On Jun 09, 2006, at 6:56 AM, Jonathan Johnson wrote:
On Jun 8, 2006, at 10:44 PM, Norman Palardy wrote:
I have a function in a library I'm trying to call and it has a
parameter that is a ** param
the function is like this
int f(Msg **res)
So I thought I'd declare it like
soft declare function f lib "mylib" (Byref res as Ptr ) as integer
and call it like
const kSuccess = 0
dim mb2 as new MemoryBlock(4)
dim results as new MemoryBlock(4)
mb2.Ptr(0) = results
if f( mb2 ) = kSUCCESS then
This fails because you're passing a memoryblock, not a Ptr. The
MemoryBlock is converted to a Ptr, and if REALbasic allowed passing
the result byref, it wouldn't behave as you'd hope -- the temporary
variable would be passed byref, not the Ptr that the MemoryBlock
contained.
However, it appears you've set this up properly except for
specifying Byref in the declare statement. By linking one
memoryblock to another using Ptr(), you're creating the extra
"byref" yourself. That's the proper way to handle this situation.
So, simply removing Byref should work.
I have it working using integers byref
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