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b88dcb86ab
yap-6.3/C/pl-yap.c
Vítor Santos Costa 9a71f20caa sysError
2013-01-21 09:37:32 +00:00

1387 lines
26 KiB
C
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/* YAP support for some low-level SWI stuff */
#define PL_KERNEL 1
#include <stdio.h>
#include "Yap.h"
#include "Yatom.h"
#include "pl-incl.h"
#if HAVE_MATH_H
#include <math.h>
#endif
#define Quote_illegal_f 1
#define Ignore_ops_f 2
#define Handle_vars_f 4
#define Use_portray_f 8
#define To_heap_f 16
#define Unfold_cyclics_f 32
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#define LOCK() PL_LOCK(L_PLFLAG)
#define UNLOCK() PL_UNLOCK(L_PLFLAG)
int fileerrors;
PL_local_data_t lds;
gds_t gds;
static atom_t
uncachedCodeToAtom(int chrcode)
{ if ( chrcode < 256 )
{ char tmp[2];
tmp[0] = chrcode;
tmp[1] = '\0';
return lookupAtom(tmp, 1);
} else
{ pl_wchar_t tmp[2];
tmp[0] = chrcode;
tmp[1] = '\0';
return (atom_t)YAP_LookupWideAtom(tmp);
}
}
atom_t
codeToAtom(int chrcode)
{ atom_t a;
if ( chrcode == EOF )
return ATOM_end_of_file;
assert(chrcode >= 0);
if ( chrcode < (1<<15) )
{ int page = chrcode / 256;
int entry = chrcode % 256;
atom_t *pv;
if ( !(pv=GD->atoms.for_code[page]) )
{ pv = PL_malloc(256*sizeof(atom_t));
memset(pv, 0, 256*sizeof(atom_t));
GD->atoms.for_code[page] = pv;
}
if ( !(a=pv[entry]) )
{ a = pv[entry] = uncachedCodeToAtom(chrcode);
}
} else
{ a = uncachedCodeToAtom(chrcode);
}
return a;
}
word
globalString(size_t size, char *s)
{
return Yap_MkBlobStringTerm(s, size);
}
word
globalWString(size_t size, wchar_t *s)
{
return Yap_MkBlobWideStringTerm(s, size);
}
int
PL_rethrow(void)
{ GET_LD
if ( LD->exception.throw_environment )
longjmp(LD->exception.throw_environment->exception_jmp_env, 1);
fail;
}
int
saveWakeup(wakeup_state *state, int forceframe ARG_LD)
{
return 0;
}
void
restoreWakeup(wakeup_state *state ARG_LD)
{
}
int
callProlog(module_t module, term_t goal, int flags, term_t *ex )
{ GET_LD
term_t g = PL_new_term_ref();
functor_t fd;
predicate_t proc;
if ( ex )
*ex = 0;
PL_strip_module(goal, &module, g);
if ( !PL_get_functor(g, &fd) )
{ PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_callable, goal);
if ( ex )
*ex = exception_term;
fail;
}
proc = PL_pred(fd, module);
{ int arity = arityFunctor(fd);
term_t args = PL_new_term_refs(arity);
qid_t qid;
int n, rval;
for(n=0; n<arity; n++)
_PL_get_arg(n+1, g, args+n);
qid = PL_open_query(module, flags, proc, args);
rval = PL_next_solution(qid);
if ( !rval && ex )
*ex = PL_exception(qid);
PL_cut_query(qid);
return rval;
}
}
extern YAP_Term Yap_InnerEval(YAP_Term t);
inline static YAP_Term
Yap_Eval(YAP_Term t)
{
if (t == 0L || ( !YAP_IsVarTerm(t) && (YAP_IsIntTerm(t) || YAP_IsFloatTerm(t)) ))
return t;
return Yap_InnerEval(t);
}
IOENC
Yap_DefaultEncoding(void)
{
GET_LD
return LD->encoding;
}
void
Yap_SetDefaultEncoding(IOENC new_encoding)
{
GET_LD
LD->encoding = new_encoding;
}
int
PL_qualify(term_t raw, term_t qualified)
{ GET_LD
Module m = NULL;
term_t mname;
if ( !(mname = PL_new_term_ref()) ||
!PL_strip_module(raw, &m, qualified) )
return FALSE;
/* modules are terms in YAP */
Yap_PutInSlot(mname, (Term)m PASS_REGS);
