[project @ 2000-05-19 09:49:00 by simonmar]

[ghc-hetmet.git] / ghc / rts / RtsAPI.c

diff --git a/ghc/rts/RtsAPI.c b/ghc/rts/RtsAPI.c
index 79c33a8..992be89 100644 (file)
--- a/ghc/rts/RtsAPI.c
+++ b/ghc/rts/RtsAPI.c
@@ -1,7 +1,7 @@
 /* ----------------------------------------------------------------------------
- * $Id: RtsAPI.c,v 1.9 1999/10/15 11:03:10 sewardj Exp $
+ * $Id: RtsAPI.c,v 1.17 2000/04/26 10:17:41 simonmar Exp $
  *
- * (c) The GHC Team, 1998-1999
+ * (c) The GHC Team, 1998-2000
  *
  * API for invoking Haskell functions via the RTS
  *
@@ -13,6 +13,7 @@
 #include "SchedAPI.h"
 #include "RtsFlags.h"
 #include "RtsUtils.h"
+#include "Prelude.h"
 
 /* ----------------------------------------------------------------------------
    Building Haskell objects from C datatypes.
@@ -21,7 +22,7 @@ HaskellObj
 rts_mkChar (char c)
 {
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
-  p->header.info = (const StgInfoTable*)&Czh_con_info;
+  p->header.info = Czh_con_info;
   p->payload[0]  = (StgClosure *)((StgInt)c);
   return p;
 }
@@ -30,7 +31,7 @@ HaskellObj
 rts_mkInt (int i)
 {
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
-  p->header.info = (const StgInfoTable*)&Izh_con_info;
+  p->header.info = Izh_con_info;
   p->payload[0]  = (StgClosure *)(StgInt)i;
   return p;
 }
@@ -43,7 +44,7 @@ rts_mkInt8 (int i)
      instead of the one for Int8, but the types have identical
      representation.
   */
-  p->header.info = (const StgInfoTable*)&Izh_con_info;
+  p->header.info = Izh_con_info;
   /* Make sure we mask out the bits above the lowest 8 */
   p->payload[0]  = (StgClosure *)(StgInt)((unsigned)i & 0xff);
   return p;
@@ -57,7 +58,7 @@ rts_mkInt16 (int i)
      instead of the one for Int8, but the types have identical
      representation.
   */
-  p->header.info = (const StgInfoTable*)&Izh_con_info;
+  p->header.info = Izh_con_info;
   /* Make sure we mask out the relevant bits */
   p->payload[0]  = (StgClosure *)(StgInt)((unsigned)i & 0xffff);
   return p;
@@ -68,7 +69,7 @@ rts_mkInt32 (int i)
 {
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
   /* see mk_Int8 comment */
-  p->header.info = (const StgInfoTable*)&Izh_con_info;
+  p->header.info = Izh_con_info;
   p->payload[0]  = (StgClosure *)(StgInt)i;
   return p;
 }
@@ -79,7 +80,7 @@ rts_mkInt64 (long long int i)
   long long *tmp;
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,2));
   /* see mk_Int8 comment */
-  p->header.info = (const StgInfoTable*)&I64zh_con_info;
+  p->header.info = I64zh_con_info;
   tmp  = (long long*)&(p->payload[0]);
   *tmp = (StgInt64)i;
   return p;
@@ -89,7 +90,7 @@ HaskellObj
 rts_mkWord (unsigned int i)
 {
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
-  p->header.info = (const StgInfoTable*)&Wzh_con_info;
+  p->header.info = Wzh_con_info;
   p->payload[0]  = (StgClosure *)(StgWord)i;
   return p;
 }
@@ -99,7 +100,7 @@ rts_mkWord8 (unsigned int w)
 {
   /* see rts_mkInt* comments */
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
-  p->header.info = (const StgInfoTable*)&Wzh_con_info;
+  p->header.info = Wzh_con_info;
   p->payload[0]  = (StgClosure *)(StgWord)(w & 0xff);
   return p;
 }
@@ -109,7 +110,7 @@ rts_mkWord16 (unsigned int w)
 {
   /* see rts_mkInt* comments */
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
-  p->header.info = (const StgInfoTable*)&Wzh_con_info;
+  p->header.info = Wzh_con_info;
   p->payload[0]  = (StgClosure *)(StgWord)(w & 0xffff);
   return p;
 }
@@ -119,7 +120,7 @@ rts_mkWord32 (unsigned int w)
 {
   /* see rts_mkInt* comments */
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
-  p->header.info = (const StgInfoTable*)&Wzh_con_info;
+  p->header.info = Wzh_con_info;
   p->payload[0]  = (StgClosure *)(StgWord)w;
   return p;
 }
@@ -131,7 +132,7 @@ rts_mkWord64 (unsigned long long w)
 
