Stack recycling is added to the thread library.

Still, it does not support thread trees which have more than one level depth.

conts/libl4thread/include/l4thread/stack.h

@@ -0,0 +1,16 @@
+/*
+ * Stack region helper routines.
+ *
+ * Copyright (C) 2009 B Labs Ltd.
+ */
+#ifndef __LIB_STACK_H__
+#define __LIB_STACK_H__
+
+int stack_pool_init(unsigned long stack_start,
+			unsigned long stack_end,
+			unsigned long stack_size);
+
+void *stack_new_space(int nitems, int size);
+int stack_delete_space(void *stack_address, int nitems, int size);
+
+#endif /* __LIB_STACK_H__ */