[GRASS-dev] Re: locking on a raster

[Ivan Shmakov]

>>>>> Glynn Clements <glynn at gclements.plus.com> writes:

[...]

 >> It seems that you've missed my point.  I wish to process the whole
 >> raster with G_get_raster_row () once, and then another time from the
 >> start.  The only way to do it that I know is to close and re-open
 >> it, which is ``a different issue'', indeed.

 > No, there's no need to re-open it (or otherwise "rewind" it).

 > G_get_raster_row() takes the row number as an argument; nothing
 > requires that you read the rows sequentially, or that you read each
 > row only once.

	Indeed.

	What about a dup ()?  The intent is to have two parts of code
	run in a quite intertwined manner.  It's not known which part
	will finish earlier, and I had in mind dup ()-ing the
	descriptor, so that each part could close it on its own when
	finished.

[...]