Export blockUserSignals and unblockUserSignals (needed for #2870)

[ghc-hetmet.git] / rts / Schedule.c

diff --git a/rts/Schedule.c b/rts/Schedule.c
index d22d48f..6c46c09 100644 (file)
--- a/rts/Schedule.c
+++ b/rts/Schedule.c
@@ -32,6 +32,7 @@
 #include "Proftimer.h"
 #include "ProfHeap.h"
 #include "GC.h"
+#include "Weak.h"
 
 /* PARALLEL_HASKELL includes go here */
 
@@ -281,6 +282,12 @@ schedule (Capability *initialCapability, Task *task)
              "### NEW SCHEDULER LOOP (task: %p, cap: %p)",
              task, initialCapability);
 
+  if (running_finalizers) {
+      errorBelch("error: a C finalizer called back into Haskell.\n"
+                 "   use Foreign.Concurrent.newForeignPtr for Haskell finalizers.");
+      stg_exit(EXIT_FAILURE);
+  }
+
   schedulePreLoop();
 
   // -----------------------------------------------------------
@@ -737,6 +744,7 @@ scheduleYield (Capability **pcap, Task *task)
     // if we have work, and we don't need to give up the Capability, continue.
     if (!shouldYieldCapability(cap,task) && 
         (!emptyRunQueue(cap) ||
+         !emptyWakeupQueue(cap) ||
          blackholes_need_checking ||
          sched_state >= SCHED_INTERRUPTING))
         return;