return PL_cons_functor(qualified, FUNCTOR_colon2, mname, qualified);
}
int
valueExpression(term_t t, Number r ARG_LD)
{
YAP_Term t0 = Yap_Eval(YAP_GetFromSlot(t));
if (YAP_IsIntTerm(t0)) {
r->type = V_INTEGER;
r->value.i = YAP_IntOfTerm(t0);
return 1;
}
if (YAP_IsFloatTerm(t0)) {
r->type = V_FLOAT;
r->value.f = YAP_FloatOfTerm(t0);
return 1;
}
#ifdef O_GMP
if (YAP_IsBigNumTerm(t0)) {
r->type = V_MPZ;
mpz_init(r->value.mpz);
YAP_BigNumOfTerm(t0, r->value.mpz);
return 1;
}
if (YAP_IsRationalTerm(t0)) {
r->type = V_MPQ;
mpq_init(r->value.mpq);
YAP_RationalOfTerm(t0, r->value.mpq);
return 1;
}
#endif
return 0;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
toIntegerNumber(Number n, int flags)
Convert a number to an integer. Default, only rationals that happen to
be integer are converted. If TOINT_CONVERT_FLOAT is present, floating
point numbers are converted if they represent integers. If also
TOINT_TRUNCATE is provided non-integer floats are truncated to integers.
Note that if a double is out of range for int64_t, it never has a
fractional part.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
static int
double_in_int64_range(double x)
{ int k;
double y = frexp(x, &k);
if ( k < 8*(int)sizeof(int64_t) ||
(y == -0.5 && k == 8*(int)sizeof(int64_t)) )
return TRUE;
return FALSE;
}
int
toIntegerNumber(Number n, int flags)
{
switch(n->type)
{ case V_INTEGER:
succeed;
#ifdef O_GMP
case V_MPZ:
succeed;
case V_MPQ: /* never from stacks iff integer */
if ( mpz_cmp_ui(mpq_denref(n->value.mpq), 1L) == 0 )
{ mpz_clear(mpq_denref(n->value.mpq));
n->value.mpz[0] = mpq_numref(n->value.mpq)[0];
n->type = V_MPZ;
succeed;
}
fail;
#endif
case V_FLOAT:
if ( (flags & TOINT_CONVERT_FLOAT) )
{ if ( double_in_int64_range(n->value.f) )
{ int64_t l = (int64_t)n->value.f;
if ( (flags & TOINT_TRUNCATE) ||
(double)l == n->value.f )
{ n->value.i = l;
n->type = V_INTEGER;
return TRUE;
}
return FALSE;
#ifdef O_GMP
} else
{ mpz_init_set_d(n->value.mpz, n->value.f);
n->type = V_MPZ;
return TRUE;
#endif
}
}
return FALSE;
}
assert(0);
fail;
}
int
_PL_unify_atomic(term_t t, PL_atomic_t a)
{
GET_LD
if (IsApplTerm(a) || IsAtomTerm(a))
return Yap_unify(Yap_GetFromSlot(t PASS_REGS), a);
return PL_unify_atom(t, a);
}
int
_PL_unify_string(term_t t, word w)
{
CACHE_REGS
return Yap_unify(Yap_GetFromSlot(t PASS_REGS), w);
}
word lookupAtom(const char *s, size_t len)
{
YAP_Atom at;
/* dirty trick to ensure s is null terminated */
char *st = (char *)s;
st[len] = '\0';
if (len >= strlen(s)) {
at = YAP_LookupAtom(st);
} else {
char * buf = PL_malloc(len+1);
if (!buf)
return 0;
strncpy(buf,s,len);
at = YAP_LookupAtom(buf);
PL_free(buf);
}
Yap_AtomIncreaseHold(at);
return (word)at;
}
atom_t lookupUCSAtom(const pl_wchar_t *s, size_t len)
{
YAP_Atom at;
if (len >= wcslen(s)) {
at = YAP_LookupWideAtom(s);
} else {
pl_wchar_t * buf = PL_malloc((len+1)*sizeof(pl_wchar_t));
if (!buf)
return 0;
wcsncpy(buf,s,len);
at = YAP_LookupWideAtom(buf);
PL_free(buf);
}
Yap_AtomIncreaseHold(at);
return (atom_t)at;
}
/*******************************
* OPTIONS *
*******************************/
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Variable argument list:
atom_t name
int type OPT_ATOM, OPT_STRING, OPT_BOOL, OPT_INT, OPT_LONG
