meh@wucs1.wustl.edu (Mark E Hunter) (02/22/90)
Hi, Got a question for the ADA gurus here. I am sure someone has asked it before. I am running an ADA multitasking program under Sunview on a sun workstation. Very often, the program crashes. This appears to happen when an ADA task picks up an alarm meant for Sunview. What is going on here? Any ideas, explanations, and solutions would be graciously accepted. Mark E. Hunter meh@wucs1.wustl.edu
billwolf%hazel.cs.clemson.edu@hubcap.clemson.edu (William Thomas Wolfe, 2847 ) (02/22/90)
From meh@wucs1.wustl.edu (Mark E Hunter): > I am running an > ADA multitasking program under Sunview on a sun > workstation. Very often, the program crashes. This > appears to happen when an ADA task picks up an > alarm meant for Sunview. What is going on here? If you are using the Telesoft compiler, section 1.2.3.1 of the Software Extensions User Guide specifically states (page 1-3) that "The Ada run-time kernel uses SIGALARM for implementing DELAY statements, timed ENTRY calls, and selective waits with DELAY alternatives. [...] When the SunView notifier is called... it issues a system call that will replace the Ada kernel's timer interrupt handler with its own. [...] In future releases, a special version of the Ada run-time kernel that cooperates with the SunView kernel will be included in the SunView Bindings sublibrary. That kernel will allow full use of Ada tasking with SunView." Bill Wolfe, wtwolfe@hubcap.clemson.edu