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/* ml-state.c
*
* COPYRIGHT (c) 1993 by AT&T Bell Laboratories.
*
*/
#include <stdarg.h>
#include "ml-base.h"
#include "vproc-state.h"
#include "ml-state.h"
#include "system-signals.h"
#include "tags.h"
#include "ml-values.h"
#include "ml-objects.h"
#include "ml-globals.h"
#include "gc.h"
#include "ml-timer.h"
#include "ml-limits.h"
vproc_state_t *VProc[MAX_NUM_PROCS];
int NumVProcs;
/* local routines */
PVT void InitVProcState (vproc_state_t *vsp);
/* AllocMLState:
*/
ml_state_t *AllocMLState (bool_t isBoot, heap_params_t *heapParams)
{
ml_state_t *msp = NIL(ml_state_t *);
#ifdef MP_SUPPORT
int i;
#endif
#ifdef MP_SUPPORT
for (i = 0; i < MAX_NUM_PROCS; i++) {
if (((VProc[i] = NEW_OBJ(vproc_state_t)) == NIL(vproc_state_t *))
|| ((msp = NEW_OBJ(ml_state_t)) == NIL(ml_state_t *))) {
Die ("unable to allocate ML state vectors");
}
VProc[i]->vp_state = msp;
}
msp = VProc[0]->vp_state;
#else
if (((VProc[0] = NEW_OBJ(vproc_state_t)) == NIL (vproc_state_t *))
|| ((msp = NEW_OBJ(ml_state_t)) == NIL(ml_state_t *))) {
Die ("unable to allocate ML state vector");
}
VProc[0]->vp_state = msp;
#endif /* MP_SUPPORT */
/* allocate and initialize the heap data structures */
InitHeap (msp, isBoot, heapParams);
#ifdef MP_SUPPORT
/* partition the allocation arena given by InitHeap among the
* MAX_NUM_PROCS processors.
*/
NumVProcs = MAX_NUM_PROCS;
PartitionAllocArena(VProc);
/* initialize the per-processor ML state */
for (i = 0; i < MAX_NUM_PROCS; i++) {
int j;
InitVProcState (VProc[i]);
/* single timers are currently shared among multiple processors */
if (i != 0) {
VProc[i]->vp_gcTime0 = VProc[0]->vp_gcTime0;
VProc[i]->vp_gcTime = VProc[0]->vp_gcTime;
}
}
/* initialize the first processor here */
VProc[0]->vp_mpSelf = MP_ProcId ();
VProc[0]->vp_mpState = MP_PROC_RUNNING;
#else
InitVProcState (VProc[0]);
NumVProcs = 1;
#endif /* MP_SUPPORT */
/* initialize the timers */
/** MP_SUPPORT note: for now, only proc 0 has timers **/
ResetTimers (VProc[0]);
return msp;
} /* end of AllocMLState */
/* InitVProcState:
*/
PVT void InitVProcState (vproc_state_t *vsp)
{
int i;
vsp->vp_heap = vsp->vp_state->ml_heap;
vsp->vp_state->ml_vproc = vsp;
vsp->vp_inMLFlag = FALSE;
vsp->vp_handlerPending = FALSE;
vsp->vp_inSigHandler = FALSE;
vsp->vp_numPendingSysSigs = 0;
vsp->vp_numPendingSigs = 0;
vsp->vp_sigCode = 0;
vsp->vp_sigCount = 0;
vsp->vp_nextPendingSig = 0;
vsp->vp_numInQ = 0;
vsp->vp_gcSigState = ML_SIG_IGNORE;
vsp->vp_gcTime0 = NEW_OBJ(Time_t);
vsp->vp_gcTime = NEW_OBJ(Time_t);
for (i = 0; i < NUM_SIGS; i++) {
vsp->vp_pendingSigQ[i].sigNum = 0;
vsp->vp_pendingSigQ[i].count = 0;
}
/* initialize the ML state, including the roots */
InitMLState (vsp->vp_state);
vsp->vp_state->ml_arg = ML_unit;
vsp->vp_state->ml_cont = ML_unit;
vsp->vp_state->ml_closure = ML_unit;
vsp->vp_state->ml_linkReg = ML_unit;
vsp->vp_state->ml_pc = ML_unit;
vsp->vp_state->ml_exnCont = ML_unit;
vsp->vp_state->ml_varReg = ML_unit;
vsp->vp_state->ml_calleeSave[0] = ML_unit;
vsp->vp_state->ml_calleeSave[1] = ML_unit;
vsp->vp_state->ml_calleeSave[2] = ML_unit;
#ifdef MP_SUPPORT
vsp->vp_mpSelf = 0;
vsp->vp_mpState = MP_PROC_NO_PROC;
#endif
} /* end of InitVProcState */
/* InitMLState:
*
* Initialize the ML State vector. Note that we do not initialize the root
* registers here, since this is sometimes called when the roots are live (from
* ML_ApplyFn).
*/
void InitMLState (ml_state_t *msp)
{
msp->ml_storePtr = ML_unit;
#ifdef SOFT_POLL
msp->ml_pollPending = FALSE;
msp->ml_inPollHandler = FALSE;
#endif
} /* end of InitMLState. */
/* SaveCState:
*
* Build a return closure that will save a collection of ML values
* being used by C. The ML values are passed by reference, with NIL
* as termination.
*/
void SaveCState (ml_state_t *msp, ...)
{
va_list ap;
int n, i;
ml_val_t *vp;
va_start (ap, msp);
for (n = 0; (vp = va_arg(ap, ml_val_t *)) != NIL(ml_val_t *); n++)
continue;
va_end (ap);
va_start (ap, msp);
ML_AllocWrite (msp, 0, MAKE_DESC(n, DTAG_record));
for (i = 1; i <= n; i++) {
vp = va_arg (ap, ml_val_t *);
ML_AllocWrite (msp, i, *vp);
}
msp->ml_calleeSave[0] = ML_Alloc(msp, n);
msp->ml_cont = PTR_CtoML(return_c);
va_end (ap);
} /* end of SaveCState */
/* RestoreCState:
*
* Restore a collection of ML values from the return closure.
*/
void RestoreCState (ml_state_t *msp, ...)
{
va_list ap;
int n, i;
ml_val_t *vp;
ml_val_t savedState;
va_start (ap, msp);
savedState = msp->ml_calleeSave[0];
n = OBJ_LEN(savedState);
for (i = 0; i < n; i++) {
vp = va_arg (ap, ml_val_t *);
*vp = REC_SEL(savedState, i);
}
va_end (ap);
} /* end of RestoreCState */
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