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  2. RPG400-L
  3. October 2003

Re: Sleep Function


On Thursday, October 30, 2003, at 08:28 AM, MWalter@xxxxxxxxxxxxxxx wrote:

Hbnddir('QC2LE') dftactgrp(*no) actgrp(*new)
Dsleep            PR            10i 0 extproc('sleep')
D secs                          10i 0 const
D curtime         S               t
D rtn             S                   like(sleep)
D secs            S             10i 0 inz(10)
 /free
     curtime = %time();
     dsply curtime;
     rtn = sleep(secs);
     curtime = %time();
     dsply curtime;
     *inlr = *on;
 /end-free


Change the prototype for the seconds parameter to specify VALUE rather than CONST. C expects all parameters to be passed by value (except 'special' things like arrays and strings (which are just arrays anyway--and arrays are treated like pointers so C really passes the address of the array by value so now we come full circle. Man! C sucks).

You are passing seconds by constant reference (i.e., as a pointer) to the seconds value but sleep() is interpreting the first 4 bytes of the pointer as an integer and goes to sleep for a very long time since the first 4 bytes of a space pointer is something like 08000000 (which is approximately 2222 hours).

Regards,
Simon Coulter.
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