/* -----------------------------------------------------------------------------
- * $Id: PrimOps.hc,v 1.70 2001/02/09 13:09:16 simonmar Exp $
+ * $Id: PrimOps.hc,v 1.78 2001/03/26 13:43:05 simonmar Exp $
*
* (c) The GHC Team, 1998-2000
*
*
* ---------------------------------------------------------------------------*/
+#include "Stg.h"
#include "Rts.h"
#include "RtsFlags.h"
-------------------------------------------------------------------------- */
-#ifndef PAR
FN_(mkForeignObjzh_fast)
{
/* R1.p = ptr to foreign object,
RET_P(result);
FE_
}
-#endif
/* These two are out-of-line for the benefit of the NCG */
FN_(unsafeThawArrayzh_fast)
Weak Pointer Primitives
-------------------------------------------------------------------------- */
-#ifndef PAR
-
FN_(mkWeakzh_fast)
{
/* R1.p = key
FE_
}
-#endif /* !PAR */
-
/* -----------------------------------------------------------------------------
Arbitrary-precision Integer operations.
-------------------------------------------------------------------------- */
if ( val < 0LL ) {
neg = 1;
val = -val;
- }
+ }
hi = (W_)((LW_)val / 0x100000000ULL);
if ( words_needed == 2 ) {
- s = 2;
+ s = 2;
Hp[-1] = (W_)val;
Hp[0] = hi;
} else if ( val != 0 ) {
val = mvar->value;
mvar->value = (StgClosure *)&stg_END_TSO_QUEUE_closure;
+ /* wake up the first thread on the queue
+ */
+ if (mvar->head != (StgTSO *)&stg_END_TSO_QUEUE_closure) {
+ ASSERT(mvar->head->why_blocked == BlockedOnMVar);
+#if defined(GRAN) || defined(PAR)
+ /* ToDo: check 2nd arg (mvar) is right */
+ mvar->head = RET_STGCALL2(StgTSO *,unblockOne,mvar->head,mvar);
+#else
+ mvar->head = RET_STGCALL1(StgTSO *,unblockOne,mvar->head);
+#endif
+ if (mvar->head == (StgTSO *)&stg_END_TSO_QUEUE_closure) {
+ mvar->tail = (StgTSO *)&stg_END_TSO_QUEUE_closure;
+ }
+ }
+
/* do this last... we might have locked the MVar in the SMP case,
* and writing the info pointer will unlock it.
*/
val = mvar->value;
mvar->value = (StgClosure *)&stg_END_TSO_QUEUE_closure;
+ /* wake up the first thread on the queue
+ */
+ if (mvar->head != (StgTSO *)&stg_END_TSO_QUEUE_closure) {
+ ASSERT(mvar->head->why_blocked == BlockedOnMVar);
+#if defined(GRAN) || defined(PAR)
+ /* ToDo: check 2nd arg (mvar) is right */
+ mvar->head = RET_STGCALL2(StgTSO *,unblockOne,mvar->head,mvar);
+#else
+ mvar->head = RET_STGCALL1(StgTSO *,unblockOne,mvar->head);
+#endif
+ if (mvar->head == (StgTSO *)&stg_END_TSO_QUEUE_closure) {
+ mvar->tail = (StgTSO *)&stg_END_TSO_QUEUE_closure;
+ }
+ }
+
/* do this last... we might have locked the MVar in the SMP case,
* and writing the info pointer will unlock it.
*/
#endif
if (info == &stg_FULL_MVAR_info) {
- R1.cl = (StgClosure *)PutFullMVar_closure;
- JMP_(raisezh_fast);
+ if (mvar->head == (StgTSO *)&stg_END_TSO_QUEUE_closure) {
+ mvar->head = CurrentTSO;
+ } else {
+ mvar->tail->link = CurrentTSO;
+ }
+ CurrentTSO->link = (StgTSO *)&stg_END_TSO_QUEUE_closure;
+ CurrentTSO->why_blocked = BlockedOnMVar;
+ CurrentTSO->block_info.closure = (StgClosure *)mvar;
+ mvar->tail = CurrentTSO;
+
+#ifdef SMP
+ /* unlock the MVar */
+ mvar->header.info = &stg_FULL_MVAR_info;
+#endif
+ BLOCK( R1_PTR | R2_PTR, putMVarzh_fast );
}
mvar->value = R2.cl;
*/
if (mvar->head != (StgTSO *)&stg_END_TSO_QUEUE_closure) {
ASSERT(mvar->head->why_blocked == BlockedOnMVar);
-#if defined(GRAN)
- mvar->head = RET_STGCALL2(StgTSO *,unblockOne,mvar->head,mvar);
-#elif defined(PAR)
- // ToDo: check 2nd arg (mvar) is right
+#if defined(GRAN) || defined(PAR)
+ /* ToDo: check 2nd arg (mvar) is right */
mvar->head = RET_STGCALL2(StgTSO *,unblockOne,mvar->head,mvar);
#else
mvar->head = RET_STGCALL1(StgTSO *,unblockOne,mvar->head);
FE_
}
+FN_(tryPutMVarzh_fast)
+{
+ StgMVar *mvar;
+ const StgInfoTable *info;
+
+ FB_
+ /* args: R1 = MVar, R2 = value */
+
+ mvar = (StgMVar *)R1.p;
+
+#ifdef SMP
+ info = LOCK_CLOSURE(mvar);
+#else
+ info = GET_INFO(mvar);
+#endif
+
+ if (info == &stg_FULL_MVAR_info) {
+
+#ifdef SMP
+ /* unlock the MVar */
+ mvar->header.info = &stg_FULL_MVAR_info;
+#endif
+
+ RET_N(0);
+ }
+
+ mvar->value = R2.cl;
+
+ /* wake up the first thread on the queue, it will continue with the
+ * takeMVar operation and mark the MVar empty again.
+ */
+ if (mvar->head != (StgTSO *)&stg_END_TSO_QUEUE_closure) {
+ ASSERT(mvar->head->why_blocked == BlockedOnMVar);
+#if defined(GRAN) || defined(PAR)
+ /* ToDo: check 2nd arg (mvar) is right */
+ mvar->head = RET_STGCALL2(StgTSO *,unblockOne,mvar->head,mvar);
+#else
+ mvar->head = RET_STGCALL1(StgTSO *,unblockOne,mvar->head);
+#endif
+ if (mvar->head == (StgTSO *)&stg_END_TSO_QUEUE_closure) {
+ mvar->tail = (StgTSO *)&stg_END_TSO_QUEUE_closure;
+ }
+ }
+
+ /* unlocks the MVar in the SMP case */
+ SET_INFO(mvar,&stg_FULL_MVAR_info);
+
+ /* ToDo: yield here for better communication performance? */
+ RET_N(1);
+ FE_
+}
+
/* -----------------------------------------------------------------------------
Stable pointer primitives
------------------------------------------------------------------------- */
/* Is there already a StableName for this heap object? */
if (stable_ptr_table[index].sn_obj == NULL) {
sn_obj = (StgStableName *) (Hp - sizeofW(StgStableName) + 1);
- sn_obj->header.info = &stg_STABLE_NAME_info;
+ SET_HDR(sn_obj,&stg_STABLE_NAME_info,CCCS);
sn_obj->sn = index;
stable_ptr_table[index].sn_obj = (StgClosure *)sn_obj;
} else {
Bytecode object primitives
------------------------------------------------------------------------- */
-#ifdef GHCI
FN_(newBCOzh_fast)
{
/* R1.p = instrs
RET_P(ap);
FE_
}
-#endif
/* -----------------------------------------------------------------------------
Thread I/O blocking primitives