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* dynwind.c: changed the wind-guards representation to double

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This commit is contained in:
Mikael Djurfeldt 2000-03-14 06:39:44 +00:00
parent 7cf1a27e9c
commit bd47429edb
1 changed files with 8 additions and 27 deletions
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35
libguile/dynwind.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1995, 1996, 1998, 1999 Free Software Foundation, Inc.
/* Copyright (C) 1995, 1996, 1998, 1999, 2000 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -135,27 +135,13 @@ SCM_DEFINE (scm_dynamic_wind, "dynamic-wind", 3, 0, 0,
* smob. Objects of this type are pushed onto the dynwind chain.
*/
typedef struct guardsmem {
scm_guard_t before;
scm_guard_t after;
void *data;
} guardsmem;
#define SCM_GUARDSMEM(obj) ((guardsmem *) SCM_CDR (obj))
#define SCM_BEFORE_GUARD(obj) (SCM_GUARDSMEM (obj)->before)
#define SCM_AFTER_GUARD(obj) (SCM_GUARDSMEM (obj)->after)
#define SCM_GUARD_DATA(obj) (SCM_GUARDSMEM (obj)->data)
#define SCM_GUARDSP(obj) (SCM_NIMP(obj) && (SCM_UNPACK_CAR (obj) == tc16_guards))
#define SCM_GUARDSP(obj) SCM_SMOB_PREDICATE (tc16_guards, obj)
#define SCM_BEFORE_GUARD(obj) ((scm_guard_t) SCM_CELL_WORD (obj, 1))
#define SCM_AFTER_GUARD(obj) ((scm_guard_t) SCM_CELL_WORD (obj, 2))
#define SCM_GUARD_DATA(obj) ((void *) SCM_CELL_WORD (obj, 3))
static long tc16_guards;
static scm_sizet
freeguards (SCM guards)
{
scm_must_free ((char *) SCM_CDR (guards));
return sizeof (guardsmem);
}
static int
printguards (SCM exp, SCM port, scm_print_state *pstate)
{
@ -173,13 +159,8 @@ scm_internal_dynamic_wind (scm_guard_t before,
void *guard_data)
{
SCM guards, ans;
guardsmem *g;
before (guard_data);
g = (guardsmem *) scm_must_malloc (sizeof (*g), "guards");
g->before = before;
g->after = after;
g->data = guard_data;
SCM_NEWSMOB (guards, tc16_guards, g);
SCM_NEWSMOB3 (guards, tc16_guards, before, after, guard_data);
scm_dynwinds = scm_acons (guards, SCM_BOOL_F, scm_dynwinds);
ans = inner (inner_data);
scm_dynwinds = SCM_CDR (scm_dynwinds);
@ -288,7 +269,7 @@ scm_dowinds (SCM to, long delta)
void
scm_init_dynwind ()
{
tc16_guards = scm_make_smob_type_mfpe ("guards", sizeof (struct guardsmem),
NULL, freeguards, printguards, NULL);
tc16_guards = scm_make_smob_type_mfpe ("guards", 0,
NULL, scm_free0, printguards, NULL);
#include "dynwind.x"
}