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,2));
   /* see mk_Int8 comment */
-  p->header.info = (const StgInfoTable*)&W64zh_con_info;
+  p->header.info = W64zh_con_info;
   tmp  = (unsigned long long*)&(p->payload[0]);
   *tmp = (StgWord64)w;
   return p;
@@ -141,7 +142,7 @@ HaskellObj
 rts_mkFloat (float f)
 {
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
-  p->header.info = (const StgInfoTable*)&Fzh_con_info;
+  p->header.info = Fzh_con_info;
   ASSIGN_FLT((P_)p->payload, (StgFloat)f);
   return p;
 }
@@ -150,7 +151,7 @@ HaskellObj
 rts_mkDouble (double d)
 {
   StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,sizeofW(StgDouble)));
-  p->header.info = (const StgInfoTable*)&Dzh_con_info;
+  p->header.info = Dzh_con_info;
   ASSIGN_DBL((P_)p->payload, (StgDouble)d);
   return p;
 }
@@ -159,7 +160,7 @@ HaskellObj
 rts_mkStablePtr (StgStablePtr s)
 {
   StgClosure *p = (StgClosure *)allocate(sizeofW(StgHeader)+1);
-  p->header.info = (const StgInfoTable*)&StablePtr_con_info;
+  p->header.info = StablePtr_con_info;
   p->payload[0]  = (StgClosure *)s;
   return p;
 }
@@ -168,26 +169,26 @@ HaskellObj
 rts_mkAddr (void *a)
 {
   StgClosure *p = (StgClosure *)allocate(sizeofW(StgHeader)+1);
-  p->header.info = (const StgInfoTable*)&Azh_con_info;
+  p->header.info = Azh_con_info;
   p->payload[0]  = (StgClosure *)a;
   return p;
 }
 
 #ifdef COMPILER /* GHC has em, Hugs doesn't */
 HaskellObj
-rts_mkBool (int b)
+rts_mkBool (StgBool b)
 {
   if (b) {
-    return (StgClosure *)&True_closure;
+    return (StgClosure *)True_closure;
   } else {
-    return (StgClosure *)&False_closure;
+    return (StgClosure *)False_closure;
   }
 }
 
 HaskellObj
 rts_mkString (char *s)
 {
-  return rts_apply((StgClosure *)&unpackCString_closure, rts_mkAddr(s));
+  return rts_apply((StgClosure *)unpackCString_closure, rts_mkAddr(s));
 }
 #endif /* COMPILER */
 
@@ -195,7 +196,7 @@ HaskellObj
 rts_apply (HaskellObj f, HaskellObj arg)
 {
   StgAP_UPD *ap = (StgAP_UPD *)allocate(AP_sizeW(1));
-  ap->header.info = &AP_UPD_info;
+  SET_HDR(ap, &AP_UPD_info, CCS_SYSTEM);
   ap->n_args = 1;
   ap->fun    = f;
   ap->payload[0] = (P_)arg;
@@ -209,8 +210,8 @@ rts_apply (HaskellObj f, HaskellObj arg)
 char
 rts_getChar (HaskellObj p)
 {
-  if ( p->header.info == (const StgInfoTable*)&Czh_con_info || 
-       p->header.info == (const StgInfoTable*)&Czh_static_info) {
+  if ( p->header.info == Czh_con_info || 
+       p->header.info == Czh_static_info) {
     return (char)(StgWord)(p->payload[0]);
   } else {
     barf("getChar: not a Char");
@@ -221,8 +222,8 @@ int
 rts_getInt (HaskellObj p)
 {
   if ( 1 ||
-       p->header.info == (const StgInfoTable*)&Izh_con_info || 
-       p->header.info == (const StgInfoTable*)&Izh_static_info ) {
+       p->header.info == Izh_con_info || 
+       p->header.info == Izh_static_info ) {
     return (int)(p->payload[0]);
   } else {
     barf("getInt: not an Int");
@@ -233,8 +234,8 @@ int
 rts_getInt32 (HaskellObj p)
 {
   if ( 1 ||
-       p->header.info == (const StgInfoTable*)&Izh_con_info || 
-       p->header.info == (const StgInfoTable*)&Izh_static_info ) {
+       p->header.info == Izh_con_info || 
+       p->header.info == Izh_static_info ) {
     return (int)(p->payload[0]);
   } else {
     barf("getInt: not an Int");
@@ -245,8 +246,8 @@ unsigned int
 rts_getWord (HaskellObj p)
 {
   if ( 1 || /* see above comment */
-       p->header.info == (const StgInfoTable*)&Wzh_con_info ||
-       p->header.info == (const StgInfoTable*)&Wzh_static_info ) {
+       p->header.info == Wzh_con_info ||
+       p->header.info == Wzh_static_info ) {
     return (unsigned int)(p->payload[0]);
   } else {
     barf("getWord: not a Word");
@@ -257,8 +258,8 @@ unsigned int
 rts_getWord32 (HaskellObj p)
 {
   if ( 1 || /* see above comment */
-       p->header.info == (const StgInfoTable*)&Wzh_con_info ||
-       p->header.info == (const StgInfoTable*)&Wzh_static_info ) {
+       p->header.info == Wzh_con_info ||
+       p->header.info == Wzh_static_info ) {
     return (unsigned int)(p->payload[0]);
   } else {
     barf("getWord: not a Word");
@@ -268,8 +269,8 @@ rts_getWord32 (HaskellObj p)
 float
 rts_getFloat (HaskellObj p)
 {
-  if ( p->header.info == (const StgInfoTable*)&Fzh_con_info || 
-       p->header.info == (const StgInfoTable*)&Fzh_static_info ) {
+  if ( p->header.info == Fzh_con_info || 
+       p->header.info == Fzh_static_info ) {
     return (float)(PK_FLT((P_)p->payload));
   } else {
     barf("getFloat: not a Float");
@@ -279,8 +280,8 @@ rts_getFloat (HaskellObj p)
 double
 rts_getDouble (HaskellObj p)
 {
-  if ( p->header.info == (const StgInfoTable*)&Dzh_con_info || 
-       p->header.info == (const StgInfoTable*)&Dzh_static_info ) {
+  if ( p->header.info == Dzh_con_info || 
+       p->header.info == Dzh_static_info ) {
     return (double)(PK_DBL((P_)p->payload));
   } else {
     barf("getDouble: not a Double");
@@ -290,8 +291,8 @@ rts_getDouble (HaskellObj p)
 StgStablePtr
 rts_getStablePtr (HaskellObj p)
 {
-  if ( p->header.info == (const StgInfoTable*)&StablePtr_con_info || 
-       p->header.info == (const StgInfoTable*)&StablePtr_static_info ) {
+  if ( p->header.info == StablePtr_con_info || 
+       p->header.info == StablePtr_static_info ) {
     return (StgStablePtr)(p->payload[0]);
   } else {
     barf("getStablePtr: not a StablePtr");
@@ -301,8 +302,8 @@ rts_getStablePtr (HaskellObj p)
 void *
 rts_getAddr (HaskellObj p)
 {
-  if ( p->header.info == (const StgInfoTable*)&Azh_con_info || 
-       p->header.info == (const StgInfoTable*)&Azh_static_info ) {
+  if ( p->header.info == Azh_con_info || 
+       p->header.info == Azh_static_info ) {
   
