On Tue, 2003-07-15 at 16:11, Stas Bekman wrote:
Is this still correct in the threaded environment where the filehandle is shared across several threads?
Why would the filehandle be shared? Wouldn't you open a new handle in each thread?
Because it's shared on the OS level. You open a new perl IO handle in each thread, but I think that they all use the same filedescriptor underneath. I think Arthur was mentioning that at his ithreads talk. Need to run some tests to confirm that.
I expect this would be fine, since the behavior is enforced by the system library rather than by Perl. You can always use flock if you're feeling paranoid about it though.
Are you sure? Won't flock maintain a process-wide flag? Unless there is a special threads-aware implementation that does it right.
This is of course just rambling based on known issuws with all the other process-wide variables like cwd, chroot, environ, etc.
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