pointer value
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#define MAXOPTIONS 32
typedef union
{ bool *b; /* boolean value */
long *l; /* long value */
int *i; /* integer value */
char **s; /* string value */
word *a; /* atom value */
term_t *t; /* term-reference */
void *ptr; /* anonymous pointer */
} optvalue;
int
get_atom_ptr_text(Atom a, PL_chars_t *text)
{
YAP_Atom ya = (YAP_Atom)a;
if (YAP_IsWideAtom(ya)) {
pl_wchar_t *name = (pl_wchar_t *)YAP_WideAtomName(ya);
text->text.w = name;
text->length = wcslen(name);
text->encoding = ENC_WCHAR;
} else
{ char *name = (char *)YAP_AtomName(ya);
text->text.t = name;
text->length = strlen(name);
text->encoding = ENC_ISO_LATIN_1;
}
text->storage = PL_CHARS_HEAP;
text->canonical = TRUE;
succeed;
}
int
get_atom_text(atom_t atom, PL_chars_t *text)
{ Atom a = (Atom)atomValue(atom);
return get_atom_ptr_text(a, text);
}
int
get_string_text(word w, PL_chars_t *text ARG_LD)
{
CELL fl = RepAppl(w)[1];
if (fl == BLOB_STRING) {
text->text.t = Yap_BlobStringOfTerm(w);
text->encoding = ENC_ISO_LATIN_1;
text->length = strlen(text->text.t);
} else {
text->text.w = Yap_BlobWideStringOfTerm(w);
text->encoding = ENC_WCHAR;
text->length = wcslen(text->text.w);
}
text->storage = PL_CHARS_STACK;
text->canonical = TRUE;
return TRUE;
}
void
PL_get_number(term_t l, number *n) {
GET_LD
YAP_Term t = valHandle(l);
if (YAP_IsIntTerm(t)) {
n->type = V_INTEGER;
n->value.i = YAP_IntOfTerm(t);
#ifdef O_GMP
} else if (YAP_IsBigNumTerm(t)) {
n->type = V_MPZ;
mpz_init(n->value.mpz);
YAP_BigNumOfTerm(t, n->value.mpz);
} else {
n->type = V_MPQ;
mpq_init(n->value.mpq);
YAP_RationalOfTerm(t, &n->value.mpq);
#endif
}
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Formatting a float. This is very complicated as we must write floats
such that it can be read as a float. This means using the conventions of
the C locale and if the float happens to be integer as <int>.0.
Switching the locale is no option as locale handling is not thread-safe
and may have unwanted consequences for embedding. There is a intptr_t
discussion on the very same topic on the Python mailinglist. Many hacks
are proposed, none is very satisfactory. Richard O'Keefe suggested to
use ecvt(), fcvt() and gcvt(). These are not thread-safe. The GNU C
library provides *_r() variations that can do the trick. An earlier
patch used localeconv() to find the decimal point, but this is both
complicated and not thread-safe.
Finally, with help of Richard we decided to replace the first character
that is not a digit nor [eE], as this must be the decimal point.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#define isDigit(c) ((c) >= '0' && (c) <= '9')
intptr_t
lengthList(term_t list, int errors)
{ GET_LD
intptr_t length = 0;
Word l = YAP_AddressFromSlot(list);
Word tail;
length = skip_list(l, &tail PASS_LD);
if ( isNil(*tail) )
return length;
if ( errors )
PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_list, wordToTermRef(l));
return isVar(*tail) ? -2 : -1;
}
int raiseStackOverflow(int overflow)
{
return overflow;
}
/*******************************
* FEATURES *
*******************************/
int
PL_set_prolog_flag(const char *name, int type, ...)
