+// cause all capabilities to context switch as soon as possible.
+void setContextSwitches(void);
+
+// Free a capability on exit
+void freeCapability (Capability *cap);
+
+// FOr the GC:
+void markSomeCapabilities (evac_fn evac, void *user, nat i0, nat delta);
+void markCapabilities (evac_fn evac, void *user);
+void traverseSparkQueues (evac_fn evac, void *user);
+