Re: [PATCH] libpthread NOLOAD removal

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

> Here is my llatest patch for libpthread NOLOAD removal. It implements
> minimal mutex, condvar and rwlock operations in libc thread stubs, so
> that theses objects can be handled by both libc and libpthread after
> libpthread has been loaded by dlopen.
> 
> http://ftp.espci.fr/shadow/manu/pthread5.patch
> 

what "ptm->ptm_owner = (thr_t) -1" means?

YAMAMOTO Takashi

> Performance hit has been evaluated: it is not significant for running
> NetBSD's build.sh. On a billion calls to gmtime(), I get a 1%
> performance hit.
> 
> Note that we catch calls to pthread_create() for programs not linked
> with -lpthread and we abort, since we cannot reliabily support that for
> now. We could do it if we move the full mutex, condvar and rwlock
> operations from libthread to libc. Since that would bump library
> versions, I suggest it could be done in a second step, so that the first
> step (minimal operation in libc stubs) can be backported to netbsd-6.
> 
> -- 
> Emmanuel Dreyfus
> http://hcpnet.free.fr/pubz
> manu%netbsd.org@localhost