{ va_list args;
int rval = TRUE;
int flags = (type & FF_MASK);
va_start(args, type);
switch(type & ~FF_MASK)
{ case PL_BOOL:
{ int val = va_arg(args, int);
setPrologFlag(name, FT_BOOL|flags, val, 0);
break;
}
case PL_ATOM:
{ const char *v = va_arg(args, const char *);
#ifndef __YAP_PROLOG__
if ( !GD->initialised )
initAtoms();
#endif
setPrologFlag(name, FT_ATOM|flags, v);
break;
}
case PL_INTEGER:
{ intptr_t v = va_arg(args, intptr_t);
setPrologFlag(name, FT_INTEGER|flags, v);
break;
}
default:
rval = FALSE;
}
va_end(args);
return rval;
}
int
PL_unify_chars(term_t t, int flags, size_t len, const char *s)
{ PL_chars_t text;
term_t tail;
int rc;
if ( len == (size_t)-1 )
len = strlen(s);
text.text.t = (char *)s;
text.encoding = ((flags&REP_UTF8) ? ENC_UTF8 : \
(flags&REP_MB) ? ENC_ANSI : ENC_ISO_LATIN_1);
text.storage = PL_CHARS_HEAP;
text.length = len;
text.canonical = FALSE;
flags &= ~(REP_UTF8|REP_MB|REP_ISO_LATIN_1);
if ( (flags & PL_DIFF_LIST) )
{ tail = t+1;
flags &= (~PL_DIFF_LIST);
} else
{ tail = 0;
}
rc = PL_unify_text(t, tail, &text, flags);
PL_free_text(&text);
return rc;
}
X_API int PL_handle_signals(void)
{
GET_LD
if ( !LD || LD->critical || !LD->signal.pending )
return 0;
if (LD->signal.pending == 2) {
Yap_Error(PURE_ABORT, TermNil, "abort from console");
}
// fprintf(stderr,"PL_handle_signals not implemented\n");
return 1;
}
void
outOfCore()
{ fprintf(stderr,"Could not allocate memory: %s", OsError());
exit(1);
}
int
priorityOperator(Module m, atom_t atom)
{
YAP_Term mod = (YAP_Term)m;
if (!m)
mod = YAP_CurrentModule();
return YAP_MaxOpPriority(YAP_AtomFromSWIAtom(atom), mod);
}
int
currentOperator(Module m, atom_t name, int kind, int *type, int *priority)
{
YAP_Term mod = (YAP_Term)m;
int opkind, yap_type;
if (!m)
mod = YAP_CurrentModule();
switch (kind) {
case OP_PREFIX:
opkind = 2;
break;
case OP_INFIX:
opkind = 0;
break;
case OP_POSTFIX:
default:
opkind = 1;
}
if (!YAP_OpInfo(YAP_AtomFromSWIAtom(name), mod, opkind, &yap_type, priority)) {
return FALSE;
}
switch(yap_type) {
case 1:
*type = OP_XFX;
break;
case 2:
*type = OP_XFY;
break;
case 3:
*type = OP_YFX;
break;
case 4:
*type = OP_XFX;
break;
case 5:
*type = OP_XF;
break;
case 6:
*type = OP_YF;
break;
case 7:
*type = OP_FX;
break;
default:
*type = OP_FY;
break;
}
return 1;
}
int
numberVars(term_t t, nv_options *opts, int n ARG_LD) {
return Yap_NumberVars(YAP_GetFromSlot(t), n, opts->singletons);
}
/*******************************
* PROMOTION *
*******************************/
static int
check_float(double f)
{
#ifdef HAVE_FPCLASSIFY
switch(fpclassify(f))
{ case FP_NAN:
return PL_error(NULL, 0, NULL, ERR_AR_UNDEF);
break;
case FP_INFINITE:
return PL_error(NULL, 0, NULL, ERR_AR_OVERFLOW);
break;
}
#else
#ifdef HAVE_FPCLASS
switch(fpclass(f))
{ case FP_SNAN:
case FP_QNAN:
return PL_error(NULL, 0, NULL, ERR_AR_UNDEF);
break;
case FP_NINF:
case FP_PINF:
return PL_error(NULL, 0, NULL, ERR_AR_OVERFLOW);
break;
case FP_NDENORM: /* pos/neg denormalized non-zero */
