Re: VFS locking: f_pos thread-safe ?

[Joel Becker]

On Fri, Feb 06, 2004 at 08:05:48PM +0100, Matthias Urlichs wrote:
> thread A reads M @N   thread B reads M @N     file pointer ends up as N+M
> thread A reads M @N   thread B reads M @M+N   file pointer ends up as N+2M
> thread A reads M @M+N thread B reads M @N     file pointer ends up as N+2M
> 
> With your description,
> thread A reads M @M+N thread B reads M @M+N   file pointer ends up as N+2M

	I didn't mean the last.  I was just writing English, and figured
everyone would know what I meant.  Obviously, the first read() in starts
@M.

Joel

-- 

Life's Little Instruction Book #198

	"Feed a stranger's expired parking meter."

Joel Becker
Senior Member of Technical Staff
Oracle Corporation
E-mail: joel.becker@xxxxxxxxxx
Phone: (650) 506-8127
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