more system_module stuff
This commit is contained in:
Vítor Santos Costa
parent
515d5f3705
commit
1b98e2238c
124
C/modules.c
124
C/modules.c
@ -14,7 +14,7 @@
|
||||
* comments: module support *
|
||||
* *
|
||||
*************************************************************************/
|
||||
#ifdef SCCS
|
||||
#ifdef SCCSLookupSystemModule
|
||||
static char SccsId[] = "%W% %G%";
|
||||
#endif
|
||||
|
||||
@ -26,9 +26,69 @@ static Int current_module(USES_REGS1);
|
||||
static Int current_module1(USES_REGS1);
|
||||
static ModEntry *LookupModule(Term a);
|
||||
static ModEntry *LookupSystemModule(Term a);
|
||||
static ModEntry *GetModuleEntry(Atom at);
|
||||
static ModEntry *FetchModuleEntry(Atom at);
|
||||
|
||||
/**
|
||||
* initialize module data-structure
|
||||
*
|
||||
* @param to parent module (CurrentModule)
|
||||
* @param ae module name.
|
||||
*
|
||||
* @return a new module structure
|
||||
*//** */
|
||||
static ModEntry *
|
||||
initMod( AtomEntry *toname, AtomEntry *ae) {
|
||||
CACHE_REGS
|
||||
ModEntry *n, *parent;
|
||||
|
||||
if (toname == NULL)
|
||||
parent = NULL;
|
||||
else {
|
||||
parent = FetchModuleEntry( toname );
|
||||
}
|
||||
n = (ModEntry *)Yap_AllocAtomSpace(sizeof(*n));
|
||||
INIT_RWLOCK(n->ModRWLock);
|
||||
n->KindOfPE = ModProperty;
|
||||
n->PredForME = NULL;
|
||||
n->NextME = CurrentModules;
|
||||
CurrentModules = n;
|
||||
n->AtomOfME = ae;
|
||||
n->OwnerFile = Yap_ConsultingFile( PASS_REGS1);
|
||||
AddPropToAtom(ae, (PropEntry *)n);
|
||||
Yap_setModuleFlags(n, parent);
|
||||
return n;
|
||||
}
|
||||
|
||||
/**
|
||||
* get predicate entry for ap/arity; create it if neccessary
|
||||
*
|
||||
* @param[in] at
|
||||
*
|
||||
* @return module descriptorxs
|
||||
*/
|
||||
static ModEntry *GetModuleEntry(Atom at)
|
||||
{
|
||||
Prop p0;
|
||||
AtomEntry *ae = RepAtom(at);
|
||||
|
||||
READ_LOCK(ae->ARWLock);
|
||||
p0 = ae->PropsOfAE;
|
||||
while (p0) {
|
||||
ModEntry *me = RepModProp(p0);
|
||||
if (me->KindOfPE == ModProperty) {
|
||||
READ_UNLOCK(ae->ARWLock);
|
||||
return me;
|
||||
}
|
||||
p0 = me->NextOfPE;
|
||||
}
|
||||
READ_UNLOCK(ae->ARWLock);
|
||||
|
||||
return initMod( ( CurrentModule == PROLOG_MODULE ? NULL : AtomOfTerm( CurrentModule ) ), at );
|
||||
}
|
||||
|
||||
/** get entry for ap/arity; assumes one is there. */
|
||||
static ModEntry *FetchModuleEntry(Atom at)
|
||||
/* get predicate entry for ap/arity; create it if neccessary. */
|
||||
{
|
||||
Prop p0;
|
||||
AtomEntry *ae = RepAtom(at);
|
||||
@ -47,40 +107,6 @@ static ModEntry *LookupSystemModule(Term a);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
inline static ModEntry *GetModuleEntry(Atom at)
|
||||
/* Get predicate entry for ap/arity; create it if necessary. */
|
||||
{
|
||||
Prop p0;
|
||||
AtomEntry *ae = RepAtom(at);
|
||||
ModEntry *new, *oat;
|
||||
|
||||
p0 = ae->PropsOfAE;
|
||||
while (p0) {
|
||||
if (p0->KindOfPE == ModProperty) {
|
||||
return RepModProp(p0);
|
||||
}
|
||||
p0 = p0->NextOfPE;
|
||||
}
|
||||
{
|
||||
CACHE_REGS
|
||||
