Use message-passing to implement throwTo in the RTS

[ghc-hetmet.git] / includes / rts / storage / Closures.h

diff --git a/includes/rts/storage/Closures.h b/includes/rts/storage/Closures.h
index 6e06e57..d7498e2 100644 (file)
--- a/includes/rts/storage/Closures.h
+++ b/includes/rts/storage/Closures.h
@@ -136,7 +136,9 @@ typedef struct {
 typedef struct {
     StgHeader   header;
     StgWord     ptrs;
+    StgWord     size; // ptrs plus card table
     StgClosure *payload[FLEXIBLE_ARRAY];
+    // see also: StgMutArrPtrs macros in ClosureMacros.h
 } StgMutArrPtrs;
 
 typedef struct {
@@ -388,10 +390,10 @@ typedef struct StgInvariantCheckQueue_ {
 
 struct StgTRecHeader_ {
   StgHeader                  header;
-  TRecState                  state;
   struct StgTRecHeader_     *enclosing_trec;
   StgTRecChunk              *current_chunk;
   StgInvariantCheckQueue    *invariants_to_check;
+  TRecState                  state;
 };
 
 typedef struct {
@@ -414,4 +416,27 @@ typedef struct {
   StgClosure    *alt_code;
 } StgCatchRetryFrame;
 
+/* ----------------------------------------------------------------------------
+   Messages
+   ------------------------------------------------------------------------- */
+
+typedef struct Message_ {
+    StgHeader        header;
+    struct Message_ *link;
+} Message;
+
+typedef struct MessageWakeup_ {
+    StgHeader header;
+    Message  *link;
+    StgTSO   *tso;
+} MessageWakeup;
+
+typedef struct MessageThrowTo_ {
+    StgHeader   header;
+    Message    *link;
+    StgTSO     *source;
+    StgTSO     *target;
+    StgClosure *exception;
+} MessageThrowTo;
+
 #endif /* RTS_STORAGE_CLOSURES_H */