[Oorexx-bugs] [ oorexx-Bugs-2821033 ] Incompatible event semaphore function results

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Bugs item #2821033, was opened at 2009-07-13 17:57
Message generated for change (Settings changed) made by miesfeld
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Doug Lorch (douglorch)
>Assigned to: Mark Miesfeld (miesfeld)
Summary: Incompatible event semaphore function results

Initial Comment:
 1. In 4.0.0, e=SysOpenEventSem(xx) returns "00000000" whereas in previous releases it returned "0" when the event does not exist, which means "e==0" now fails.

 2. In 4.0.0, e=SysCreateEventSem(xx) returns a hex string (e.g., "000001B8") whereas in previous releases it returned a decimal number, which means "datatype(e,'w')" now fails.

REXX-ooRexx_4.0.0(MT) 6.03 30 Jun 2009.
Up to date Vista.

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Comment By: Mark Miesfeld (miesfeld)
Date: 2009-07-13 20:52

Message:
The documentation for SysOpenEventSem() and SysCreateEventSem() say that
the return is a "handle".

Handles are opaque types and as such should only be used as arguments in
functions calls that specify they take a "handle" as an argument.  In
particular this means that using it in a call to datatype() is incorrect.

However, there does need to be a return that signals failure.  This is
complicated here by the fact that the earlier implementation of functions
that return handles sometimes used a return of 0 and sometimes a return of
"" to signal failure.

I'll have to talk this over with Rick to see how he wants to handle this.

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