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urbit/g/a.c
C. Guy Yarvin fb982e6dd6 No more external leaks.
2014-10-10 22:32:58 -07:00

1299 lines
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/* g/a.c
**
** This file is in the public domain.
*/
#include "all.h"
/* _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 == u3_cc_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.
*/
u3_cs_box*
_box_make(void* box_v, c3_w siz_w, c3_w use_w)
{
u3_cs_box* box_u = box_v;
c3_w* box_w = box_v;
box_w[0] = siz_w;
box_w[siz_w - 1] = siz_w;
box_u->use_w = use_w;
# ifdef U3_MEMORY_DEBUG
box_u->cod_w = u3_Code;
# endif
return box_u;
}
/* _box_attach(): attach a box to the free list.
*/
void
_box_attach(u3_cs_box* box_u)
{
c3_assert(box_u->siz_w >= (1 + c3_wiseof(u3_cs_fbox)));
#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(u3_cs_box); (i_w + 1) < box_u->siz_w; i_w++ ) {
box_w[i_w] = 0xdeadbeef;
}
}
#endif
u3R->all.fre_w += box_u->siz_w;
{
c3_w sel_w = _box_slot(box_u->siz_w);
u3_cs_fbox* fre_u = (void *)box_u;
u3_cs_fbox** pfr_u = &u3R->all.fre_u[sel_w];
u3_cs_fbox* nex_u = *pfr_u;
fre_u->pre_u = 0;
fre_u->nex_u = nex_u;
if ( fre_u->nex_u ) {
fre_u->nex_u->pre_u = fre_u;
}
(*pfr_u) = fre_u;
}
}
/* _box_detach(): detach a box from the free list.
*/
void
_box_detach(u3_cs_box* box_u)
{
u3_cs_fbox* fre_u = (void*) box_u;
u3_cs_fbox* pre_u = fre_u->pre_u;
u3_cs_fbox* nex_u = fre_u->nex_u;
u3R->all.fre_w -= box_u->siz_w;
if ( nex_u ) {
c3_assert(nex_u->pre_u == fre_u);
nex_u->pre_u = pre_u;
}
if ( pre_u ) {
c3_assert(pre_u->nex_u == fre_u);
pre_u->nex_u = nex_u;
}
else {
c3_w sel_w = _box_slot(box_u->siz_w);
c3_assert(fre_u == u3R->all.fre_u[sel_w]);
u3R->all.fre_u[sel_w] = nex_u;
}
}
/* _me_road_all_hat(): in u3R, allocate directly on the hat.
*/
static c3_w*
_me_road_all_hat(c3_w len_w)
{
if ( len_w > u3_co_open(u3R) ) {
u3_cm_bail(c3__meme); return 0;
}
if ( u3_yes == u3_co_is_north(u3R) ) {
c3_w* all_w;
all_w = u3R->hat_w;
u3R->hat_w += len_w;
return all_w;
}
else {
u3R->hat_w -= len_w;
return u3R->hat_w;
}
}
#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 > u3_co_open(u3R) ) {
u3_cm_bail(c3__meme); return 0;
}
if ( u3_yes == u3_co_is_north(u3R) ) {
u3R->cap_w -= len_w;
return u3R->cap_w;
}
else {
c3_w* all_w;
all_w = u3R->cap_w;
u3R->cap_w += len_w;
return all_w;
}
}
#endif
/* u3_ca_sane(): check allocator sanity.
*/
void
u3_ca_sane(void)
{
c3_w i_w;
for ( i_w = 0; i_w < u3_cc_fbox_no; i_w++ ) {
u3_cs_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;
}
}
}
/* _ca_walloc(): u3_ca_walloc() internals.
*/
static void*
_ca_walloc(c3_w len_w)
{
c3_w siz_w = c3_max(u3_cc_minimum, u3_co_boxed(len_w));
c3_w sel_w = _box_slot(siz_w);
// XX: this logic is totally bizarre, but preserve it.
//
if ( (sel_w != 0) && (sel_w != u3_cc_fbox_no - 1) ) {
sel_w += 1;
}
while ( 1 ) {
u3_cs_fbox** pfr_u = &u3R->all.fre_u[sel_w];
while ( 1 ) {
if ( 0 == *pfr_u ) {
if ( sel_w < (u3_cc_fbox_no - 1) ) {
sel_w += 1;
break;
}
else {
/* Nothing in top free list. Chip away at the hat_w.
