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urbit/f/rail.c
C. Guy Yarvin 1317ac3c1e Clean up requests from dead connections.
2014-04-14 11:01:18 -07:00

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/* f/rail.c
**
** This file is in the public domain.
*/
#include "all.h"
#ifdef U2_LEAK_DEBUG
c3_w COD_w;
#endif
/* _rl_feed():
**
** Initialize allocator in `ral`.
*/
static void
_rl_feed(u2_ray ral_r)
{
if ( c3__rock == u2_rail_hip_m(ral_r) ) {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
u2_rail_hat_r(ral_r) += c3_wiseof(u2_loom_soup);
{
c3_w i_w;
for ( i_w = 0; i_w < u2_soup_free_no; i_w++ ) {
u2_soup_fre_r(sop_r, i_w) = 0;
}
}
#ifdef U2_PROFILE_MEMORY
u2_soup_liv_w(sop_r) = 0;
#endif
u2_cs_init(lot_r);
}
}
/* u2_rl_init():
**
** Install an empty rail within `hat_r` and `mat_r` in the loom,
** with memory model `hip`.
**
** Returns ray to rail, which always equalls the passed `hat_r`.
*/
u2_ray
u2_rl_init(c3_m hip_m,
u2_ray hat_r,
u2_ray mat_r)
{
c3_assert(u2_ray_a(hat_r) != u2_ray_a(mat_r));
c3_assert(u2_ray_open(hat_r, mat_r, c3_wiseof(u2_loom_rail)));
{
u2_ray ral_r = hat_r;
/* Initial empty configuration. Don't fall, as there is no pork.
*/
hat_r += c3_wiseof(u2_loom_rail);
u2_rail_cap_r(ral_r) = mat_r;
u2_rail_hat_r(ral_r) = hat_r;
u2_rail_mat_r(ral_r) = mat_r;
u2_rail_rut_r(ral_r) = hat_r;
u2_rail_hip_m(ral_r) = hip_m;
_rl_feed(ral_r);
return ral_r;
}
}
/* u2_rl_boot():
**
** Create an empty rail in an empty loom, with memory model `hip`.
** See u2_rl_leap() for storage policies.
*/
u2_ray
u2_rl_boot(c3_m hip_m)
{
return u2_rl_init(hip_m, u2_ray_of(0, 0), u2_ray_of(1, 0));
}
/* u2_rl_leap():
**
** Reverse the beams forward.
*/
u2_bean
u2_rl_leap(u2_ray ral_r,
c3_m hop_m)
{
if ( hop_m == c3__rock ) {
if ( u2_no == u2_rl_open(ral_r, c3_wiseof(u2_loom_soup)) ) {
return u2_no;
}
} else {
if ( u2_no == u2_rl_open(ral_r, c3_wiseof(u2_loom_floe)) ) {
return u2_no;
}
}
/* Before:
* 0 rut hat 1GB
* | | | |
* |-------------------########-----------------------------|
* | | | |
* cap mat
*//* After:
* 0 mat+cap 1GB
* | |
* |--------------------#######-----------------------------|
* | / | |
* hat rut
*/
{
u2_ray cap_r = u2_rail_cap_r(ral_r);
u2_ray hat_r = u2_rail_hat_r(ral_r);
u2_ray mat_r = u2_rail_mat_r(ral_r);
u2_ray rut_r = u2_rail_rut_r(ral_r);
c3_m hip_m = u2_rail_hip_m(ral_r);
/* Classical beam reversal.
*/
{
u2_rail_cap_r(ral_r) = hat_r;
u2_rail_hat_r(ral_r) = cap_r;
u2_rail_mat_r(ral_r) = hat_r;
u2_rail_rut_r(ral_r) = cap_r;
u2_rail_hip_m(ral_r) = hop_m;
}
/* Store restoration data (pork) on mat under cap.
*/
{
u2_ray pik_r = u2_rail_cap_r(ral_r);
u2_rail_cap_r(ral_r) += c3_wiseof(u2_loom_pork);
u2_pork_mut_r(pik_r) = mat_r;
u2_pork_rit_r(pik_r) = rut_r;
u2_pork_hap_m(pik_r) = hip_m;
}
/* Activate allocation, if applicable.
*/
_rl_feed(ral_r);
}
return u2_yes;
}
/* u2_rl_fall():
**
** Reverse the beams backward, restoring the old mat and rut.
*/
void
u2_rl_fall(u2_ray ral_r)
{
/* Before:
* 0 rut hat 1GB
* | | | |
* |-------------------########-----------------------------|
* | | | |
* cap mat
*//* After:
* 0 mat cap 1GB
* | | | |
* |-------------------###############----------------------|
* | | | |
* hat rut
*/
{
u2_ray mat_r = u2_rail_mat_r(ral_r);
u2_ray hat_r = u2_rail_hat_r(ral_r);
u2_ray pik_r = mat_r;
u2_rail_cap_r(ral_r) = hat_r;
u2_rail_hat_r(ral_r) = mat_r;
u2_rail_mat_r(ral_r) = u2_pork_mut_r(pik_r);
u2_rail_rut_r(ral_r) = u2_pork_rit_r(pik_r);
u2_rail_hip_m(ral_r) = u2_pork_hap_m(pik_r);
}
}
/* u2_rl_leap_part():
**
** Reverse and split rail, inserting partition of size `num/dem`
** plus `tip`.
**
** Returns partition rail, `aux_r`.
*/
u2_ray
u2_rl_leap_part(u2_ray ral_r,
c3_m hop_m,
c3_w num_w,
c3_w dem_w,
c3_w tip_w)
{
u2_ray cap_r = u2_rail_cap_r(ral_r);
u2_ray hat_r = u2_rail_hat_r(ral_r);
u2_ray mat_r = u2_rail_mat_r(ral_r);
u2_ray rut_r = u2_rail_rut_r(ral_r);
c3_m hip_m = u2_rail_hip_m(ral_r);
c3_w siz_w;
c3_w pad_w;
/* Compute and control partition size.
*/
{
c3_assert(num_w > 0); c3_assert(dem_w > 0); c3_assert((num_w + 1) < dem_w);
{
c3_w gap_w = u2_ray_gap(cap_r, hat_r);
pad_w = (gap_w / dem_w);
siz_w = (num_w * pad_w) + tip_w;
if ( (siz_w < 64) || (gap_w < (siz_w + 64)) ) {
/* Entirely arbitrary, excessive and unfair.
*/
u2_ho_warn_here();
return 0;
}
}
}
/* Before:
* 0 rut hat
* | | |
* |-------------^-----##########################------$----|
* | | |
* cap mat
* Auxiliary rail:
*
* 0 rut hat
* | | /
* |-------------------^###########-------------------------|
* | | |
* cap mat
* Main rail:
*
* 0 rut hat
* | | /
* |--------------------------------^###########$-----------|
* | / |
* cap mat
* # == unallocated data
* - == frozen data
* ^ == allocation control block
* $ == frame control block
*/
{
u2_ray aux_r = u2_ray_over(hat_r, siz_w);
/* Auxiliary rail.
*/
{
u2_rail_rut_r(aux_r) = hat_r;
u2_rail_hat_r(aux_r) = hat_r;
u2_rail_mat_r(aux_r) = mat_r;
u2_rail_cap_r(aux_r) = (aux_r + c3_wiseof(u2_loom_rail));
u2_rail_hip_m(aux_r) = c3__rock;
_rl_feed(aux_r);
}
/* Main rail.
*/
{
u2_rail_rut_r(ral_r) = (hat_r + siz_w);
u2_rail_hat_r(ral_r) = (hat_r + siz_w);
u2_rail_mat_r(ral_r) = cap_r;
u2_rail_cap_r(ral_r) = cap_r;
u2_rail_hip_m(ral_r) = hip_m;
/* Pork - partition recovery record.
