use arena everywhere + bunch of cool new stuff

deprecated/jobpool.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include "collatypes.h"
+#include "cthreads.h"
+
+typedef void *jobpool_t;
+
+jobpool_t poolInit(uint32 num);
+void poolFree(jobpool_t pool);
+
+bool poolAdd(jobpool_t pool, cthread_func_t func, void *arg);
+void poolWait(jobpool_t pool);