*/
return u3_co_boxto(_box_make(_me_road_all_hat(siz_w), siz_w, 1));
}
}
else {
if ( siz_w > (*pfr_u)->box_u.siz_w ) {
/* This free block is too small. Continue searching.
*/
pfr_u = &((*pfr_u)->nex_u);
continue;
}
else {
u3_cs_box* box_u = &((*pfr_u)->box_u);
/* We have found a free block of adequate size. Remove it
** from the free list.
*/
{
{
c3_assert((0 == (*pfr_u)->pre_u) ||
(*pfr_u)->pre_u->nex_u == (*pfr_u));
c3_assert((0 == (*pfr_u)->nex_u) ||
(*pfr_u)->nex_u->pre_u == (*pfr_u));
}
if ( 0 != (*pfr_u)->nex_u ) {
(*pfr_u)->nex_u->pre_u = (*pfr_u)->pre_u;
}
*pfr_u = (*pfr_u)->nex_u;
}
/* If we can chop off another block, do it.
*/
if ( (siz_w + c3_wiseof(u3_cs_fbox) + 1) <= 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 u3_co_boxto(_box_make(box_w, siz_w, 1));
}
else {
c3_assert(0 == box_u->use_w);
box_u->use_w = 1;
#ifdef U2_MEMORY_DEBUG
box_u->cod_w = u3_Code;
#endif
return u3_co_boxto(box_u);
}
}
}
}
}
}
int FOO;
/* u3_ca_walloc(): allocate storage words on hat_w.
*/
void*
u3_ca_walloc(c3_w len_w)
{
void* ptr_v = _ca_walloc(len_w);
#if 0
if ( u3_co_botox(ptr_v) == (u3_cs_box*)(void *)0x2006a4b38 ) {
static int xuc_i;
printf("xuc_i %d\r\n", xuc_i);
if ( 31 == xuc_i ) { abort(); }
// if ( 9 == xuc_i ) { FOO = 1; }
xuc_i++;
}
#endif
return ptr_v;
}
/* u3_ca_malloc(): allocate storage measured in bytes.
*/
void*
u3_ca_malloc(c3_w len_w)
{
return u3_ca_walloc((len_w + 3) >> 2);
}
/* u3_ca_wealloc(): realloc in words.
*/
void*
u3_ca_wealloc(void* lag_v, c3_w len_w)
{
if ( !lag_v ) {
return u3_ca_malloc(len_w);
}
else {
u3_cs_box* box_u = u3_co_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 = u3_ca_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];
}
u3_ca_free(lag_v);
return new_w;
}
}
}
/* u3_ca_realloc(): realloc in bytes.
*/
void*
u3_ca_realloc(void* lag_v, c3_w len_w)
{
return u3_ca_wealloc(lag_v, (len_w + 3) >> 2);
}
/* u3_ca_free(): free storage.
*/
void
u3_ca_free(void* tox_v)
{
u3_cs_box* box_u = u3_co_botox(tox_v);
c3_w* box_w = (c3_w *)(void *)box_u;
c3_assert(box_u->use_w != 0);
box_u->use_w -= 1;
if ( 0 != box_u->use_w ) return;
#if 0
/* Clear the contents of the block, for debugging.
*/
{
c3_w i_w;
for ( i_w = c3_wiseof(u3_cs_box); (i_w + 1) < box_u->siz_w; i_w++ ) {
box_w[i_w] = 0xdeadbeef;
}
}
#endif
if ( u3_yes == u3_co_is_north(u3R) ) {
/* Try to coalesce with the block below.
