| e576bb | 2002-10-11 | Martin Nilsson | | |
| d2361e | 2003-06-30 | Martin Stjernholm | | || $Id: cyclic.c,v 1.11 2003/06/30 17:06:08 mast Exp $
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| e576bb | 2002-10-11 | Martin Nilsson | | */
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| 1b10db | 2002-10-08 | Martin Nilsson | |
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| 24ddc7 | 1998-03-28 | Henrik Grubbström (Grubba) | | #include "global.h"
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | #include "cyclic.h"
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| d2361e | 2003-06-30 | Martin Stjernholm | | RCSID("$Id: cyclic.c,v 1.11 2003/06/30 17:06:08 mast Exp $");
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| 24ddc7 | 1998-03-28 | Henrik Grubbström (Grubba) | |
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | #define CYCLIC_HASH_SIZE 4711
CYCLIC *cyclic_hash[CYCLIC_HASH_SIZE];
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| 545ca8 | 1997-10-07 | Fredrik Hübinette (Hubbe) | | static void low_unlink_cyclic(CYCLIC *c)
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | {
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| c7241b | 2000-08-10 | Henrik Grubbström (Grubba) | | size_t h;
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | CYCLIC **p;
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| d2361e | 2003-06-30 | Martin Stjernholm | | h=PTR_TO_INT(c->id);
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | h*=33;
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| d2361e | 2003-06-30 | Martin Stjernholm | | h|=PTR_TO_INT(c->a);
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | h*=33;
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| d2361e | 2003-06-30 | Martin Stjernholm | | h|=PTR_TO_INT(c->b);
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | h*=33;
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| d2361e | 2003-06-30 | Martin Stjernholm | | h|=PTR_TO_INT(c->th);
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | h*=33;
h%=CYCLIC_HASH_SIZE;
for(p=cyclic_hash+h;*p;p=&(p[0]->next))
{
if(c == *p)
{
*p=c->next;
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| 3b6bff | 2002-12-01 | Martin Stjernholm | | #ifdef CYCLIC_DEBUG
fprintf (stderr, "%s: END_CYCLIC a=%p b=%p: no cycle\n", c->id, c->a, c->b);
#endif
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | return;
}
}
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| 5aad93 | 2002-08-15 | Marcus Comstedt | | Pike_fatal("Unlink cyclic on lost cyclic struct.\n");
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | }
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| 545ca8 | 1997-10-07 | Fredrik Hübinette (Hubbe) | | void unlink_cyclic(CYCLIC *c)
{
UNSET_ONERROR(c->onerr);
low_unlink_cyclic(c);
}
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | void *begin_cyclic(CYCLIC *c,
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| 3b6bff | 2002-12-01 | Martin Stjernholm | | char *id,
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | void *th,
void *a,
void *b)
{
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| c7241b | 2000-08-10 | Henrik Grubbström (Grubba) | | size_t h;
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| 14bb59 | 2000-05-06 | Fredrik Hübinette (Hubbe) | | void *ret=0;
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | CYCLIC *p;
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| d2361e | 2003-06-30 | Martin Stjernholm | | h=PTR_TO_INT(id);
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | h*=33;
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| d2361e | 2003-06-30 | Martin Stjernholm | | h|=PTR_TO_INT(a);
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | h*=33;
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| d2361e | 2003-06-30 | Martin Stjernholm | | h|=PTR_TO_INT(b);
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | h*=33;
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| d2361e | 2003-06-30 | Martin Stjernholm | | h|=PTR_TO_INT(th);
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | h*=33;
h%=CYCLIC_HASH_SIZE;
for(p=cyclic_hash[h];p;p=p->next)
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| 14bb59 | 2000-05-06 | Fredrik Hübinette (Hubbe) | | {
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | if(a == p->a && b==p->b && id==p->id)
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| 14bb59 | 2000-05-06 | Fredrik Hübinette (Hubbe) | | {
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| 3b6bff | 2002-12-01 | Martin Stjernholm | | #ifdef CYCLIC_DEBUG
fprintf (stderr, "%s: BEGIN_CYCLIC a=%p b=%p: found cycle\n", id, a, b);
#endif
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| 14bb59 | 2000-05-06 | Fredrik Hübinette (Hubbe) | | ret=p->ret;
break;
}
}
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | |
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| c7241b | 2000-08-10 | Henrik Grubbström (Grubba) | | c->ret=(void *)(ptrdiff_t)1;
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | c->a=a;
c->b=b;
c->id=id;
c->th=th;
c->next=cyclic_hash[h];
cyclic_hash[h]=c;
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| 545ca8 | 1997-10-07 | Fredrik Hübinette (Hubbe) | | SET_ONERROR(c->onerr, low_unlink_cyclic, c);
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| 3b6bff | 2002-12-01 | Martin Stjernholm | | #ifdef CYCLIC_DEBUG
if (!ret) fprintf (stderr, "%s: BEGIN_CYCLIC a=%p b=%p: no cycle\n", id, a, b);
#endif
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| 14bb59 | 2000-05-06 | Fredrik Hübinette (Hubbe) | | return ret;
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| fc3345 | 1997-10-02 | Fredrik Hübinette (Hubbe) | | }
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