+ ;; This is the original address at which the memory was allocated,
+ ;; which may have different alignment then what we prefer to use.
+ ;; Kept here so that when the thread dies we can releast the whole
+ ;; memory we reserved.
+ (os-address :c-type "void *" :length #!+alpha 2 #!-alpha 1)
+ #!+sb-thread
+ (os-attr :c-type "pthread_attr_t *" :length #!+alpha 2 #!-alpha 1)