add another SMP assertion

[ghc-hetmet.git] / ghc / includes / TSO.h

diff --git a/ghc/includes/TSO.h b/ghc/includes/TSO.h
index ce1d29c..82ecacb 100644 (file)
--- a/ghc/includes/TSO.h
+++ b/ghc/includes/TSO.h
@@ -77,6 +77,22 @@ typedef StgTSOStatBuf StgTSOGranInfo;
  */
 typedef StgWord32 StgThreadID;
 
+/* 
+ * Flags for the tso->flags field.
+ *
+ * The TSO_DIRTY flag indicates that this TSO's stack should be
+ * scanned during garbage collection.  The link field of a TSO is
+ * always scanned, so we don't have to dirty a TSO just for linking
+ * it on a different list.
+ *
+ * TSO_DIRTY is set by 
+ *    - schedule(), just before running a thread,
+ *    - raiseAsync(), because it modifies a thread's stack
+ *    - resumeThread(), just before running the thread again
+ * and unset by the garbage collector (only).
+ */
+#define TSO_DIRTY   1
+
 /*
  * Type returned after running a thread.  Values of this type
  * include HeapOverflow, StackOverflow etc.  See Constants.h for the
@@ -85,7 +101,7 @@ typedef StgWord32 StgThreadID;
 typedef unsigned int StgThreadReturnCode;
 
 #if defined(mingw32_HOST_OS)
-/* results from an async I/O request + it's ID. */
+/* results from an async I/O request + its request ID. */
 typedef struct {
   unsigned int reqID;
   int          len;
@@ -98,7 +114,7 @@ typedef union {
   struct StgTSO_ *tso;
   StgInt fd;   /* StgInt instead of int, so that it's the same size as the ptrs */
 #if defined(mingw32_HOST_OS)
-  StgAsyncIOResult* async_result;
+  StgAsyncIOResult *async_result;
 #endif
   StgWord target;
 } StgTSOBlockInfo;
@@ -117,23 +133,20 @@ typedef union {
  * field.
  */
 
-/* 
- * ToDo: make this structure sensible on a non-32-bit arch.
- */
-
 typedef struct StgTSO_ {
   StgHeader          header;
 
   struct StgTSO_*    link;          /* Links threads onto blocking queues */
   struct StgTSO_*    global_link;    /* Links all threads together */
   
-  StgWord16           what_next;  /* Values defined in Constants.h */
-  StgWord16           why_blocked;  /* Values defined in Constants.h */
+  StgWord16          what_next;      /* Values defined in Constants.h */
+  StgWord16          why_blocked;    /* Values defined in Constants.h */
+  StgWord32          flags;
   StgTSOBlockInfo    block_info;
   struct StgTSO_*    blocked_exceptions;
   StgThreadID        id;
   int                saved_errno;
-  struct StgMainThread_* main;
+  struct Task_*      bound;          // non-NULL for a bound thread
   struct StgTRecHeader_ *trec;       /* STM transaction record */
   
 #ifdef TICKY_TICKY