Messages in this thread | | | Date | Thu, 19 Apr 2001 09:46:17 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: light weight user level semaphores |
| |
On Thu, 19 Apr 2001, Alan Cox wrote: > > can libraries use fast semaphores behind the back of the user? They might > > well want to use the semaphores exactly for things like memory allocator > > locking etc. But libc certainly cant use fd's behind peoples backs. > > libc is entitled to, and most definitely does exactly that. Take a look at > things like gethostent, getpwent etc etc.
Ehh.. I will bet you $10 USD that if libc allocates the next file descriptor on the first "malloc()" in user space (in order to use the semaphores for mm protection), programs _will_ break.
You want to take the bet?
Linus
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |