/* ----------------------------------------------------------------------------
- * $Id: RtsAPI.c,v 1.31 2002/01/22 13:54:22 simonmar Exp $
+ * $Id: RtsAPI.c,v 1.50 2003/11/12 17:49:08 sof Exp $
*
* (c) The GHC Team, 1998-2001
*
#include "RtsFlags.h"
#include "RtsUtils.h"
#include "Prelude.h"
+#include "OSThreads.h"
+#include "Schedule.h"
+#include "Capability.h"
+
+#include <stdlib.h>
+
+static Capability *rtsApiCapability = NULL;
/* ----------------------------------------------------------------------------
Building Haskell objects from C datatypes.
{
StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,1));
SET_HDR(p, Czh_con_info, CCS_SYSTEM);
- p->payload[0] = (StgClosure *)(StgChar)c;
+ p->payload[0] = (StgClosure *)(StgWord)(StgChar)c;
return p;
}
HaskellObj
rts_mkInt64 (HsInt64 i)
{
- long long *tmp;
+ llong *tmp;
StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,2));
SET_HDR(p, I64zh_con_info, CCS_SYSTEM);
- tmp = (long long*)&(p->payload[0]);
+ tmp = (llong*)&(p->payload[0]);
*tmp = (StgInt64)i;
return p;
}
HaskellObj
rts_mkWord64 (HsWord64 w)
{
- unsigned long long *tmp;
+ ullong *tmp;
StgClosure *p = (StgClosure *)allocate(CONSTR_sizeW(0,2));
/* see mk_Int8 comment */
SET_HDR(p, W64zh_con_info, CCS_SYSTEM);
- tmp = (unsigned long long*)&(p->payload[0]);
+ tmp = (ullong*)&(p->payload[0]);
*tmp = (StgWord64)w;
return p;
}
return p;
}
-#ifdef COMPILER /* GHC has em, Hugs doesn't */
+HaskellObj
+rts_mkFunPtr (HsFunPtr a)
+{
+ StgClosure *p = (StgClosure *)allocate(sizeofW(StgHeader)+1);
+ SET_HDR(p, FunPtr_con_info, CCS_SYSTEM);
+ p->payload[0] = (StgClosure *)a;
+ return p;
+}
+
HaskellObj
rts_mkBool (HsBool b)
{
{
return rts_apply((StgClosure *)unpackCString_closure, rts_mkPtr(s));
}
-#endif /* COMPILER */
HaskellObj
rts_apply (HaskellObj f, HaskellObj arg)
{
- StgAP_UPD *ap = (StgAP_UPD *)allocate(AP_sizeW(1));
- SET_HDR(ap, &stg_AP_UPD_info, CCS_SYSTEM);
- ap->n_args = 1;
- ap->fun = f;
- ap->payload[0] = arg;
- return (StgClosure *)ap;
+ StgClosure *ap;
+
+ ap = (StgClosure *)allocate(sizeofW(StgClosure) + 2);
+ SET_HDR(ap, (StgInfoTable *)&stg_ap_2_upd_info, CCS_SYSTEM);
+ ap->payload[0] = f;
+ ap->payload[1] = arg;
+ return (StgClosure *)ap;
}
/* ----------------------------------------------------------------------------
Deconstructing Haskell objects
+
+ We would like to assert that we have the right kind of object in
+ each case, but this is problematic because in GHCi the info table
+ for the D# constructor (say) might be dynamically loaded. Hence we
+ omit these assertions for now.