*/
if ( box_w != u3R->rut_w ) {
c3_w laz_w = *(box_w - 1);
u3_cs_box* pox_u = (u3_cs_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) == u3R->hat_w ) {
u3R->hat_w = box_w;
}
else {
u3_cs_box* nox_u = (u3_cs_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) != u3R->rut_w ) {
u3_cs_box* nox_u = (u3_cs_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 == u3R->hat_w ) {
u3R->hat_w = (box_w + box_u->siz_w);
}
else {
c3_w laz_w = *(box_w - 1);
u3_cs_box* pox_u = (u3_cs_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);
}
}
}
#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 ( u3_so(u3_co_is_cat(som)) ) return;
if ( u3_ne(u3_co_north_is_junior(u3R, som)) ) return;
_me_wash_north(som);
}
static void
_me_wash_north(u3_noun dog)
{
c3_assert(u3_yes == u3_co_is_dog(dog));
// c3_assert(u3_yes == u3_co_north_is_junior(u3R, dog));
{
u3_cs_noun* dog_u = u3_co_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 ( u3_so(u3_co_is_pom(dog)) ) {
u3_cs_cell* god_u = (u3_cs_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 ( u3_so(u3_co_is_cat(som)) ) return;
if ( u3_ne(u3_co_south_is_junior(u3R, som)) ) return;
_me_wash_south(som);
}
static void
_me_wash_south(u3_noun dog)
{
c3_assert(u3_yes == u3_co_is_dog(dog));
// c3_assert(u3_yes == u3_co_south_is_junior(u3R, dog));
{
u3_cs_noun* dog_u = u3_co_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 ( u3_so(u3_co_is_pom(dog)) ) {
u3_cs_cell* god_u = (u3_cs_cell *)(void *)dog_u;
_me_wash_south_in(god_u->hed);
_me_wash_south_in(god_u->tel);
}
}
}
/* u3_cm_wash(): wash all lazy mugs. RETAIN.
*/
void
u3_cm_wash(u3_noun som)
{
if ( u3_so(u3_co_is_north(u3R)) ) {
_me_wash_north(som);
} else {
_me_wash_south(som);
}
}
#endif
/* _me_gain_use(): increment use count.
*/
static void
_me_gain_use(u3_noun dog)
{
c3_w* dog_w = u3_co_to_ptr(dog);
u3_cs_box* box_u = u3_co_botox(dog_w);
if ( 0x7fffffff == box_u->use_w ) {
u3_cm_bail(c3__fail);
}
else {
if ( box_u->use_w == 0 ) {
u3_cm_bail(c3__foul);
}
box_u->use_w += 1;
}
}
/* _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 ( u3_so(u3_co_is_cat(som)) ) {
return som;
}
else {
u3_noun dog = som;
if ( u3_so(u3_co_north_is_senior(u3R, dog)) ) {
return dog;
}
else if ( u3_so(u3_co_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(u3_yes == u3_co_north_is_junior(u3R, dog));
if ( u3_ne(u3_co_north_is_junior(u3R, dog)) ) {
if ( u3_ne(u3_co_north_is_senior(u3R, dog)) ) {
_me_gain_use(dog);
}
return dog;
}
else {
u3_cs_noun* dog_u = u3_co_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(u3_so(u3_co_north_is_normal(u3R, nov)));
_me_gain_use(nov);
return nov;
}
else {
if ( u3_yes == u3_co_is_pom(dog) ) {
u3_cs_cell* old_u = u3_co_to_ptr(dog);
c3_w* new_w = u3_ca_walloc(c3_wiseof(u3_cs_cell));
u3_noun new = u3_co_de_twin(dog, new_w);
u3_cs_cell* new_u = (u3_cs_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 {
u3_cs_atom* old_u = u3_co_to_ptr(dog);
c3_w* new_w = u3_ca_walloc(old_u->len_w + c3_wiseof(u3_cs_atom));
u3_noun new = u3_co_de_twin(dog, new_w);
u3_cs_atom* new_u = (u3_cs_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 ( u3_so(u3_co_is_cat(som)) ) {
return som;
}
else {
u3_noun dog = som;
if ( u3_so(u3_co_south_is_senior(u3R, dog)) ) {
return dog;
}
else if ( u3_so(u3_co_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(u3_yes == u3_co_south_is_junior(u3R, dog));
if ( u3_ne(u3_co_south_is_junior(u3R, dog)) ) {
if ( u3_ne(u3_co_south_is_senior(u3R, dog)) ) {
_me_gain_use(dog);
}
return dog;
}
else {
