/usr/include/Yap/attvar.h is in yap 6.2.2-6build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | /*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: corout.c *
* Last rev: *
* mods: *
* comments: Co-routining from within YAP *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[]="%W% %G%";
#endif
#ifdef COROUTINING
/*
Attributed variales are controlled by the attvar_record. This includes
three pieces of information:
A pointer to the list of attributes;
The value for the variable, if the variable was bound
Whether we are done with this variable as an attributed variable
An array of NUM_OF_ATTS attributes.
Each attribute contains;
o a time stamp;
o the current value ([] if unbound).
*/
/*
attvar_entry is just a Prolog structure such that the first argument is
a pointer to the next args
*/
typedef struct attvar_struct {
Functor AttFunc; /* functor for attvar */
Term Done; /* if unbound suspension active, if bound terminated */
Term Value; /* value the variable will take */
Term Atts; /* actual data */
} attvar_record;
#define ATT_RECORD_ARITY 3
/*********** tags for suspension variables */
static inline Term
AbsAttVar(attvar_record *attvar_ptr) {
return attvar_ptr->Done;
}
static inline attvar_record *
RepAttVar(Term *var_ptr) {
return (attvar_record *)(var_ptr-1);
}
#endif
|