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shrub/noun/allocate.c
Fredrik Ekholdt 6fb07df84c Fixes #735: misleading indent on gcc 6
2016-06-02 09:05:43 +02:00

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/* g/a.c
**
*/
#include "all.h"
/* _box_count(): adjust memory count.
*/
#ifdef U3_MEMORY_DEBUG
static void
_box_count(c3_ws siz_ws)
{
u3R->all.fre_w += siz_ws;
{
c3_w end_w = _(u3a_is_north(u3R))
? (u3R->hat_p - u3R->rut_p)
: (u3R->rut_p - u3R->hat_p);
c3_w all_w = (end_w - u3R->all.fre_w);
if ( all_w > u3R->all.max_w ) {
u3R->all.max_w = all_w;
}
}
}
#else
static void
_box_count(c3_ws siz_ws) { u3R->all.fre_w += siz_ws; }
#endif
/* _box_slot(): select the right free list to search for a block.
*/
c3_w
_box_slot(c3_w siz_w)
{
if ( siz_w < 8 ) {
return 0;
}
else {
c3_w i_w = 1;
while ( 1 ) {
if ( i_w == u3a_fbox_no ) {
return (i_w - 1);
}
if ( siz_w < 16 ) {
return i_w;
}
siz_w = (siz_w + 1) >> 1;
i_w += 1;
}
}
}
/* _box_make(): construct a box.
*/
u3a_box*
_box_make(void* box_v, c3_w siz_w, c3_w use_w)
{
u3a_box* box_u = box_v;
c3_w* box_w = box_v;
c3_assert(siz_w >= u3a_minimum);
box_w[0] = siz_w;
box_w[siz_w - 1] = siz_w;
box_u->use_w = use_w;
c3_assert(2 != use_w);
# ifdef U3_MEMORY_DEBUG
box_u->cod_w = u3_Code;
box_u->eus_w = 0;
# endif
return box_u;
}
/* _box_attach(): attach a box to the free list.
*/
void
_box_attach(u3a_box* box_u)
{
c3_assert(box_u->siz_w >= (1 + c3_wiseof(u3a_fbox)));
c3_assert(0 != u3of(u3a_fbox, box_u));
#if 0
// For debugging, fill the box with beef.
{
c3_w* box_w = (void *)box_u;
c3_w i_w;
for ( i_w = c3_wiseof(u3a_box); (i_w + 1) < box_u->siz_w; i_w++ ) {
box_w[i_w] = 0xdeadbeef;
}
}
#endif
_box_count(box_u->siz_w);
{
c3_w sel_w = _box_slot(box_u->siz_w);
u3p(u3a_fbox) fre_p = u3of(u3a_fbox, box_u);
u3p(u3a_fbox)* pfr_p = &u3R->all.fre_p[sel_w];
u3p(u3a_fbox) nex_p = *pfr_p;
u3to(u3a_fbox, fre_p)->pre_p = 0;
u3to(u3a_fbox, fre_p)->nex_p = nex_p;
if ( u3to(u3a_fbox, fre_p)->nex_p ) {
u3to(u3a_fbox, u3to(u3a_fbox, fre_p)->nex_p)->pre_p = fre_p;
}
(*pfr_p) = fre_p;
}
}
/* _box_detach(): detach a box from the free list.
*/
void
_box_detach(u3a_box* box_u)
{
u3p(u3a_fbox) fre_p = u3of(u3a_fbox, box_u);
u3p(u3a_fbox) pre_p = u3to(u3a_fbox, fre_p)->pre_p;
u3p(u3a_fbox) nex_p = u3to(u3a_fbox, fre_p)->nex_p;
_box_count(-(box_u->siz_w));
if ( nex_p ) {
c3_assert(u3to(u3a_fbox, nex_p)->pre_p == fre_p);
u3to(u3a_fbox, nex_p)->pre_p = pre_p;
}
if ( pre_p ) {
c3_assert(u3to(u3a_fbox, pre_p)->nex_p == fre_p);
u3to(u3a_fbox, pre_p)->nex_p = nex_p;
}
else {
c3_w sel_w = _box_slot(box_u->siz_w);
c3_assert(fre_p == u3R->all.fre_p[sel_w]);
u3R->all.fre_p[sel_w] = nex_p;
}
}
/* _me_align_pad(): pad to first point after pos_p aligned at (ald_w, alp_w).
*/
static __inline__ c3_w
_me_align_pad(u3_post pos_p, c3_w ald_w, c3_w alp_w)
{
c3_w adj_w = (ald_w - (alp_w + 1));
c3_p off_p = (pos_p + adj_w);
c3_p orp_p = off_p &~ (ald_w - 1);
c3_p fin_p = orp_p + alp_w;
c3_w pad_w = (fin_p - pos_p);
return pad_w;
}
/* _me_align_dap(): pad to last point before pos_p aligned at (ald_w, alp_w).
*/
static __inline__ c3_w
_me_align_dap(u3_post pos_p, c3_w ald_w, c3_w alp_w)
{
c3_w adj_w = alp_w;
c3_p off_p = (pos_p - adj_w);
c3_p orp_p = (off_p &~ (ald_w - 1));
c3_p fin_p = orp_p + alp_w;
c3_w pad_w = (pos_p - fin_p);
return pad_w;
}
/* _ca_box_make_hat(): in u3R, allocate directly on the hat.
*/
static u3a_box*
_ca_box_make_hat(c3_w len_w, c3_w ald_w, c3_w alp_w, c3_w use_w)
{
c3_w pad_w;
u3_post all_p;
if ( c3y == u3a_is_north(u3R) ) {
all_p = u3R->hat_p;
pad_w = _me_align_pad(all_p, ald_w, alp_w);
u3R->hat_p += (len_w + pad_w);
if ( u3R->hat_p >= u3R->cap_p ) {
u3m_bail(c3__meme); return 0;
}
}
else {
all_p = (u3R->hat_p - len_w);
pad_w = _me_align_dap(all_p, ald_w, alp_w);
all_p -= pad_w;
u3R->hat_p = all_p;
if ( u3R->hat_p <= u3R->cap_p ) {
u3m_bail(c3__meme); return 0;
}
}
return _box_make(u3a_into(all_p), (len_w + pad_w), use_w);
}
#if 0
/* _me_road_all_hat(): in u3R, allocate directly on the hat.
*/
static u3a_box*
_ca_box_make_hat(c3_w len_w, c3_w alm_w, c3_w use_w)
{
return _box_make(_me_road_all_hat(len_w), len_w, use_w);
}
#endif
#if 0 // not yet used
/* _me_road_all_cap(): in u3R, allocate directly on the cap.