u3_cs_noun* dog_u = u3_co_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, u3_co_to_ptr(nov));
c3_assert(u3_so(u3_co_south_is_normal(u3R, nov)));
_me_gain_use(nov);
return nov;
}
else {
if ( u3_yes == u3_co_is_pom(dog) ) {
u3_cs_cell* old_u = u3_co_to_ptr(dog);
c3_w* new_w = u3_ca_walloc(c3_wiseof(u3_cs_cell));
u3_noun new = u3_co_de_twin(dog, new_w);
u3_cs_cell* new_u = (u3_cs_cell*)(void *)new_w;
// printf("south: cell %p to %p\r\n", old_u, new_u);
new_u->mug_w = old_u->mug_w;
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 {
u3_cs_atom* old_u = u3_co_to_ptr(dog);
c3_w* new_w = u3_ca_walloc(old_u->len_w + c3_wiseof(u3_cs_atom));
u3_noun new = u3_co_de_twin(dog, new_w);
u3_cs_atom* new_u = (u3_cs_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->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 ( u3_yes == u3_co_north_is_senior(u3R, dog) ) {
/* senior pointers are not refcounted
*/
return dog;
}
else if ( u3_yes == u3_co_north_is_junior(u3R, dog) ) {
/* junior pointers are copied
*/
u3_noun mos = _me_copy_north(dog);
// printf("north: %p to %p\r\n", u3_co_to_ptr(dog), u3_co_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 ( u3_yes == u3_co_south_is_senior(u3R, dog) ) {
/* senior pointers are not refcounted
*/
return dog;
}
else if ( u3_yes == u3_co_south_is_junior(u3R, dog) ) {
/* junior pointers are copied
*/
u3_noun mos = _me_copy_south(dog);
// printf("south: %p to %p\r\n", u3_co_to_ptr(dog), u3_co_to_ptr(mos));
return mos;
}
else {
/* normal pointers are refcounted
*/
_me_gain_use(dog);
return dog;
}
}
/* u3_ca_take(): gain, copying juniors.
*/
u3_noun
u3_ca_take(u3_noun som)
{
c3_assert(u3_none != som);
if ( u3_so(u3_co_is_cat(som)) ) {
return som;
}
else {
return u3_so(u3_co_is_north(u3R))
? _me_take_north(som)
: _me_take_south(som);
}
}
/* _me_gain_north(): gain on a north road.
*/
static u3_noun
_me_gain_north(u3_noun dog)
{
if ( u3_yes == u3_co_north_is_senior(u3R, dog) ) {
/* senior pointers are not refcounted
*/
return dog;
}
else {
/* junior nouns are disallowed
*/
c3_assert(u3_ne(u3_co_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 ( u3_yes == u3_co_south_is_senior(u3R, dog) ) {
/* senior pointers are not refcounted
*/
return dog;
}
else {
/* junior nouns are disallowed
*/
c3_assert(u3_ne(u3_co_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 ( u3_yes == u3_co_north_is_normal(u3R, dog) ) {
c3_w* dog_w = u3_co_to_ptr(dog);
u3_cs_box* box_u = u3_co_botox(dog_w);
if ( box_u->use_w > 1 ) {
box_u->use_w -= 1;
}
else {
if ( 0 == box_u->use_w ) {
u3_cm_bail(c3__foul);
}
else {
if ( u3_so(u3_co_is_pom(dog)) ) {
u3_cs_cell* dog_u = (void *)dog_w;
u3_noun h_dog = dog_u->hed;
u3_noun t_dog = dog_u->tel;
if ( u3_ne(u3_co_is_cat(h_dog)) ) {
_me_lose_north(h_dog);
}
u3_ca_free(dog_w);
if ( u3_ne(u3_co_is_cat(t_dog)) ) {
dog = t_dog;
goto top;
}
}
else {
u3_ca_free(dog_w);
}
}
}
}
}
/* _me_lose_south(): lose on a south road.
*/
static void
_me_lose_south(u3_noun dog)
{
top:
if ( u3_yes == u3_co_south_is_normal(u3R, dog) ) {
c3_w* dog_w = u3_co_to_ptr(dog);
u3_cs_box* box_u = u3_co_botox(dog_w);
if ( box_u->use_w > 1 ) {
box_u->use_w -= 1;
}
else {
if ( 0 == box_u->use_w ) {
u3_cm_bail(c3__foul);
}
else {
if ( u3_so(u3_co_is_pom(dog)) ) {
u3_cs_cell* dog_u = (void *)dog_w;
u3_noun h_dog = dog_u->hed;
u3_noun t_dog = dog_u->tel;
if ( u3_ne(u3_co_is_cat(h_dog)) ) {
_me_lose_south(h_dog);
}
u3_ca_free(dog_w);
if ( u3_ne(u3_co_is_cat(t_dog)) ) {
dog = t_dog;
goto top;
}
}
else {
u3_ca_free(dog_w);
}
}
}
}
}
/* u3_ca_gain(): gain a reference count in normal space.