*/
{
u2_ray pik_r = u2_rail_mat_r(ral_r);
u2_rail_cap_r(ral_r) += c3_wiseof(u2_loom_pork);
u2_pork_mut_r(pik_r) = mat_r;
u2_pork_rit_r(pik_r) = rut_r;
u2_pork_hap_m(pik_r) = hip_m;
}
_rl_feed(ral_r);
}
return aux_r;
}
}
/* u2_rl_fall_part():
**
** Fall on `ral`, also releasing the partition `aux` - assimilation style.
*/
void
u2_rl_fall_part(u2_ray ral_r,
u2_ray aux_r)
{
/*
* Initially:
* 0 rut hat
* | | |
* |-------------^-----##########################------$----|
* | | |
* cap mat
* Main rail, initially:
*
* 0 rut hat
* | | /
* |--------------------------------^###########$-----------|
* | / |
* cap mat
* Main rail, later:
*
* 0 rut hat
* | | |
* |--------------------------------^---####----$-----------|
* | | |
* cap mat
* Auxiliary rail, initially:
*
* 0 rut hat
* | | /
* |-------------------^###########-------------------------|
* | | |
* cap mat
*
* Auxiliary rail, later:
*
* 0 rut hat
* | | |
* |-------------------^----###-----------------------------|
* | | |
* cap mat
*
* On return, assimilate style A (right, not supported):
*
* 0 rut hat
* | | |
* |-------------^------------###################------$----|
* | | |
* cap mat
* On return, compose style B (wrong, not supported):
*
* 0 rut hat
* | | |
* |-------------^-------------------------------------$----|
* | | |
* cap mat
*/
c3_assert(0);
/* To correctly assimilate a returning partition:
**
** (1) gain all aux storage referenced from main hat
** (2) release all aux storage
** (3) copy main hat noun to aux store
** (4) merge aux store with deep rut, if rock; compact
*/
}
/* _rl_bloq_make():
**
** Install a liquid block at `box_r`, with size `siz_w` and
** use count `use_w`.
*/
static void
_rl_bloq_make(u2_ray ral_r,
u2_ray box_r,
c3_w siz_w,
c3_w use_w)
{
c3_assert(siz_w >= 5);
{
*u2_at_ray(box_r) = siz_w;
*u2_at_ray(box_r + 1) = use_w;
#ifdef U2_LEAK_DEBUG
*u2_at_ray(box_r + 2) = COD_w;
#endif
*u2_at_ray(box_r + siz_w - 1) = siz_w;
}
}
/* _rl_free_select()
**
** Select the correct free list for an object.
*/
c3_w
_rl_free_select(c3_w siz_w)
{
#if 0
if ( siz_w == 6 ) {
return 0;
}
else return 1;
#else
if ( siz_w == 6 ) {
return 0;
}
else {
c3_w i_w = 1;
while ( 1 ) {
if ( i_w == u2_soup_free_no ) {
return (i_w - 1);
}
if ( siz_w < 16 ) {
return i_w;
}
siz_w = (siz_w + 1) >> 1;
i_w += 1;
}
}
#endif
}
/* _rl_bloq_attach():
**
** Attach the bloq at `box_r` to the appropriate free list.
*/
static void
_rl_bloq_attach(u2_ray ral_r,
u2_ray box_r)
{
c3_w siz_w = u2_rail_box_siz(box_r);
c3_w sel_w = _rl_free_select(siz_w);
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray fre_r = u2_soup_fre_r(sop_r, sel_w);
u2_rail_hut_pre(box_r) = 0;
u2_rail_hut_nex(box_r) = u2_soup_fre_r(sop_r, sel_w);
if ( 0 != fre_r ) {
c3_assert(u2_rail_hut_pre(fre_r) == 0);
u2_rail_hut_pre(fre_r) = box_r;
}
u2_soup_fre_r(sop_r, sel_w) = box_r;
}
/* _rl_bloq_detach():
**
** Unlist the bloq at `box_r` from its free list.
*/
static void
_rl_bloq_detach(u2_ray ral_r,
u2_ray box_r)
{
c3_w siz_w = u2_rail_box_siz(box_r);
c3_w sel_w = _rl_free_select(siz_w);
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray pre_r = u2_rail_hut_pre(box_r);
u2_ray nex_r = u2_rail_hut_nex(box_r);
if ( 0 != pre_r ) {
u2_rail_hut_nex(pre_r) = nex_r;
} else {
u2_soup_fre_r(sop_r, sel_w) = u2_rail_hut_nex(box_r);
}
if ( 0 != nex_r ) {
u2_rail_hut_pre(nex_r) = pre_r;
}
}
/* _rl_live_grab():
*/
#ifdef U2_PROFILE_MEMORY
static void
_rl_live_grab(u2_ray ral_r,
c3_ws wad_ws)
{
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_soup_liv_w(sop_r) += wad_ws;
}
#else
# define _rl_live_grab(ral_r, wad_ws)
#endif
/* u2_rl_dump():
**
** Print memory structure for benefit of archeologists.
*/
void
u2_rl_dump(u2_ray ral_r)
{
if ( c3__rock == u2_rail_hip_m(ral_r) ) {
u2_ray sop_r = u2_rail_rut_r(ral_r);
c3_w i_w;
c3_w tot_w;
c3_w rag_w;
printf("soup dump:\n");
tot_w = 0;
for ( i_w=0; i_w < u2_soup_free_no; i_w++ ) {
u2_ray box_r = u2_soup_fre_r(sop_r, i_w);
c3_w num_w = 0;
c3_w min_w = 0xffffffff;
c3_w max_w = 0;
c3_w all_w = 0;
while ( box_r ) {
c3_w siz_w = u2_rail_box_siz(box_r);
if ( siz_w < min_w ) {
min_w = siz_w;
}
if ( siz_w > max_w ) {
max_w = siz_w;
}
all_w += siz_w;
num_w++;
box_r = u2_rail_hut_nex(box_r);
}
tot_w += all_w;
if ( num_w != 0 ) {
printf(" list %d, num %d, min %d, max %d, kb %d.%d.%d\n",
i_w, num_w, min_w, max_w,
((all_w * 4) >> 20),
((all_w * 4) >> 10) % 1024,
((all_w * 4) % 1024));
}
}
rag_w = HalfSize -
( u2_ray_b(u2_rail_hat_r(ral_r)) +
u2_ray_b(u2_rail_cap_r(ral_r)));
tot_w += rag_w;
printf(" tail free kb %d.%d.%d\n",
((rag_w * 4) >> 20),
((rag_w * 4) >> 10) % 1024,
((rag_w * 4) % 1024));
printf("soup: cap %x, hat %x, free %d.%d.%d\n",
u2_ray_b(u2_rail_hat_r(ral_r)),
u2_ray_b(u2_rail_cap_r(ral_r)),
((tot_w * 4) >> 20),
((tot_w * 4) >> 10) % 1024,
((tot_w * 4) % 1024));
}
}
extern void u2_loop_signal_memory(void);
/* _rl_bloq_cheq(): check box against leak hunt.
*/
static void
_rl_bloq_cheq(u2_ray box_r)
{
#if 0
u2_ray bad_r = 0x85461f;
int z = 37;
int y = 99;
static int x;
if ( box_r == bad_r ) {
fprintf(stderr, "BOX %x/%d: size %d\r\n", bad_r, x, u2_rail_box_siz(box_r));
if ( x == y ) { c3_assert(0); } else { x++; }
}
#endif
#if 0
if ( u2_rail_box_siz(box_r) == z ) {
fprintf(stderr, "BOX %x/%d: size %d\r\n", bad_r, x, u2_rail_box_siz(box_r));
if ( x == y ) { c3_assert(0); } else { x++; }
}
#endif
}
/* _rl_bloq_grab():
**
** Allocate `len_w` words of memory on `ral_r`, or return 0.
*/
static u2_ray
_rl_bloq_grab(u2_ray ral_r,
c3_w len_w)
{
if ( c3__sand == u2_rail_hip_m(ral_r) ) {
/* Sand allocation - no box, no overhead.
*/
if ( u2_no == u2_rl_open(ral_r, len_w) ) {
u2_loop_signal_memory();
return 0;
}
else {
u2_ray box_r;
box_r = u2_rail_hat_r(ral_r);
u2_rail_hat_r(ral_r) += len_w;
return box_r;
}
}
else c3_assert(c3__rock == u2_rail_hip_m(ral_r));
{
u2_ray sop_r = u2_rail_rut_r(ral_r);
c3_w siz_w = (len_w + c3_wiseof(u2_loom_rail_box) + 1);
c3_w sel_w = _rl_free_select(siz_w);
u2_ray pfr_r;
if ( (sel_w != 0) && (sel_w != u2_soup_free_no - 1) ) {
sel_w += 1;
}
while ( 1 ) {
pfr_r = u2_aftr(sop_r, u2_loom_soup, fre_r) + sel_w;
while ( 1 ) {
u2_ray fre_r = *u2_at_ray(pfr_r);
u2_ray box_r;
if ( 0 == fre_r ) {
if ( sel_w < (u2_soup_free_no - 1) ) {
sel_w += 1;
break;
}
else {
/* Nothing in top free list. Chip away at the hat.
*/
if ( u2_no == u2_rl_open(ral_r, siz_w) ) {
#if 1
u2_loop_signal_memory();
#else
/* Yo, our rail is totally full.
*/
printf("lose: siz_w: %d sel_w: %d\n", siz_w, sel_w);
u2_rl_dump(ral_r);
u2_ho_warn_here();
// XX: integrate with integral wire.
