MPE/iX Intrinsics Reference Manual (32650-90875)

474 Chapter8
Command Definitions (HPMERGEEND-LOGSTATUS)
IODONTWAIT
Operation Notes
The IODONTWAIT intrinsic operates the same as IOWAIT with one exception: if you call
IOWAIT and no I/O has completed, then the calling process is suspended until some I/O
completes; if you call IODONTWAIT and no I/O has completed, then control is returned to the
calling process. (CCE (2) is returned and the result of IODONTWAIT is zero.)
Condition Codes
CCE (2) Request granted. If the functional return is not zero, then I/O completion
occurred with no errors. If the functional return is zero, no I/O has
completed.
CCG (0) An end-of-file was encountered.
CCL (1) Request denied. Normal I/O completion did not occur; there were no I/O
requests pending, a parameter error occurred, or an abnormal I/O
completion occurred.
Related Information
Manual Interprocess Communication Programmer's Guide