[Haskell-cafe] HDBC-postgresql and safe/unsafe FFI calls

Jason Dagit dagit at codersbase.com
Thu Sep 2 00:47:25 EDT 2010

On Wed, Sep 1, 2010 at 7:40 PM, David Powell <david at drp.id.au> wrote:
> Greetings,
> I'm having an issue with the HDBC-postgresql package that requires me to
> manually patch it before installation for most of my use cases.
> All the FFI calls in this package are marked "unsafe".  Unfortunately, this
> means that whenever I issue a slow sql query, all other processing stops.
> In most places that I want to use this module, I've had to manually patch it
> to at least mark the PQexec and PQexecParams calls as "safe".
> Is there any reason these calls should not be marked as "safe"?  I
> understand that there a little extra runtime overhead with this, but I'd
> have thought that negligible given all the other processing that goes on
> with these particular calls under the hood.

Have you read this?

Perhaps it answers your questions?


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