//
// A bunch of testing is needed to make this actually work.
// return 0;
c3_assert(0);
#endif
}
else {
box_r = u2_rail_hat_r(ral_r);
u2_rail_hat_r(ral_r) += siz_w;
_rl_bloq_make(ral_r, box_r, siz_w, 1);
_rl_live_grab(ral_r, siz_w);
_rl_bloq_cheq(box_r);
return (box_r + c3_wiseof(u2_loom_rail_box));
}
}
} else {
if ( siz_w > u2_rail_hut_siz(fre_r) ) {
/* This free block is too small. Continue searching.
*/
pfr_r = u2_aftr(fre_r, u2_loom_rail_hut, nex_r);
}
else {
/* We have found a free block of adequate size. Remove it
** from the free list.
*/
box_r = fre_r;
{
u2_ray pre_r = u2_rail_hut_pre(box_r);
u2_ray nex_r = u2_rail_hut_nex(box_r);
c3_assert((0 == pre_r) ||
(u2_at_ray(pfr_r) == &u2_rail_hut_nex(pre_r)));
*u2_at_ray(pfr_r) = nex_r;
if ( 0 != nex_r ) {
u2_rail_hut_pre(nex_r) = pre_r;
}
}
if ( (siz_w + 6) < u2_rail_hut_siz(box_r) ) {
/* Split the block.
*/
u2_ray end_r = (box_r + siz_w);
_rl_bloq_make(ral_r, end_r, u2_rail_hut_siz(fre_r) - siz_w, 0);
_rl_bloq_attach(ral_r, end_r);
_rl_bloq_make(ral_r, box_r, siz_w, 1);
_rl_live_grab(ral_r, siz_w);
}
else {
c3_assert(u2_rail_box_use(box_r) == 0);
u2_rail_box_use(box_r) = 1;
# ifdef U2_LEAK_DEBUG
*u2_at_ray(box_r + 2) = COD_w;
# endif
_rl_live_grab(ral_r, u2_rail_hut_siz(box_r));
}
_rl_bloq_cheq(box_r);
return (box_r + c3_wiseof(u2_loom_rail_box));
}
}
}
}
}
}
/* _rl_bloq_free():
**
** Release and coalesce a block.
*/
static void
_rl_bloq_free(u2_ray ral_r,
u2_ray box_r)
{
u2_ray rut_r = u2_rail_rut_r(ral_r);
u2_ray beg_r = (rut_r + c3_wiseof(u2_loom_soup));
u2_ray hat_r = u2_rail_hat_r(ral_r);
c3_assert(u2_rail_hip_m(ral_r) == c3__rock);
c3_assert(u2_rail_hut_use(box_r) == 0);
c3_assert(u2_ray_a(box_r) == u2_ray_a(rut_r));
c3_assert(box_r >= rut_r);
/* Clear the contents of the block, for debugging.
*/
{
c3_w siz_w = u2_rail_box_siz(box_r);
u2_ray bod_r;
for ( bod_r = (box_r + c3_wiseof(u2_loom_rail_box));
(bod_r + 1) < (box_r + siz_w);
bod_r++ )
{
*u2_at_ray(bod_r) = 0xdeadbeef;
}
}
_rl_live_grab(ral_r, (-1 * u2_rail_hut_siz(box_r)));
/* Try to coalesce with the previous block.
*/
if ( box_r != beg_r ) {
c3_w las_w = *u2_at_ray(box_r - 1);
u2_ray tod_r = (box_r - las_w);
if ( 0 == u2_rail_hut_use(tod_r) ) {
_rl_bloq_detach(ral_r, tod_r);
_rl_bloq_make(ral_r, tod_r, (las_w + u2_rail_hut_siz(box_r)), 0);
box_r = tod_r;
}
}
/* Try to coalesce with the next block, or with the wilderness.
*/
{
c3_w siz_w = u2_rail_hut_siz(box_r);
if ( (box_r + siz_w == hat_r) ) {
u2_rail_hat_r(ral_r) = box_r;
}
else {
u2_ray hob_r = (box_r + siz_w);
if ( 0 == u2_rail_hut_use(hob_r) ) {
_rl_bloq_detach(ral_r, hob_r);
_rl_bloq_make(ral_r, box_r, (siz_w + u2_rail_hut_siz(hob_r)), 0);
}
/* Add to the appropriate free list.
*/
_rl_bloq_attach(ral_r, box_r);
}
}
}
#if 0
/* _rl_sloq_free(): wrapper for _rl_bloq_free(), disabling signals.
*/
static void
_rl_sloq_free(u2_ray ral_r,
u2_ray box_r)
{
return _rl_bloq_free(ral_r, box_r);
}
/* _rl_sloq_grab(): wrapper for _rl_bloq_grab(), disabling signals.
*/
static u2_ray
_rl_sloq_grab(u2_ray ral_r,
c3_w len_w)
{
return _rl_bloq_grab(ral_r, len_w);
}
#endif
/* u2_rl_ralloc():
**
** Allocate `siz_w` words of raw ray storage.
*/
u2_ray
u2_rl_ralloc(u2_ray ral_r,
c3_w siz_w)
{
return _rl_bloq_grab(ral_r, siz_w);
}
/* u2_rl_rfree():
**
** Free raw ray storage allocated by `u2_rl_ralloc()`.
*/
void
u2_rl_rfree(u2_ray ral_r,
u2_ray nov_r)
{
if ( c3__rock == u2_rail_hip_m(ral_r) ) {
u2_ray box_r = (nov_r - c3_wiseof(u2_loom_rail_box));
c3_assert(u2_rail_box_use(box_r) == 1);
u2_rail_box_use(box_r) = 0;
_rl_bloq_free(ral_r, box_r);
}
}
/* u2_rl_malloc():
**
** Allocate `sib_w` *bytes* of raw C storage.
*/
void*
u2_rl_malloc(u2_ray ral_r,
c3_w sib_w)
{
c3_w siz_w = (sib_w + 3) >> 2;
u2_ray nov_r = u2_rl_ralloc(ral_r, c3_max(5, siz_w));
return u2_at_ray(nov_r);
}
/* u2_rl_free():
**
** Free storage allocated by u2_rl_malloc().
*/
void
u2_rl_free(u2_ray ral_r,
void* lag_v)
{
u2_ray nov_r = u2_nit_at(lag_v);
c3_assert(lag_v == u2_at_ray(nov_r));
u2_rl_rfree(ral_r, nov_r);
}
/* u2_rl_gain():
**
** Gain a reference to [som] in [ral_r].
*/
u2_noun
u2_rl_gain(u2_ray ral_r,
u2_noun som)
{
if ( u2_none == som ) {
return u2_none;
}
if ( u2_fly_is_dog(som) ) {
u2_ray som_r = u2_dog_a(som);
u2_ray hat_r = u2_rail_hat_r(ral_r);
if ( u2_ray_a(som_r) == u2_ray_a(hat_r) ) {
c3_m hip_m = u2_rail_hip_m(ral_r);
if ( c3__rock == hip_m ) {
u2_ray rut_r = u2_rail_rut_r(ral_r);
if ( som_r > rut_r ) {
u2_ray box_r = (som_r - c3_wiseof(u2_loom_rail_box));
c3_w use_w = u2_rail_box_use(box_r);
c3_assert(use_w != 0);
if ( use_w != 0x7fffffff ) {
u2_rail_box_use(box_r) = (use_w + 1);
}
}
}
}
else {
/* In the can (above the mat), counting propagates down.
