Re: [Iverilog-devel] Fopen the same file twice for writeing?

[Michael S. <mic...@gm...>]

Your test is very wrong. Why do you open the same file in different "always"
blocks?

ncverilog:

ncsim: *W,VFOPTW: File test.txt being opened by Initial stmt (file:
./test.v, line: 8 in worklib.tt [module]) has been opened earlier.
ncsim: *W,VFOPTW: File test.txtb being opened by Initial stmt (file:
./test.v, line: 22 in worklib.tt [module]) has been opened earlier.
ncsim: *W,VFOPTW: File test.txtc being opened by Initial stmt (file:
./test.v, line: 34 in worklib.tt [module]) has been opened earlier.

> cat test.txt; rm test.txt
second
second after first is closed

> cat test.txtb; rm test.txtb
second
second after first is closed

> cat test.txtc; rm test.txtc
first

vcs :
> cat test.txt; rm test.txt
second
second after first is closed

> cat test.txtb; rm test.txtb
second
second after first is closed

> cat test.txtc; rm test.txtc
first



2009/5/27 Andrei Purdea <pur...@gm...>

> Hello!
> I have found a weird modelsim behavior where if you open the same
> filename twice with the one-parameter (multichannel descriptor) $fopen
> then one of the fopens will not overwrite the other one, but instead
> both outputs end up in the output file.
>
> Iverilog behaves the way i'd expect it to.
>
> Do other simulators behave like modelsim?
>
> (result of the attached .v file)
> iverilog:(all versions)
>
> andrew@charon:~$ cat test.txt; rm test.txt
> second
> second after first is closed
> andrew@charon:~$ cat test.txtb; rm test.txtb
> second
> second after first is closed
> andrew@charon:~$ cat test.txtc; rm test.txtc
> first
>
>
> modelsim:
>
> andrew@charon:~$ cat test.txt; rm test.txt
> first
> second
> andrew@charon:~$ cat test.txtb; rm test.txtb
> second
> second after first is closed
> andrew@charon:~$ cat test.txtc; rm test.txtc
> first
> second
>
>
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