X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=includes%2FTSO.h;h=be50c124fc7ed3e46fcf6a7af530106cca6a4259;hb=cbbee4e8727c583daf32d9bf17f00afaa839ef10;hp=088097ea507588a705b53f34606a26e03f69763f;hpb=911b42b27ad5f039465d14052460e2d9dde053ab;p=ghc-hetmet.git

diff --git a/includes/TSO.h b/includes/TSO.h
index 088097e..be50c12 100644
--- a/includes/TSO.h
+++ b/includes/TSO.h
@@ -33,16 +33,6 @@ typedef struct {
 } StgTSOStatBuf;
 
 /*
- * GRAN: We distinguish between the various classes of threads in 
- * the system.
- */
-typedef enum {
-  AdvisoryPriority,
-  MandatoryPriority,
-  RevalPriority
-} StgThreadPriority;
-
-/*
  * PROFILING info in a TSO
  */
 typedef struct {
@@ -50,25 +40,6 @@ typedef struct {
 } StgTSOProfInfo;
 
 /*
- * PAR info in a TSO
- */
-typedef StgTSOStatBuf StgTSOParInfo;
-
-/*
- * DIST info in a TSO
- */
-typedef struct {
-  StgThreadPriority  priority;   
-  StgInt             revalTid;   /* ToDo: merge both into 1 word */
-  StgInt             revalSlot;
-} StgTSODistInfo;
-
-/*
- * GRAN info in a TSO
- */
-typedef StgTSOStatBuf StgTSOGranInfo;
-
-/*
  * There is no TICKY info in a TSO at this time.
  */
 
@@ -124,7 +95,21 @@ typedef union {
 typedef struct StgTSO_ {
     StgHeader               header;
 
-    struct StgTSO_*         link;       /* Links threads onto blocking queues */
+    /* The link field, for linking threads together in lists (e.g. the
+       run queue on a Capability.
+    */
+    struct StgTSO_*         _link;
+    /*
+       NOTE!!!  do not modify _link directly, it is subject to
+       a write barrier for generational GC.  Instead use the
+       setTSOLink() function.  Exceptions to this rule are:
+
+       * setting the link field to END_TSO_QUEUE
+       * putting a TSO on the blackhole_queue
+       * setting the link field of the currently running TSO, as it
+         will already be dirty.
+    */
+
     struct StgTSO_*         global_link;    /* Links all threads together */
     
     StgWord16               what_next;      /* Values defined in Constants.h */
@@ -150,15 +135,6 @@ typedef struct StgTSO_ {
 #ifdef PROFILING
     StgTSOProfInfo prof;
 #endif
-#ifdef PAR
-    StgTSOParInfo par;
-#endif
-#ifdef GRAN
-    StgTSOGranInfo gran;
-#endif
-#ifdef DIST
-    StgTSODistInfo dist;
-#endif
 #ifdef mingw32_HOST_OS
     StgWord32 saved_winerror;
 #endif
@@ -172,6 +148,13 @@ typedef struct StgTSO_ {
 } StgTSO;
 
 /* -----------------------------------------------------------------------------
+   functions
+   -------------------------------------------------------------------------- */
+
+extern void dirty_TSO  (Capability *cap, StgTSO *tso);
+extern void setTSOLink (Capability *cap, StgTSO *tso, StgTSO *target);
+
+/* -----------------------------------------------------------------------------
    Invariants:
 
    An active thread has the following properties:
@@ -239,16 +222,7 @@ extern StgTSO dummy_tso;
 
 #define TSO_STRUCT_SIZEW (TSO_STRUCT_SIZE / sizeof(W_))
 
-
 /* this is the NIL ptr for a TSO queue (e.g. runnable queue) */
 #define END_TSO_QUEUE  ((StgTSO *)(void*)&stg_END_TSO_QUEUE_closure)
 
-#if defined(PAR) || defined(GRAN)
-/* this is the NIL ptr for a blocking queue */
-# define END_BQ_QUEUE  ((StgBlockingQueueElement *)(void*)&stg_END_TSO_QUEUE_closure)
-/* this is the NIL ptr for a blocked fetch queue (as in PendingFetches in GUM) */
-# define END_BF_QUEUE  ((StgBlockedFetch *)(void*)&stg_END_TSO_QUEUE_closure)
-#endif
-/* ToDo?: different name for end of sleeping queue ? -- HWL */
-
 #endif /* TSO_H */