From: Jakub Jelinek <jakub@redhat.com>
To: Roland McGrath <roland@redhat.com>
Cc: Glibc hackers <libc-hacker@sources.redhat.com>
Subject: Re: [PATCH] Avoid cancellation point in pthread_mutex_lock etc. in linuxthreads
Date: Tue, 01 Apr 2003 20:17:00 -0000 [thread overview]
Message-ID: <20030401201745.GM16629@sunsite.ms.mff.cuni.cz> (raw)
In-Reply-To: <200304011950.h31JoPZ23056@magilla.sf.frob.com>
On Tue, Apr 01, 2003 at 11:50:25AM -0800, Roland McGrath wrote:
> Why __pthread_sigsuspend instead of just using INTERNAL_SYSCALL directly?
> kernel-features.h can define something about rt_sigsuspend vs sigsuspend
> for each machine.
It differs between arches.
On most arches it is
INTERNAL_SYSCALL (rt_sigsuspend, err, 2, set, _NSIG / 8);
on some for compatibility
INTERNAL_SYSCALL (sigsuspend, err, 3, 0, 0, set->__val[0]);
(with possible runtime choice) but on Alpha it is
INTERNAL_SYSCALL (sigsuspend, err, 1, set->__val[0]);
(well, looks like the same on sparc32 for pre-rtsig kernels,
apparently nobody is running < 2.2.x kernels on sparc any more).
I think best would be a special header in
linuxthreads/sysdeps/unix/sysv/linux/*
and inline the call to avoid the call/return overhead.
Jakub
next prev parent reply other threads:[~2003-04-01 20:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-01 15:19 Jakub Jelinek
2003-04-01 19:50 ` Roland McGrath
2003-04-01 20:17 ` Jakub Jelinek [this message]
2003-04-01 20:46 ` Ulrich Drepper
2003-04-02 0:11 ` Roland McGrath
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