Re: [RFC,PATCH] Do not GC_INIT the Boehm GC if already initialized

[Ludovic Courtès]

Hi Maxime,

Maxime Devos <maximedevos@telenet.be> skribis:

>> [RFC,PATCH] Do not GC_INIT the Boehm GC if already initialized
> On 06-02-2023 19:34, Jose E. Marchesi wrote:
>> Hello Guile hackers.
>> We are in the process of integrating GNU poke[1] in GDB by mean of
>> libpoke.
>> Problem is, libpoke uses the Boehm GC, as guile does.  We are
>> working on
>> switching to an ad-hoc exact collector, but it will get some time.
>> So, in the interim, we may:
>> 1) Make both libguile and libpoke to do GC_INIT conditionally, only
>> if
>>     no one else has initialized the collector before.  This is already in
>>     poke master.  A suggested (untested!) patch for guile below. > [...]
>
> According to the Boehm GC documentation, this 'conditional
> initialisation' is unnecessary:
>
> /* Portable clients should call this at the program start-up.  More   */
> /* over, some platforms require this call to be done strictly from the*/
> /* primordial thread.  **Multiple invocations are harmless.**         */
> #define GC_INIT() [...]
>
> (emphasis added).

The “Multiple invocations” bit isn’t in libgc 8.0.4.  Which version are
you looking at?

Thanks,
Ludo’.