*/
u3_noun
u3_ca_gain(u3_noun som)
{
c3_assert(u3_none != som);
#if 0
if ( FOO && (som == 3221949559) ) {
static int xuc_i;
printf("gain %d\r\n", xuc_i);
if ( 5 == xuc_i ) {
abort();
}
xuc_i++;
}
#endif
if ( u3_so(u3_co_is_cat(som)) ) {
return som;
}
else {
return u3_so(u3_co_is_north(u3R))
? _me_gain_north(som)
: _me_gain_south(som);
}
}
/* u3_ca_lose(): lose a reference count.
*/
void
u3_ca_lose(u3_noun som)
{
if ( u3_ne(u3_co_is_cat(som)) ) {
if ( u3_so(u3_co_is_north(u3R)) ) {
_me_lose_north(som);
} else {
_me_lose_south(som);
}
}
}
/* u3_ca_use(): reference count.
*/
c3_w
u3_ca_use(u3_noun som)
{
if ( u3_so(u3_co_is_cat(som)) ) {
return 1;
}
else {
c3_w* dog_w = u3_co_to_ptr(som);
u3_cs_box* box_u = u3_co_botox(dog_w);
return box_u->use_w;
}
}
/* u3_ca_mark_ptr(): mark a pointer for gc. Produce size.
*/
c3_w
u3_ca_mark_ptr(void* ptr_v)
{
if ( u3_so(u3_co_is_north(u3R)) ) {
c3_assert((ptr_v >= (void*)u3R->rut_w) && (ptr_v < (void*)u3R->hat_w));
}
else {
c3_assert((ptr_v >= (void*)u3R->hat_w) && (ptr_v < (void*)u3R->rut_w));
}
{
u3_cs_box* box_u = u3_co_botox(ptr_v);
c3_ws use_ws = (c3_ws)box_u->use_w;
c3_w siz_w;
if ( use_ws == 0 ) {
fprintf(stderr, "%p is bogus\r\n", ptr_v);
siz_w = 0;
}
else {
c3_assert(use_ws != 0);
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;
}
return siz_w;
}
}
/* u3_ca_mark_noun(): mark a noun for gc. Produce size.
*/
c3_w
u3_ca_mark_noun(u3_noun som)
{
c3_w siz_w = 0;
while ( 1 ) {
if ( u3_so(u3_co_is_senior(u3R, som)) ) {
return siz_w;
}
else {
c3_w* dog_w = u3_co_to_ptr(som);
c3_w new_w = u3_ca_mark_ptr(dog_w);
if ( 0 == new_w ) {
return siz_w;
}
else {
siz_w += new_w;
if ( u3_so(u3du(som)) ) {
siz_w += u3_ca_mark_noun(u3h(som));
som = u3t(som);
}
else return siz_w;
}
}
}
}
/* _ca_print_memory: print memory amount.
*/
static void
_ca_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);
}
}
}
/* u3_ca_sweep(): sweep a fully marked road.
*/
void
u3_ca_sweep(c3_c* cap_c)
{
c3_w neg_w, pos_w, leq_w, tot_w, caf_w;
/* Measure allocated memory by counting the free list.
*/
{
c3_w end_w;
c3_w fre_w = 0;
c3_w i_w;
end_w = u3_so(u3_co_is_north(u3R))
? (u3R->hat_w - u3R->rut_w)
: (u3R->rut_w - u3R->hat_w);
for ( i_w = 0; i_w < u3_cc_fbox_no; i_w++ ) {
u3_cs_fbox* fre_u = u3R->all.fre_u[i_w];
while ( fre_u ) {
fre_w += fre_u->box_u.siz_w;
fre_u = fre_u->nex_u;
}
}
neg_w = (end_w - fre_w);
}
/* Sweep through the arena, repairing and counting leaks.