case FP_PDENORM:
case FP_NNORM: /* pos/neg normalized non-zero */
case FP_PNORM:
case FP_NZERO: /* pos/neg zero */
case FP_PZERO:
break;
}
#else
#ifdef HAVE__FPCLASS
switch(_fpclass(f))
{ case _FPCLASS_SNAN:
case _FPCLASS_QNAN:
return PL_error(NULL, 0, NULL, ERR_AR_UNDEF);
break;
case _FPCLASS_NINF:
case _FPCLASS_PINF:
return PL_error(NULL, 0, NULL, ERR_AR_OVERFLOW);
break;
}
#else
#ifdef HAVE_ISNAN
if ( isnan(f) )
return PL_error(NULL, 0, NULL, ERR_AR_UNDEF);
#endif
#ifdef HAVE_ISINF
if ( isinf(f) )
return PL_error(NULL, 0, NULL, ERR_AR_OVERFLOW);
#endif
#endif /*HAVE__FPCLASS*/
#endif /*HAVE_FPCLASS*/
#endif /*HAVE_FPCLASSIFY*/
return TRUE;
}
int
promoteToFloatNumber(Number n)
{ switch(n->type)
{ case V_INTEGER:
n->value.f = (double)n->value.i;
n->type = V_FLOAT;
break;
#ifdef O_GMP
case V_MPZ:
{ double val = mpz_get_d(n->value.mpz);
if ( !check_float(val) )
return FALSE;
clearNumber(n);
n->value.f = val;
n->type = V_FLOAT;
break;
}
case V_MPQ:
{ double val = mpq_get_d(n->value.mpq);
if ( !check_float(val) )
return FALSE;
clearNumber(n);
n->value.f = val;
n->type = V_FLOAT;
break;
}
#endif
case V_FLOAT:
break;
}
return TRUE;
}
int
PL_get_list_nchars(term_t l, size_t *length, char **s, unsigned int flags)
{ Buffer b;
CVT_result result;
if ( (b = codes_or_chars_to_buffer(l, flags, FALSE, &result)) )
{ char *r;
size_t len = entriesBuffer(b, char);
if ( length )
*length = len;
addBuffer(b, EOS, char);
r = baseBuffer(b, char);
if ( flags & BUF_MALLOC )
{ *s = PL_malloc(len+1);
memcpy(*s, r, len+1);
unfindBuffer(flags);
} else
*s = r;
succeed;
}
fail;
}
void *
PL_malloc_uncollectable(size_t sz)
{
return malloc(sz);
}
int
PL_get_list_chars(term_t l, char **s, unsigned flags)
{ return PL_get_list_nchars(l, NULL, s, flags);
}
int
PL_unify_wchars_diff(term_t t, term_t tail, int flags,
size_t len, const pl_wchar_t *s)
{ PL_chars_t text;
int rc;
if ( len == (size_t)-1 )
len = wcslen(s);
text.text.w = (pl_wchar_t *)s;
text.encoding = ENC_WCHAR;
text.storage = PL_CHARS_HEAP;
text.length = len;
text.canonical = FALSE;
rc = PL_unify_text(t, tail, &text, flags);
PL_free_text(&text);
return rc;
}
int
PL_get_wchars(term_t l, size_t *length, pl_wchar_t **s, unsigned flags)
{ GET_LD
PL_chars_t text;
if ( !PL_get_text(l, &text, flags) )
return FALSE;
PL_promote_text(&text);
PL_save_text(&text, flags);
if ( length )
*length = text.length;
*s = text.text.w;
return TRUE;
}
int
PL_get_nchars(term_t l, size_t *length, char **s, unsigned flags)
{ GET_LD
PL_chars_t text;
if ( !PL_get_text(l, &text, flags) )
return FALSE;
if ( PL_mb_text(&text, flags) )
{ PL_save_text(&text, flags);
if ( length )
*length = text.length;
*s = text.text.t;
return TRUE;
} else
{ PL_free_text(&text);
return FALSE;
}
}
int
PL_get_chars(term_t t, char **s, unsigned flags)
{ return PL_get_nchars(t, NULL, s, flags);
}
char *Yap_TermToString(Term t, char *s, size_t sz, size_t *length, int *encoding, int flags);
char *
Yap_TermToString(Term t, char *s, size_t sz, size_t *length, int *encoding, int flags)
