This is our endless discussion. «Filehandles cannot be made 'shared'», maybe in your OS it works, not in the OS's i've tested. When you clone the Filehandle you are assuming that OS will sync the File->writes without any race conditions problems, but that is not true.

Updated:

This is what happens when removing the sleep()'s:

 1: The time is 1258377733.481062
 1: The time is 1258377733.481164
 1: The time is 1258377733.481337
 1: The time is 1258377733.4 3: The time is 1258377733.473267
 3: The time is 1258377733.473595
 3: The time is 1258377733.473749
 3: The time is 1258377733.473885
 3: The time is 1258377733.474008
 3: The time is 1258377733.474110
 3: The time is 1258377733.474212
 3: The time is 1258377733.474313

[download]

In high concurrency level, the problems appear.

«A contentious debate is always associated with a lack of valid arguments.»

In reply to Re^4: [threads] Open a file in one thread and allow others to write to it by gulden
in thread [threads] Open a file in one thread and allow others to write to it by Gangabass

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