*/
pos_w = leq_w = 0;
{
c3_w* box_w = u3_so(u3_co_is_north(u3R)) ? u3R->rut_w : u3R->hat_w;
while ( box_w < (u3_so(u3_co_is_north(u3R)) ? u3R->hat_w : u3R->rut_w) ) {
u3_cs_box* box_u = (void *)box_w;
c3_ws use_ws = (c3_ws)box_u->use_w;
if ( use_ws > 0 ) {
printf("leak %p\r\n", box_u);
if ( box_u->cod_w ) {
u3_cm_p(" code", box_u->cod_w);
}
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);
}
box_w += box_u->siz_w;
}
}
tot_w = u3_so(u3_co_is_north(u3R))
? u3R->mat_w - u3R->rut_w
: u3R->rut_w - u3R->mat_w;
caf_w = u3_so(u3_co_is_north(u3R))
? u3R->mat_w - u3R->cap_w
: u3R->cap_w - u3R->mat_w;
c3_assert((pos_w + leq_w) == neg_w);
// _ca_print_memory("available", (tot_w - pos_w));
// _ca_print_memory("allocated", pos_w);
_ca_print_memory("volatile", caf_w);
_ca_print_memory("leaked", leq_w);
}
/* u3_ca_slab(): create a length-bounded proto-atom.
*/
c3_w*
u3_ca_slab(c3_w len_w)
{
c3_w* nov_w = u3_ca_walloc(len_w + c3_wiseof(u3_cs_atom));
u3_cs_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;
}
/* u3_ca_slaq(): u3_ca_slaq() with a defined blocksize.
*/
c3_w*
u3_ca_slaq(c3_g met_g, c3_w len_w)
{
return u3_ca_slab(((len_w << met_g) + 31) >> 5);
}
/* u3_ca_malt(): measure and finish a proto-atom.
*/
u3_noun
u3_ca_malt(c3_w* sal_w)
{
c3_w* nov_w = (sal_w - c3_wiseof(u3_cs_atom));
u3_cs_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 u3_ca_mint(sal_w, len_w);
}
/* u3_ca_moot(): finish a pre-measured proto-atom; dangerous.
*/
u3_noun
u3_ca_moot(c3_w* sal_w)
{
c3_w* nov_w = (sal_w - c3_wiseof(u3_cs_atom));
u3_cs_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 ( u3_so(u3_co_is_cat(las_w)) ) {
u3_ca_free(nov_w);
return las_w;
}
}
return u3_co_to_pug(u3_co_outa(nov_w));
}
/* _ca_detect(): in u3_ca_detect().
*/
static c3_d
_ca_detect(u3_ch_root* har_u, u3_noun fum, u3_noun som, c3_d axe_d)
{
while ( 1 ) {
if ( som == fum ) {
return axe_d;
}
else if ( u3_ne(u3du(fum)) || (u3_none != u3_ch_get(har_u, fum)) ) {
return 0;
}
else {
c3_d eax_d;
u3_ch_put(har_u, fum, 0);
if ( 0 != (eax_d = _ca_detect(har_u, u3h(fum), som, 2ULL * axe_d)) ) {
return u3_yes;
}
else {
fum = u3t(fum);
axe_d = (2ULL * axe_d) + 1;
}
}
}
}
/* u3_ca_detect(): for debugging, check if (som) is referenced from (fum).
**
** (som) and (fum) are both RETAINED.
*/
c3_d
u3_ca_detect(u3_noun fum, u3_noun som)
{
u3_ch_root* har_u = u3_ch_new();
c3_o ret_o;
ret_o = _ca_detect(har_u, fum, som, 1);
u3_ch_free(har_u);
return ret_o;
}
/* u3_ca_mint(): finish a measured proto-atom.
*/
u3_noun
u3_ca_mint(c3_w* sal_w, c3_w len_w)
{
c3_w* nov_w = (sal_w - c3_wiseof(u3_cs_atom));
u3_cs_atom* nov_u = (void*)nov_w;
/* See if we can free the slab entirely.
*/
if ( len_w == 0 ) {
u3_ca_free(nov_w);
return 0;
}
else if ( len_w == 1 ) {
c3_w low_w = nov_u->buf_w[0];
if ( u3_so(u3_co_is_cat(low_w)) ) {
u3_ca_free(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 >= u3_cc_minimum ) {
c3_w* box_w = (void *)u3_co_botox(nov_w);
c3_w* end_w = (nov_w + c3_wiseof(u3_cs_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 u3_co_to_pug(u3_co_outa(nov_w));
}
/* u3_ca_lush(): leak push.
*/
c3_w
u3_ca_lush(c3_w lab_w)
{
c3_w cod_w = u3_Code;
u3_Code = lab_w;
return cod_w;
}
/* u3_ca_lop(): leak pop.
*/
void
u3_ca_lop(c3_w lab_w)
{
u3_Code = 0;
}
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