{
CACHE_REGS
Int l;
Yap_StartSlots( PASS_REGS1 );
l = Yap_InitSlot(t PASS_REGS );
{ IOENC encodings[3];
IOENC *enc;
char *r, buf[256];
encodings[0] = ENC_ISO_LATIN_1;
encodings[1] = ENC_WCHAR;
encodings[2] = ENC_UNKNOWN;
for(enc = encodings; *enc != ENC_UNKNOWN; enc++)
{
int64_t size;
IOSTREAM *fd;
if (s) {
r = s;
} else {
r = buf;
}
fd = Sopenmem(&r, &sz, "w");
fd->encoding = *enc;
if ( PL_write_term(fd, l, 1200, flags) &&
Sputcode(EOS, fd) >= 0 &&
Sflush(fd) >= 0 )
{ *encoding = *enc;
size = Stell64(fd);
if ( *enc == ENC_ISO_LATIN_1 )
{
*length = size-1;
} else
{
*length = (size/sizeof(pl_wchar_t))-1;
}
/* found, just check if using local space */
if (r == buf) {
char *bf = malloc(*length+1);
if (!bf)
return NULL;
strncpy(bf,buf,*length+1);
r = bf;
}
/* go away */
Yap_CloseSlots( PASS_REGS1 );
return r;
} else
{ Sclose(fd);
}
}
/* failed */
if ( r != s && r != buf ) {
Sfree(r);
}
}
Yap_CloseSlots( PASS_REGS1 );
return NULL;
}
X_API int
PL_ttymode(IOSTREAM *s)
{ GET_LD
if ( s == Suser_input )
{ if ( !truePrologFlag(PLFLAG_TTY_CONTROL) ) /* -tty in effect */
return PL_NOTTY;
if ( ttymode == TTY_RAW ) /* get_single_char/1 and friends */
return PL_RAWTTY;
return PL_COOKEDTTY; /* cooked (readline) input */
} else
return PL_NOTTY;
}
char *
PL_prompt_string(int fd)
{ if ( fd == 0 )
{ atom_t a = PrologPrompt(); /* TBD: deal with UTF-8 */
if ( a )
{
Atom at = YAP_AtomFromSWIAtom(a);
if (!IsWideAtom(at) && !IsBlob(at)) {
return RepAtom(at)->StrOfAE;
}
}
}
return NULL;
}
X_API void
PL_prompt_next(int fd)
{ GET_LD
if ( fd == 0 )
LD->prompt.next = TRUE;
}
/* just a stub for now */
int
warning(const char *fm, ...)
{ va_list args;
va_start(args, fm);
fprintf(stderr,"warning: %s\n", fm);
va_end(args);
return TRUE;
}
#if defined(HAVE_SELECT) && !defined(__WINDOWS__) && !defined(__CYGWIN__)
#ifdef __WINDOWS__
#include <winsock2.h>
#endif
static int
input_on_fd(int fd)
{ fd_set rfds;
struct timeval tv;
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 0;
return select(fd+1, &rfds, NULL, NULL, &tv) != 0;
}
#else
#define input_on_fd(fd) 1
#endif
PL_dispatch_hook_t
PL_dispatch_hook(PL_dispatch_hook_t hook)
{ PL_dispatch_hook_t old = GD->foreign.dispatch_events;
GD->foreign.dispatch_events = hook;
return old;
}
X_API int
PL_dispatch(int fd, int wait)
{ if ( wait == PL_DISPATCH_INSTALLED )
return GD->foreign.dispatch_events ? TRUE : FALSE;
if ( GD->foreign.dispatch_events && PL_thread_self() == 1 )
{ if ( wait == PL_DISPATCH_WAIT )
{ while( !input_on_fd(fd) )
{ if ( PL_handle_signals() < 0 )
return FALSE;
(*GD->foreign.dispatch_events)(fd);
}
} else
{ (*GD->foreign.dispatch_events)(fd);
if ( PL_handle_signals() < 0 )
return FALSE;
}
}
return TRUE;
}
/* SWI: int PL_get_atom(term_t t, YAP_Atom *a)
YAP: YAP_Atom YAP_AtomOfTerm(Term) */
int PL_get_atom__LD(term_t ts, atom_t *a ARG_LD)
{
CACHE_REGS
YAP_Term t = Yap_GetFromSlot(ts PASS_REGS);
if ( !IsAtomTerm(t))
return 0;
*a = YAP_SWIAtomFromAtom(AtomOfTerm(t));
return 1;
}