new = (ModEntry *)Yap_AllocAtomSpace(sizeof(*new));
|
||||
INIT_RWLOCK(new->ModRWLock);
|
||||
new->KindOfPE = ModProperty;
|
||||
new->PredForME = NULL;
|
||||
new->NextME = CurrentModules;
|
||||
CurrentModules = new;
|
||||
new->AtomOfME = ae;
|
||||
new->OwnerFile = Yap_ConsultingFile( PASS_REGS1);
|
||||
AddPropToAtom(ae, (PropEntry *)new);
|
||||
if (CurrentModule == 0L || (oat = GetModuleEntry(AtomOfTerm(CurrentModule))) == new) {
|
||||
Yap_setModuleFlags(new, NULL);
|
||||
} else {
|
||||
Yap_setModuleFlags(new, oat);
|
||||
}
|
||||
}
|
||||
return new;
|
||||
}
|
||||
|
||||
Term Yap_getUnknownModule(ModEntry *m) {
|
||||
if (m && m->flags & UNKNOWN_ERROR) {
|
||||
return TermError;
|
||||
@ -109,21 +135,20 @@ bool Yap_getUnknown ( Term mod) {
|
||||
Term Yap_Module_Name(PredEntry *ap) {
|
||||
CACHE_REGS
|
||||
Term mod;
|
||||
if (!ap)
|
||||
return TermUser;
|
||||
if (!ap->ModuleOfPred)
|
||||
/* If the system predicate is a metacall I should return the
|
||||
/* If the system predicate is a meta-call I should return the
|
||||
module for the metacall, which I will suppose has to be
|
||||
reachable from the current module anyway.
|
||||
|
||||
So I will return the current module in case the system
|
||||
predicate is a meta-call. Otherwise it will still work.
|
||||
*/
|
||||
mod = CurrentModule;
|
||||
return TermProlog;
|
||||
else {
|
||||
mod = ap->ModuleOfPred;
|
||||
return ap->ModuleOfPred;
|
||||
}
|
||||
if (mod)
|
||||
return mod;
|
||||
return TermProlog;
|
||||
|
||||
}
|
||||
|
||||
@ -135,13 +160,16 @@ static ModEntry *LookupSystemModule(Term a) {
|
||||
|
||||
/* prolog module */
|
||||
if (a == 0) {
|
||||
return GetModuleEntry(AtomProlog);
|
||||
a = TermProlog;
|
||||
}
|
||||
at = AtomOfTerm(a);
|
||||
me = GetModuleEntry(at);
|
||||
if (!me)
|
||||
return NULL;
|
||||
me->flags |= M_SYSTEM;
|
||||
me->OwnerFile = Yap_ConsultingFile( PASS_REGS1 );
|
||||
return me;}
|
||||
return me;
|
||||
}
|
||||
|
||||
|
||||
static ModEntry *LookupModule(Term a) {
|
||||
@ -201,7 +229,7 @@ void Yap_NewModulePred(Term mod, struct pred_entry *ap) {
|
||||
}
|
||||
|
||||
static Int
|
||||
current_module(USES_REGS1) { /* $current_module(Old,New) */
|
||||
current_module(USES_REGS1) { /* $current_module(Old,N) */
|
||||
Term t;
|
||||
|
||||
if (CurrentModule) {
|
||||
@ -225,7 +253,7 @@ static Int
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static Int change_module(USES_REGS1) { /* $change_module(New) */
|
||||
static Int change_module(USES_REGS1) { /* $change_module(N) */
|
||||
Term mod = Deref(ARG1);
|
||||
LookupModule(mod);
|
||||
CurrentModule = mod;
|
||||
@ -347,8 +375,8 @@ static Int new_system_module( USES_REGS1 )
|
||||
Yap_Error(TYPE_ERROR_ATOM, t, NULL);
|
||||
return false;
|
||||
}
|
||||
me = LookupSystemModule( t );
|
||||
me->OwnerFile = Yap_ConsultingFile( PASS_REGS1);
|
||||
if ((me = LookupSystemModule( t ) ))
|
||||
me->OwnerFile = Yap_ConsultingFile( PASS_REGS1);
|
||||
return me != NULL;
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user