From ddb16207e736647ee5b1f023c1b8810effa18234 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Tue, 15 Nov 2016 20:18:59 -0800 Subject: altos/lisp: re-use small frames This saves a pile more use of the allocator by noting when frames have not been referenced from another frame and freeing them when they go out of scope. Frames with references are left to the allocator to deal with. Signed-off-by: Keith Packard --- src/lisp/ao_lisp_eval.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'src/lisp/ao_lisp_eval.c') diff --git a/src/lisp/ao_lisp_eval.c b/src/lisp/ao_lisp_eval.c index 3af56796..6f56a120 100644 --- a/src/lisp/ao_lisp_eval.c +++ b/src/lisp/ao_lisp_eval.c @@ -122,7 +122,8 @@ ao_lisp_stack_push(void) static void ao_lisp_stack_pop(void) { - ao_poly prev; + ao_poly prev; + struct ao_lisp_frame *prev_frame; if (!ao_lisp_stack) return; @@ -131,10 +132,13 @@ ao_lisp_stack_pop(void) ao_lisp_stack_free_list = ao_lisp_stack; ao_lisp_stack = ao_lisp_poly_stack(prev); + prev_frame = ao_lisp_frame_current; if (ao_lisp_stack) ao_lisp_frame_current = ao_lisp_poly_frame(ao_lisp_stack->frame); else ao_lisp_frame_current = NULL; + if (ao_lisp_frame_current != prev_frame) + ao_lisp_frame_free(prev_frame); DBG_OUT(); DBGI("stack pop\n"); DBG_FRAMES(); -- cgit v1.2.3