From 0b11f11008362eafbce5b5211fc86766342f514a Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Wed, 18 Mar 2020 22:24:19 -0700
Subject: gc: small memory support.

* configure (small_mem): New variable.  Provide help text and
show default value of --small-mem option.  Generate
CONFIG_SMALL_MEM in config.h.

* gc.c (HEAP_SIZE, CHECKOBJ_VEC_SIZE, MUTOBJ_VEC_SIZE,
FULL_GC_INTERVAL, FRESHOBJ_VEC_SIZE, DFL_MALLOC_DELTA_THRESH):
Define conservative values of these constants if
CONFIG_SMALL_MEM is in effect.
---
 gc.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'gc.c')

diff --git a/gc.c b/gc.c
index f3a354c6..df9de0fb 100644
--- a/gc.c
+++ b/gc.c
@@ -46,12 +46,22 @@
 #include "unwind.h"
 
 #define PROT_STACK_SIZE         1024
+
+#if CONFIG_SMALL_MEM
+#define HEAP_SIZE               4096
+#define CHECKOBJ_VEC_SIZE       HEAP_SIZE
+#define MUTOBJ_VEC_SIZE         HEAP_SIZE
+#define FULL_GC_INTERVAL        20
+#define FRESHOBJ_VEC_SIZE       (2 * HEAP_SIZE)
+#define DFL_MALLOC_DELTA_THRESH (16L * 1024 * 1024)
+#else
 #define HEAP_SIZE               16384
 #define CHECKOBJ_VEC_SIZE       (2 * HEAP_SIZE)
 #define MUTOBJ_VEC_SIZE         (2 * HEAP_SIZE)
 #define FULL_GC_INTERVAL        40
 #define FRESHOBJ_VEC_SIZE       (8 * HEAP_SIZE)
 #define DFL_MALLOC_DELTA_THRESH (64L * 1024 * 1024)
+#endif
 
 #if HAVE_MEMALIGN || HAVE_POSIX_MEMALIGN
 #define OBJ_ALIGN (sizeof (obj_t))
-- 
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