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clean up the implementation of the new memfiles.resize

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This commit is contained in:
Araq 2018-12-12 12:10:17 +01:00
commit f828e5da49
1 changed files with 27 additions and 27 deletions
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14
lib/pure/memfiles.nim
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@ -282,13 +282,13 @@ proc flush*(f: var MemFile; attempts: Natural = 3) =
if lastErr != EBUSY.OSErrorCode:
raiseOSError(lastErr, "error flushing mapping")
proc resize*(f: var MemFile, newFileSize: int) =
## resize and re-map the file underlying an ``allowRemap MemFile``. NOTE:
## this assumes the entire file is mapped read-write at offset zero. Also,
## the value of ``.mem`` will probably change.
when defined(windows):
discard #TODO This needs to be implemented.
else:
when defined(posix) or defined(nimdoc):
proc resize*(f: var MemFile, newFileSize: int) {.raises: [IOError, OSError].} =
## resize and re-map the file underlying an ``allowRemap MemFile``.
## **Note**: this assumes the entire file is mapped read-write at offset zero.
## Also, the value of ``.mem`` will probably change.
## **Note**: This is not (yet) avaiable on Windows.
when defined(posix):
if f.handle == -1:
raise newException(IOError,
"Cannot resize MemFile opened with allowRemap=false")