posix simulator hal_lld changes
Posted: Wed Jan 17, 2018 9:44 pm
If interrupts are too frequent, then the system tick will never happen due to the call to chSchDoReschedule(). Below is a patch to _sim_check_for_interrupts() which will ensure that the systick is always evaluated, and chSchDoReschedule() is called at the end. Originally I had included a call to nanosleep() for a short duration so that the process doesn't run at 100% CPU utilization. However, that is probably best done in CH_CFG_IDLE_LOOP_HOOK() .
Code: Select all
---
+++
@@ -1,31 +1,32 @@
void _sim_check_for_interrupts(void) {
struct timeval tv;
-
+ bool int_occurred = false;
#if HAL_USE_SERIAL
if (sd_lld_interrupt_pending()) {
- _dbg_check_lock();
- if (chSchIsPreemptionRequired())
- chSchDoReschedule();
- _dbg_check_unlock();
- return;
+ int_occured = true;
}
#endif
gettimeofday(&tv, NULL);
if (timercmp(&tv, &nextcnt, >=)) {
+ int_occurred = true;
timeradd(&nextcnt, &tick, &nextcnt);
CH_IRQ_PROLOGUE();
chSysLockFromISR();
chSysTimerHandlerI();
chSysUnlockFromISR();
CH_IRQ_EPILOGUE();
- _dbg_check_lock();
- if (chSchIsPreemptionRequired())
- chSchDoReschedule();
- _dbg_check_unlock();
}
+
+ if (int_occurred)
+ {
+ _dbg_check_lock();
+ if (chSchIsPreemptionRequired())
+ chSchDoReschedule();
+ _dbg_check_unlock();
+ }
}