*/
static c3_w*
_me_road_all_cap(c3_w len_w)
{
if ( len_w > u3a_open(u3R) ) {
u3m_bail(c3__meme); return 0;
}
if ( c3y == u3a_is_north(u3R) ) {
u3R->cap_p -= len_w;
return u3a_into(u3R->cap_p);
}
else {
u3_post all_p;
all_p = u3R->cap_p;
u3R->cap_p += len_w;
return u3a_into(all_p);
}
}
#endif
#if 0
/* u3a_sane(): check allocator sanity.
*/
void
u3a_sane(void)
{
c3_w i_w;
for ( i_w = 0; i_w < u3a_fbox_no; i_w++ ) {
u3a_fbox* fre_u = u3R->all.fre_u[i_w];
while ( fre_u ) {
if ( fre_u == u3R->all.fre_u[i_w] ) {
c3_assert(fre_u->pre_u == 0);
}
else {
c3_assert(fre_u->pre_u != 0);
c3_assert(fre_u->pre_u->nex_u == fre_u);
if ( fre_u->nex_u != 0 ) {
c3_assert(fre_u->nex_u->pre_u == fre_u);
}
}
fre_u = fre_u->nex_u;
}
}
}
#endif
/* _ca_willoc(): u3a_walloc() internals.
*/
static void*
_ca_willoc(c3_w len_w, c3_w ald_w, c3_w alp_w)
{
c3_w siz_w = c3_max(u3a_minimum, u3a_boxed(len_w));
c3_w sel_w = _box_slot(siz_w);
alp_w = (alp_w + c3_wiseof(u3a_box)) % ald_w;
// XX: this logic is totally bizarre, but preserve it.
//
if ( (sel_w != 0) && (sel_w != u3a_fbox_no - 1) ) {
sel_w += 1;
}
// fprintf(stderr, "walloc %d: *pfr_p %x\n", len_w, u3R->all.fre_p[sel_w]);
while ( 1 ) {
u3p(u3a_fbox) *pfr_p = &u3R->all.fre_p[sel_w];
while ( 1 ) {
if ( 0 == *pfr_p ) {
if ( sel_w < (u3a_fbox_no - 1) ) {
sel_w += 1;
break;
}
else {
/* Nothing in top free list. Chip away at the hat.
*/
return u3a_boxto(_ca_box_make_hat(siz_w, ald_w, alp_w, 1));
}
}
else {
c3_w pad_w = _me_align_pad(*pfr_p, ald_w, alp_w);
if ( 1 == ald_w ) c3_assert(0 == pad_w);
if ( (siz_w + pad_w) > u3to(u3a_fbox, *pfr_p)->box_u.siz_w ) {
/* This free block is too small. Continue searching.
*/
pfr_p = &(u3to(u3a_fbox, *pfr_p)->nex_p);
continue;
}
else {
u3a_box* box_u = &(u3to(u3a_fbox, *pfr_p)->box_u);
/* We have found a free block of adequate size. Remove it
** from the free list.
*/
siz_w += pad_w;
#ifdef U3_MEMORY_DEBUG
_box_count(-(box_u->siz_w)); /* XX should this be ifdefed? */
#endif
{
{
c3_assert((0 == u3to(u3a_fbox, *pfr_p)->pre_p) ||
(u3to(u3a_fbox, u3to(u3a_fbox, *pfr_p)->pre_p)->nex_p
== (*pfr_p)));
c3_assert((0 == u3to(u3a_fbox, *pfr_p)->nex_p) ||
(u3to(u3a_fbox, u3to(u3a_fbox, *pfr_p)->nex_p)->pre_p
== (*pfr_p)));
}
if ( 0 != u3to(u3a_fbox, *pfr_p)->nex_p ) {
u3to(u3a_fbox, u3to(u3a_fbox, *pfr_p)->nex_p)->pre_p =
u3to(u3a_fbox, *pfr_p)->pre_p;
}
*pfr_p = u3to(u3a_fbox, *pfr_p)->nex_p;
}
/* If we can chop off another block, do it.
*/
if ( (siz_w + u3a_minimum) <= box_u->siz_w ) {
/* Split the block.
*/
c3_w* box_w = ((c3_w *)(void *)box_u);
c3_w* end_w = box_w + siz_w;
c3_w lef_w = (box_u->siz_w - siz_w);
_box_attach(_box_make(end_w, lef_w, 0));
return u3a_boxto(_box_make(box_w, siz_w, 1));
}
else {
c3_assert(0 == box_u->use_w);
box_u->use_w = 1;
#ifdef U3_MEMORY_DEBUG
box_u->cod_w = u3_Code;
#endif
return u3a_boxto(box_u);
}
}
}
}
}
}
/* _ca_walloc(): u3a_walloc() internals.
*/
static void*
_ca_walloc(c3_w len_w, c3_w ald_w, c3_w alp_w)
{
void* ptr_v;
u3t_on(mal_o);
ptr_v = _ca_willoc(len_w, ald_w, alp_w);
u3t_off(mal_o);
#if 0
if ( SUB ) {
fprintf(stderr, "sub: at %p; kid %p\r\n",
ptr_v,
u3R->kid_u);
fprintf(stderr, "this: hat %p, cap %p, rut %p, mat %p\r\n",
u3a_into(u3R->hat_p),
u3a_into(u3R->cap_p),
u3a_into(u3R->rut_p),
u3a_into(u3R->mat_p));
if ( u3R->kid_u ) {
fprintf(stderr, "kids: hat %p, cap %p, rut %p, mat %p\r\n\n",
u3a_into(u3R->kid_u->hat_p),
u3a_into(u3R->kid_u->cap_p),
u3a_into(u3R->kid_u->rut_p),
u3a_into(u3R->kid_u->mat_p));
}
}
#endif
#if 0
if ( u3a_botox(ptr_v) == (u3a_box*)(void *)0x27f50a02c ) {
static int xuc_i;
printf("xuc_i %d\r\n", xuc_i);
// if ( 2 == xuc_i ) { abort(); }
xuc_i++;
}
#endif
return ptr_v;
}
/* u3a_walloc(): allocate storage words on hat.
*/
void*
u3a_walloc(c3_w len_w)
{
void* ptr_v;
ptr_v = _ca_walloc(len_w, 1, 0);
#if 0
if ( (703 == u3_Code) &&
u3a_botox(ptr_v) == (u3a_box*)(void *)0x200dfe3e4 ) {
static int xuc_i;
printf("xuc_i %d\r\n", xuc_i);
if ( 1 == xuc_i ) {
u3a_box* box_u = u3a_botox(ptr_v);
box_u->cod_w = 999;
}
xuc_i++;
}
#endif
return ptr_v;
}
/* u3a_wealloc(): realloc in words.
