[Mingw-notify] [ mingw-Patches-2813052 ] Fix usleep interval rounding

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Patches item #2813052, was opened at 2009-06-26 17:43
Message generated for change (Tracker Item Submitted) made by jll544
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Category: runtime
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jeff Lu (jll544)
Assigned to: Nobody/Anonymous (nobody)
Summary: Fix usleep interval rounding

Initial Comment:
MinGW usleep(useconds) calls Sleep(useconds/1000).  When useconds < 1000, the resulting Sleep(0) can return almost immediately.  This behavior can result in excessive CPU usage when usleep is used inside a loop.  According to standards, the correct behavior is to round up the sleep interval when necessary.  http://www.opengroup.org/onlinepubs/000095399/functions/usleep.html

2009-06-26 Jeff Lu <jll544 at yahoo.com>

* mingwex/usleep.c: round up to next ms

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