Memory Allocation

[Tim Roberts]

Hi All,

I'm having issues with allocating memory.  I'm doing Ben's tutorial and getting my head around allocation in Extempore vs C.
I've run into an issue, where I try to evaluate this code:

(bind-func fill_buffer_closure_zone2 10000 ;; zone size: 10KB

  (let ((region_length 1000)

        (int_buf:i64* (zalloc region_length))

        (i:i64 0))

    (lambda ()

      (dotimes (i region_length)

        (pset! int_buf i i))

      (printf "int_buf[366] = %lld\n"

              (pref int_buf 366)))))

Copied directly from http://benswift.me/2012/08/17/memory-management-in-extempore/ and get this error back.

Type Error bad numeric value 1000, should be double 

In writing this, I tried explicitly defining region_length, and it works when defined as an i64.  Interestingly, the closure signature is returned as [i32]*.  Is that because of the printf statement?

[Toby Gifford]

Hi Tim,

Yes you should explicitly type region_length as an i64 (though i'm surprised the type inferencer doesn't work in this case).

And yes, the last expression is a printf function which returns an i32, hence the closure signature.

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