Improve error reporting for kind errors (fix Trac #1633)

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

diff --git a/rts/Schedule.h b/rts/Schedule.h
index a4a95f3..97ee78e 100644 (file)
--- a/rts/Schedule.h
+++ b/rts/Schedule.h
@@ -12,6 +12,7 @@
 
 #include "OSThreads.h"
 #include "Capability.h"
+#include "EventLog.h"
 
 /* initScheduler(), exitScheduler()
  * Called from STG :  no
@@ -70,7 +71,9 @@ StgWord findRetryFrameHelper (StgTSO *tso);
  * Called from STG :  NO
  * Locks assumed   :  none
  */
-void workerStart(Task *task);
+#if defined(THREADED_RTS)
+void OSThreadProcAttr workerStart(Task *task);
+#endif
 
 #if defined(GRAN)
 void    awaken_blocked_queue(StgBlockingQueueElement *q, StgClosure *node);
@@ -87,11 +90,6 @@ void    awaken_blocked_queue(StgTSO *q);
 void    initThread(StgTSO *tso, nat stack_size);
 #endif
 
-/* Context switch flag.
- * Locks required  : none (conflicts are harmless)
- */
-extern int RTS_VAR(context_switch);
-
 /* The state of the scheduler.  This is used to control the sequence
  * of events during shutdown, and when the runtime is interrupted
  * using ^C.
@@ -100,7 +98,7 @@ extern int RTS_VAR(context_switch);
 #define SCHED_INTERRUPTING  1  /* ^C detected, before threads are deleted */
 #define SCHED_SHUTTING_DOWN 2  /* final shutdown */
 
-extern rtsBool RTS_VAR(sched_state);
+extern volatile StgWord RTS_VAR(sched_state);
 
 /* 
  * flag that tracks whether we have done any execution in this time slice.
@@ -116,7 +114,7 @@ extern rtsBool RTS_VAR(sched_state);
  * INACTIVE to DONE_GC happens under sched_mutex.  No lock required
  * to set it to ACTIVITY_YES.
  */
-extern nat recent_activity;
+extern volatile StgWord recent_activity;
 
 /* Thread queues.
  * Locks required  : sched_mutex
@@ -133,11 +131,6 @@ extern  StgTSO *RTS_VAR(sleeping_queue);
 #endif
 #endif
 
-/* Linked list of all threads.
- * Locks required  : sched_mutex
- */
-extern  StgTSO *RTS_VAR(all_threads);
-
 /* Set to rtsTrue if there are threads on the blackhole_queue, and
  * it is possible that one or more of them may be available to run.
  * This flag is set to rtsFalse after we've checked the queue, and
@@ -147,6 +140,8 @@ extern  StgTSO *RTS_VAR(all_threads);
  */
 extern rtsBool blackholes_need_checking;
 
+extern rtsBool heap_overflow;
+
 #if defined(THREADED_RTS)
 extern Mutex RTS_VAR(sched_mutex);
 #endif
@@ -159,6 +154,7 @@ void interruptStgRts (void);
 nat  run_queue_len (void);
 
 void resurrectThreads (StgTSO *);
+void performPendingThrowTos (StgTSO *);
 
 void printAllThreads(void);
 
@@ -186,23 +182,23 @@ void print_bqe (StgBlockingQueueElement *bqe);
 INLINE_HEADER void
 appendToRunQueue (Capability *cap, StgTSO *tso)
 {
-    ASSERT(tso->link == END_TSO_QUEUE);
+    ASSERT(tso->_link == END_TSO_QUEUE);
     if (cap->run_queue_hd == END_TSO_QUEUE) {
        cap->run_queue_hd = tso;
     } else {
-       cap->run_queue_tl->link = tso;
+       setTSOLink(cap, cap->run_queue_tl, tso);
     }
     cap->run_queue_tl = tso;
+    postEvent (cap, EVENT_THREAD_RUNNABLE, tso->id, 0);
 }
 
-/* Push a thread on the beginning of the run queue.  Used for
- * newly awakened threads, so they get run as soon as possible.
+/* Push a thread on the beginning of the run queue.
  * ASSUMES: cap->running_task is the current task.
  */
 INLINE_HEADER void
 pushOnRunQueue (Capability *cap, StgTSO *tso)
 {
-    tso->link = cap->run_queue_hd;
+    setTSOLink(cap, tso, cap->run_queue_hd);
     cap->run_queue_hd = tso;
     if (cap->run_queue_tl == END_TSO_QUEUE) {
        cap->run_queue_tl = tso;
@@ -216,8 +212,8 @@ popRunQueue (Capability *cap)
 { 
     StgTSO *t = cap->run_queue_hd;
     ASSERT(t != END_TSO_QUEUE);
-    cap->run_queue_hd = t->link;
-    t->link = END_TSO_QUEUE;
+    cap->run_queue_hd = t->_link;
+    t->_link = END_TSO_QUEUE; // no write barrier req'd
     if (cap->run_queue_hd == END_TSO_QUEUE) {
        cap->run_queue_tl = END_TSO_QUEUE;
     }
@@ -230,27 +226,32 @@ popRunQueue (Capability *cap)
 INLINE_HEADER void
 appendToBlockedQueue(StgTSO *tso)
 {
-    ASSERT(tso->link == END_TSO_QUEUE);
+    ASSERT(tso->_link == END_TSO_QUEUE);
     if (blocked_queue_hd == END_TSO_QUEUE) {
        blocked_queue_hd = tso;
     } else {
-       blocked_queue_tl->link = tso;
+       setTSOLink(&MainCapability, blocked_queue_tl, tso);
     }
     blocked_queue_tl = tso;
 }
 #endif
 
 #if defined(THREADED_RTS)
+// Assumes: my_cap is owned by the current Task.  We hold
+// other_cap->lock, but we do not necessarily own other_cap; another
+// Task may be running on it.
 INLINE_HEADER void
-appendToWakeupQueue (Capability *cap, StgTSO *tso)
+appendToWakeupQueue (Capability *my_cap, Capability *other_cap, StgTSO *tso)
 {
-    ASSERT(tso->link == END_TSO_QUEUE);
-    if (cap->wakeup_queue_hd == END_TSO_QUEUE) {
-       cap->wakeup_queue_hd = tso;
+    ASSERT(tso->_link == END_TSO_QUEUE);
+    if (other_cap->wakeup_queue_hd == END_TSO_QUEUE) {
+       other_cap->wakeup_queue_hd = tso;
     } else {
-       cap->wakeup_queue_tl->link = tso;
+        // my_cap is passed to setTSOLink() because it may need to
+        // write to the mutable list.
+       setTSOLink(my_cap, other_cap->wakeup_queue_tl, tso);
     }
-    cap->wakeup_queue_tl = tso;
+    other_cap->wakeup_queue_tl = tso;
 }
 #endif
 
@@ -293,11 +294,5 @@ emptyThreadQueues(Capability *cap)
 
 #endif /* !IN_STG_CODE */
 
-INLINE_HEADER void
-dirtyTSO (StgTSO *tso)
-{
-    tso->flags |= TSO_DIRTY;
-}
-
 #endif /* SCHEDULE_H */