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Adding stubs for collector scheduling

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This commit is contained in:
Justin Ethier 2015-12-09 22:55:46 -05:00
parent de0c19e1cd
commit 5fa6f19418
1 changed files with 16 additions and 13 deletions
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29
gc.c
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@ -303,6 +303,14 @@ void *gc_try_alloc(gc_heap *h, size_t size, char *obj, gc_thread_data *thd)
gc_copy_obj(f2, obj, thd);
h->free_size -= gc_allocated_bytes(obj, NULL, NULL);
pthread_mutex_unlock(&heap_lock);
// TODO: initiate collection cycle if free space is too low
// TODO: cache total size (??), probably need to do that because we
// want to look at sizes across all heaps, not just this one. and
// don't want to waste a lot of time scanning heaps to just to find
// these sizes
// if (gc_stage != STAGE_RESTING) {
// }
return f2;
}
}
@ -1134,20 +1142,15 @@ fprintf(stderr, "DEBUG - after wait_handshake async\n");
void *collector_main(void *arg)
{
struct timespec tim;
tim.tv_sec = 0;
tim.tv_nsec = 100;
while (1) {
gc_collector();
// TODO: how to schedule this thread?
// this is inefficient but it should be good enough to
// at least stand up this collector. then we'll have to
// come back and improve it
//
// some ideas:
// - maybe check amount of free space in heap, and collect if less than a certain amount/percentage.
// otherwise just sleep for awhile and check again.
// once that works, might consider a way to let a mutator alert the collector that it should kick off
// - after collection, maybe grow heap if usage is above a certain percentage
//
// sleep(1);
// TODO: setup scheduling such that we transition away from resting at some point
//if (gc_stage != STAGE_RESTING) {
gc_collector();
//}
nanosleep(&tim, NULL);
}
}