41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: corout.c *
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* Last rev: *
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* mods: *
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* comments: Co-routining from within YAP *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[]="%W% %G%";
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#endif
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typedef struct sus_record_struct {
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Functor f;
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Term NR; /* next record for same variable */
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Term SG; /* actual suspended goal */
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Term NS; /* other suspended goals */
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} sus_record;
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typedef struct sus_tag_struct {
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Term ActiveSus; /* if unbound suspension active, if bound terminated */
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CELL sus_id;
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Term TimeStamp; /* actual suspended goal */
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Term SG; /* list of suspended goals */
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} sus_tag;
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#ifdef COROUTINING
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/*********** tags for suspension variables */
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#define AbsSuspendedVar(sustag_ptr) AbsAppl(((CELL *)(sustag_ptr)))
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#define RepSuspendedVar(val) ((sus_tag *)RepAppl(val))
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#endif
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