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Process only one poll request at a time to avoid starvation if one process keeps calling process_poll() from its poll handler

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adamdunkels 2008-01-24 21:00:51 +00:00
parent 1b024d6e69
commit f93a48599e
1 changed files with 9 additions and 11 deletions
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20
core/sys/process.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: process.c,v 1.7 2008/01/23 21:06:25 adamdunkels Exp $
* @(#)$Id: process.c,v 1.8 2008/01/24 21:00:51 adamdunkels Exp $
*/
/**
@ -234,17 +234,15 @@ do_poll(void)
{
struct process *p;
do {
poll_requested = 0;
/* Call the processes that needs to be polled. */
for(p = process_list; p != NULL; p = p->next) {
if(p->needspoll) {
p->state = PROCESS_STATE_RUNNING;
p->needspoll = 0;
call_process(p, PROCESS_EVENT_POLL, NULL);
}
poll_requested = 0;
/* Call the processes that needs to be polled. */
for(p = process_list; p != NULL; p = p->next) {
if(p->needspoll) {
p->state = PROCESS_STATE_RUNNING;
p->needspoll = 0;
call_process(p, PROCESS_EVENT_POLL, NULL);
}
} while(poll_requested);
}
}
/*---------------------------------------------------------------------------*/
/*