diff options
Diffstat (limited to 'nuttx/sched/os_start.c')
| -rw-r--r-- | nuttx/sched/os_start.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/nuttx/sched/os_start.c b/nuttx/sched/os_start.c index 41fc735e3..440fdb6c3 100644 --- a/nuttx/sched/os_start.c +++ b/nuttx/sched/os_start.c @@ -461,13 +461,24 @@ void os_start(void) sdbg("Beginning Idle Loop\n"); for (;;) { - /* Peform garbage collection (if it is not being done by the worker - * thread. This cleans-up memory de-allocations that was queued - * because it could not be freed in that execution context (for + /* Perform garbage collection (if it is not being done by the worker + * thread). This cleans-up memory de-allocations that were queued + * because they could not be freed in that execution context (for * example, if the memory was freed from an interrupt handler). */ -#ifndef CONFIG_SCHED_WORKQEUE - sched_garbagecollection(); + +#ifndef CONFIG_SCHED_WORKQUEUE + /* We must have exclusive access to the memory manager to do this + * BUT the idle task cannot wait on a semaphore. So we only do + * the cleanup now if we can get the semaphore -- this should be + * possible because if the IDLE thread is running, no other task is! + */ + + if (mm_trysemaphore() == 0) + { + sched_garbagecollection(); + mm_givesemaphore(); + } #endif /* Perform any processor-specific idle state operations */ |