*/
void*
u3a_wealloc(void* lag_v, c3_w len_w)
{
if ( !lag_v ) {
return u3a_malloc(len_w);
}
else {
u3a_box* box_u = u3a_botox(lag_v);
c3_w* old_w = lag_v;
c3_w tiz_w = c3_min(box_u->siz_w, len_w);
{
c3_w* new_w = u3a_walloc(len_w);
c3_w i_w;
for ( i_w = 0; i_w < tiz_w; i_w++ ) {
new_w[i_w] = old_w[i_w];
}
u3a_wfree(lag_v);
return new_w;
}
}
}
/* u3a_wfree(): free storage.
*/
void
u3a_wfree(void* tox_v)
{
u3a_box* box_u = u3a_botox(tox_v);
c3_w* box_w = (c3_w *)(void *)box_u;
u3t_on(mal_o);
c3_assert(box_u->use_w != 0);
box_u->use_w -= 1;
if ( 0 != box_u->use_w ) {
u3t_off(mal_o);
return;
}
#if 0
/* Clear the contents of the block, for debugging.
*/
{
c3_w i_w;
for ( i_w = c3_wiseof(u3a_box); (i_w + 1) < box_u->siz_w; i_w++ ) {
box_w[i_w] = 0xdeadbeef;
}
}
#endif
if ( c3y == u3a_is_north(u3R) ) {
/* Try to coalesce with the block below.
*/
if ( box_w != u3a_into(u3R->rut_p) ) {
c3_w laz_w = *(box_w - 1);
u3a_box* pox_u = (u3a_box*)(void *)(box_w - laz_w);
if ( 0 == pox_u->use_w ) {
_box_detach(pox_u);
_box_make(pox_u, (laz_w + box_u->siz_w), 0);
box_u = pox_u;
box_w = (c3_w*)(void *)pox_u;
}
}
/* Try to coalesce with the block above, or the wilderness.
*/
if ( (box_w + box_u->siz_w) == u3a_into(u3R->hat_p) ) {
u3R->hat_p = u3a_outa(box_w);
}
else {
u3a_box* nox_u = (u3a_box*)(void *)(box_w + box_u->siz_w);
if ( 0 == nox_u->use_w ) {
_box_detach(nox_u);
_box_make(box_u, (box_u->siz_w + nox_u->siz_w), 0);
}
_box_attach(box_u);
}
}
else {
/* Try to coalesce with the block above.
*/
if ( (box_w + box_u->siz_w) != u3a_into(u3R->rut_p) ) {
u3a_box* nox_u = (u3a_box*)(void *)(box_w + box_u->siz_w);
if ( 0 == nox_u->use_w ) {
_box_detach(nox_u);
_box_make(box_u, (box_u->siz_w + nox_u->siz_w), 0);
}
}
/* Try to coalesce with the block below, or with the wilderness.
*/
if ( box_w == u3a_into(u3R->hat_p) ) {
u3R->hat_p = u3a_outa(box_w + box_u->siz_w);
}
else {
c3_w laz_w = *(box_w - 1);
u3a_box* pox_u = (u3a_box*)(void *)(box_w - laz_w);
if ( 0 == pox_u->use_w ) {
_box_detach(pox_u);
_box_make(pox_u, (laz_w + box_u->siz_w), 0);
box_u = pox_u;
}
_box_attach(box_u);
}
}
u3t_off(mal_o);
}
/* u3a_calloc(): allocate and zero-initialize array
*/
void*
u3a_calloc(size_t num_i, size_t len_i)
{
size_t byt_i = num_i * len_i;
c3_w* out_w;
c3_assert(byt_i / len_i == num_i);
out_w = u3a_malloc(byt_i);
memset(out_w, 0, byt_i);
return out_w;
}
/* u3a_malloc(): aligned storage measured in bytes.
*/
void*
u3a_malloc(size_t len_i)
{
c3_w len_w = (c3_w)((len_i + 3) >> 2);
c3_w* ptr_w = _ca_walloc(len_w + 1, 4, 3);
u3_post ptr_p = u3a_outa(ptr_w);
c3_w pad_w = _me_align_pad(ptr_p, 4, 3);
c3_w* out_w = u3a_into(ptr_p + pad_w + 1);
#if 0
if ( u3a_botox(out_w) == (u3a_box*)(void *)0x3bdd1c80) {
static int xuc_i = 0;
fprintf(stderr,"xuc_i %d\r\n", xuc_i);
// if ( 1 == xuc_i ) { abort(); }
xuc_i++;
}
#endif
out_w[-1] = pad_w;
return out_w;
}
/* u3a_celloc(): allocate a cell.
*/
c3_w*
u3a_celloc(void)
{
#ifdef U3_CELLOC_TOGGLE
if ( u3C.wag_w & u3o_debug_ram ) {
return u3a_walloc(c3_wiseof(u3a_cell));
}
#endif
u3p(u3a_fbox) cel_p;
if ( (u3R == &(u3H->rod_u)) || !(cel_p = u3R->all.cel_p) ) {
return u3a_walloc(c3_wiseof(u3a_cell));
}
else {
u3a_box* box_u = &(u3to(u3a_fbox, cel_p)->box_u);
box_u->use_w = 1;
u3R->all.cel_p = u3to(u3a_fbox, cel_p)->nex_p;
return u3a_boxto(box_u);
}
}
/* u3a_cfree(): free a cell.
*/
void
u3a_cfree(c3_w* cel_w)
{
#ifdef U3_CELLOC_TOGGLE
if ( u3C.wag_w & u3o_debug_ram ) {
return u3a_wfree(cel_w);
}
#endif
if ( u3R == &(u3H->rod_u) ) {
return u3a_wfree(cel_w);
}
else {
u3a_box* box_u = u3a_botox(cel_w);
u3p(u3a_fbox) fre_p = u3of(u3a_fbox, box_u);
u3to(u3a_fbox, fre_p)->nex_p = u3R->all.cel_p;
u3R->all.cel_p = fre_p;
}
}
/* u3a_realloc(): aligned realloc in bytes.