void PL_put_term__LD(term_t d, term_t s ARG_LD)
{
CACHE_REGS
Yap_PutInSlot(d,Yap_GetFromSlot(s PASS_REGS) PASS_REGS);
}
term_t PL_new_term_ref__LD(ARG1_LD)
{
CACHE_REGS
term_t to = Yap_NewSlots(1 PASS_REGS);
return to;
}
int PL_is_variable__LD(term_t ts ARG_LD)
{
CACHE_REGS
YAP_Term t = Yap_GetFromSlot(ts PASS_REGS);
return YAP_IsVarTerm(t);
}
int PL_unify_atom__LD(term_t t, atom_t at ARG_LD)
{
CACHE_REGS
YAP_Term cterm = MkAtomTerm(YAP_AtomFromSWIAtom(at));
return YAP_Unify(Yap_GetFromSlot(t PASS_REGS),cterm);
}
/* SWI: int PL_unify_integer(term_t ?t, long n)
YAP long int unify(YAP_Term* a, Term* b) */
int PL_unify_integer__LD(term_t t, intptr_t i ARG_LD)
{
CACHE_REGS
Term iterm = MkIntegerTerm(i);
return Yap_unify(Yap_GetFromSlot(t PASS_REGS),iterm);
}
#ifdef _WIN32
#include <windows.h>
#if O_PLMT
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
PL_w32thread_raise(DWORD id, int sig)
Sets the signalled mask for a specific Win32 thread. This is a
partial work-around for the lack of proper asynchronous signal
handling in the Win32 platform.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
static int thread_highest_id = 1;
X_API int
PL_w32thread_raise(DWORD id, int sig)
{ int i;
if ( sig < 0 || sig > MAXSIGNAL )
return FALSE; /* illegal signal */
LOCK();
for(i = 1; i <= thread_highest_id; i++)
{ PL_thread_info_t *info = GD->thread.threads[i];
if ( info && info->w32id == id && info->thread_data )
{ Yap_signal(sig); //raiseSignal(info->thread_data, sig);
if ( info->w32id )
PostThreadMessage(info->w32id, WM_SIGNALLED, 0, 0L);
UNLOCK();
DEBUG(1, Sdprintf("Signalled %d to thread %d\n", sig, i));
return TRUE;
}
}
UNLOCK();
return FALSE; /* can't find thread */
}
#else
int
PL_w32thread_raise(DWORD id, int sig)
{ return PL_raise(sig);
}
#endif
#endif /*__WINDOWS__*/
X_API int
PL_raise(int sig)
{
if (sig < SIG_PROLOG_OFFSET) {
Yap_signal(YAP_INT_SIGNAL);
return 1;
} else if (sig == SIG_PLABORT) {
YAP_signal(0x40); /* YAP_INT_SIGNAL */
return 1;
}
return 0;
}
extern size_t PL_utf8_strlen(const char *s, size_t len);
X_API size_t
PL_utf8_strlen(const char *s, size_t len)
{ return utf8_strlen(s, len);
}
void
PL_add_to_protocol(const char *buf, size_t n)
{ protocol(buf, n);
}
void
PL_license(const char *license, const char *module)
{
/* unimplemented */
}
bool
systemMode(bool accept)
{
return FALSE;
}
term_t
Yap_fetch_module_for_format(term_t args, YAP_Term *modp) {
YAP_Term nmod;
YAP_Term nt = YAP_StripModule(YAP_GetFromSlot(args), &nmod);
*modp = YAP_SetCurrentModule(nmod);
if (!nt) {
return args;
}
return YAP_InitSlot(nt);
}
extern word pl_readline(term_t flag);
word
pl_readline(term_t flag)
{
return 0;
}
static Term
StreamPosition(IOSTREAM *st)
{ GET_LD
Term t[4];
if (!st)
st = Suser_input;
t[0] = MkIntegerTerm(st->posbuf.charno);
t[1] = MkIntegerTerm(st->posbuf.lineno);
t[2] = MkIntegerTerm(st->posbuf.linepos);
t[3] = MkIntegerTerm(st->posbuf.byteno);
return Yap_MkApplTerm(FunctorStreamPos,4,t);
}
extern Term Yap_StreamPosition(IOSTREAM *st);
Term