------------------------------------------------------------------------- */
HsChar
rts_getChar (HaskellObj p)
{
- if ( p->header.info == Czh_con_info ||
- p->header.info == Czh_static_info) {
+ // See comment above:
+ // ASSERT(p->header.info == Czh_con_info ||
+ // p->header.info == Czh_static_info);
return (StgChar)(StgWord)(p->payload[0]);
- } else {
- barf("rts_getChar: not a Char");
- }
}
HsInt
rts_getInt (HaskellObj p)
{
- if ( 1 ||
- p->header.info == Izh_con_info ||
- p->header.info == Izh_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == Izh_con_info ||
+ // p->header.info == Izh_static_info);
return (HsInt)(p->payload[0]);
- } else {
- barf("rts_getInt: not an Int");
- }
}
HsInt8
rts_getInt8 (HaskellObj p)
{
- if ( 1 ||
- p->header.info == I8zh_con_info ||
- p->header.info == I8zh_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == I8zh_con_info ||
+ // p->header.info == I8zh_static_info);
return (HsInt8)(HsInt)(p->payload[0]);
- } else {
- barf("rts_getInt8: not an Int8");
- }
}
HsInt16
rts_getInt16 (HaskellObj p)
{
- if ( 1 ||
- p->header.info == I16zh_con_info ||
- p->header.info == I16zh_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == I16zh_con_info ||
+ // p->header.info == I16zh_static_info);
return (HsInt16)(HsInt)(p->payload[0]);
- } else {
- barf("rts_getInt16: not an Int16");
- }
}
HsInt32
rts_getInt32 (HaskellObj p)
{
- if ( 1 ||
- p->header.info == I32zh_con_info ||
- p->header.info == I32zh_static_info ) {
- return (HsInt32)(p->payload[0]);
- } else {
- barf("rts_getInt32: not an Int32");
- }
+ // See comment above:
+ // ASSERT(p->header.info == I32zh_con_info ||
+ // p->header.info == I32zh_static_info);
+ return (HsInt32)(HsInt)(p->payload[0]);
}
HsInt64
rts_getInt64 (HaskellObj p)
{
- HsInt64* tmp;
- if ( 1 ||
- p->header.info == I64zh_con_info ||
- p->header.info == I64zh_static_info ) {
+ HsInt64* tmp;
+ // See comment above:
+ // ASSERT(p->header.info == I64zh_con_info ||
+ // p->header.info == I64zh_static_info);
tmp = (HsInt64*)&(p->payload[0]);
return *tmp;
- } else {
- barf("rts_getInt64: not an Int64");
- }
}
HsWord
rts_getWord (HaskellObj p)
{
- if ( 1 || /* see above comment */
- p->header.info == Wzh_con_info ||
- p->header.info == Wzh_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == Wzh_con_info ||
+ // p->header.info == Wzh_static_info);
return (HsWord)(p->payload[0]);
- } else {
- barf("rts_getWord: not a Word");
- }
}
HsWord8
rts_getWord8 (HaskellObj p)
{
- if ( 1 || /* see above comment */
- p->header.info == W8zh_con_info ||
- p->header.info == W8zh_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == W8zh_con_info ||
+ // p->header.info == W8zh_static_info);
return (HsWord8)(HsWord)(p->payload[0]);
- } else {
- barf("rts_getWord8: not a Word8");
- }
}
HsWord16
rts_getWord16 (HaskellObj p)
{
- if ( 1 || /* see above comment */
- p->header.info == W16zh_con_info ||
- p->header.info == W16zh_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == W16zh_con_info ||
+ // p->header.info == W16zh_static_info);
return (HsWord16)(HsWord)(p->payload[0]);
- } else {
- barf("rts_getWord16: not a Word16");
- }
}
HsWord32
rts_getWord32 (HaskellObj p)
{
- if ( 1 || /* see above comment */
- p->header.info == W32zh_con_info ||
- p->header.info == W32zh_static_info ) {
- return (unsigned int)(p->payload[0]);
- } else {
- barf("rts_getWord: not a Word");
- }
+ // See comment above:
+ // ASSERT(p->header.info == W32zh_con_info ||
+ // p->header.info == W32zh_static_info);
+ return (HsWord32)(HsWord)(p->payload[0]);
}
HsWord64
rts_getWord64 (HaskellObj p)
{
- HsWord64* tmp;
- if ( 1 || /* see above comment */
- p->header.info == W64zh_con_info ||
- p->header.info == W64zh_static_info ) {
+ HsWord64* tmp;
+ // See comment above:
+ // ASSERT(p->header.info == W64zh_con_info ||
+ // p->header.info == W64zh_static_info);
tmp = (HsWord64*)&(p->payload[0]);
return *tmp;
- } else {
- barf("rts_getWord64: not a Word64");
- }
}
HsFloat
rts_getFloat (HaskellObj p)
{
- if ( p->header.info == Fzh_con_info ||
- p->header.info == Fzh_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == Fzh_con_info ||
+ // p->header.info == Fzh_static_info);
return (float)(PK_FLT((P_)p->payload));
- } else {
- barf("rts_getFloat: not a Float");
- }
}
HsDouble
rts_getDouble (HaskellObj p)
{
- if ( p->header.info == Dzh_con_info ||
- p->header.info == Dzh_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == Dzh_con_info ||
+ // p->header.info == Dzh_static_info);
return (double)(PK_DBL((P_)p->payload));