*/
void*
u3a_realloc(void* lag_v, size_t len_i)
{
if ( !lag_v ) {
return u3a_malloc(len_i);
}
else {
c3_w len_w = (c3_w)((len_i + 3) >> 2);
c3_w* lag_w = lag_v;
c3_w pad_w = lag_w[-1];
c3_w* org_w = lag_w - (pad_w + 1);
u3a_box* box_u = u3a_botox((void *)org_w);
c3_w* old_w = lag_v;
c3_w tiz_w = c3_min(box_u->siz_w, len_w);
{
c3_w* new_w = u3a_malloc(len_i);
c3_w i_w;
for ( i_w = 0; i_w < tiz_w; i_w++ ) {
new_w[i_w] = old_w[i_w];
}
u3a_wfree(org_w);
return new_w;
}
}
c3_w len_w = (c3_w)len_i;
return u3a_wealloc(lag_v, (len_w + 3) >> 2);
}
/* u3a_realloc2(): gmp-shaped realloc.
*/
void*
u3a_realloc2(void* lag_v, size_t old_i, size_t new_i)
{
return u3a_realloc(lag_v, new_i);
}
/* u3a_free(): free for aligned malloc.
*/
void
u3a_free(void* tox_v)
{
if (NULL == tox_v)
return;
c3_w* tox_w = tox_v;
c3_w pad_w = tox_w[-1];
c3_w* org_w = tox_w - (pad_w + 1);
// printf("free %p %p\r\n", org_w, tox_w);
u3a_wfree(org_w);
}
/* u3a_free2(): gmp-shaped free.
*/
void
u3a_free2(void* tox_v, size_t siz_i)
{
return u3a_free(tox_v);
}
#if 1
/* _me_wash_north(): clean up mug slots after copy.
*/
static void _me_wash_north(u3_noun dog);
static void
_me_wash_north_in(u3_noun som)
{
if ( _(u3a_is_cat(som)) ) return;
if ( !_(u3a_north_is_junior(u3R, som)) ) return;
_me_wash_north(som);
}
static void
_me_wash_north(u3_noun dog)
{
c3_assert(c3y == u3a_is_dog(dog));
// c3_assert(c3y == u3a_north_is_junior(u3R, dog));
{
u3a_noun* dog_u = u3a_to_ptr(dog);
if ( dog_u->mug_w == 0 ) return;
dog_u->mug_w = 0; // power wash
// if ( dog_u->mug_w >> 31 ) { dog_u->mug_w = 0; }
if ( _(u3a_is_pom(dog)) ) {
u3a_cell* god_u = (u3a_cell *)(void *)dog_u;
_me_wash_north_in(god_u->hed);
_me_wash_north_in(god_u->tel);
}
}
}
/* _me_wash_south(): clean up mug slots after copy.
*/
static void _me_wash_south(u3_noun dog);
static void
_me_wash_south_in(u3_noun som)
{
if ( _(u3a_is_cat(som)) ) return;
if ( !_(u3a_south_is_junior(u3R, som)) ) return;
_me_wash_south(som);
}
static void
_me_wash_south(u3_noun dog)
{
c3_assert(c3y == u3a_is_dog(dog));
// c3_assert(c3y == u3a_south_is_junior(u3R, dog));
{
u3a_noun* dog_u = u3a_to_ptr(dog);
if ( dog_u->mug_w == 0 ) return;
dog_u->mug_w = 0; // power wash
// if ( dog_u->mug_w >> 31 ) { dog_u->mug_w = 0; }
if ( _(u3a_is_pom(dog)) ) {
u3a_cell* god_u = (u3a_cell *)(void *)dog_u;
_me_wash_south_in(god_u->hed);
_me_wash_south_in(god_u->tel);
}
}
}
/* u3a_wash(): wash all lazy mugs. RETAIN.
*/
void
u3a_wash(u3_noun som)
{
if ( _(u3a_is_cat(som)) ) {
return;
}
if ( _(u3a_is_north(u3R)) ) {
if ( _(u3a_north_is_junior(u3R, som)) ) {
_me_wash_north(som);
}
}
else {
if ( _(u3a_south_is_junior(u3R, som)) ) {
_me_wash_south(som);
}
}
}
#endif
extern u3_noun BDA, BDB;
/* _me_gain_use(): increment use count.
*/
static void
_me_gain_use(u3_noun dog)
{
c3_w* dog_w = u3a_to_ptr(dog);
u3a_box* box_u = u3a_botox(dog_w);
if ( 0x7fffffff == box_u->use_w ) {
u3m_bail(c3__fail);
}
else {
if ( box_u->use_w == 0 ) {
u3m_bail(c3__foul);
}
box_u->use_w += 1;
#ifdef U3_MEMORY_DEBUG
// if ( u3_Code && !box_u->cod_w ) { box_u->cod_w = u3_Code; }
#if 0
if ( u3r_mug(dog) == 0x15d47649 ) {
static c3_w bug_w = 0;
printf("bad %x %d %d\r\n", dog, bug_w, box_u->use_w);
if ( bug_w == 0 ) { abort(); }
bug_w++;
}
#endif
#if 0
{
static c3_w bug_w = 0;
if ( BDA == dog ) {
printf("BDA %d %d\r\n", bug_w, box_u->use_w);
// if ( bug_w == 0 ) { abort(); }
bug_w++;
}
}
#endif
#if 0
{
static c3_w bug_w = 0;
if ( FOO && u3a_botox(u3a_to_ptr(dog)) == (void *)0x200dfe3e4 ) {
u3a_box* box_u = u3a_botox(u3a_to_ptr(dog));
printf("GAIN %d %d\r\n", bug_w, box_u->use_w);
if ( bug_w == 8 ) { abort(); }
bug_w++;
}
}
#endif
#endif
}
}
/* _me_copy_north_in(): copy subjuniors on a north road.
*/
static u3_noun _me_copy_north(u3_noun);
static u3_noun
_me_copy_north_in(u3_noun som)
{
c3_assert(u3_none != som);
if ( _(u3a_is_cat(som)) ) {
return som;
}
else {
u3_noun dog = som;
if ( _(u3a_north_is_senior(u3R, dog)) ) {
return dog;
}
else if ( _(u3a_north_is_junior(u3R, dog)) ) {
return _me_copy_north(dog);
}
else {
_me_gain_use(dog);
return dog;
}
}
}
/* _me_copy_north(): copy juniors on a north road.
*/
static u3_noun
_me_copy_north(u3_noun dog)
{
c3_assert(c3y == u3a_north_is_junior(u3R, dog));
if ( !_(u3a_north_is_junior(u3R, dog)) ) {
if ( !_(u3a_north_is_senior(u3R, dog)) ) {
_me_gain_use(dog);
}
return dog;
}
else {
u3a_noun* dog_u = u3a_to_ptr(dog);
/* Borrow mug slot to record new destination.