Yap_StreamPosition(IOSTREAM *st)
{
return StreamPosition(st);
}
IOSTREAM *STD_PROTO(Yap_Scurin, (void));
IOSTREAM *
Yap_Scurin(void)
{
GET_LD
return Scurin;
}
int
isWideAtom(atom_t atom)
{
Atom a = (Atom)atomValue(atom);
return IsWideAtom(a);
}
wchar_t *
nameOfWideAtom(atom_t atom)
{
Atom a = (Atom)atomValue(atom);
return RepAtom(a)->WStrOfAE;
}
access_level_t
setAccessLevel(access_level_t accept)
{ GET_LD
bool old;
old = LD->prolog_flag.access_level;
LD->prolog_flag.access_level = accept;
return old;
}
static bool
vsysError(const char *fm, va_list args)
{ GET_LD
static int active = 0;
switch ( active++ )
{ case 1:
PL_halt(3);
case 2:
abort();
}
#ifdef O_PLMT
Sfprintf(Serror, "[PROLOG SYSTEM ERROR: Thread %d\n\t",
PL_thread_self());
#else
Sfprintf(Serror, "[PROLOG SYSTEM ERROR:\n\t");
#endif
Svfprintf(Serror, fm, args);
#if defined(O_DEBUGGER)
Sfprintf(Serror, "\n\nPROLOG STACK:\n");
PL_backtrace(10, 0);
Sfprintf(Serror, "]\n");
#endif /*O_DEBUGGER*/
#ifdef HAVE_GETPID
Sfprintf(Serror, "\n[pid=%d] Action? ", getpid());
#else
Sfprintf(Serror, "\nAction? ");
#endif
Sflush(Soutput);
ResetTty();
PL_halt(3);
return FALSE; /* not reached */
}
bool
sysError(const char *fm, ...)
{ va_list args;
va_start(args, fm);
vsysError(fm, args);
va_end(args);
PL_fail;
}
#if THREADS
#define COUNT_MUTEX_INITIALIZER(name) \
{ PTHREAD_MUTEX_INITIALIZER, \
name, \
0L \
}
static int
recursive_attr(pthread_mutexattr_t **ap)
{ static int done;
static pthread_mutexattr_t attr;
int rc;
if ( done )
{ *ap = &attr;
return 0;
}
PL_LOCK(L_THREAD);
if ( done )
{ PL_UNLOCK(L_THREAD);
*ap = &attr;
return 0;
}
if ( (rc=pthread_mutexattr_init(&attr)) )
goto error;
#ifdef HAVE_PTHREAD_MUTEXATTR_SETTYPE
if ( (rc=pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE)) )
goto error;
#else
#ifdef HAVE_PTHREAD_MUTEXATTR_SETKIND_NP
if ( (rc=pthread_mutexattr_setkind_np(&attr, PTHREAD_MUTEX_RECURSIVE_NP)) )
goto error;
#endif
#endif
done = TRUE;
PL_UNLOCK(L_THREAD);
*ap = &attr;
return 0;
error:
PL_UNLOCK(L_THREAD);
return rc;
}
int
recursiveMutexInit(recursiveMutex *m)
{
int rc;
pthread_mutexattr_t *attr;
if ( (rc=recursive_attr(&attr)) )
return rc;
return pthread_mutex_init(m, attr);
}
counting_mutex _PL_mutexes[] =
{ COUNT_MUTEX_INITIALIZER("L_MISC"),
COUNT_MUTEX_INITIALIZER("L_ALLOC"),
COUNT_MUTEX_INITIALIZER("L_ATOM"),
COUNT_MUTEX_INITIALIZER("L_FLAG"),
COUNT_MUTEX_INITIALIZER("L_FUNCTOR"),
COUNT_MUTEX_INITIALIZER("L_RECORD"),
COUNT_MUTEX_INITIALIZER("L_THREAD"),
COUNT_MUTEX_INITIALIZER("L_PREDICATE"),
COUNT_MUTEX_INITIALIZER("L_MODULE"),
COUNT_MUTEX_INITIALIZER("L_TABLE"),
COUNT_MUTEX_INITIALIZER("L_BREAK"),
COUNT_MUTEX_INITIALIZER("L_FILE"),
COUNT_MUTEX_INITIALIZER("L_PLFLAG"),
COUNT_MUTEX_INITIALIZER("L_OP"),
COUNT_MUTEX_INITIALIZER("L_INIT"),
COUNT_MUTEX_INITIALIZER("L_TERM"),
COUNT_MUTEX_INITIALIZER("L_GC"),
COUNT_MUTEX_INITIALIZER("L_AGC"),
COUNT_MUTEX_INITIALIZER("L_FOREIGN"),
COUNT_MUTEX_INITIALIZER("L_OS")
};
#endif
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