DragonFly commits List (threaded) for 2005-05
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Re: cvs commit: src/lib/libc/gen Makefile.inc errlst.c src/lib/libc/i386/sys cerror.S ptrace.S src/lib/libc/sys Makefile.inc __error.c src/lib/libc_r/sys Makefile.inc uthread_error.c src/lib/libc_r/uthread Makefile.inc ...
On Tue, May 03, 2005 at 11:14:59AM -0700, Matthew Dillon wrote:
>
> :I'm not sure if we can make e.g. strtok simply thread safe by using
> :TLS, but I want to use it to get e.g. the resolver fully thread-safe.
> :This is also the right time to work on our NSS implementation. Once
> :that works, we can move rpc, yp and perhaps even the resolver out of
> :libc.
> :
> :Joerg
>
> Sure we can:
>
> char *
> strtok(char *s, const char *delim)
> {
> static char *last;
>
> return strtok_r(s, delim, &last);
> }
>
> To
>
> char *
> strtok(char *s, const char *delim)
> {
> __thread static char *last;
>
> return strtok_r(s, delim, &last);
> }
>
> Poof. Thread safe.
But with a different semantic in a threaded environment.
That's why we have to be a bit careful. Unlikely to be a
problem here, but something we have to keep in mind.
Joerg
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