*/
if ( dog_u->mug_w >> 31 ) {
u3_noun nov = (u3_noun) dog_u->mug_w;
c3_assert(_(u3a_north_is_normal(u3R, nov)));
_me_gain_use(nov);
return nov;
}
else {
if ( c3y == u3a_is_pom(dog) ) {
u3a_cell* old_u = u3a_to_ptr(dog);
c3_w* new_w = u3a_walloc(c3_wiseof(u3a_cell));
u3_noun new = u3a_de_twin(dog, new_w);
u3a_cell* new_u = (u3a_cell*)(void *)new_w;
new_u->mug_w = old_u->mug_w;
new_u->hed = _me_copy_north_in(old_u->hed);
new_u->tel = _me_copy_north_in(old_u->tel);
/* Borrow mug slot to record new destination.
*/
old_u->mug_w = new;
return new;
}
else {
u3a_atom* old_u = u3a_to_ptr(dog);
c3_w* new_w = u3a_walloc(old_u->len_w + c3_wiseof(u3a_atom));
u3_noun new = u3a_de_twin(dog, new_w);
u3a_atom* new_u = (u3a_atom*)(void *)new_w;
new_u->mug_w = old_u->mug_w;
new_u->len_w = old_u->len_w;
{
c3_w i_w;
for ( i_w=0; i_w < old_u->len_w; i_w++ ) {
new_u->buf_w[i_w] = old_u->buf_w[i_w];
}
}
/* Borrow mug slot to record new destination.
*/
old_u->mug_w = new;
return new;
}
}
}
}
/* _me_copy_south_in(): copy subjuniors on a south road.
*/
static u3_noun _me_copy_south(u3_noun);
static u3_noun
_me_copy_south_in(u3_noun som)
{
c3_assert(u3_none != som);
if ( _(u3a_is_cat(som)) ) {
return som;
}
else {
u3_noun dog = som;
if ( _(u3a_south_is_senior(u3R, dog)) ) {
return dog;
}
else if ( _(u3a_south_is_junior(u3R, dog)) ) {
return _me_copy_south(dog);
}
else {
_me_gain_use(dog);
return dog;
}
}
}
/* _me_copy_south(): copy juniors on a south road.
*/
static u3_noun
_me_copy_south(u3_noun dog)
{
c3_assert(c3y == u3a_south_is_junior(u3R, dog));
if ( !_(u3a_south_is_junior(u3R, dog)) ) {
if ( !_(u3a_south_is_senior(u3R, dog)) ) {
_me_gain_use(dog);
}
return dog;
}
else {
u3a_noun* dog_u = u3a_to_ptr(dog);
/* Borrow mug slot to record new destination.
*/
if ( dog_u->mug_w >> 31 ) {
u3_noun nov = (u3_noun) dog_u->mug_w;
// printf("south: %p is already %p\r\n", dog_u, u3a_to_ptr(nov));
c3_assert(_(u3a_south_is_normal(u3R, nov)));
_me_gain_use(nov);
return nov;
}
else {
if ( c3y == u3a_is_pom(dog) ) {
u3a_cell* old_u = u3a_to_ptr(dog);
c3_w* new_w = u3a_walloc(c3_wiseof(u3a_cell));
u3_noun new = u3a_de_twin(dog, new_w);
u3a_cell* new_u = (u3a_cell*)(void *)new_w;
// printf("south: cell %p to %p\r\n", old_u, new_u);
#if 0
if ( old_u->mug_w == 0x730e66cc ) {
fprintf(stderr, "BAD: take %p\r\n", new_u);
}
#endif
new_u->mug_w = old_u->mug_w;
// new_u->mug_w = 0;
new_u->hed = _me_copy_south_in(old_u->hed);
new_u->tel = _me_copy_south_in(old_u->tel);
/* Borrow mug slot to record new destination.
*/
old_u->mug_w = new;
return new;
}
else {
u3a_atom* old_u = u3a_to_ptr(dog);
c3_w* new_w = u3a_walloc(old_u->len_w + c3_wiseof(u3a_atom));
u3_noun new = u3a_de_twin(dog, new_w);
u3a_atom* new_u = (u3a_atom*)(void *)new_w;
// printf("south: atom %p to %p\r\n", old_u, new_u);
new_u->mug_w = old_u->mug_w;
// new_u->mug_w = 0;
new_u->len_w = old_u->len_w;
{
c3_w i_w;
for ( i_w=0; i_w < old_u->len_w; i_w++ ) {
new_u->buf_w[i_w] = old_u->buf_w[i_w];
}
}
/* Borrow mug slot to record new destination.
*/
old_u->mug_w = new;
return new;
}
}
}
}
/* _me_take_north(): take on a north road.
*/
static u3_noun
_me_take_north(u3_noun dog)
{
if ( c3y == u3a_north_is_senior(u3R, dog) ) {
/* senior pointers are not refcounted
*/
return dog;
}
else if ( c3y == u3a_north_is_junior(u3R, dog) ) {
/* junior pointers are copied
*/
u3_noun mos = _me_copy_north(dog);
// printf("north: %p to %p\r\n", u3a_to_ptr(dog), u3a_to_ptr(mos));
return mos;
}
else {
/* normal pointers are refcounted
*/
_me_gain_use(dog);
return dog;
}
}
/* _me_take_south(): take on a south road.
*/
static u3_noun
_me_take_south(u3_noun dog)
{
if ( c3y == u3a_south_is_senior(u3R, dog) ) {
/* senior pointers are not refcounted
*/
return dog;
}
else if ( c3y == u3a_south_is_junior(u3R, dog) ) {
/* junior pointers are copied
*/
u3_noun mos = _me_copy_south(dog);
// printf("south: %p to %p\r\n", u3a_to_ptr(dog), u3a_to_ptr(mos));
return mos;
}
else {
/* normal pointers are refcounted
*/
_me_gain_use(dog);
return dog;
}
}
/* u3a_take(): gain, copying juniors.
*/
u3_noun
u3a_take(u3_noun som)
{
c3_assert(u3_none != som);
if ( _(u3a_is_cat(som)) ) {
return som;
}
else {
u3t_on(coy_o);
som = _(u3a_is_north(u3R))
? _me_take_north(som)
: _me_take_south(som);
u3t_off(coy_o);
return som;
}
}
/* u3a_left(): true of junior if preserved.