     return (void *)(p->payload[0]);
   } else {
@@ -314,9 +315,9 @@ rts_getAddr (HaskellObj p)
 int
 rts_getBool (HaskellObj p)
 {
-  if (p == &True_closure) {
+  if (p == True_closure) {
     return 1;
-  } else if (p == &False_closure) {
+  } else if (p == False_closure) {
     return 0;
   } else {
     barf("getBool: not a Bool");
@@ -331,14 +332,16 @@ SchedulerStatus
 rts_eval (HaskellObj p, /*out*/HaskellObj *ret)
 {
   StgTSO *tso = createGenThread(RtsFlags.GcFlags.initialStkSize, p);
-  return schedule(tso, ret);
+  scheduleThread(tso);
+  return waitThread(tso, ret);
 }
 
 SchedulerStatus
 rts_eval_ (HaskellObj p, unsigned int stack_size, /*out*/HaskellObj *ret)
 {
   StgTSO *tso = createGenThread(stack_size, p);
-  return schedule(tso, ret);
+  scheduleThread(tso);
+  return waitThread(tso, ret);
 }
 
 /*
@@ -349,7 +352,8 @@ SchedulerStatus
 rts_evalIO (HaskellObj p, /*out*/HaskellObj *ret)
 {
   StgTSO* tso = createStrictIOThread(RtsFlags.GcFlags.initialStkSize, p);
-  return schedule(tso, ret);
+  scheduleThread(tso);
+  return waitThread(tso, ret);
 }
 
 /*
@@ -359,16 +363,40 @@ SchedulerStatus
 rts_evalLazyIO (HaskellObj p, unsigned int stack_size, /*out*/HaskellObj *ret)
 {
   StgTSO *tso = createIOThread(stack_size, p);
-  return schedule(tso, ret);
+  scheduleThread(tso);
+  return waitThread(tso, ret);
 }
 
-/* Convenience function for decoding the returned status. */
+#if defined(PAR) || defined(SMP)
+/*
+  Needed in the parallel world for non-Main PEs, which do not get a piece
+  of work to start with --- they have to humbly ask for it
+*/
 
-void rts_checkSchedStatus ( char* site, SchedulerStatus rc )
+SchedulerStatus
+rts_evalNothing(unsigned int stack_size)
 {
-  if ( rc == Success ) {
-     return;
-  } else {
-     barf("%s: Return code (%d) not ok",(site),(rc));
-  }
+  /* ToDo: propagate real SchedulerStatus back to caller */
+  scheduleThread(END_TSO_QUEUE);
+  return Success;
+}
+#endif
+
+/* Convenience function for decoding the returned status. */
+
+void
+rts_checkSchedStatus ( char* site, SchedulerStatus rc )
+{
+    switch (rc) {
+    case Success:
+       return;
+    case Killed:
+       barf("%s: uncaught exception",site);
+    case Interrupted:
+       barf("%s: interrupted", site);
+    case Deadlock:
+       barf("%s: no threads to run:  infinite loop or deadlock?", site);
+    default:
+       barf("%s: Return code (%d) not ok",(site),(rc));        
+    }
 }