/* ----------------------------------------------------------------------------
- * $Id: RtsAPI.c,v 1.5 1999/03/03 19:20:15 sof 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
*
#include "Rts.h"
#include "Storage.h"
#include "RtsAPI.h"
+#include "SchedAPI.h"
#include "RtsFlags.h"
#include "RtsUtils.h"
-
-#define CHASE_OUT_INDIRECTIONS(p) \
- while ((p)->header.info == &IND_info) { p=((StgInd*)p)->indirectee; }
+#include "Prelude.h"
/* ----------------------------------------------------------------------------
Building Haskell objects from C datatypes.
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;
}
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;
}
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;
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;
{
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;
}
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;
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;
}
{
/* 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;
}
{
/* 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;
}
{
/* 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;
}
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;
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;
}
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;
}
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;
}
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 */
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;
return (StgClosure *)ap;
}
-#endif /* COMPILER */
/* ----------------------------------------------------------------------------
Deconstructing Haskell objects
char
rts_getChar (HaskellObj p)
{
- CHASE_OUT_INDIRECTIONS(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");
int
rts_getInt (HaskellObj p)
{
- CHASE_OUT_INDIRECTIONS(p);
+ if ( 1 ||
+ p->header.info == Izh_con_info ||
+ p->header.info == Izh_static_info ) {
+ return (int)(p->payload[0]);
+ } else {
+ barf("getInt: not an Int");
+ }
+}
- if ( 1 || /* ToDo: accommodate I32's here as well */
- p->header.info == (const StgInfoTable*)&Izh_con_info ||
- p->header.info == (const StgInfoTable*)&Izh_static_info ) {
+int
+rts_getInt32 (HaskellObj p)
+{
+ if ( 1 ||
+ p->header.info == Izh_con_info ||
+ p->header.info == Izh_static_info ) {
return (int)(p->payload[0]);
} else {
barf("getInt: not an Int");
unsigned int
rts_getWord (HaskellObj p)
{
- CHASE_OUT_INDIRECTIONS(p);
+ if ( 1 || /* see above comment */
+ p->header.info == Wzh_con_info ||
+ p->header.info == Wzh_static_info ) {
+ return (unsigned int)(p->payload[0]);
+ } else {
+ barf("getWord: not a Word");
+ }
+}
+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");
float
rts_getFloat (HaskellObj p)
{
- CHASE_OUT_INDIRECTIONS(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");
double
rts_getDouble (HaskellObj p)
{
- CHASE_OUT_INDIRECTIONS(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");
StgStablePtr
rts_getStablePtr (HaskellObj p)
{
- CHASE_OUT_INDIRECTIONS(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");
void *
rts_getAddr (HaskellObj p)
{
- CHASE_OUT_INDIRECTIONS(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 {
int
rts_getBool (HaskellObj p)
{
- CHASE_OUT_INDIRECTIONS(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");
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);
}
+/*
+ * rts_evalIO() evaluates a value of the form (IO a), forcing the action's
+ * result to WHNF before returning.
+ */
SchedulerStatus
rts_evalIO (HaskellObj p, /*out*/HaskellObj *ret)
{
- StgTSO *tso = createIOThread(RtsFlags.GcFlags.initialStkSize, p);
- return schedule(tso, ret);
+ StgTSO* tso = createStrictIOThread(RtsFlags.GcFlags.initialStkSize, p);
+ scheduleThread(tso);
+ return waitThread(tso, ret);
}
+/*
+ * Like rts_evalIO(), but doesn't force the action's result.
+ */
SchedulerStatus
-rts_evalIO_ (HaskellObj p, unsigned int stack_size, /*out*/HaskellObj *ret)
+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);
}
+#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
+*/
+
+SchedulerStatus
+rts_evalNothing(unsigned int stack_size)
+{
+ /* 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 )
+void
+rts_checkSchedStatus ( char* site, SchedulerStatus rc )
{
- if ( rc == Success ) {
- return;
- } else {
- barf("%s: Return code (%d) not ok",(site),(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));
+ }
}
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