*/
c3_o
u3a_left(u3_noun som)
{
if ( _(u3a_is_cat(som)) ||
!_(u3a_is_junior(u3R, som)) )
{
return c3y;
}
else {
u3a_noun* dog_u = u3a_to_ptr(som);
return __(0 != (dog_u->mug_w >> 31));
}
}
/* _me_gain_north(): gain on a north road.
*/
static u3_noun
_me_gain_north(u3_noun dog)
{
if ( c3y == u3a_north_is_senior(u3R, dog) ) {
/* senior pointers are not refcounted
*/
return dog;
}
else {
/* junior nouns are disallowed
*/
c3_assert(!_(u3a_north_is_junior(u3R, dog)));
/* normal pointers are refcounted
*/
_me_gain_use(dog);
return dog;
}
}
/* _me_gain_south(): gain on a south road.
*/
static u3_noun
_me_gain_south(u3_noun dog)
{
if ( c3y == u3a_south_is_senior(u3R, dog) ) {
/* senior pointers are not refcounted
*/
return dog;
}
else {
/* junior nouns are disallowed
*/
c3_assert(!_(u3a_south_is_junior(u3R, dog)));
/* normal nouns are refcounted
*/
_me_gain_use(dog);
return dog;
}
}
/* _me_lose_north(): lose on a north road.
*/
static void
_me_lose_north(u3_noun dog)
{
top:
if ( c3y == u3a_north_is_normal(u3R, dog) ) {
c3_w* dog_w = u3a_to_ptr(dog);
u3a_box* box_u = u3a_botox(dog_w);
if ( box_u->use_w > 1 ) {
box_u->use_w -= 1;
}
else {
if ( 0 == box_u->use_w ) {
u3m_bail(c3__foul);
}
else {
if ( _(u3a_is_pom(dog)) ) {
u3a_cell* dog_u = (void *)dog_w;
u3_noun h_dog = dog_u->hed;
u3_noun t_dog = dog_u->tel;
if ( !_(u3a_is_cat(h_dog)) ) {
_me_lose_north(h_dog);
}
u3a_cfree(dog_w);
if ( !_(u3a_is_cat(t_dog)) ) {
dog = t_dog;
goto top;
}
}
else {
u3a_wfree(dog_w);
}
}
}
}
}
/* _me_lose_south(): lose on a south road.
*/
static void
_me_lose_south(u3_noun dog)
{
top:
if ( c3y == u3a_south_is_normal(u3R, dog) ) {
c3_w* dog_w = u3a_to_ptr(dog);
u3a_box* box_u = u3a_botox(dog_w);
if ( box_u->use_w > 1 ) {
box_u->use_w -= 1;
}
else {
if ( 0 == box_u->use_w ) {
u3m_bail(c3__foul);
}
else {
if ( _(u3a_is_pom(dog)) ) {
u3a_cell* dog_u = (void *)dog_w;
u3_noun h_dog = dog_u->hed;
u3_noun t_dog = dog_u->tel;
if ( !_(u3a_is_cat(h_dog)) ) {
_me_lose_south(h_dog);
}
u3a_cfree(dog_w);
if ( !_(u3a_is_cat(t_dog)) ) {
dog = t_dog;
goto top;
}
}
else {
u3a_wfree(dog_w);
}
}
}
}
}
/* u3a_gain(): gain a reference count in normal space.
*/
u3_noun
u3a_gain(u3_noun som)
{
// u3t_on(mal_o);
c3_assert(u3_none != som);
if ( !_(u3a_is_cat(som)) ) {
som = _(u3a_is_north(u3R))
? _me_gain_north(som)
: _me_gain_south(som);
}
// u3t_off(mal_o);
return som;
}
/* u3a_lose(): lose a reference count.
*/
void
u3a_lose(u3_noun som)
{
// u3t_on(mal_o);
if ( !_(u3a_is_cat(som)) ) {
if ( _(u3a_is_north(u3R)) ) {
_me_lose_north(som);
} else {
_me_lose_south(som);
}
}
// u3t_off(mal_o);
}
/* u3a_use(): reference count.
*/
c3_w
u3a_use(u3_noun som)
{
if ( _(u3a_is_cat(som)) ) {
return 1;
}
else {
c3_w* dog_w = u3a_to_ptr(som);
u3a_box* box_u = u3a_botox(dog_w);
return box_u->use_w;
}
}
/* u3a_luse(): check refcount sanity.
*/
void
u3a_luse(u3_noun som)
{
if ( 0 == u3a_use(som) ) {
fprintf(stderr, "luse: insane %d 0x%x\r\n", som, som);
abort();
}
if ( _(u3du(som)) ) {
u3a_luse(u3h(som));
u3a_luse(u3t(som));
}
}
/* u3a_mark_ptr(): mark a pointer for gc. Produce size if first mark.
*/
c3_w
u3a_mark_ptr(void* ptr_v)
{
if ( _(u3a_is_north(u3R)) ) {
if ( !((ptr_v >= u3a_into(u3R->rut_p)) &&
(ptr_v < u3a_into(u3R->hat_p))) )
{
return 0;
}
}
else {
if ( !((ptr_v >= u3a_into(u3R->hat_p)) &&
(ptr_v < u3a_into(u3R->rut_p))) )
{
return 0;
}
}
{
u3a_box* box_u = u3a_botox(ptr_v);
c3_w siz_w;
#ifdef U3_MEMORY_DEBUG
if ( 0 == box_u->eus_w ) {
siz_w = box_u->siz_w;
}
else if ( 0xffffffff == box_u->eus_w ) { // see _raft_prof()
siz_w = 0xffffffff;
box_u->eus_w = 0;
}
else {
siz_w = 0;
}
box_u->eus_w += 1;
#else
c3_ws use_ws = (c3_ws)box_u->use_w;
if ( use_ws == 0 ) {
fprintf(stderr, "%p is bogus\r\n", ptr_v);
siz_w = 0;
}
else {
c3_assert(use_ws != 0);
if ( 0x80000000 == (c3_w)use_ws ) { // see _raft_prof()
use_ws = -1;
siz_w = 0xffffffff;
}
else if ( use_ws < 0 ) {
use_ws -= 1;
siz_w = 0;
}
else {
use_ws = -1;
siz_w = box_u->siz_w;
}
box_u->use_w = (c3_w)use_ws;
}
#endif
return siz_w;
}
}
/* u3a_mark_mptr(): mark a malloc-allocated ptr for gc.
*/
c3_w
u3a_mark_mptr(void* ptr_v)
{
c3_w* ptr_w = ptr_v;
c3_w pad_w = ptr_w[-1];
c3_w* org_w = ptr_w - (pad_w + 1);
// printf("free %p %p\r\n", org_w, ptr_w);
return u3a_mark_ptr(org_w);
}
/* u3a_mark_noun(): mark a noun for gc. Produce size.
