| R1 | File handle |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved |
| R2 | Allocated size of the file in bytes |
Use
The purpose of this call is to return the allocated size of a file.
Notes
The call returns the space set aside on the media for the given handle, regardless of its extent. Often this will be larger, for example to avoid fragmenting open files.
The value return will always be equal to, or greater than the file extent.
See also
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