void ponyint_gc_markactor(pony_ctx_t* ctx, pony_actor_t* actor)
{
if(actor == ctx->current)
return;
gc_t* gc = ponyint_actor_gc(ctx->current);
actorref_t* aref = ponyint_actormap_getactor(&gc->foreign, actor);
mark_remote_actor(ctx, gc, aref);
}
static void mark_remote_object(pony_ctx_t* ctx, pony_actor_t* actor,
void* p, pony_trace_fn f, bool immutable, chunk_t* chunk)
{
gc_t* gc = ponyint_actor_gc(ctx->current);
actorref_t* aref = ponyint_actormap_getorput(&gc->foreign, actor, gc->mark);
object_t* obj = ponyint_actorref_getorput(aref, p, gc->mark);
if(obj->mark == gc->mark)
return;
// Implicitly mark the owner.
mark_remote_actor(ctx, gc, aref);
// Mark the object.
obj->mark = gc->mark;
// Add to heap used size.
ponyint_heap_used(ponyint_actor_heap(ctx->current), ponyint_heap_size(chunk));
if(immutable && !obj->immutable && (obj->rc > 0))
{
// If we received the object as not immutable (it's not marked as immutable
// and it has an RC > 0), but we are now marking it as immutable, we need
// to acquire it in order to inform the owner it is now immutable. But we
// also need to continue tracing, to protect the contents until the owner
// has received the acquire messages.
obj->rc += GC_INC_MORE;
obj->immutable = true;
acquire_object(ctx, actor, p, true);
immutable = false;
} else if(obj->rc == 0) {
// If we haven't seen this object, it's an object that is reached from
// another immutable object we received. Invent some references to this
// object and acquire it. This object should either be immutable or a tag.
assert(immutable || (f == NULL));
if(immutable)
obj->immutable = true;
obj->rc += GC_INC_MORE;
acquire_object(ctx, actor, p, obj->immutable);
}
if(!immutable)
recurse(ctx, p, f);
}
static void mark_remote_object(pony_ctx_t* ctx, pony_actor_t* actor,
void* p, pony_type_t* t, int mutability)
{
gc_t* gc = ponyint_actor_gc(ctx->current);
actorref_t* aref = ponyint_actormap_getorput(&gc->foreign, actor, gc->mark);
object_t* obj = ponyint_actorref_getorput(aref, p, gc->mark);
if(obj->mark == gc->mark)
return;
// Implicitly mark the owner.
mark_remote_actor(ctx, gc, aref);
// Mark the object.
obj->mark = gc->mark;
if((mutability == PONY_TRACE_IMMUTABLE) && !obj->immutable && (obj->rc > 0))
{
// If we received the object as not immutable (it's not marked as immutable
// and it has an RC > 0), but we are now marking it as immutable, we need
// to acquire it in order to inform the owner it is now immutable. But we
// also need to continue tracing, to protect the contents until the owner
// has received the acquire messages.
obj->rc += GC_INC_MORE;
obj->immutable = true;
acquire_object(ctx, actor, p, true);
// Set the to PONY_TRACE_MUTABLE to force recursion.
mutability = PONY_TRACE_MUTABLE;
} else if(obj->rc == 0) {
// If we haven't seen this object, it's an object that is reached from
// another immutable object we received, or it's a pointer to an embedded
// field received in an iso. Invent some references to this object and
// acquire it.
if(mutability == PONY_TRACE_IMMUTABLE)
obj->immutable = true;
obj->rc += GC_INC_MORE;
acquire_object(ctx, actor, p, obj->immutable);
}
if(mutability == PONY_TRACE_MUTABLE)
recurse(ctx, p, t->trace);
}