*/
if ( u2_dog_is_pom(som) ) {
u2_ray mat_r = u2_rail_mat_r(ral_r);
if ( som_r >= mat_r ) {
u2_rl_gain(ral_r, *u2_at(som_r, u2_loom_cell, hed_r));
u2_rl_gain(ral_r, *u2_at(som_r, u2_loom_cell, tel_r));
}
}
}
}
return som;
}
/* u2_rl_ok():
**
** Ensure that all reference counts are valid in `som`.
*/
void
u2_rl_ok(u2_ray ral_r,
u2_noun som)
{
if ( (u2_none == som) || u2_fly_is_cat(som) ) {
return;
}
else {
u2_ray som_r = u2_dog_a(som);
u2_ray hat_r = u2_rail_hat_r(ral_r);
if ( u2_ray_a(som_r) == u2_ray_a(hat_r) ) {
c3_m hip_m = u2_rail_hip_m(ral_r);
if ( c3__rock == hip_m ) {
u2_ray rut_r = u2_rail_rut_r(ral_r);
if ( som_r >= rut_r ) {
u2_ray box_r = (som_r - c3_wiseof(u2_loom_rail_box));
c3_w use_w = u2_rail_box_use(box_r);
if ( use_w == 0 ) {
fprintf(stderr, "free noun: %u\n", som);
c3_assert(0);
}
}
}
}
if ( u2_yes == u2_dust(som) ) {
u2_rl_ok(ral_r, u2_h(som));
u2_rl_ok(ral_r, u2_t(som));
}
}
}
/* u2_rl_refs():
**
** Return the reference count of (som). For debugging.
*/
c3_w
u2_rl_refs(u2_ray ral_r,
u2_noun som)
{
if ( u2_fly_is_cat(som) ) {
return 1;
}
else {
u2_ray som_r = u2_dog_a(som);
u2_ray hat_r = u2_rail_hat_r(ral_r);
if ( u2_ray_a(som_r) == u2_ray_a(hat_r) ) {
c3_m hip_m = u2_rail_hip_m(ral_r);
if ( c3__rock == hip_m ) {
u2_ray rut_r = u2_rail_rut_r(ral_r);
if ( som_r >= rut_r ) {
u2_ray box_r = (som_r - c3_wiseof(u2_loom_rail_box));
c3_w use_w = u2_rail_box_use(box_r);
return use_w;
}
}
}
}
return 1;
}
/* u2_rl_lose():
**
** Lose a reference to (som). Free it if refcount == 0.
*/
void
u2_rl_lose(u2_ray ral_r,
u2_noun som)
{
if ( u2_none == som ) {
return;
}
top:
if ( u2_fly_is_dog(som) ) {
u2_ray som_r = u2_dog_a(som);
u2_ray hat_r = u2_rail_hat_r(ral_r);
if ( u2_ray_a(som_r) == u2_ray_a(hat_r) ) {
c3_m hip_m = u2_rail_hip_m(ral_r);
if ( c3__rock == hip_m ) {
u2_ray rut_r = u2_rail_rut_r(ral_r);
if ( som_r >= rut_r ) {
u2_ray box_r = (som_r - c3_wiseof(u2_loom_rail_box));
c3_w use_w = u2_rail_box_use(box_r);
if ( 1 == use_w ) {
if ( u2_dog_is_pom(som) ) {
u2_noun h_som = u2_h(som);
u2_noun t_som = u2_t(som);
u2_rl_lose(ral_r, h_som);
u2_rail_box_use(box_r) = 0;
_rl_bloq_free(ral_r, box_r);
som = t_som;
goto top;
}
else {
u2_rail_box_use(box_r) = 0;
_rl_bloq_free(ral_r, box_r);
}
}
else {
// if ( use_w == 0 ) { u2_err(ral_r, "useless", som); }
c3_assert(use_w != 0);
if ( use_w != 0x7fffffff ) {
u2_rail_box_use(box_r) = (use_w - 1);
}
}
}
}
}
else {
/* In the can (above the mat), counting propagates down.
*/
if ( u2_dog_is_pom(som) ) {
u2_ray mat_r = u2_rail_mat_r(ral_r);
if ( som_r >= mat_r ) {
u2_noun h_som = u2_h(som);
u2_noun t_som = u2_t(som);
u2_rl_lose(ral_r, h_som);
som = t_som;
goto top;
}
}
}
}
}
/* u2_rl_senior():
**
** Yes iff `som` is senior in `ral` - ie, does not
** require reference counting.
*/
u2_bean
u2_rl_senior(u2_ray ral_r,
u2_noun som)
{
if ( u2_fly_is_dog(som) ) {
u2_ray som_r = u2_dog_a(som);
u2_ray hat_r = u2_rail_hat_r(ral_r);
if ( u2_ray_a(som_r) == u2_ray_a(hat_r) ) {
u2_ray rut_r = u2_rail_rut_r(ral_r);
c3_m hip_m = u2_rail_hip_m(ral_r);
if ( (c3__rock == hip_m) && (som_r > rut_r) ) {
return u2_no;
}
}
else {
u2_ray mat_r = u2_rail_mat_r(ral_r);
if ( som_r >= mat_r ) {
return u2_no;
}
}
}
return u2_yes;
}
/* u2_rl_junior():
**
** Yes iff `som` is junior in `ral` - ie, must be copied
** to be referenced on the hat.
*/
u2_bean
u2_rl_junior(u2_ray ral_r,
u2_noun som)
{
if ( u2_fly_is_cat(som) ) {
return u2_no;
}
else {
u2_ray som_r = u2_dog_a(som);
u2_ray hat_r = u2_rail_hat_r(ral_r);
u2_ray mat_r = u2_rail_mat_r(ral_r);
u2_nit som_n = u2_ray_fnit(som_r);
u2_nit hat_n = u2_ray_fnit(hat_r);
u2_nit mat_n = u2_ray_fnit(mat_r);
if ( u2_ray_a(hat_r) == 0 ) {
if ( (som_n >= hat_n) && (som_n <= mat_n) )
return u2_yes;
else return u2_no;
} else {
if ( (som_n >= mat_n) && (som_n <= hat_n) )
return u2_yes;
else return u2_no;
}
}
}
/* u2_rl_flog():
**
** Release the can, setting cap to top of pot.
*/
void
u2_rl_flog(u2_ray ral_r)
{
u2_rail_cap_r(ral_r) = u2_rail_mat_r(ral_r);
}
/* u2_rl_open():
**
** Yes iff [a] more words remain in the pad.
*/
u2_bean
u2_rl_open(u2_ray ral_r,
c3_w a_w)
{
return
((a_w + u2_ray_b(u2_rail_hat_r(ral_r)) + u2_ray_b(u2_rail_cap_r(ral_r)))
>= HalfSize)
? u2_no
: u2_yes;
}
/* u2_rl_clear():
**
** Yes iff [lef] does not point to any word >= [net]
** and < [bat].
*/
u2_bean
u2_rl_clear(u2_noun lef,
u2_ray net_r,
u2_ray bat_r)
{
c3_assert(u2_ray_a(net_r) == u2_ray_a(bat_r));
if ( u2_fly_is_cat(lef) ) {
return u2_yes;
} else {
u2_ray ray_lef = u2_dog_a(lef);
if ( u2_ray_a(ray_lef) != u2_ray_a(net_r) ) {
return u2_yes;
}
else if ( ray_lef < net_r ) {
return u2_yes;
}
else if ( ray_lef >= bat_r ) {
if ( u2_dog_is_pom(lef) ) {
u2_noun hed = *u2_at_pom_hed(lef);
u2_noun tel = *u2_at_pom_tel(lef);
if ( (u2_yes == u2_rl_clear(hed, net_r, bat_r)) &&
(u2_yes == u2_rl_clear(tel, net_r, bat_r)) ) {
return u2_yes;
}
else return u2_no;
}
else return u2_yes;
}
else return u2_no;
}
}
/* u2_rl_tamp():
**
** Tamp, eliding the segment from [net_r] up to [bat_r],
** preserving the root [lef].
**
** Assumes u2_rl_clear() with the same arguments.
*/
/* _tamp_swizzle()::
**
** Shift the root [lef], above [bat], down by [pif].
*/
static void
_tamp_swizzle(u2_noun lef,
c3_w pif_w,
u2_ray bat_r,
c3_b nax_b[])
{
/* Totally unnecessary assertions.
*/
{
c3_assert(u2_fly_is_dog(lef));
c3_assert(u2_dog_a(lef) >= bat_r);
}
/* Only poms are fixed.
*/
if ( u2_dog_is_pom(lef) ) {
u2_ray ray_lef = u2_dog_a(lef);
/* Is this pom fixed?
*/
if ( nax_b[ray_lef - bat_r] ) {
return;
}
else {
/* Fix the pom!
*/
nax_b[ray_lef - bat_r] = 1;
{
u2_noun fes = *u2_at_pom_hed(lef);
u2_noun hoz = *u2_at_pom_tel(lef);
if ( u2_fly_is_dog(fes) &&
(u2_dog_beam(fes) == u2_ray_beam(bat_r)) &&
(u2_dog_ray(fes) >= bat_r) )
{
/* Rewrite the pointer.
*/
*u2_at_pom_hed(lef) = (fes - (pif_w << 2));
/* Swizzle into it.
*/
_tamp_swizzle(fes, pif_w, bat_r, nax_b);
}
if ( u2_fly_is_dog(hoz) &&
(u2_dog_beam(hoz) == u2_ray_beam(bat_r)) &&
(u2_dog_ray(hoz) >= bat_r) )
{
/* Rewrite the pointer.
*/
*u2_at_pom_tel(lef) = (hoz - (pif_w << 2));
/* Swizzle into it.
*/
_tamp_swizzle(hoz, pif_w, bat_r, nax_b);
}
}
}
}
}
u2_noun
u2_rl_tamp(u2_ray ral_r,
u2_noun lef,
u2_ray net_r,
u2_ray bat_r)
{
/* pif: length of the segment to elide.
