> -----Ursprungligt meddelande----- > Från: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] För > Scott Fagen > Skickat: den 9 februari 2010 19:47 > Till: IBM-MAIN@bama.ua.edu > Ämne: Re: About ENQ - some basic questions > > On Tue, 9 Feb 2010 16:49:05 +0100, Thomas Berg <thomas.b...@swedbank.se> > wrote: > -snip- > >But if You e g do an allocation in the same rexx its ENQ is kept > >thru the entire TSO session or until You free the dataset. > >Does this mean that the ENQ in this case is assigned to the main > >task (TSO) or is there another mechanism in work ? > -snip- > > Allocation ENQs are assigned to the JSTCB which is not necessarily the > task > that issued the DYNALLOC/SVC 99. > > REXX is blissfully unaware of ENQs issued by utilities that it calls. > Each > has its own semantic for dealing with the release of the ENQ. > > Scott Fagen > CA Mainframe BU
I interpreted the text in Assembler Services Reference: ENQ assigns control of one or more serially reusable resources to a task. If any of the resources are not available, the task might be placed in a wait condition until all of the requested resources are available. Once control of a resource has been assigned to a task, it remains with that task until one of the programs running under that task issues a DEQ macro to release the resource or the task terminates. ..that it's inherent to the ENQ function to release itself at end of the task. Did I misunderstood this ? How do You control which task the ENQ is assigned to ? TIA Regards, Thomas Berg __________________________________________ Thomas Berg Specialist IT-U SWEDBANK ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
