From 5c87f61e6b1567400d2bd8f452939bb948f16dda Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Thu, 25 Mar 2010 16:37:23 -0300
Subject: major collections in generational mode

---
 lgc.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

(limited to 'lgc.c')

diff --git a/lgc.c b/lgc.c
index 9c5cdb4f..b8ab674f 100644
--- a/lgc.c
+++ b/lgc.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.c,v 2.71 2010/03/24 15:51:10 roberto Exp roberto $
+** $Id: lgc.c,v 2.72 2010/03/25 13:06:36 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -835,11 +835,19 @@ static int prev = 0;
   global_State *g = G(L);
 int a = g->totalbytes;
   lua_assert(g->gcstate == GCSpropagate);
-  luaC_runtilstate(L, bitmask(GCSpause));
-  g->gcstate = GCSpropagate;  /* do not run 'markroot' */
+  if (g->lastmajormem == 0) {  /* signal for another major collection? */
+    luaC_fullgc(L, 0);  /* perform a full regular collection */
+    g->lastmajormem = g->totalbytes;  /* update control */
+  }
+  else {
+    luaC_runtilstate(L, bitmask(GCSpause));
+    g->gcstate = GCSpropagate;  /* do not run 'markroot' */
+    if (g->totalbytes > g->lastmajormem/100 * g->gcpause)
+      g->lastmajormem = 0;  /* signal for a major collection */
+  }
   g->GCthreshold = (g->totalbytes/100) * g->gcpause;
-/*printf("count: %d  old: %d  new: %d  dif: %d\n", c++, a, g->totalbytes,
-g->totalbytes - prev);*/
+/*printf("count: %d  old: %d  new: %d  dif: %d  lim: %d  threshold: %d\n",
+c++, a, g->totalbytes, g->totalbytes - prev, g->lastmajormem, g->GCthreshold);*/
 prev = g->totalbytes;
 }
 
@@ -890,7 +898,7 @@ void luaC_fullgc (lua_State *L, int isemergency) {
   if (!isemergency)   /* do not run finalizers during emergency GC */
     luaC_runtilstate(L, bitmask(GCSpause));
   if (origkind == KGC_GEN) {  /* generational mode? */
-    g->gckind = GCSpause;  /* collector must be always in... */
+    g->gcstate = GCSpause;  /* collector must be always in... */
     luaC_runtilstate(L, bitmask(GCSpropagate));  /* ...propagate phase */
   }
   g->GCthreshold = (g->totalbytes/100) * g->gcpause;
-- 
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