** lam: length of the segment to shift down over it.
*/
c3_w pif_w = (bat_r - net_r);
c3_w lam_w = (u2_rail_cap_r(ral_r) - bat_r);
c3_w i_w;
/* Stupid, unnecessary assertions.
*/
c3_assert(u2_ray_a(bat_r) == u2_ray_a(net_r));
c3_assert(bat_r >= net_r);
c3_assert(u2_rail_cap_r(ral_r) >= bat_r);
/* Check that there's actually a root. If not, tamp is trivial.
*/
if ( !u2_fly_is_dog(lef) ||
(u2_ray_a(u2_dog_a(lef)) != u2_ray_a(net_r)) ||
(u2_dog_a(lef) < bat_r) )
{
u2_rail_cap_r(ral_r) = net_r;
return lef;
}
/* Swizzle the good segment down to its new location.
**
** nax[i_w]: 1 iff a pom at bat[i_w] has been fixed.
*/
{
c3_b nax_b[lam_w];
c3_w i_w;
for ( i_w = 0; i_w < lam_w; i_w++ ) {
nax_b[i_w] = 0;
}
_tamp_swizzle(lef, pif_w, bat_r, nax_b);
}
/* Move the good segment down.
*/
for ( i_w = 0; i_w < lam_w; i_w++ ) {
*u2_at_ray((net_r + i_w)) = *u2_at_ray((bat_r + i_w));
}
u2_rail_cap_r(ral_r) -= pif_w;
/* Move and return [lef].
*/
return (lef - (pif_w << 2));
}
/* u2_rl_water():
**
** Return east and west watermarks, respectively.
*/
void
u2_rl_water(u2_ray ral_r,
c3_w* maz_w,
c3_w* boc_w)
{
if ( !u2_ray_beam(u2_rail_hat_r(ral_r)) ) {
*maz_w = u2_ray_point(u2_rail_hat_r(ral_r));
*boc_w = u2_ray_point(u2_rail_cap_r(ral_r));
} else {
*maz_w = u2_ray_point(u2_rail_cap_r(ral_r));
*boc_w = u2_ray_point(u2_rail_hat_r(ral_r));
}
}
#if 1
/* u2_rl_copy():
**
** Copy indirect noun `fiz` into main storage, preserving dags.
** Must be followed by `rl_wash(fiz)` if `fiz` is to be preserved.
*/
u2_weak // transfer
u2_rl_copy(u2_ray ral_r,
u2_dog fiz) // retain
{
if ( u2_no == u2_rl_junior(ral_r, fiz) ) {
u2_rl_gain(ral_r, fiz);
return fiz;
}
else {
c3_w mug_w = *u2_at_dog_mug(fiz);
/* Borrow mug slot to record new destination, if it doesn't already.
*/
if ( mug_w >> 31 ) { // mug is 31 bits
u2_noun nov = mug_w;
// printf("mug: dag!\n");
u2_rl_gain(ral_r, nov);
return nov;
} else {
u2_noun nov;
if ( u2_dog_is_pom(fiz) ) {
if ( u2_no == u2_rl_open(ral_r, c3_wiseof(u2_loom_cell)) ) {
u2_loop_signal_memory();
return u2_none;
}
else {
u2_weak hed, tel;
u2_ray nov_r;
if ( u2_none == (hed = u2_rl_copy(ral_r, *u2_at_pom_hed(fiz))) ) {
u2_loop_signal_memory();
return u2_none;
}
if ( u2_none == (tel = u2_rl_copy(ral_r, *u2_at_pom_tel(fiz))) ) {
u2_loop_signal_memory();
u2_rl_lose(ral_r, hed);
return u2_none;
}
nov_r = _rl_bloq_grab(ral_r, c3_wiseof(u2_loom_cell));
if ( 0 == nov_r ) {
u2_loop_signal_memory();
u2_rl_lose(ral_r, hed);
u2_rl_lose(ral_r, tel);
return u2_none;
}
nov = u2_pom_of(nov_r, 0);
*u2_at_dog_mug(nov) = mug_w;
*u2_at_pom_hed(nov) = hed;
*u2_at_pom_tel(nov) = tel;
c3_assert(u2_no == u2_rl_junior(ral_r, nov));
}
}
else {
c3_w len_w = *u2_at_pug_len(fiz);
u2_ray nov_r;
nov_r = _rl_bloq_grab(ral_r, (len_w + c3_wiseof(u2_loom_atom)));
if ( 0 == nov_r ) {
u2_loop_signal_memory();
return u2_none;
}
nov = u2_pug_of(nov_r, 0);
*u2_at_dog_mug(nov) = mug_w;
*u2_at_pug_len(nov) = len_w;
{
c3_w i_w;
for ( i_w=0; i_w < len_w; i_w++ ) {
*u2_at_pug_buf(nov, i_w) = *u2_at_pug_buf(fiz, i_w);
}
}
c3_assert(u2_no == u2_rl_junior(ral_r, nov));
}
// printf(" wiped fiz %x; was %x; now %x\n", fiz, mug_w, nov);
*u2_at_dog_mug(fiz) = nov;
return nov;
}
}
}
void
u2_rl_wash(u2_rail ral_r,
u2_dog fiz) // retain
{
if ( u2_yes == u2_rl_junior(ral_r, fiz) ) {
c3_w mug_w = *u2_at_dog_mug(fiz);
if ( mug_w >> 31 ) {
u2_noun nov = mug_w;
*u2_at_dog_mug(fiz) = *u2_at_dog_mug(nov);
// printf(" fixed fiz %x; was %x; now %x\n",
// fiz, mug_w, *u2_at_dog_mug(fiz));
if ( u2_yes == u2_dust(fiz) ) {
u2_rl_wash(ral_r, u2_h(fiz));
u2_rl_wash(ral_r, u2_t(fiz));
}
}
}
}
/* u2_rl_take():
**
** Produce `a`, not referencing the can. Copy or gain reference.
*/
u2_weak
u2_rl_take(u2_ray ral_r,
u2_noun fiz)
{
if ( u2_no == u2_rl_junior(ral_r, fiz) ) {
u2_rl_gain(ral_r, fiz);
return fiz;
} else {
u2_noun nov;
// printf("copy in %x\n", fiz);
{
nov = u2_rl_copy(ral_r, fiz);
u2_rl_wash(ral_r, fiz);
}
// printf("copy to %x\n", fiz);
return nov;
}
}
#endif
/* u2_rl_gc_mark_noun():
**
** Mark a noun for gc.
*/
c3_w
u2_rl_gc_mark_noun(u2_ray ral_r,
u2_noun som)
{
c3_w siz_w = 0;
c3_assert(som != u2_none);
top:
if ( u2_fly_is_dog(som) ) {
u2_ray som_r = u2_dog_a(som);
u2_ray hat_r = u2_rail_hat_r(ral_r);
if ( (u2_ray_a(som_r) == u2_ray_a(hat_r)) &&
(som_r >= u2_rail_rut_r(ral_r)) )
{
u2_ray box_r = (som_r - c3_wiseof(u2_loom_rail_box));
c3_w use_w = u2_rail_box_use(box_r);
c3_ws use_ws = (c3_ws) use_w;
c3_assert(use_ws != 0);
if ( use_ws < 0 ) {
use_ws -= 1;
use_w = (c3_w) use_ws;
u2_rail_box_use(box_r) = use_w;
}
else {
use_ws = -1;
use_w = (c3_w) use_ws;
u2_rail_box_use(box_r) = use_w;
siz_w += u2_rail_box_siz(box_r);
if ( u2_dog_is_pom(som) ) {
siz_w += u2_rl_gc_mark_noun(ral_r, u2_h(som));
som = u2_t(som);
goto top;
}
}
}
}
return siz_w;
}
/* u2_rl_gc_mark_ptr():
**
** Mark a pointer allocated with ralloc. Return allocated words.
*/
c3_w
u2_rl_gc_mark_ptr(u2_ray ral_r,
u2_ray ptr_r)
{
u2_ray hat_r = u2_rail_hat_r(ral_r);
if ( (u2_ray_a(ptr_r) == u2_ray_a(hat_r)) &&
(ptr_r >= u2_rail_rut_r(ral_r)) )
{
u2_ray box_r = (ptr_r - c3_wiseof(u2_loom_rail_box));
c3_w use_w = u2_rail_box_use(box_r);
c3_ws use_ws = (c3_ws) use_w;
c3_w siz_w = u2_rail_box_siz(box_r);
c3_assert(use_ws != 0);
if ( use_ws < 0 ) {
use_ws -= 1;
siz_w = 0;
} else {
use_ws = -1;
}
use_w = (c3_w) use_ws;
u2_rail_box_use(box_r) = use_w;
return siz_w;
}
else return 0;
}
/* u2_rl_gc_mark():
