New implementation of BLACKHOLEs

[ghc-hetmet.git] / rts / Capability.h

diff --git a/rts/Capability.h b/rts/Capability.h
index ff6e368..e12b8ce 100644 (file)
--- a/rts/Capability.h
+++ b/rts/Capability.h
@@ -43,9 +43,6 @@ struct Capability_ {
     // catching unsafe call-ins.
     rtsBool in_haskell;
 
-    // true if this Capability is currently in the GC
-    rtsBool in_gc;
-
     // The run queue.  The Task owning this Capability has exclusive
     // access to its run queue, so can wake up threads without
     // taking a lock, and the common path through the scheduler is
@@ -59,7 +56,7 @@ struct Capability_ {
     // the suspended TSOs easily.  Hence, when migrating a Task from
     // the returning_tasks list, we must also migrate its entry from
     // this list.
-    Task *suspended_ccalling_tasks;
+    InCall *suspended_ccalls;
 
     // One mutable list per generation, so we don't need to take any
     // locks when updating an old-generation thunk.  This also lets us
@@ -91,11 +88,8 @@ struct Capability_ {
     Task *returning_tasks_hd; // Singly-linked, with head/tail
     Task *returning_tasks_tl;
 
-    // A list of threads to append to this Capability's run queue at
-    // the earliest opportunity.  These are threads that have been
-    // woken up by another Capability.
-    StgTSO *wakeup_queue_hd;
-    StgTSO *wakeup_queue_tl;
+    // Messages, or END_TSO_QUEUE.
+    Message *inbox;
 
     SparkPool *sparks;
 
@@ -207,6 +201,8 @@ void waitForReturnCapability (Capability **cap/*in/out*/, Task *task);
 
 INLINE_HEADER void recordMutableCap (StgClosure *p, Capability *cap, nat gen);
 
+INLINE_HEADER void recordClosureMutated (Capability *cap, StgClosure *p);
+
 #if defined(THREADED_RTS)
 
 // Gives up the current capability IFF there is a higher-priority
@@ -228,12 +224,6 @@ void yieldCapability (Capability** pCap, Task *task);
 //
 void waitForCapability (Task *task, Mutex *mutex, Capability **pCap);
 
-// Wakes up a thread on a Capability (probably a different Capability
-// from the one held by the current Task).
-//
-void wakeupThreadOnCapability (Capability *my_cap, Capability *other_cap,
-                               StgTSO *tso);
-
 // Wakes up a worker thread on just one Capability, used when we
 // need to service some global event.
 //
@@ -288,6 +278,16 @@ void markCapabilities (evac_fn evac, void *user);
 void traverseSparkQueues (evac_fn evac, void *user);
 
 /* -----------------------------------------------------------------------------
+   Messages
+   -------------------------------------------------------------------------- */
+
+#ifdef THREADED_RTS
+
+INLINE_HEADER rtsBool emptyInbox(Capability *cap);;
+
+#endif // THREADED_RTS
+
+/* -----------------------------------------------------------------------------
  * INLINE functions... private below here
  * -------------------------------------------------------------------------- */
 
@@ -297,7 +297,8 @@ recordMutableCap (StgClosure *p, Capability *cap, nat gen)
     bdescr *bd;
 
     // We must own this Capability in order to modify its mutable list.
-    ASSERT(cap->running_task == myTask());
+    //    ASSERT(cap->running_task == myTask());
+    // NO: assertion is violated by performPendingThrowTos()
     bd = cap->mut_lists[gen];
     if (bd->free >= bd->start + BLOCK_SIZE_W) {
        bdescr *new_bd;
@@ -309,6 +310,15 @@ recordMutableCap (StgClosure *p, Capability *cap, nat gen)
     *bd->free++ = (StgWord)p;
 }
 
+INLINE_HEADER void
+recordClosureMutated (Capability *cap, StgClosure *p)
+{
+    bdescr *bd;
+    bd = Bdescr((StgPtr)p);
+    if (bd->gen_no != 0) recordMutableCap(p,cap,bd->gen_no);
+}
+
+
 #if defined(THREADED_RTS)
 INLINE_HEADER rtsBool
 emptySparkPoolCap (Capability *cap) 
@@ -335,6 +345,15 @@ contextSwitchCapability (Capability *cap)
     cap->context_switch = 1;
 }
 
+#ifdef THREADED_RTS
+
+INLINE_HEADER rtsBool emptyInbox(Capability *cap)
+{
+    return (cap->inbox == (Message*)END_TSO_QUEUE);
+}
+
+#endif
+
 END_RTS_PRIVATE
 
 #endif /* CAPABILITY_H */