From: ytomino <aghia05@gmail.com>
Subject: Re: Interfaces.C.Strings chars_ptr memory management strategy
Date: Sun, 3 Jun 2018 13:03:21 -0700 (PDT)
Date: 2018-06-03T13:03:21-07:00 [thread overview]
Message-ID: <8816050d-27e6-42e2-b6e8-fd85b31e8e04@googlegroups.com> (raw)
In-Reply-To: <pf1fps$4rv$1@gioia.aioe.org>
On Monday, June 4, 2018 at 4:33:20 AM UTC+9, Dmitry A. Kazakov wrote:
> On 2018-06-03 20:31, ytomino wrote:
> > Perhaps, malloc is better than New_String in this case.
> >
> > function malloc (s : Interfaces.C.size_t) return Interfaces.C.Strings.chars_ptr
> > with Import, Convention => C;
>
> I had a case when that caused the application crashed.
>
> I guess it was because of mixed Visual Studio and GCC run-times. The
> pointer returned by the malloc from one was freed in a third-party C
> library by another.
>
> --
> Regards,
> Dmitry A. Kazakov
> http://www.dmitry-kazakov.de
What!?
New_String calls malloc in the end, too, in mingw runtime.
(It calls Memory_Alloc, Memory_Alloc is _gnat_malloc, and __gnat_malloc calls malloc.)
https://gcc.gnu.org/svn/gcc/trunk/gcc/ada/libgnat/i-cstrin.adb
https://gcc.gnu.org/svn/gcc/trunk/gcc/ada/libgnat/s-parame.ads
https://gcc.gnu.org/svn/gcc/trunk/gcc/ada/libgnat/s-memory__mingw.adb
If Interfaces.C.Strings.Free (malloc) is crashed, New_String would be same.
next prev parent reply other threads:[~2018-06-03 20:03 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-25 22:22 Interfaces.C.Strings chars_ptr memory management strategy NiGHTS
2018-05-26 2:52 ` Shark8
2018-05-26 12:44 ` NiGHTS
2018-05-26 13:56 ` Shark8
2018-05-30 13:10 ` Alejandro R. Mosteo
2018-05-30 19:56 ` Randy Brukardt
2018-05-31 10:34 ` Alejandro R. Mosteo
2018-05-31 22:25 ` Randy Brukardt
2018-06-05 12:42 ` Alejandro R. Mosteo
2018-06-03 18:31 ` ytomino
2018-06-03 19:33 ` Dmitry A. Kazakov
2018-06-03 20:03 ` ytomino [this message]
2018-06-04 7:06 ` Dmitry A. Kazakov
2018-06-04 7:47 ` ytomino
2018-06-03 20:37 ` ytomino
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