+/* -----------------------------------------------------------------------------
+ * Mark all nodes pointed to by sparks in the spark queues (for GC) Does an
+ * implicit slide i.e. after marking all sparks are at the beginning of the
+ * spark pool and the spark pool only contains sparkable closures
+ * -------------------------------------------------------------------------- */
+
+#ifdef THREADED_RTS
+static void
+markSparkQueue (evac_fn evac, Capability *cap)
+{
+ StgClosure **sparkp, **to_sparkp;
+ nat n, pruned_sparks; // stats only
+ StgSparkPool *pool;
+
+ PAR_TICKY_MARK_SPARK_QUEUE_START();
+
+ n = 0;
+ pruned_sparks = 0;
+
+ pool = &(cap->r.rSparks);
+
+ ASSERT_SPARK_POOL_INVARIANTS(pool);
+
+#if defined(PARALLEL_HASKELL)
+ // stats only
+ n = 0;
+ pruned_sparks = 0;
+#endif
+
+ sparkp = pool->hd;
+ to_sparkp = pool->hd;
+ while (sparkp != pool->tl) {
+ ASSERT(*sparkp!=NULL);
+ ASSERT(LOOKS_LIKE_CLOSURE_PTR(((StgClosure *)*sparkp)));
+ // ToDo?: statistics gathering here (also for GUM!)
+ if (closure_SHOULD_SPARK(*sparkp)) {
+ evac(sparkp);
+ *to_sparkp++ = *sparkp;
+ if (to_sparkp == pool->lim) {
+ to_sparkp = pool->base;
+ }
+ n++;
+ } else {
+ pruned_sparks++;
+ }
+ sparkp++;
+ if (sparkp == pool->lim) {
+ sparkp = pool->base;
+ }
+ }
+ pool->tl = to_sparkp;
+
+ PAR_TICKY_MARK_SPARK_QUEUE_END(n);
+
+#if defined(PARALLEL_HASKELL)
+ debugTrace(DEBUG_sched,
+ "marked %d sparks and pruned %d sparks on [%x]",
+ n, pruned_sparks, mytid);
+#else
+ debugTrace(DEBUG_sched,
+ "marked %d sparks and pruned %d sparks",
+ n, pruned_sparks);
+#endif
+
+ debugTrace(DEBUG_sched,
+ "new spark queue len=%d; (hd=%p; tl=%p)\n",
+ sparkPoolSize(pool), pool->hd, pool->tl);
+}
+#endif
+