[OT] Can global variable be passed into Python function?
invalid at invalid.invalid
Sun Mar 2 17:45:28 CET 2014
On 2014-03-02, Dave Angel <davea at davea.name> wrote:
> Grant Edwards <invalid at invalid.invalid> Wrote in message:
>> On 2014-02-24, Michael Torrie <torriem at gmail.com> wrote:
>>> Why would you think that? The address of the start of your malloc'ed
>>> structure is the same as the address of the first element. Surely
>>> this is logical?
>> Not only is it logical, the C standard explicitly requires it. Here's
>> a second-hand citation since I don't happend to have an actual copy of
>> the standard on hand:
>> C1x ???22.214.171.124.13:
>> A pointer to a structure object, suitably converted, points to
>> its initial member ... and vice versa. There may be unnamed
>> padding within a structure object, but not at its beginning.
> The quote you make from the C standard doesn't mention malloc, so
> you're arguing different things.
No, I'm not. A pointer to a structure object and a pointer to it's
first field are the same. It doesn't matter where the object came
> It's not the compiler that casts the malloc return value to the
> struct type.
That's irrelevent. The actual location of the memory containing the
struct object (static, stack, heap, shared) doesn't matter. The
address of the first field in a struture object _is_ the address of
the structure object.
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