**
** Mark a rail. Return allocated words.
*/
c3_w
u2_rl_gc_mark(u2_ray ral_r)
{
u2_ray sop_r = u2_rail_rut_r(ral_r);
return u2_cs_mark(ral_r, u2_soup_lot_r(sop_r));
}
/* u2_rl_drain():
**
** Clear the memo cache (soup).
*/
void
u2_rl_drain(u2_ray ral_r)
{
if ( c3__rock == u2_rail_hip_m(ral_r) ) {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_cs_lose(ral_r, u2_soup_lot_r(sop_r));
}
}
/* u2_rl_gc_sweep():
**
** Sweep memory, freeing unused blocks. Match live, save leaked.
*/
c3_w
u2_rl_gc_sweep(u2_ray ral_r, c3_w sav_w)
{
u2_ray rut_r = u2_rail_rut_r(ral_r);
u2_ray hat_r = u2_rail_hat_r(ral_r);
u2_ray bot_r = (rut_r + c3_wiseof(u2_loom_soup));
u2_ray box_r = bot_r;
c3_w liv_w = 0;
c3_w lek_w = 0;
#if 0
while ( box_r < hat_r ) {
c3_w siz_w = u2_rail_box_siz(box_r);
c3_w use_w = u2_rail_box_use(box_r);
if ( use_w > 3 ) {
printf("box %x, siz %d, use %d\n", box_r, siz_w, use_w);
}
box_r += siz_w;
}
#endif
while ( box_r < hat_r ) {
c3_w siz_w = u2_rail_box_siz(box_r);
c3_w use_w = u2_rail_box_use(box_r);
c3_ws use_ws = (c3_ws) use_w;
if ( use_ws > 0 ) {
# ifdef U2_LEAK_DEBUG
c3_w cod_w = u2_rail_box_cod(box_r);
if ( 0 == cod_w ) {
fprintf(stderr, "\rleak: <unknown> box %x, siz %d, use %d\r\n",
box_r, siz_w, use_w);
} else {
fprintf(stderr, "\rleak: %s: box %x, siz %d, use %d\r\n",
u2_cr_string(cod_w),
box_r, siz_w, use_w);
}
#endif
lek_w += siz_w;
u2_rail_box_use(box_r) = 0;
_rl_bloq_free(ral_r, box_r);
}
else if ( use_ws < 0 ) {
// printf("live: box %x, siz %d, use %d\n", box_r, siz_w, use_w);
use_ws = (0 - use_ws);
use_w = (c3_w) use_ws;
u2_rail_box_use(box_r) = use_w;
liv_w += siz_w;
}
box_r += siz_w;
}
c3_assert(liv_w == sav_w);
return lek_w;
}
#if 0
/* u2_rl_take():
**
** Produce `a`, not referencing the can. Copy or gain reference.
*/
u2_weak
u2_rl_take(u2_ray ral_r,
u2_noun fiz)
{
if ( u2_no == u2_rl_junior(ral_r, fiz) ) {
u2_rl_gain(ral_r, fiz);
return fiz;
} else {
if ( u2_dog_is_pom(fiz) ) {
if ( u2_no == u2_rl_open(ral_r, c3_wiseof(u2_loom_cell)) ) {
u2_loop_signal_memory();
return u2_none;
}
else {
u2_weak hed, tel;
u2_ray nov_r;
u2_noun nov;
if ( u2_none == (hed = u2_rl_take(ral_r, *u2_at_pom_hed(fiz))) ) {
u2_loop_signal_memory();
return u2_none;
}
if ( u2_none == (tel = u2_rl_take(ral_r, *u2_at_pom_tel(fiz))) ) {
u2_loop_signal_memory();
u2_rl_lose(ral_r, hed);
return u2_none;
}
nov_r = _rl_bloq_grab(ral_r, c3_wiseof(u2_loom_cell));
if ( 0 == nov_r ) {
u2_loop_signal_memory();
u2_rl_lose(ral_r, hed);
u2_rl_lose(ral_r, tel);
return u2_none;
}
nov = u2_pom_of(nov_r, 0);
*u2_at_dog_mug(nov) = *u2_at_dog_mug(fiz);
*u2_at_pom_hed(nov) = hed;
*u2_at_pom_tel(nov) = tel;
c3_assert(u2_no == u2_rl_junior(ral_r, nov));
return nov;
}
}
else {
c3_w len_w = *u2_at_pug_len(fiz);
u2_ray nov_r;
u2_noun nov;
nov_r = _rl_bloq_grab(ral_r, (len_w + c3_wiseof(u2_loom_atom)));
if ( 0 == nov_r ) {
u2_loop_signal_memory();
return u2_none;
}
nov = u2_pug_of(nov_r, 0);
*u2_at_dog_mug(nov) = 0;
*u2_at_pug_len(nov) = len_w;
{
c3_w i_w;
for ( i_w=0; i_w < len_w; i_w++ ) {
*u2_at_pug_buf(nov, i_w) = *u2_at_pug_buf(fiz, i_w);
}
}
c3_assert(u2_no == u2_rl_junior(ral_r, nov));
return nov;
}
}
}
#endif
/* u2_rl_slab():
**
** Create a blank atomic slab of `len` words.
*/
u2_ray
u2_rl_slab(u2_rail ral_r,
c3_w len_w)
{
u2_ray nov_r = u2_rl_ralloc(ral_r, (len_w + c3_wiseof(u2_loom_atom)));
u2_atom nov = u2_pug_of(nov_r, 0);
*u2_at_dog_mug(nov) = 0;
*u2_at_pug_len(nov) = len_w;
/* Clear teh slab.
*/
{
c3_w i_w;
for ( i_w=0; i_w < len_w; i_w++ ) {
*u2_at_pug_buf(nov, i_w) = 0;
}
}
return (nov_r + c3_wiseof(u2_loom_atom));
}
/* u2_rl_slaq():
**
** Create a blank atomic slab of `len` bloqs of size `met`.
*/
u2_ray
u2_rl_slaq(u2_wire ral_r,
c3_g met_g,
c3_w len_w)
{
return u2_rl_slab(ral_r, ((len_w << met_g) + 31) >> 5);
}
/* u2_rl_mint():
**
** Initialize slab `sal` as an atom, externally measured.
*/
u2_atom
u2_rl_mint(u2_rail ral_r,
u2_ray sal_r,
c3_w len_w)
{
u2_ray nov_r = (sal_r - c3_wiseof(u2_loom_atom));
u2_atom nov = u2_pug_of(nov_r, 0);
/* See if we can free the slab entirely.
*/
if ( len_w == 0 ) {
u2_rl_lose(ral_r, nov);
return _0;
}
else if ( len_w == 1 ) {
c3_w low_w = *u2_at_pug_buf(nov, 0);
if ( u2_fly_is_cat(low_w) ) {
u2_rl_lose(ral_r, nov);
return low_w;
}
}
/* See if we can strip off a block on the end.
*/
{
c3_w old_w = *u2_at_pug_len(nov);
c3_w dif_w = (old_w - len_w);
if ( dif_w >= 6 ) {
u2_ray box_r = nov_r - c3_wiseof(u2_loom_rail_box);
u2_ray end_r = (nov_r + c3_wiseof(u2_loom_atom) + len_w + 1);
c3_w asz_w = (end_r - box_r);
c3_w bsz_w = *u2_at_ray(box_r) - asz_w;
_rl_bloq_make(ral_r, end_r, bsz_w, 0);
_rl_bloq_attach(ral_r, end_r);
*u2_at_ray(box_r) = asz_w;
*u2_at_ray(box_r + asz_w - 1) = asz_w;
}
*u2_at_pug_len(nov) = len_w;
}
return nov;
}
/* u2_rl_moot():
**
** Initialize slab `sal` as an atom, originally measured.
*/
u2_atom // transfer
u2_rl_moot(u2_rail ral_r,
u2_ray sal_r)
{
u2_ray nov_r = (sal_r - c3_wiseof(u2_loom_atom));
u2_atom nov = u2_pug_of(nov_r, 0);
c3_w len_w = *u2_at_pug_len(nov);
c3_w las_w = *u2_at_pug_buf(nov, (len_w - 1));
c3_assert(0 != las_w);
if ( 1 == len_w ) {
if ( u2_fly_is_cat(las_w) ) {
u2_rl_lose(ral_r, nov);
return las_w;
}
}
return nov;
}
/* u2_rl_malt():
**
** Initialize slab `sal` as an atom, internally measured.
*/
u2_atom
u2_rl_malt(u2_rail ral_r,
u2_ray sal_r)
{
u2_ray nov_r = (sal_r - c3_wiseof(u2_loom_atom));
u2_atom nov = u2_pug_of(nov_r, 0);
c3_w len_w;
for ( len_w = *u2_at_pug_len(nov); len_w; len_w-- ) {
if ( 0 != *u2_at_pug_buf(nov, (len_w - 1)) ) {
break;
}
}
return u2_rl_mint(ral_r, sal_r, len_w);
}
/* u2_rl_bytes():
**
** Copy `a` bytes from `b` to an LSB first atom.
*/
u2_weak // transfer
u2_rl_bytes(u2_ray ral_r,
c3_w a_w,
const c3_y* b_y)
{
/* Strip trailing zeroes.