*/
c3_w
u3a_mark_noun(u3_noun som)
{
c3_w siz_w = 0;
while ( 1 ) {
if ( _(u3a_is_senior(u3R, som)) ) {
return siz_w;
}
else {
c3_w* dog_w = u3a_to_ptr(som);
c3_w new_w = u3a_mark_ptr(dog_w);
if ( 0 == new_w || 0xffffffff == new_w ) { // see u3a_mark_ptr()
return siz_w;
}
else {
siz_w += new_w;
if ( _(u3du(som)) ) {
siz_w += u3a_mark_noun(u3h(som));
som = u3t(som);
}
else return siz_w;
}
}
}
}
/* u3a_print_memory: print memory amount.
*/
void
u3a_print_memory(c3_c* cap_c, c3_w wor_w)
{
c3_w byt_w = (wor_w * 4);
c3_w gib_w = (byt_w / 1000000000);
c3_w mib_w = (byt_w % 1000000000) / 1000000;
c3_w kib_w = (byt_w % 1000000) / 1000;
c3_w bib_w = (byt_w % 1000);
if ( byt_w ) {
if ( gib_w ) {
fprintf(stderr, "%s: GB/%d.%03d.%03d.%03d\r\n",
cap_c, gib_w, mib_w, kib_w, bib_w);
}
else if ( mib_w ) {
fprintf(stderr, "%s: MB/%d.%03d.%03d\r\n", cap_c, mib_w, kib_w, bib_w);
}
else if ( kib_w ) {
fprintf(stderr, "%s: KB/%d.%03d\r\n", cap_c, kib_w, bib_w);
}
else if ( bib_w ) {
fprintf(stderr, "%s: B/%d\r\n", cap_c, bib_w);
}
}
}
/* u3a_sweep(): sweep a fully marked road.
*/
c3_w
u3a_sweep(void)
{
c3_w neg_w, pos_w, leq_w, weq_w;
#ifdef U3_MEMORY_DEBUG
c3_w tot_w, caf_w;
#endif
/* Measure allocated memory by counting the free list.
*/
{
c3_w end_w;
c3_w fre_w = 0;
c3_w i_w;
end_w = _(u3a_is_north(u3R))
? (u3R->hat_p - u3R->rut_p)
: (u3R->rut_p - u3R->hat_p);
for ( i_w = 0; i_w < u3a_fbox_no; i_w++ ) {
u3p(u3a_fbox) fre_p = u3R->all.fre_p[i_w];
while ( fre_p ) {
u3a_fbox* fre_u = u3to(u3a_fbox, fre_p);
fre_w += fre_u->box_u.siz_w;
fre_p = fre_u->nex_p;
}
}
#ifdef U3_PRINT_WATERMARK
if ( fre_w != u3R->all.fre_w ) {
fprintf(stderr, "fre discrepancy (%x): %x, %x, %x\r\n", u3R->par_p,
fre_w, u3R->all.fre_w, (u3R->all.fre_w - fre_w));
}
#endif
neg_w = (end_w - fre_w);
}
/* Sweep through the arena, repairing and counting leaks.
*/
pos_w = leq_w = weq_w = 0;
{
u3_post box_p = _(u3a_is_north(u3R)) ? u3R->rut_p : u3R->hat_p;
u3_post end_p = _(u3a_is_north(u3R)) ? u3R->hat_p : u3R->rut_p;
c3_w* box_w = u3a_into(box_p);
c3_w* end_w = u3a_into(end_p);
while ( box_w < end_w ) {
u3a_box* box_u = (void *)box_w;
#ifdef U3_MEMORY_DEBUG
/* I suspect these printfs fail hilariously in the case
* of non-direct atoms. We shouldn't unconditionally run
* u3a_to_pom(). In general, the condition
* box_u->siz_w > u3a_mimimum is sufficient, but not necessary,
* for the box to represent an atom. The atoms between
* 2^31 and 2^32 are the exceptions.
*
* Update: so, apparently u3.md is incorrect, and a pug is just
* an indirect atom. This code should be altered to handle
* that.
*/
if ( box_u->use_w != box_u->eus_w ) {
if ( box_u->eus_w != 0 ) {
if ( box_u->use_w == 0 ) {
printf("dank %p (%d, %d)\r\n", box_u, box_u->use_w, box_u->eus_w);
}
else {
printf("weak %p %x (cell) %x (%d, %d)\r\n",
box_u,
(u3_noun)u3a_to_pom(u3a_outa(u3a_boxto(box_w))),
((u3a_noun *)(u3a_boxto(box_w)))->mug_w,
box_u->use_w, box_u->eus_w);
u3a_print_memory("weak (minimum)", box_u->siz_w);
// u3m_p("weak", u3a_to_pom(u3a_outa(u3a_boxto(box_w))));
}
weq_w += box_u->siz_w;
}
else {
printf("leak %p %x (cell)/%x (%d)\r\n",
box_u,
(u3_noun)u3a_to_pom(u3a_outa(u3a_boxto(box_w))),
((u3a_noun *)(u3a_boxto(box_w)))->mug_w
? ((u3a_noun *)(u3a_boxto(box_w)))->mug_w
: u3r_mug(u3a_to_pom(u3a_outa(u3a_boxto(box_w)))),
box_u->use_w);
u3a_print_memory("leak (minimum)", box_u->siz_w);
// u3m_p("leak", u3a_to_pom(u3a_outa(u3a_boxto(box_w))));
leq_w += box_u->siz_w;
}
if ( box_u->cod_w ) {
u3m_p(" code", box_u->cod_w);
}
box_u->use_w = box_u->eus_w;
}
else {
if ( box_u->use_w ) {
pos_w += box_u->siz_w;
}
}
box_u->eus_w = 0;
#else
c3_ws use_ws = (c3_ws)box_u->use_w;
if ( use_ws > 0 ) {
printf("leak %p %x\r\n",
box_u,
((u3a_noun *)(u3a_boxto(box_w)))->mug_w
? ((u3a_noun *)(u3a_boxto(box_w)))->mug_w
: u3r_mug(u3a_to_pom(u3a_outa(u3a_boxto(box_w)))));
// u3a_print_memory("leak (minimum)", box_u->siz_w);
#if 0
/* For those times when you've really just got to crack open
* the box and see what's inside
*/
{
int i;
for ( i = 0; i < box_u->siz_w; i++ ) {
printf("%08x ", (unsigned int)(((c3_w*)box_u)[i]));
}
printf("\r\n");
}
#endif
leq_w += box_u->siz_w;
box_u->use_w = 0;
_box_attach(box_u);
}
else if ( use_ws < 0 ) {
pos_w += box_u->siz_w;
box_u->use_w = (c3_w)(0 - use_ws);
}
#endif
box_w += box_u->siz_w;
}
}
#ifdef U3_MEMORY_DEBUG
tot_w = _(u3a_is_north(u3R))
? u3R->mat_p - u3R->rut_p
: u3R->rut_p - u3R->mat_p;
caf_w = _(u3a_is_north(u3R))
? u3R->mat_p - u3R->cap_p
: u3R->cap_p - u3R->mat_p;
#ifdef U3_PRINT_WATERMARK
if ( (0 != u3R->par_p) && (u3R->all.max_w > 1000000) ) {
u3a_print_memory("available", (tot_w - pos_w));
u3a_print_memory("allocated", pos_w);
u3a_print_memory("volatile", caf_w);
u3a_print_memory("maximum", u3R->all.max_w);
}
#else
u3a_print_memory("available", (tot_w - pos_w));
u3a_print_memory("allocated", pos_w);
u3a_print_memory("volatile", caf_w);
#endif
#endif
u3a_print_memory("leaked", leq_w);
u3a_print_memory("weaked", weq_w);
c3_assert((pos_w + leq_w + weq_w) == neg_w);
if ( 0 != leq_w || (0 != weq_w) ) { c3_assert(0); }
return neg_w;
}
/* u3a_slab(): create a length-bounded proto-atom.
