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Eliminated last direct pointers from piers.

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This commit is contained in:
C. Guy Yarvin 2015-05-18 10:07:42 -07:00
parent 2b861da97c
commit 8caac67e05
5 changed files with 27 additions and 28 deletions
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8
i/n/a.h
View File

@ -98,11 +98,9 @@
/* u3a_road: contiguous allocation and execution context.
*/
typedef struct _u3a_road {
struct _u3a_road* par_u; // parent road
struct _u3a_road* kid_u; // child road list
struct _u3a_road* nex_u; // sibling road
struct _u3a_road* now_u; // current road pointer
u3p(struct _u3a_road) par_p; // parent road
u3p(struct _u3a_road) kid_p; // child road list
u3p(struct _u3a_road) nex_p; // sibling road
u3p(c3_w) cap_p; // top of transient region
u3p(c3_w) hat_p; // top of durable region

1
i/n/u.h
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@ -104,5 +104,6 @@
/* u3to(), u3of(): offset/pointer conversion.
*/
# define u3to(type, x) ((type *) u3a_into(x))
# define u3tn(type, x) (x == 0) ? (void *)0 : ((type *) u3a_into(x))
# define u3of(type, x) (u3a_outa((type *)x))

4
n/j.c
View File

@ -209,8 +209,8 @@ u3j_find(u3_noun bat)
return jaw;
}
if ( rod_u->par_u ) {
rod_u = rod_u->par_u;
if ( rod_u->par_p ) {
rod_u = u3to(u3_road, rod_u->par_p);
}
else return u3_none;
}

36
n/m.c
View File

@ -149,7 +149,7 @@ _cm_signal_handle_term(int x)
{
// Ignore if we are using base memory from work memory, very rare.
//
if ( (0 != u3H->rod_u.kid_u) && (&(u3H->rod_u) == u3R) ) {
if ( (0 != u3H->rod_u.kid_p) && (&(u3H->rod_u) == u3R) ) {
_cm_emergency("ignored", c3__term);
}
else {
@ -184,7 +184,7 @@ _cm_signal_reset(void)
u3R = &u3H->rod_u;
u3R->cap_p = u3R->mat_p;
u3R->ear_p = 0;
u3R->kid_u = 0;
u3R->kid_p = 0;
}
/* _cm_stack_recover(): recover stack trace, with lacunae.
@ -276,13 +276,13 @@ _cm_signal_recover(c3_l sig_l, u3_noun arg)
u3R = &(u3H->rod_u);
rod_u = u3R;
while ( rod_u->kid_u ) {
while ( rod_u->kid_p ) {
#if 0
fprintf(stderr, "collecting %d frames\r\n",
u3kb_lent(rod_u->kid_u->bug.tax));
u3kb_lent((u3to(u3_road, rod_u->kid_p)->bug.tax));
#endif
tax = u3kb_weld(_cm_stack_recover(rod_u->kid_u), tax);
rod_u = rod_u->kid_u;
tax = u3kb_weld(_cm_stack_recover(u3to(u3_road, rod_u->kid_p)), tax);
rod_u = u3to(u3_road, rod_u->kid_p);
}
}
@ -712,9 +712,9 @@ u3m_leap(c3_w pad_w)
/* Attach the new road to its parents.
*/
{
c3_assert(0 == u3R->kid_u);
rod_u->par_u = u3R;
u3R->kid_u = rod_u;
c3_assert(0 == u3R->kid_p);
rod_u->par_p = u3of(u3_road, u3R);
u3R->kid_p = u3of(u3_road, rod_u);
}
/* Set up the new road.
@ -730,26 +730,26 @@ u3m_leap(c3_w pad_w)
void
u3m_fall()
{
c3_assert(0 != u3R->par_u);
c3_assert(0 != u3R->par_p);
#if 0
fprintf(stderr, "fall: from %s %p, to %s %p (cap %p, was %p)\r\n",
_(u3a_is_north(u3R)) ? "north" : "south",
u3R,
_(u3a_is_north(u3R)) ? "north" : "south",
u3R->par_u,
u3to(u3_road, u3R->par_p),
u3R->hat_w,
u3R->rut_w);
#endif
/* The new cap is the old hat - it's as simple as that.
*/
u3R->par_u->cap_p = u3R->hat_p;
u3to(u3_road, u3R->par_p)->cap_p = u3R->hat_p;
/* And, we're back home.
*/
u3R = u3R->par_u;
u3R->kid_u = 0;
u3R = u3to(u3_road, u3R->par_p);
u3R->kid_p = 0;
}
/* u3m_hate(): new, integrated leap mechanism (enter).
@ -951,8 +951,8 @@ u3m_soft_run(u3_noun fly,
/* Configure the new road.
*/
{
u3R->ski.flu = u3nc(fly, u3R->par_u->ski.flu);
u3R->pro.don = u3R->par_u->pro.don;
u3R->ski.flu = u3nc(fly, u3to(u3_road, u3R->par_p)->ski.flu);
u3R->pro.don = u3to(u3_road, u3R->par_p)->pro.don;
u3R->bug.tax = 0;
}
u3t_on(coy_o);
@ -1039,8 +1039,8 @@ u3m_soft_esc(u3_noun sam)
/* Configure the new road.
*/
{
u3R->ski.flu = u3t(u3R->par_u->ski.flu);
u3R->pro.don = u3R->par_u->pro.don;
u3R->ski.flu = u3t(u3to(u3_road, u3R->par_p)->ski.flu);
u3R->pro.don = u3to(u3_road, u3R->par_p)->pro.don;
u3R->bug.tax = 0;
}

6
n/t.c
View File

@ -113,8 +113,8 @@ _t_jet_label(u3a_road* rod_u, u3_noun bat)
return u3h(u3t(u3t(u3h(cax))));
}
if ( rod_u->par_u ) {
rod_u = rod_u->par_u;
if ( rod_u->par_p ) {
rod_u = u3to(u3_road, rod_u->par_p);
}
else return u3_none;
}
@ -175,7 +175,7 @@ _t_samp_process(u3_road* rod_u)
}
don = u3t(don);
}
rod_u = rod_u->par_u;
rod_u = u3tn(u3_road, rod_u->par_p);
}
u3z(muf);