[GRASS-dev] [GRASS GIS] #2879: grass.script.array cannot read raster on Windows

[GRASS GIS]

#2879: grass.script.array cannot read raster on Windows
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  Reporter:  annakrat     |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  critical     |  Milestone:  7.0.4
 Component:  Python       |    Version:  svn-trunk
Resolution:               |   Keywords:  wingrass, numpy
       CPU:  Unspecified  |   Platform:  MSWindows 8
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Comment (by glynn):

 > This file is created when the array is initialized and it is open, so on
 Windows no other process can write to it.

 It's possible for multiple processes to write to the same file, but that
 may require specifying additional flags (which neither the underlying
 numpy.memmap constructor nor Python's mmap.mmap constructor appear to
 support). OTOH, it's also possible that Windows doesn't allow writing to
 files which are memory-mapped.

 It isn't possible to avoid opening the file in the constructor, so the
 only other option would be to optionally pass the mapname and null
 parameters to the constructor and have the constructor call the read()
 method before calling the parent constructor.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2879#comment:3>
GRASS GIS <https://grass.osgeo.org>