[project @ 2005-10-21 14:02:17 by simonmar]

[ghc-hetmet.git] / ghc / rts / StgMiscClosures.cmm

diff --git a/ghc/rts/StgMiscClosures.cmm b/ghc/rts/StgMiscClosures.cmm
index 30088e0..628e0f1 100644 (file)
--- a/ghc/rts/StgMiscClosures.cmm
+++ b/ghc/rts/StgMiscClosures.cmm
@@ -338,11 +338,16 @@ INFO_TABLE(stg_BLACKHOLE,0,1,BLACKHOLE,"BLACKHOLE","BLACKHOLE")
 
     TICK_ENT_BH();
 
+#ifdef SMP
+    // foreign "C" debugBelch("BLACKHOLE entry\n");
+#endif
+
     /* Actually this is not necessary because R1 is about to be destroyed. */
     LDV_ENTER(R1);
 
 #if defined(SMP)
     foreign "C" ACQUIRE_LOCK(sched_mutex "ptr");
+    // released in stg_block_blackhole_finally
 #endif
 
     /* Put ourselves on the blackhole queue */
@@ -353,12 +358,7 @@ INFO_TABLE(stg_BLACKHOLE,0,1,BLACKHOLE,"BLACKHOLE","BLACKHOLE")
     StgTSO_why_blocked(CurrentTSO) = BlockedOnBlackHole::I16;
     StgTSO_block_info(CurrentTSO) = R1;
 
-#if defined(SMP)
-    foreign "C" RELEASE_LOCK(sched_mutex "ptr");
-#endif
-
-    /* stg_gen_block is too heavyweight, use a specialised one */
-    jump stg_block_1;
+    jump stg_block_blackhole;
 }
 
 #if defined(PAR) || defined(GRAN)
@@ -407,7 +407,12 @@ INFO_TABLE(stg_CAF_BLACKHOLE,0,1,CAF_BLACKHOLE,"CAF_BLACKHOLE","CAF_BLACKHOLE")
     LDV_ENTER(R1);
 
 #if defined(SMP)
+    // foreign "C" debugBelch("BLACKHOLE entry\n");
+#endif
+
+#if defined(SMP)
     foreign "C" ACQUIRE_LOCK(sched_mutex "ptr");
+    // released in stg_block_blackhole_finally
 #endif
 
     /* Put ourselves on the blackhole queue */
@@ -418,12 +423,7 @@ INFO_TABLE(stg_CAF_BLACKHOLE,0,1,CAF_BLACKHOLE,"CAF_BLACKHOLE","CAF_BLACKHOLE")
     StgTSO_why_blocked(CurrentTSO) = BlockedOnBlackHole::I16;
     StgTSO_block_info(CurrentTSO) = R1;
 
-#if defined(SMP)
-    foreign "C" RELEASE_LOCK(sched_mutex "ptr");
-#endif
-
-    /* stg_gen_block is too heavyweight, use a specialised one */
-    jump stg_block_1;
+    jump stg_block_blackhole;
 }
 
 #ifdef EAGER_BLACKHOLING