- } else {
- barf("rts_getDouble: not a Double");
- }
}
HsStablePtr
rts_getStablePtr (HaskellObj p)
{
- if ( p->header.info == StablePtr_con_info ||
- p->header.info == StablePtr_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == StablePtr_con_info ||
+ // p->header.info == StablePtr_static_info);
return (StgStablePtr)(p->payload[0]);
- } else {
- barf("rts_getStablePtr: not a StablePtr");
- }
}
HsPtr
rts_getPtr (HaskellObj p)
{
- if ( p->header.info == Ptr_con_info ||
- p->header.info == Ptr_static_info ) {
+ // See comment above:
+ // ASSERT(p->header.info == Ptr_con_info ||
+ // p->header.info == Ptr_static_info);
+ return (void *)(p->payload[0]);
+}
+
+HsFunPtr
+rts_getFunPtr (HaskellObj p)
+{
+ // See comment above:
+ // ASSERT(p->header.info == FunPtr_con_info ||
+ // p->header.info == FunPtr_static_info);
return (void *)(p->payload[0]);
- } else {
- barf("rts_getPtr: not an Ptr");
- }
}
-#ifdef COMPILER /* GHC has em, Hugs doesn't */
HsBool
rts_getBool (HaskellObj p)
{
- if (p == True_closure) {
- return 1;
- } else if (p == False_closure) {
- return 0;
- } else {
- barf("rts_getBool: not a Bool");
- }
+ StgInfoTable *info;
+
+ info = get_itbl((StgClosure *)p);
+ if (info->srt_bitmap == 0) { // srt_bitmap is the constructor tag
+ return 0;
+ } else {
+ return 1;
+ }
}
-#endif /* COMPILER */
/* ----------------------------------------------------------------------------
Evaluating Haskell expressions
rts_eval (HaskellObj p, /*out*/HaskellObj *ret)
{
StgTSO *tso;
+ Capability *cap = rtsApiCapability;
+ rtsApiCapability = NULL;
tso = createGenThread(RtsFlags.GcFlags.initialStkSize, p);
- scheduleThread(tso);
- return waitThread(tso, ret);
+ return scheduleWaitThread(tso,ret,cap);
}
SchedulerStatus
rts_eval_ (HaskellObj p, unsigned int stack_size, /*out*/HaskellObj *ret)
{
StgTSO *tso;
+ Capability *cap = rtsApiCapability;
+ rtsApiCapability = NULL;
tso = createGenThread(stack_size, p);
- scheduleThread(tso);
- return waitThread(tso, ret);
+ return scheduleWaitThread(tso,ret,cap);
}
/*
rts_evalIO (HaskellObj p, /*out*/HaskellObj *ret)
{
StgTSO* tso;
+ Capability *cap = rtsApiCapability;
+ rtsApiCapability = NULL;
tso = createStrictIOThread(RtsFlags.GcFlags.initialStkSize, p);
- scheduleThread(tso);
- return waitThread(tso, ret);
+ return scheduleWaitThread(tso,ret,cap);
}
/*
p = (StgClosure *)deRefStablePtr(s);
tso = createStrictIOThread(RtsFlags.GcFlags.initialStkSize, p);
- scheduleThread(tso);
- stat = waitThread(tso, &r);
+ stat = scheduleWaitThread(tso,&r,rtsApiCapability);
+ rtsApiCapability = NULL;
- if (stat == Success) {
+ if (stat == Success && ret != NULL) {
ASSERT(r != NULL);
*ret = getStablePtr((StgPtr)r);
}
* Like rts_evalIO(), but doesn't force the action's result.
*/
SchedulerStatus
-rts_evalLazyIO (HaskellObj p, unsigned int stack_size, /*out*/HaskellObj *ret)
+rts_evalLazyIO (HaskellObj p, /*out*/HaskellObj *ret)
+{
+ StgTSO *tso;
+ Capability *cap = rtsApiCapability;
+ rtsApiCapability = NULL;
+
+ tso = createIOThread(RtsFlags.GcFlags.initialStkSize, p);
+ return scheduleWaitThread(tso,ret,cap);
+}
+
+SchedulerStatus
+rts_evalLazyIO_ (HaskellObj p, unsigned int stack_size, /*out*/HaskellObj *ret)
{
StgTSO *tso;
+ Capability *cap = rtsApiCapability;
+ rtsApiCapability = NULL;
tso = createIOThread(stack_size, p);
- scheduleThread(tso);
- return waitThread(tso, ret);
+ return scheduleWaitThread(tso,ret,cap);
}
/* Convenience function for decoding the returned status. */
case Success:
return;
case Killed:
- barf("%s: uncaught exception",site);
+ prog_belch("%s: uncaught exception",site);
+ stg_exit(EXIT_FAILURE);
case Interrupted:
- barf("%s: interrupted", site);
+ prog_belch("%s: interrupted", site);
+ stg_exit(EXIT_FAILURE);
default:
- barf("%s: Return code (%d) not ok",(site),(rc));
+ prog_belch("%s: Return code (%d) not ok",(site),(rc));
+ stg_exit(EXIT_FAILURE);
}
}
+
+void
+rts_lock()
+{
+#ifdef RTS_SUPPORTS_THREADS
+ ACQUIRE_LOCK(&sched_mutex);
+
+ // we request to get the capability immediately, in order to
+ // a) stop other threads from using allocate()
+ // b) wake the current worker thread from awaitEvent()
+ // (so that a thread started by rts_eval* will start immediately)
+ grabReturnCapability(&sched_mutex,&rtsApiCapability);
+#endif
+}
+
+void
+rts_unlock()
+{
+#ifdef RTS_SUPPORTS_THREADS
+ if(rtsApiCapability)
+ releaseCapability(rtsApiCapability);
+ rtsApiCapability = NULL;
+ RELEASE_LOCK(&sched_mutex);
+#endif
+}
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