*/
while ( a_w && !b_y[a_w - 1] ) {
a_w--;
}
/* Check for cat.
*/
if ( a_w <= 4 ) {
if ( !a_w ) {
return 0;
}
else if ( a_w == 1 ) {
return b_y[0];
}
else if ( a_w == 2 ) {
return (b_y[0] | (b_y[1] << 8));
}
else if ( a_w == 3 ) {
return (b_y[0] | (b_y[1] << 8) | (b_y[2] << 16));
}
else if ( (b_y[3] <= 0x7f) ) {
return (b_y[0] | (b_y[1] << 8) | (b_y[2] << 16) | (b_y[3] << 24));
}
}
/* Allocate, fill, return.
*/
{
c3_w len_w = (a_w + 3) >> 2;
if ( len_w >= (1 << 27) ) {
u2_loop_signal_memory();
return u2_none;
}
if ( u2_no == u2_rl_open(ral_r, (len_w + c3_wiseof(u2_loom_atom))) ) {
u2_loop_signal_memory();
return u2_none;
}
else {
u2_ray nov_r;
u2_noun nov;
nov_r = _rl_bloq_grab(ral_r, (len_w + c3_wiseof(u2_loom_atom)));
nov = u2_pug_of(nov_r, 0);
*u2_at_dog_mug(nov) = 0;
*u2_at_pug_len(nov) = len_w;
/* Clear the words.
*/
{
c3_w i_w;
for ( i_w=0; i_w < len_w; i_w++ ) {
*u2_at_pug_buf(nov, i_w) = 0;
}
}
/* Fill the bytes.
*/
{
c3_w i_w;
for ( i_w=0; i_w < a_w; i_w++ ) {
*u2_at_pug_buf(nov, (i_w >> 2))
|=
(b_y[i_w] << ((i_w & 3) * 8));
}
}
return nov;
}
}
}
/* u2_rl_cell():
**
** Produce the cell `[a b]`.
*/
u2_weak // transfer
u2_rl_cell(u2_ray ral_r,
u2_weak a, // transfer
u2_weak b) // transfer
{
if ( (u2_none == a) || (u2_none == b) ) {
u2_rl_lose(ral_r, a);
u2_rl_lose(ral_r, b);
return u2_none;
}
/* Seniority restrictions. Ice if these cannot be met.
*/
{
if ( u2_yes == u2_rl_junior(ral_r, a) ) {
u2_noun som = a;
u2_ray som_r = u2_dog_a(som);
u2_ray hat_r = u2_rail_hat_r(ral_r);
u2_ray mat_r = u2_rail_mat_r(ral_r);
u2_nit som_n = u2_ray_fnit(som_r);
u2_nit hat_n = u2_ray_fnit(hat_r);
u2_nit mat_n = u2_ray_fnit(mat_r);
if ( u2_ray_a(hat_r) == 0 ) {
if ( (som_n >= hat_n) && (som_n <= mat_n) )
printf("junior x\n");
} else {
if ( (som_n >= mat_n) && (som_n <= hat_n) ) {
printf("junior y\n");
printf("hat %d.%d == %d\n",
u2_ray_a(hat_r), u2_ray_b(hat_r), u2_ray_fnit(hat_r));
printf("mat %d.%d == %d\n",
u2_ray_a(mat_r), u2_ray_b(mat_r), u2_ray_fnit(mat_r));
printf("som %d.%d == %d\n",
u2_ray_a(som_r), u2_ray_b(som_r), u2_ray_fnit(som_r));
}
}
}
c3_assert(u2_no == u2_rl_junior(ral_r, a));
c3_assert(u2_no == u2_rl_junior(ral_r, b));
}
{
u2_ray nov_r;
u2_noun nov;
nov_r = _rl_bloq_grab(ral_r, c3_wiseof(u2_loom_cell));
nov = u2_pom_of(nov_r, 0);
*u2_at_dog_mug(nov) = 0;
*u2_at_pom_hed(nov) = a;
*u2_at_pom_tel(nov) = b;
return nov;
}
}
/* u2_rl_list():
**
** Produce a null-terminated list, terminating `...` with `u2_none`.
*/
u2_weak // transfer
u2_rl_list(u2_rail ral_r,
...) // transfer
{
c3_w len_w = 0;
va_list vap;
/* Count.
*/
{
va_start(vap, ral_r);
while ( u2_none != va_arg(vap, u2_noun) ) {
len_w++;
}
va_end(vap);
}
/* Allocate.
*/
{
c3_w i_w;
u2_noun yit[len_w];
va_start(vap, ral_r);
for ( i_w = 0; i_w < len_w; i_w++ ) {
yit[i_w] = va_arg(vap, u2_weak);
}
va_end(vap);
/* Construct.
*/
{
u2_weak woq = u2_nul;
for ( i_w = 0; i_w < len_w; i_w++ ) {
woq = u2_rc(ral_r, yit[len_w - (i_w + 1)], woq);
}
return woq;
}
}
}
/* u2_rl_molt():
**
** Mutate `som` with a 0-terminated list of axis, noun pairs.
** Axes must be cats (31 bit).
*/
struct _molt_pair {
c3_w axe_w;
u2_noun som;
};
static c3_w
_molt_cut(c3_w len_w,
struct _molt_pair* pms_m)
{
c3_w i_w, cut_t, cut_w;
cut_t = c3_false;
cut_w = 0;
for ( i_w = 0; i_w < len_w; i_w++ ) {
c3_w axe_w = pms_m[i_w].axe_w;
if ( (cut_t == c3_false) && (3 == u2_ax_cap(axe_w)) ) {
cut_t = c3_true;
cut_w = i_w;
}
pms_m[i_w].axe_w = u2_ax_mas(axe_w);
}
return cut_t ? cut_w : i_w;
}
static u2_weak // transfer
_molt_apply(u2_rail ral_r,
u2_weak som, // retain
c3_w len_w,
struct _molt_pair* pms_m) // transfer
{
if ( len_w == 0 ) {
return u2_rl_take(ral_r, som);
}
else if ( (len_w == 1) && (1 == pms_m[0].axe_w) ) {
return pms_m[0].som;
}
else {
c3_w cut_w = _molt_cut(len_w, pms_m);
if ( u2_no == u2_dust(som) ) {
return u2_rc
(ral_r,
_molt_apply(ral_r, u2_nul, cut_w, pms_m),
_molt_apply(ral_r, u2_nul, (len_w - cut_w), (pms_m + cut_w)));
} else {
return u2_rc
(ral_r,
_molt_apply(ral_r, u2_h(som), cut_w, pms_m),
_molt_apply(ral_r, u2_t(som), (len_w - cut_w), (pms_m + cut_w)));
}
}
}
u2_weak // transfer
u2_rl_molt(u2_rail ral_r,
u2_weak som, // retain
...) // transfer
{
va_list ap;
c3_w len_w;
struct _molt_pair* pms_m;
/* Count.
*/
len_w = 0;
{
va_start(ap, som);
while ( 1 ) {
if ( 0 == va_arg(ap, c3_w) ) {
break;
}
va_arg(ap, u2_weak*);
len_w++;
}
va_end(ap);
}
pms_m = alloca(len_w * sizeof(struct _molt_pair));
/* Install.
*/
{
c3_w i_w;
va_start(ap, som);
for ( i_w = 0; i_w < len_w; i_w++ ) {
pms_m[i_w].axe_w = va_arg(ap, c3_w);
pms_m[i_w].som = va_arg(ap, u2_noun);
}
va_end(ap);
}
/* Apply.
*/
return _molt_apply(ral_r, som, len_w, pms_m);
}
/* u2_rl_molv():
**
** As u2_rl_molt(), by argument pointer.
*/
u2_weak // transfer
u2_rl_molv(u2_rail ral_r,
u2_weak som, // retain
va_list vap) // transfer
{
va_list vaq;
c3_w len_w;
struct _molt_pair* pms_m;
/* Count.
