First cut at hash tables. One known problem is allocation during gc,

due to use of boxed numbers for vector access.

1 files changed, 16 insertions, 0 deletions

diff --git a/gc.c b/gc.c
index 4247c813..efc135e0 100644
--- a/gc.c
+++ b/gc.c
@@ -32,6 +32,7 @@
 #include <dirent.h>
 #include "lib.h"
 #include "stream.h"
+#include "hash.h"
 #include "txr.h"
 #include "gc.h"
 
@@ -350,8 +351,11 @@ void gc(void)
   if (gc_enabled) {
     jmp_buf jmp;
     setjmp(jmp);
+    gc_enabled = 0;
     mark();
+    hash_process_weak();
     sweep();
+    gc_enabled = 1;
   }
 }
 
@@ -372,6 +376,18 @@ void gc_mark(obj_t *obj)
   mark_obj(obj);
 }
 
+int gc_is_reachable(obj_t *obj)
+{
+  type_t t;
+
+  if (obj == nil)
+    return 1;
+
+  t = obj->t.type;
+
+  return (t & REACHABLE) != 0;
+}
+
 /*
  * Useful functions for gdb'ing.
  */