On Wed, 19 Apr 2017, Sven Barth via fpc-pascal wrote:
Am 19.04.2017 11:26 schrieb "Ryan Joseph" <r...@thealchemistguild.com>:
On Apr 19, 2017, at 4:14 PM, Sven Barth via fpc-pascal <
fpc-pascal@lists.freepascal.org> wrote:
Those functions simply store (setjmp) and restore (longjmp) register
values (and setjmp also returns the value passed to longjmp if it had been
reached by a longjmp). Nothing more, nothing less. So while the stack
register while be changed, the contents on the stack will not.
Why doesn’t “i” in my example increment? The value keeps going back to 1
even after I used += 1 so its like the old copy of the stack before the
jump got pushed back on top and it started over. I don’t understand how
assembly works but I thought it would just start over and the state of the
stack in that function would still be the same as before so I could keep
adding 1 every pass.
Ah, I didn't catch that earlier. Probably "i" is kept in a register due to
optimization. You should check the generated assembler code to be sure.
Glad we responded the same thing :)
Michael.
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