I think the concern was over a FAST POST, which can be safely done using a simple CS instruction. This can be done because the system WAIT process uses a CS to set the WAIT indicator bit and RB address in the ECB. Either your code sets the POST bit or their code sets the WAIT bit depending on who gets there first.
See example code in the Authorizer Assembler Services Guide on about pg. 54 Chris Blaicher Technical Architect Mainframe Development Syncsort Incorporated 50 Tice Boulevard, Woodcliff Lake, NJ 07677 P: 201-930-8234 | M: 512-627-3803 E: [email protected] www.syncsort.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Jerry Callen Sent: Thursday, June 2, 2016 11:43 AM To: [email protected] Subject: Re: SUSPEND/RESUME is slower than WAIT/POST. PAUSE/RELEASE is slower than both. Edward Jaffe wrote: > Stated as simply as I can: If the POST bit is already on, why call the > WAIT service in the first place? All it's gonna do is immediately return. Yes, that's clear. What always gets my knickers twisted is when you can RESET the ECB and be sure you don't lose an event. I think I've convinced myself that, in this simple ping-pong case, just testing the post bit will work. Maybe I'll run THAT test, too. This is why I prefer data parallel programming to thread parallel programming; it makes my head hurt less. -- Jerry ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ________________________________ ATTENTION: ----- The information contained in this message (including any files transmitted with this message) may contain proprietary, trade secret or other confidential and/or legally privileged information. Any pricing information contained in this message or in any files transmitted with this message is always confidential and cannot be shared with any third parties without prior written approval from Syncsort. This message is intended to be read only by the individual or entity to whom it is addressed or by their designee. If the reader of this message is not the intended recipient, you are on notice that any use, disclosure, copying or distribution of this message, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and/or Syncsort and destroy all copies of this message in your possession, custody or control. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