*/
c3_w*
u3a_slab(c3_w len_w)
{
c3_w* nov_w = u3a_walloc(len_w + c3_wiseof(u3a_atom));
u3a_atom* pug_u = (void *)nov_w;
pug_u->mug_w = 0;
pug_u->len_w = len_w;
/* Clear teh slab.
*/
{
c3_w i_w;
for ( i_w=0; i_w < len_w; i_w++ ) {
pug_u->buf_w[i_w] = 0;
}
}
return pug_u->buf_w;
}
/* u3a_slaq(): u3a_slaq() with a defined blocksize.
*/
c3_w*
u3a_slaq(c3_g met_g, c3_w len_w)
{
return u3a_slab(((len_w << met_g) + 31) >> 5);
}
/* u3a_malt(): measure and finish a proto-atom.
*/
u3_noun
u3a_malt(c3_w* sal_w)
{
c3_w* nov_w = (sal_w - c3_wiseof(u3a_atom));
u3a_atom* nov_u = (void *)nov_w;
c3_w len_w;
for ( len_w = nov_u->len_w; len_w; len_w-- ) {
if ( 0 != nov_u->buf_w[len_w - 1] ) {
break;
}
}
return u3a_mint(sal_w, len_w);
}
/* u3a_moot(): finish a pre-measured proto-atom; dangerous.
*/
u3_noun
u3a_moot(c3_w* sal_w)
{
c3_w* nov_w = (sal_w - c3_wiseof(u3a_atom));
u3a_atom* nov_u = (void*)nov_w;
c3_w len_w = nov_u->len_w;
c3_w las_w = nov_u->buf_w[len_w - 1];
c3_assert(0 != len_w);
c3_assert(0 != las_w);
if ( 1 == len_w ) {
if ( _(u3a_is_cat(las_w)) ) {
u3a_wfree(nov_w);
return las_w;
}
}
return u3a_to_pug(u3a_outa(nov_w));
}
#if 0
/* _ca_detect(): in u3a_detect().
*/
static c3_d
_ca_detect(u3p(u3h_root) har_p, u3_noun fum, u3_noun som, c3_d axe_d)
{
while ( 1 ) {
if ( som == fum ) {
return axe_d;
}
else if ( !_(u3du(fum)) || (u3_none != u3h_get(har_p, fum)) ) {
return 0;
}
else {
c3_d eax_d;
u3h_put(har_p, fum, 0);
if ( 0 != (eax_d = _ca_detect(har_p, u3h(fum), som, 2ULL * axe_d)) ) {
return c3y;
}
else {
fum = u3t(fum);
axe_d = (2ULL * axe_d) + 1;
}
}
}
}
/* u3a_detect(): for debugging, check if (som) is referenced from (fum).
**
** (som) and (fum) are both RETAINED.
*/
c3_d
u3a_detect(u3_noun fum, u3_noun som)
{
u3p(u3h_root) har_p = u3h_new();
c3_o ret_o;
ret_o = _ca_detect(har_p, fum, som, 1);
u3h_free(har_p);
return ret_o;
}
#endif
/* u3a_mint(): finish a measured proto-atom.
*/
u3_noun
u3a_mint(c3_w* sal_w, c3_w len_w)
{
c3_w* nov_w = (sal_w - c3_wiseof(u3a_atom));
u3a_atom* nov_u = (void*)nov_w;
/* See if we can free the slab entirely.
*/
if ( len_w == 0 ) {
u3a_wfree(nov_w);
return 0;
}
else if ( len_w == 1 ) {
c3_w low_w = nov_u->buf_w[0];
if ( _(u3a_is_cat(low_w)) ) {
u3a_wfree(nov_w);
return low_w;
}
}
/* See if we can strip off a block on the end.
*/
{
c3_w old_w = nov_u->len_w;
c3_w dif_w = (old_w - len_w);
if ( dif_w >= u3a_minimum ) {
c3_w* box_w = (void *)u3a_botox(nov_w);
c3_w* end_w = (nov_w + c3_wiseof(u3a_atom) + len_w + 1);
c3_w asz_w = (end_w - box_w);
c3_w bsz_w = box_w[0] - asz_w;
_box_attach(_box_make(end_w, bsz_w, 0));
box_w[0] = asz_w;
box_w[asz_w - 1] = asz_w;
}
nov_u->len_w = len_w;
}
return u3a_to_pug(u3a_outa(nov_w));
}
#ifdef U3_MEMORY_DEBUG
/* u3a_lush(): leak push.
*/
c3_w
u3a_lush(c3_w lab_w)
{
c3_w cod_w = u3_Code;
u3_Code = lab_w;
return cod_w;
}
/* u3a_lop(): leak pop.
*/
void
u3a_lop(c3_w lab_w)
{
u3_Code = lab_w;
}
#else
/* u3a_lush(): leak push.
*/
c3_w
u3a_lush(c3_w lab_w)
{
return 0;
}
/* u3a_lop(): leak pop.
*/
void
u3a_lop(c3_w lab_w)
{
}
#endif
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