*/
len_w = 0;
{
va_copy(vaq, vap);
while ( 1 ) {
if ( 0 == va_arg(vaq, c3_w) ) {
break;
}
va_arg(vaq, u2_weak*);
len_w++;
}
va_end(vaq);
}
pms_m = alloca(len_w * sizeof(struct _molt_pair));
/* Install.
*/
{
c3_w i_w;
va_copy(vaq, vap);
for ( i_w = 0; i_w < len_w; i_w++ ) {
pms_m[i_w].axe_w = va_arg(vaq, c3_w);
pms_m[i_w].som = va_arg(vaq, u2_noun);
}
va_end(vaq);
}
/* Apply.
*/
return _molt_apply(ral_r, som, len_w, pms_m);
}
/* u2_rl_mp():
**
** Copy the GMP integer [a] into an atom.
*/
u2_weak // transfer
u2_rl_mp(u2_ray ral_r,
mpz_t a_mp) // transfer (GMP)
{
/* Efficiency: unnecessary copy.
*/
{
c3_w pyg_w = mpz_size(a_mp) * ((sizeof(mp_limb_t)) / 4);
c3_w *buz_w = alloca(pyg_w * 4);
c3_w i_w;
for ( i_w = 0; i_w < pyg_w; i_w++ ) {
buz_w[i_w] = 0;
}
mpz_export(buz_w, 0, -1, 4, 0, 0, a_mp);
mpz_clear(a_mp);
return u2_rl_words(ral_r, pyg_w, buz_w);
}
}
/* u2_rl_rack():
**
** Produce an n-tuple, terminating `...` with `u2_none`.
*/
u2_weak // transfer
u2_rl_rack(u2_rail ral_r,
...) // transfer
{
c3_w len_w = 0;
va_list vap;
/* Count.
*/
{
va_start(vap, ral_r);
while ( u2_none != va_arg(vap, u2_noun) ) {
len_w++;
}
va_end(vap);
if ( 0 == len_w ) {
return u2_none;
}
}
/* Allocate.
*/
{
c3_w i_w;
u2_noun yit[len_w];
va_start(vap, ral_r);
for ( i_w = 0; i_w < len_w; i_w++ ) {
yit[i_w] = va_arg(vap, u2_weak);
}
va_end(vap);
/* Construct.
*/
{
u2_weak woq = yit[len_w - 1];
for ( i_w = 1; i_w < len_w; i_w++ ) {
woq = u2_rc(ral_r, yit[len_w - (i_w + 1)], woq);
}
return woq;
}
}
}
/* u2_rl_string():
**
** Produce an LSB-first atom from the C string `a`.
*/
u2_weak // transfer
u2_rl_string(u2_ray ral_r,
const c3_c* a_c)
{
return u2_rl_bytes(ral_r, strlen(a_c), (c3_y *)a_c);
}
/* u2_rl_vint():
**
** Create `a + 1`.
*/
u2_weak // transfer
u2_rl_vint(u2_rail ral_r,
u2_weak a) // transfer
{
if ( u2_none == a ) {
return a;
} else {
if ( u2_fly_is_cat(a) ) {
c3_w vin_w = (a + 1);
if ( a == 0x7fffffff ) {
return u2_rl_words(ral_r, 1, &vin_w);
}
else return vin_w;
}
else if ( u2_yes == u2du(a) ) {
return u2_none;
}
else {
mpz_t a_mp;
u2_mp(a_mp, a);
mpz_add_ui(a_mp, a_mp, 1);
return u2_rl_mp(ral_r, a_mp);
}
}
}
/* u2_rl_words():
**
** Copy [a] words from [b] into an atom.
*/
u2_weak // transfer
u2_rl_words(u2_ray ral_r,
c3_w a_w,
const c3_w* b_w)
{
/* Strip trailing zeroes.
*/
while ( a_w && !b_w[a_w - 1] ) {
a_w--;
}
/* Check for cat.
*/
if ( !a_w ) {
return 0;
}
else if ( (a_w == 1) && !(b_w[0] >> 31) ) {
return b_w[0];
}
/* Allocate, fill, return.
*/
{
if ( a_w >= (1 << 27) ) {
u2_loop_signal_memory();
return u2_none;
}
if ( u2_no == u2_rl_open(ral_r, (a_w + c3_wiseof(u2_loom_atom))) ) {
return u2_none;
}
else {
u2_ray nov_r;
u2_noun nov;
nov_r = _rl_bloq_grab(ral_r, (a_w + c3_wiseof(u2_loom_atom)));
nov = u2_pug_of(nov_r, 0);
*u2_at_dog_mug(nov) = 0;
*u2_at_pug_len(nov) = a_w;
/* Fill the words.
*/
{
c3_w i_w;
for ( i_w=0; i_w < a_w; i_w++ ) {
*u2_at_pug_buf(nov, i_w) = b_w[i_w];
}
}
return nov;
}
}
}
/* u2_rl_find():
**
** Cache search for function (0 means nock) and sample.
*/
u2_weak // transfer
u2_rl_find(u2_ray ral_r,
u2_mote fun_m,
u2_noun sam) // retain
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return u2_none;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
u2_noun pro = u2_cs_find(ral_r, lot_r, fun_m, sam);
return u2_rx(ral_r, pro);
}
}
/* u2_rl_find_cell():
**
** As `u2_rl_find()`, for `[a b]`.
*/
u2_weak // transfer
u2_rl_find_cell(u2_ray ral_r,
u2_mote fun_m,
u2_noun a, // retain
u2_noun b) // retain
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return u2_none;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
u2_noun pro = u2_cs_find_cell(ral_r, lot_r, fun_m, a, b);
return u2_rx(ral_r, pro);
}
}
/* u2_rl_find_trel():
**
** As `u2_rl_find()`, for `[a b c]`.
*/
u2_weak // transfer
u2_rl_find_trel(u2_ray ral_r,
u2_mote fun_m,
u2_noun a, // retain
u2_noun b, // retain
u2_noun c) // retain
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return u2_none;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
u2_noun pro = u2_cs_find_trel(ral_r, lot_r, fun_m, a, b, c);
return u2_rx(ral_r, pro);
}
}
/* u2_rl_find_qual():
**
** As `u2_rl_find()`, for `[a b c d]`.
*/
u2_weak // transfer
u2_rl_find_qual(u2_ray ral_r,
u2_mote fun_m,
u2_noun a, // retain
u2_noun b, // retain
u2_noun c, // retain
u2_noun d) // retain
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return u2_none;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
u2_noun pro = u2_cs_find_qual(ral_r, lot_r, fun_m, a, b, c, d);
return u2_rx(ral_r, pro);
}
}
/* u2_rl_save():
**
** Cache store for function (0 means nock), sample and product.
*/
u2_noun // transfer
u2_rl_save(u2_ray ral_r,
u2_mote fun_m,
u2_noun sam, // retain
u2_noun pro) // transfer
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return pro;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
return u2_cs_save(ral_r, lot_r, fun_m, sam, pro);
}
}
/* u2_rl_uniq():
**
** Use cache to render object unique.
*/
u2_noun // produce
u2_rl_uniq(u2_ray ral_r,
u2_noun som) // submit
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return som;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
return u2_cs_save(ral_r, lot_r, 1, som, som);
}
}
/* u2_rl_save_cell():
**
** As `u2_rl_save()`, for `[a b]`.
*/
u2_weak // transfer
u2_rl_save_cell(u2_ray ral_r,
u2_mote fun_m,
u2_noun a, // retain
u2_noun b, // retain
u2_noun pro) // transfer
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return pro;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
return u2_cs_save_cell(ral_r, lot_r, fun_m, a, b, pro);
}
}
/* u2_rl_save_trel():
**
** As `u2_rl_save()`, for `[a b c]`.
*/
u2_weak // transfer
u2_rl_save_trel(u2_ray ral_r,
u2_mote fun_m,
u2_noun a, // retain
u2_noun b, // retain
u2_noun c, // retain
u2_noun pro) // transfer
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return pro;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
return u2_cs_save_trel(ral_r, lot_r, fun_m, a, b, c, pro);
}
}
/* u2_rl_save_qual():
**
** As `u2_rl_save()`, for `[a b c d]`.
*/
u2_weak // transfer
u2_rl_save_qual(u2_ray ral_r,
u2_mote fun_m,
u2_noun a, // retain
u2_noun b, // retain
u2_noun c, // retain
u2_noun d, // retain
u2_noun pro) // transfer
{
if ( c3__rock != u2_rail_hip_m(ral_r) ) {
return pro;
} else {
u2_ray sop_r = u2_rail_rut_r(ral_r);
u2_ray lot_r = u2_soup_lot_r(sop_r);
return u2_cs_save_qual(ral_r, lot_r, fun_m, a, b, c, d, pro);
}
}
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